BRANDYWINE REALTY TRUST
8-K, 1996-12-17
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549




                                    FORM 8-K

                                 CURRENT REPORT


                  FILED PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



        Date of Report (Date of earliest event reported) December 2, 1996



                             BRANDYWINE REALTY TRUST
             (Exact name of registrant as specified in its charter)




          MARYLAND                      1-9106                23-2413352
(State or Other Jurisdiction         (Commission          (I.R.S. Employer
     of Incorporation)               file number)      Identification Number)



             16 CAMPUS BOULEVARD, NEWTOWN SQUARE, PENNSYLVANIA 19073
                    (Address of principal executive offices)


                                 (610) 325-5600
              (Registrant's telephone number, including area code)







                 Page 1 of 7 pages
<PAGE>   2
ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS.

            On December 2, 1996, the Company acquired four commercial properties
(the "Additional Properties") in suburban Philadelphia aggregating approximately
242,000 net rentable square feet for an aggregate cash purchase price of $22.8
million. The purchase price for each of the Additional Properties was determined
through negotiation in an arms-length transaction. The Company holds its
interest in each of the Acquisition Properties through Brandywine Operating
Partnership, L.P., a Delaware limited partnership (the "Operating Partnership"),
of which the Company is the sole general partner and in which the Company, as of
the date hereof, owns an approximately 94% interest.

1. The Company acquired from K/B Fund II, the ground lessee's interest in
Delaware Corporate Center I (One Righter Parkway), a 104,828 net rentable square
foot office building located in New Castle County, Delaware, for $12.7 million
in cash. The ground lessor of the property is Woodlawn Trustees, Incorporated.
The building was built in 1989 and was 100% leased as of September 30, 1996 to 6
tenants.

2. The Company acquired from Horsham Office Centre Associates Limited
Partnership two buildings in Horsham, Pennsylvania for an aggregate purchase
price of $7.1 million in cash. The buildings are 700 Business Center Drive, a
30,773 net rentable square foot office building built in 1986, and 800 Business
Center Drive, a 51,236 net rentable square foot office building built in 1986.
700 and 800 Business Center Drive were each 100% leased as of September 30, 1996
to a total of 6 tenants.

3. The Company acquired from Monumental Life Insurance Company 8000 Lincoln
Drive, a 54,923 net rentable square foot office building built in 1983 and
located in Evesham, New Jersey, for $3.0 million in cash. The building was 100%
leased as of November 30, 1996 to 2 tenants.

The Company acquired the Additional Properties with proceeds from the equity
offerings summarized in response to Item 5 below.

Following completion of the foregoing acquisitions, the Company's portfolio
consists of 37 commercial office and industrial properties

For additional information concerning the Additional Properties, reference is
made to the information under the heading "Business and Properties" in the
Registration Statement on Form S-11 (Registration No. 333-13969), as amended
(the "Registration Statement"), filed by the Company with the Securities and
Exchange Commission and declared effective on November 25, 1996, and such
information is hereby incorporated herein by reference.


                                      -2-
<PAGE>   3
ITEM 5.  OTHER EVENTS.

On December 2, 1996, the Company consummated a public offering (the "Offering")
of 4,000,000 common shares of beneficial interest, par value $.01 per share
("Common Shares), at a price to the public of $16.50 per share. Proceeds to the
Company, net of underwriting discounts and commissions equal to $1.03 per share,
and net of an advisory fee paid to Smith Barney Inc. and Legg Mason Wood Walker
Incorporated equal to 1.70% of the gross proceeds of the Offering, but before
deducting other expenses, equaled $60,758,000. On December 2, 1996, the Company
directly placed with: (i) a voting trust established for the benefit of the
Commonwealth of Pennsylvania State Employes' Retirement System, as advised by
Radnor Advisors Inc., 636,363 Common Shares at a price of $16.50 per share and
(ii) two investment funds advised by Morgan Stanley Asset Management Inc. an
aggregate of 709,090 Common Shares at a price per Common Share of $16.50. The
Company granted to the underwriters of the Offering a 30-day option to purchase
up to 600,000 additional Common Shares solely to cover over-allotments, if any.
The overallotment was exercised and the Company issued 600,000 Common Shares
pursuant thereto on December 13, 1996.

The Company contributed all of the net proceeds of the foregoing share issuances
to the Operating Partnership in exchange for 5,345,453 units of general
partnership interests therein. The Operating Partnership used the proceeds of
such contribution as follows:

      a. approximately $49.0 million was used to repay mortgage and other
indebtedness;

      b. approximately $22.8 million was used to acquire the Additional
Properties;

      c. approximately $0.6 million (fees to lenders) was used to pay fees
associated with the Line of Credit (discussed below); and

      d. approximately $2.5 million was used to pay expenses associated with the
Offering, the two additional equity financings, the Line of Credit and the
acquisitions of the Additional Properties.

The balance of the proceeds will be used for working capital purposes.

On December 2, 1996, the Company and its subsidiaries entered into a two-year,
$80 million secured revolving credit facility (the "Credit Facility") with Smith
Barney Mortgage Capital Group, Inc. and NationsBank, N.A. The Credit Facility is
a recourse obligation of the Company and its subsidiaries, secured by, among
other items, cross-collateralized and cross-defaulted first mortgage liens on 25
of the 37 properties currently owned by the Company and its subsidiaries. The
Credit Facility bears interest at a per annum floating rate equal to the 30, 60
or 90-day LIBOR, plus 175 basis points. The Credit Facility requires monthly
payments of interest only, with all outstanding advances and all accrued but
unpaid interest due December 1, 1998. A commitment fee equal to


                                      -3-
<PAGE>   4
$600,000 was paid to the lenders at the closing. In addition, a fee 0.25% per
annum (0.125% per annum until April 1, 1997) on the unused amount of the Credit
Facility is payable quarterly in

arrears. An annual fee of $35,000 is payable to NationsBank, N.A. for
administration of the Credit Facility. The Credit Facility carries loan to
value, minimum debt service coverage, fixed charge, net worth ratios and other
financial covenants and tests, minimum occupancy requirements and requires
prepayment premiums in certain instances.

Subject to detailed terms, conditions and limitations contained in the Credit
Facility documents, proceeds of the Credit Facility will be available (i) to
refinance properties from time to time added to the collateral pool of the
Credit Facility, (ii) to finance the acquisition of additional properties, (iii)
to finance the acquisition and development of unimproved land, (iv) to finance
the renovation of and capital improvements required at properties of the Company
and its subsidiaries (whether or not part of the collateral pool for the Credit
Facility), (v) general trust, corporate and partnership purposes of the Company
and its subsidiaries, and (vi) for the issuance of letters of credit; provided
that the principal balance outstanding under the Credit Facility for renovation
and capital improvements and general trust, corporate and partnership purposes
shall at no time exceed $10 million in the aggregate, and provided, further that
the aggregate principal balance outstanding under the Credit Facility, and the
aggregate amount available for draw under outstanding letters of credit shall at
no time exceed the maximum amount available under the Credit Facility from time
to time.

The Credit Facility provides a mechanism for the issuance of letters of credit
on behalf of the Company and its subsidiaries, each such credit to be in an
amount not less than $100,000, there being at no time more than five (5) letters
of credit in the aggregate then outstanding. The amount available for draw under
outstanding letters of credit may at no time exceed $10 million. The Credit
Facility provides for letter of credit fees being payable in full on the date of
issuance.

The Credit Facility contains provisions limiting the amount of other secured and
unsecured debt maintained by the Company and its subsidiaries from time to time.

The Credit Facility contains detailed provisions regarding compliance with
environmental laws. The Company and its subsidiaries have also delivered to the
co-lenders a certain Hazardous Material Guaranty and Indemnification Agreement.

Smith Barney Mortgage Capital Group, Inc. and NationsBank, N.A. reserve the
right to syndicate the Credit Facility and transfer direct interests or sell
conventional participation interests therein; provided, however, that the
Company has secured commitments from Smith Barney (or the Travelers Insurance
Corporation) and NationsBank (or an affiliate) such that each shall maintain not
less than a $15 million direct interest in the maximum committed amount of the
Credit Facility, such commitment being conditioned upon there being no uncured
Event of Default under the Credit Facility.


                                      -4-
<PAGE>   5
ITEM 7. FINANCIAL STATEMENT, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

      (a) Financial Statements of Businesses Acquired.

            The audited combined statement of revenue and certain expenses of
the Delaware Corporate Center for the year ended December 31, 1995 is
incorporated by reference from pages F-53 through F-56 of the Registration
Statement.

            The unaudited interim combined statement of revenue and expenses of
the Delaware Corporate Center included therein, and incorporated by reference
herein, include all adjustments consisting only of normal recurring accruals,
which the Company considers necessary for a fair presentation of the Delaware
Corporate Center revenues and certain expenses for the nine months ended
September 30, 1995 and 1996, as presented in the unaudited interim financial
statements.

            The audited combined statement of revenue and certain expenses of
700/800 Business Center Drive for the year ended December 31, 1995 is
incorporated by reference from pages F-57 and F-59 of the Registration
Statement.

            The unaudited interim statements of revenue and expenses of 700/800
Business Center Drive included therein, and incorporated by reference herein,
include all adjustments consisting only of normal recurring accruals, which the
Company considers necessary for a fair presentation of 700/800 Business Center
Drive revenues and certain expenses for the nine months ended September 30, 1995
and 1996, as presented in the unaudited interim financial statements.

      (b) Pro Forma Financial Information.

            Pro forma financial information which reflects the Company's
acquisition of the Additional Properties as of September 30, 1996 and for the
year ended December 31, 1995 and the nine months ended September 30, 1996 is
incorporated by reference from pages F-3 to F-13 of the Registration Statement.


                                      -5-
<PAGE>   6
      (c) Exhibits.

            3.1 Articles of Amendment to Declaration of Trust filed with the
State Department of Assessments and Taxation of Maryland on November 25, 1996.

            10.1 Credit Agreement, with Exhibits.

            10.2 The audited combined statement of revenue and certain expenses
of the Delaware Corporate Center for the year ended December 31, 1995 and the
unaudited interim combined statement of revenue and expenses of the Delaware
Corporate Center included therein. Incorporated by reference from the
Registration Statement.

            10.3 The audited combined statement of revenue and certain expenses
of 700/800 Business Center Drive for the year ended December 31, 1995 and the
unaudited interim statements of revenue and expenses of 700/800 Business Center
Drive included therein. Incorporated by reference from the Registration
Statement.

            10.4 Pro forma financial information which reflects the Company's
acquisition of the Additional Properties as of September 30, 1996 and for the
year ended December 31, 1995 and the nine months ended September 30, 1996.
Incorporated by reference from the Registration Statement.

            10.5 Excerpt from Registration Statement on Form S-11 (No.
333-13969), as amended, consisting of the discussion under the heading "Business
and Properties." Incorporated by reference from the Registration Statement.

            23.1 Consents of Arthur Andersen LLP.


                                      -6-
<PAGE>   7
                                    SIGNATURE

            Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                                 BRANDYWINE REALTY TRUST


Date: December 16, 1996                          By: /s/ Gerard H. Sweeney
                                                     -------------------------
                                                     Title:  President and Chief
                                                               Executive Officer


                                      -7-

<PAGE>   1
Exhibit 3.1


                             BRANDYWINE REALTY TRUST

                  ARTICLES OF AMENDMENT TO DECLARATION OF TRUST

THIS IS TO CERTIFY THAT:

            FIRST: The Declaration of Trust of Brandywine Realty Trust, a
Maryland real estate investment trust (the "Trust"), is hereby amended by
deleting existing Section 6.1 in its entirety and adding a new Section 6.1 to
read as follows:

            "Section 6.1: Authorized Shares. The total number of shares of
beneficial interest which the Trust is authorized to issue is 30,000,000, of
which 5,000,000 shares shall be preferred shares, par value $.01 per share
("Preferred Shares"), and 25,000,000 shares shall be common shares, $.01 par
value per share ("Common Shares")"

            SECOND: The amendment to the Declaration of Trust of the Trust as
hereinabove set forth has been duly advised by the Board of Trustees at a
meeting held on November 1, 1996, pursuant to authority granted to the Board in
Section 3.2 (o) of the Declaration of Trust, as approved by the shareholders of
the Trust.

            THIRD: The total number of shares of beneficial interest which the
Trust had authority to issue immediately prior to this amendment was 80,000,000
shares of beneficial interest, consisting of 5,000,000 preferred shares, $.01
par value per share, and 75,000,000 common shares, $.01 par value per share.

            FOURTH: The total number of shares of beneficial interest which the
Trust has authority to issue, pursuant to the Declaration of Trust of the Trust
as hereby amended, is 30,000,000 shares of beneficial interest, consisting of
5,000,000 preferred shares, $.01 par value per share, and 25,000,000 common
shares, $.01 par value per share.

            FIFTH: The undersigned Vice President acknowledges these Articles of
Amendment to be the trust act of the Trust and, as to all matters or facts
required to be verified under oath, the undersigned Vice President acknowledges
that to the best of her knowledge, information and belief, these matters and
facts are true in all material respects and that this statement is made under
the penalties for perjury.
<PAGE>   2
            IN WITNESS WHEREOF, the Trust has caused these presents to be signed
in its name and on its behalf by its Vice President and attested to by its
Assistant Secretary on this 22nd day of November, 1996.



ATTEST:                                 BRANDYWINE REALTY TRUST



/s/ John Adderly                        By: /s/ Francine M. Haulenbeek
- ----------------------                      -----------------------------------
John Adderly                                Francine M. Haulenbeek,
Assistant Secretary                         Vice President, Secretary and
                                            Treasurer

<PAGE>   1
                                CREDIT AGREEMENT







                         Dated: As of November 25, 1996



























                        This Instrument Prepared by:


                        Dean A. Stiffle, Esq.
                        Battle Fowler LLP
                        75 East 55th Street
                        New York, New York  10022
<PAGE>   2
                                TABLE OF CONTENTS

                                                                           Page
                                                                           ----
1.  Definitions............................................................  1

2.  Credit Facility........................................................  1

3.  Letter of Credit.......................................................  3

4.  Drafts Under the Letter of Credit......................................  4

5.  Letter of Credit Fee...................................................  4

6.  Letter of Credit Provisions............................................  4

7.  Maturity Date..........................................................  7

8.  Use of Proceeds and Maximum Amount Available...........................  7

9.  Advances under the Credit Facility.....................................  9

10. Condition to Advances..................................................  9

11. Readvances............................................................. 10

12. Additional Properties.................................................. 11

13. Loan to Value Requirement.............................................. 12

14. Updated Appraisals..................................................... 12

15. Collateral............................................................. 12

16. Sale of Property....................................................... 13

17. New Debt or Equity Offering............................................ 14

18. Restrictions on Transfer and Further Encumbrance....................... 14

19. Commitment Fee......................................................... 15

20. Administrative Fees.................................................... 15

21. Fee on Unused Portion of Credit Facility............................... 15

22. Representations and Warranties......................................... 15

23. Covenants.............................................................. 22

24. Recourse Obligations................................................... 35

25. Syndication of Credit Facility......................................... 35

26. Interest Rate Protection Agreements.................................... 37

27. Right of Entry......................................................... 38

28. Books and Records...................................................... 38

29. Taxes.................................................................. 39

30. Insurance Coverage..................................................... 40

31. Condemnation........................................................... 44

32. Environmental Provisions............................................... 45

33. Estoppel Certificates.................................................. 48
<PAGE>   3
                                                                           Page
                                                                           ----

34. Non-Waiver............................................................. 48

35. Sole Discretion........................................................ 49

36. Absolute and Unconditional Obligation.................................. 49

37. Relationship........................................................... 49

38. Anti-Forfeiture........................................................ 49

39. Deposits............................................................... 50

40. Submission to Jurisdiction............................................. 50

41. Retention of Counsel and Consultants................................... 51

42. Waiver of Notice....................................................... 51

43. Events of Default...................................................... 51

44. Application of Moneys.................................................. 54

45. Right to Cure Defaults................................................. 55

46. Further Assurances..................................................... 55

47. Costs and Expenses..................................................... 55

48. Indemnification of Agent and Co-Lenders................................ 55

49. Construction of Agreement.............................................. 55

50. Parties Bound, etc..................................................... 56

51. Complete Agreement..................................................... 56

52. Governing Law.......................................................... 56

53. Severability........................................................... 56

54. Notices................................................................ 56

55. Modification........................................................... 57

56. Waivers................................................................ 57

57. WAIVER OF TRIAL BY JURY................................................ 57

58. Borrowers' Reliance on Agent's Authority............................... 57

59. Authorized Representatives of BRT...................................... 58

60. Exculpation............................................................ 58


Exhibit A        Definitions
Exhibit B        Credit Facility Payment Provisions
Exhibit C        Form of Credit Facility Note
Exhibit D        Form of Request for Advance under Credit Facility
Exhibit E        Conditions for Inclusion of Additional Properties
Exhibit F        Initial Properties
Exhibit G        Form of Mortgage
Exhibit H        Form of Deed of Trust
Exhibit I        Form of Assignment of Leases and Rents


                                      -ii-
<PAGE>   4
Exhibit J        Form of Guaranty of Payment
Exhibit K        Form of Hazardous Material Guaranty and Indemnification
                 Agreement
Exhibit L        Form of Co-Lenders Certificate
Exhibit M        Form of Operating Statements
Exhibit N        Form of Financial Statements
Exhibit O        Form of Operating Budgets
Exhibit P        Quarterly Individual and Consolidated Operating Statements
Exhibit Q        Insurance Requirements


Schedule 1       Litigation
Schedule 2       Space Leases
Schedule 3       Other Leases
Schedule 4       Immediate Repairs
Schedule 5       Environmental Reports for Initial Properties


                                    -iii-
<PAGE>   5
                           REVOLVING CREDIT AGREEMENT


            THIS REVOLVING CREDIT AGREEMENT made as of the 25th day of November,
1996, among SMITH BARNEY MORTGAGE CAPITAL GROUP, INC. ("Smith Barney"), a
Delaware corporation having an office at 390 Greenwich Street, New York, New
York; NATIONSBANK, N.A. ("NationsBank"), a national banking corporation having
an office at 8300 Greensboro Drive, McLean, Virginia, acting in its individual
capacity (Smith Barney and NationsBank are hereinafter collectively referred to
as "Initial Co-Lenders"); BRANDYWINE REALTY TRUST ("BRT"), a Maryland real
estate investment trust having an office at Newtown Square Corporate Campus, 16
Campus Boulevard, Suite 150, Newtown Square, Pennsylvania; BRANDYWINE OPERATING
PARTNERSHIP, L.P. ("BOP"), a Delaware limited partnership having an office at
Newtown Square Corporate Campus, 16 Campus Boulevard, Suite 150, Newtown Square,
Pennsylvania; LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a Pennsylvania limited
partnership; NICHOLS LANSDALE LIMITED PARTNERSHIP III, a Pennsylvania limited
partnership; NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania limited partnership;
C/N OAKLANDS LIMITED PARTNERSHIP I, a Pennsylvania limited partnership; FIFTEEN
HORSHAM, L.P., a Pennsylvania limited partnership; C/N LEEDOM LIMITED
PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN LIMITED
PARTNERSHIP III, a Pennsylvania limited partnership; all having offices c/o
Brandywine Realty Trust, Newtown Square Corporate Campus, 16 Campus Boulevard,
Suite 150, Newtown Square, Pennsylvania (collectively, the BRT/BOP Limited
Partnerships) (BRT, BOP and the BRT/BOP Limited Partnership are hereinafter
collectively referred to as "Borrowers"); and NATIONSBANK, N.A., a national
banking association having an office at 8300 Greensboro Drive, McLean, Virginia,
acting in its capacity as administrative and documentation agent (NationsBank,
N.A., acting in its capacity as administrative and documentation agent, or any
successor administrative and documentation agent being so designated being
hereinafter referred to as "Agent").

                              PRELIMINARY STATEMENT

            Co-Lenders have agreed on the terms, covenants and provisions of
this Agreement hereinafter set forth to extend to Borrowers a revolving credit
facility in the principal sum of up to, but not in excess of, $80,000,000 (the
"Credit Facility").

            NOW, THEREFORE, in consideration of Ten Dollars ($10.00) and other
good and valuable consideration, the receipt of which is hereby acknowledged,
and to induce Co-Lenders to extend the Credit Facility, Borrowers hereby
represent and warrant to and covenant and agree with Co-Lenders as follows:

            1.  Definitions.  All capitalized terms as used in this Agreement
shall, unless otherwise defined in this Agreement, have the meanings given to
such terms in EXHIBIT A attached hereto.

            2.  Credit Facility.  The Credit Facility shall be advanced and
readvanced by Co-Lenders to Borrowers in accordance with the provisions of
this Agreement hereinafter set forth, and shall be evidenced by, and payable,
together with interest thereon, in accordance with the provisions of the
<PAGE>   6
Credit Facility Notes and EXHIBIT B attached hereto. Except as specifically
provided for to the contrary in the Co-Lenders Agreement from time to time, the
Credit Facility Notes (the basic form of which is attached hereto as EXHIBIT C)
shall be secured on a pari passu basis with each other inter alia by the
Mortgages and the Assignments of Leases and Rents. Payments under the Credit
Facility must be received by Agent prior to 12:00 noon, Charlotte, North
Carolina time, for Borrowers to receive credit for such payment that day. The
respective undivided percentage interests (the "Credit Facility Percentage
Interests") held by each Co-Lender in the Credit Facility (inclusive of risk
participations in any Letter of Credit which is issued and is outstanding under
the Credit Facility) on the date of this Agreement are as follows:

<TABLE>
<CAPTION>
                                      Amount    Percentage Interest
                                    ----------- -------------------
<S>                                 <C>               <C>
            Smith Barney            $40,000,000       50%
            NationsBank             $40,000,000       50%
</TABLE>

Each Co-Lender shall be obligated to fund a portion of each advance made under
the Credit Facility in accordance with the provisions of this Agreement which is
equal to the amount of each such advance multiplied by such Co-Lender's
undivided Credit Facility Percentage Interest. Borrowers expressly acknowledge
and agree that (i) each Co-Lender directly assumes the obligation to fund, and
shall have the sole obligation to fund, its Credit Facility Percentage Interest
in each advance of the Credit Facility which is made, or required to be made, by
Co-Lenders in accordance with the provisions of this Agreement, (ii) the
obligations and liabilities of Co-Lenders in respect of the Credit Facility are
several obligations and liabilities and not joint and several obligations and
liabilities of Co-Lenders, (iii) Borrowers shall not have the right under any
fact or circumstance to look to any other party, including, without limitation,
any other Co-Lender, for the funding of the portion of the Credit Facility which
is required to be funded by a particular Co-Lender in accordance with the
provisions of this Agreement if such Co-Lender shall default in doing so, all
risk of such default being assumed in all respects by Borrowers, (iv) the
respective rights and obligations of Co-Lenders vis-a-vis one another
(including, without limitation, voting and approval rights), shall be as set
forth in the Co-Lenders Agreement, and (v) Borrowers shall not have the right to
examine or receive a copy of the Co-Lenders Agreement. Subject to the terms and
provisions contained therein, the Co-Lenders Agreement provides, among other
things, that (A) without the unanimous consent of Co-Lenders, (i) no Collateral
may be released other than in accordance with the express provisions of the
Credit Facility Documents, (ii) neither Borrowers nor any Guarantor may be
released from liability under the Credit Facility Documents, (iii) neither the
interest rate nor any other fees or charges payable under the Credit Facility
Documents may be changed or modified and (iv) no Credit Facility Documents may
be modified, (B) the acceptance of Additional Property for inclusion in the
collateral pool for the Credit Facility requires the unanimous approval of
Co-Lenders, and (C) Agent has (i) the authority to authorize releases of
Collateral in accordance with the express provisions of the Credit Agreement,
and (ii) the authority to authorize the making of advances and the issuance of
Letters of Credit in accordance, and upon compliance by Borrowers, with the
provisions of the Credit Agreement pertaining thereto. Borrowers acknowledge and
agree that (i) the voting and approval rights of Co-Lenders and the authority of
Agent described in the preceding sentence are for illustrative purposes only and
do not constitute a complete or exhaustive list of decisions upon which
Co-Lenders may exercise voting and approval rights, or of the authority of
Agent, in respect of the Credit Facility; provided, however, that Borrowers
shall have the right to rely on the advice of Agent as to any action taken or
not taken by Co-Lenders or as to any approval given or not given by Co-Lenders
or as to the authority of Agent, all as more particularly set forth in paragraph
58 of this Agreement, (ii) the aforesaid voting and approval rights of
Co-Lenders and authority of Agent may at any time subsequent to the closing


                                        2
<PAGE>   7
of the Credit Facility (and without prior notice to or approval by Borrowers) be
modified by Co-Lenders either (x) in accordance with the provisions of the
Co-Lenders Agreement, or (y) otherwise in the sole and absolute discretion of
Co-Lenders, and to the extent pertaining to Agent, with the approval of Agent,
and (iii) Borrowers shall in no event or under any circumstances have any right
to review, approve or consent to any modification or amendment to the Co-Lenders
Agreement, all of which may be made without any notice to or approval by
Borrowers, in the sole and absolute discretion of Co-Lenders. Agent shall
promptly inform Borrowers of any such change in the voting and approval rights
of Co-Lenders or in the authority of Agent, it being agreed that (i) any failure
by Agent to so notify Borrowers shall not prevent any such change in voting and
approval rights of Co-Lenders or in the authority of Agent from becoming
effective, and (ii) neither Agent nor Co-Lenders shall in any event have any
liability of any nature whatsoever to Borrowers for any failure by Agent to so
notify Borrowers. Borrowers acknowledge that it is Smith Barney's intention (in
consultation with NationsBank) to effect a further syndication of direct
interest in the portion of the Credit Facility held by Smith Barney and
NationsBank on the date of this Agreement pursuant to and in the manner
contemplated by paragraph 25 of this Agreement, and acknowledge that the
undivided Credit Facility Percentage Interest held by Smith Barney and
NationsBank on the date of this Agreement, and the provisions of this Agreement,
will be appropriately adjusted in accordance with the provisions of paragraph 25
of this Agreement to reflect any such further syndication of direct interests in
the Credit Facility which is concluded by Smith Barney after the date of this
Agreement, and to include the party to whom any such direct interest in the
Credit Facility is so transferred by Smith Barney as a Co-Lender under this
Agreement, all with the same force and effect as if such party was an original
Co-Lender under this Agreement.

            3. Letter of Credit. Contemporaneously with the closing of the
Credit Facility, NationsBank ("L/C Issuer") has extended for the account of
Borrowers a letter of credit facility (the "Letter of Credit Facility"), which
the Letter of Credit Facility is being extended under, and as a component of,
the Credit Facility and is included within, and is not in addition to, the
$80,000,000 maximum amount available under the Credit Facility. Each Co-Lender
shall have an undivided interest in each Letter of Credit which is issued under
the Letter of Credit Facility and in the obligation thereunder equal to its
Credit Facility Percentage Interest. Borrowers shall have the right, from time
to time, to request L/C Issuer to issue one or more unconditional and
irrevocable letters of credit for Borrowers' account (each a "Letter of
Credit"), subject to the terms and conditions of this paragraph hereinafter set
forth:

                        (i) Each request for the issuance of a Letter of Credit
            shall be in writing, shall state the requested date of issuance of
            the Letter(s) of Credit (which shall be at least five (5) business
            days after the request is received by L/C Issuer), shall state the
            requested amount of the Letters(s) of Credit and the purposes for
            which the Letter(s) of Credit are requested (which purposes shall be
            limited to the purposes set forth in clause (vi) of the first
            sentence of paragraph 8 of this Agreement), shall indicate the
            beneficiary of the Letter(s) of Credit, and shall specify the terms
            of the Letter(s) of Credit (which terms shall be satisfactory to L/C
            Issuer), it being agreed that in no event or under any circumstances
            shall L/C Issuer be obligated or required to issue under the Letter
            of Credit Facility a so-called "evergreen letter of credit" or any
            letter of credit which is subject to any form of automatic renewal.

                        (ii)  Each Letter of Credit shall be in an amount of
            not less than $100,000.


                                        3
<PAGE>   8
                        (iii) At no time during the term of the Credit Facility
            shall there be more than five (5) Letters of Credit in the aggregate
            outstanding, unless otherwise agreed to by L/C Issuer in its sole
            discretion.

                        (iv) No Letter of Credit shall have an expiration date
            beyond November 15, 1998.

                        (v) In no event shall the aggregate of the Principal
            Balance outstanding under the Credit Facility pursuant to the
            clauses (iv) and (v) of the first sentence of paragraph 8 of this
            Agreement, and the amount available for draw under outstanding
            Letter of Credit at any time during the term of the Credit Facility
            exceed $10,000,000.

                        (vi) L/C Issuer shall have the sole obligation to issue
            Letter(s) of Credit under this Agreement, and Borrowers shall not
            have the right under any fact or circumstance to look to any other
            party, including, without limitation, any other Co-Lender, for the
            issuance of the Letter(s) of Credit if L/C Issuer defaults in doing
            so, all such risk of default being assumed by Borrowers.

            4. Drafts Under the Letter of Credit. Any draw honored by L/C Issuer
under a Letter of Credit shall constitute an automatic advance under the Credit
Facility and shall be evidenced by and payable, together with interest thereon,
in accordance with the provisions of the Credit Facility Notes and EXHIBIT B
attached hereto. Upon request of L/C Issuer, each of the other Co-Lenders will
fund their respective undivided Credit Facility Percentage Interests in each
such advance under the Credit Facility which is made as a result of a draw under
a Letter of Credit.

            5. Letter of Credit Fee. Borrowers shall pay to L/C Issuer a letter
of credit fee (the "Letter of Credit Fee") calculated and payable in the manner
hereinafter set forth in this paragraph. The Letter of Credit Fee payable by
Borrowers to L/C Issuer with respect to any Letter of Credit which is issued
under the Letter of Credit Facility shall be paid in full on the date of
issuance of such Letter of Credit and as a condition precedent to issuance of
such Letter of Credit, shall be deemed earned in full on payment and shall not
be subject to refund in whole or in part, and shall be equal to (1.875%)
multiplied by (a fraction, the numerator of which shall be equal to the actual
number of days from and including the date of issuance of such Letter of Credit
to, but not including, the stated expiration date of such Letter of Credit, and
the denominator of which shall be 360). Any extension or renewal of a Letter of
Credit shall be deemed the issuance of a new Letter of Credit. L/C Issuer shall
be entitled to retain for its own account, in its capacity as L/C Issuer, 6.667%
of the Letter of Credit Fee payable with respect to each Letter of Credit which
is issued under the Letter of Credit Facility, and shall cause Agent to
distribute the remaining 93.333% of each such Letter of Credit Fee to each
Co-Lender (inclusive of NationsBank) ratably in accordance with their respective
Credit Facility Percentage Interests. The obligation of Borrowers to pay the
Letter of Credit Fee to L/C Issuer pursuant to the provisions of this paragraph
shall be secured by the Mortgages. The Letter of Credit Fee shall constitute
part of the Debt.

            6.  Letter of Credit Provisions.  Borrowers agree with L/C Issuer
that the following provisions of this paragraph shall be in effect with
respect to the Letter(s) of Credit:

                        (a) It is understood that the cost to L/C Issuer of
            maintaining its commitments under the Letter(s) of Credit may
            fluctuate as a result of the implementation, or subsequent


                                        4
<PAGE>   9
            increase, of reserve requirements on the Letter(s) of Credit by the
            Board of Governors of the Federal Reserve System of the United
            States, including, but not limited to, reserve requirements under
            Regulation D of such Board of Governors as now and from time to time
            in effect ("Regulation D"). Borrowers agree to pay to L/C Issuer,
            from time to time as hereinafter provided, such amounts as shall be
            necessary to compensate L/C Issuer for the portion of the cost
            actually incurred by L/C Issuer in maintaining its commitments under
            the Letter(s) of Credit resulting from the imposition, or any
            subsequent increase, in either case after the date of this
            Agreement, of such reserve requirements on the Letter(s) of Credit,
            it being understood that the Letter of Credit Fees and other sums
            payable by Borrowers in connection with the issuance of the
            Letter(s) of Credit have been determined on the basis of existing
            reserve requirements. In the event that any change in applicable
            law, regulation, condition, directive or interpretation thereof
            (including any request, guideline or policy whether or not having
            the force of law and including, without limitation, Regulation D) by
            any authority charged with the administration or interpretation
            thereof occurs after the date of this Agreement which:

                        (i) subjects L/C Issuer to any tax with respect to its
                  commitments under the Letter(s) of Credit (other than any tax
                  measured by or based upon the overall net income of L/C
                  Issuer); or

                        (ii) changes the basis of taxation of any amount paid or
                  payable to L/C Issuer in connection with the Letter(s) of
                  Credit (other than any tax measured by or based upon the
                  overall net income of L/C Issuer); or

                        (iii) imposes, modifies, increases or deems applicable
                  any reserve requirements with respect to the Letter(s) of
                  Credit; or

                        (iv) imposes upon L/C Issuer any other condition with
                  respect to any amount paid or payable to L/C Issuer in
                  connection with the Letter(s) of Credit; and the result of any
                  of the foregoing is to actually increase the cost to L/C
                  Issuer of maintaining its commitments under the Letter of
                  Credit, or to actually reduce the amount of any payment
                  receivable by L/C Issuer with respect to the Letter(s) of
                  Credit, or to actually require L/C Issuer to make any payment
                  on or calculated by reference to the gross amount of any sum
                  received by it with respect to the Letter(s) of Credit, in
                  each case by an amount which L/C Issuer in its sole judgment
                  deems material, then and in any such case:

                              (1)  L/C Issuer shall promptly notify Borrowers
                        in writing of the happening of such event;

                              (2) L/C Issuer shall promptly deliver to Borrowers
                        a certificate stating the change which has occurred or
                        the reserve requirements or other conditions which have
                        been imposed on L/C Issuer or the request, direction or
                        requirement with which it has complied, together with
                        the date thereof, the amount of such actual increased
                        cost, reduction or payment and the way in which such
                        amount has been calculated; and


                                        5
<PAGE>   10
                              (3) Borrowers shall pay to L/C Issuer, within ten
                        (10) days after delivery of the certificate referred to
                        in clause (2) above, such amount or amounts as will
                        compensate L/C Issuer for such additional cost,
                        reduction or payment.

The certificate of L/C Issuer as to any additional amount or amounts payable by
Borrowers pursuant to this subparagraph, which shall be calculated in a good
faith, nondiscriminatory manner, shall be conclusive evidence of the amount
thereof, absent manifest error. The protection of this subparagraph shall be
available to L/C Issuer regardless of any possible contention of invalidity or
inapplicability of the law, regulation or condition which has been imposed. In
no event or under any circumstance shall L/C Issuer be obligated to reduce the
Letter of Credit Fees or other sums payable hereunder as a result of any
reduction after the date hereof in the costs incurred by L/C Issuer in
maintaining its commitments under the Letter(s) of Credit (including, without
limitation, any reduction in applicable reserve requirements).

                        (b) It is understood that L/C Issuer's commitment to the
            beneficiary under the Letter(s) of Credit are obligations separate
            and distinct from such beneficiary's obligations, if any, to
            Borrowers. Accordingly, should Borrowers obtain an injunction,
            attachment or other order or decree from any court which prohibits
            L/C Issuer from honoring draws made under any Letter of Credit, or
            otherwise reimbursing itself for payments made under any Letter of
            Credit, Borrowers shall pay any and all expenses which L/C Issuer
            may incur on account of such Letter of Credit (including reasonable
            attorneys' fees), or otherwise reimbursing itself for payments made
            under such Letter of Credit, together with interest thereon at the
            Default Rate. This right shall be in addition to any other rights
            L/C Issuer may have at law or in equity.

                        (c) L/C Issuer shall exercise the standard of care in
            dealing with the Letter(s) of Credit as is set forth in the Uniform
            Customs and Practice for Documentary Credits (1993 Revision),
            International Chamber of Commerce Publication No. 500. Borrowers
            agrees that any action taken or not taken by L/C Issuer or by any
            correspondent of L/C Issuer under or in connection with the
            Letter(s) of Credit consistent with the standards set forth in such
            Publication, shall be binding on Borrowers and shall not put L/C
            Issuer or its correspondents under any resulting liability to
            Borrowers.

                        (d) In case of any variation between the documents
            called for by the Letter(s) of Credit or Borrowers' instructions and
            documents accepted by L/C Issuer, Borrowers shall be conclusively
            deemed to have waived any right to object to such variation with
            respect to any action of L/C Issuer relating to such documents, and
            to have ratified and approved such action as having been taken at
            Borrowers' direction, unless promptly after receipt of such
            documents or acquisition of actual knowledge of such variation (but
            in no event later than five (5) business days after receipt or
            acquisition of actual knowledge), Borrowers files written objection
            with L/C Issuer.

                        (e) Borrowers agree to indemnify L/C Issuer and to hold
            L/C Issuer harmless from and against any and all claims, damages,
            losses, liabilities, costs or expenses of any nature whatsoever
            which L/C Issuer may incur or suffer by reason of or in connection
            with the execution and delivery of or payment under any Letter of
            Credit other than any such claims, damages, losses,


                                        6
<PAGE>   11
            liabilities, costs or expenses caused by (i) the willful misconduct
            or gross negligence of L/C Issuer in performing its obligations
            under this Agreement and the Letter(s) of Credit, (ii) L/C Issuer's
            making payment against any draft presented under a Letter of Credit
            which do not strictly comply with the terms of such Letter of
            Credit, or (iii) L/C Issuer's failure to make timely payment against
            any draft presented under a Letter of Credit in compliance with the
            terms of such Letter of Credit, it being agreed that in making
            payment under a Letter of Credit L/C Issuer's exclusive reliance
            (absent willful misconduct or gross negligence) on the documents
            presented to L/C Issuer in accordance with the provisions of such
            Letter of Credit as to any and all matters set forth therein,
            whether or not any statement or any document presented pursuant to
            any such Letter of Credit proves to be forged, fraudulent, invalid
            or insufficient in any respect or any statement therein proves to be
            untrue or inaccurate in any respect whatsoever shall not relieve
            Borrowers of their obligations to indemnify L/C Issuer pursuant to
            this subparagraph. Borrowers shall, upon demand by L/C Issuer,
            reimburse L/C Issuer for any expenses incurred by L/C Issuer in
            connection with investigating or defending against any of the
            foregoing (including reasonable legal fees) except if the same is
            due to L/C Issuer's gross negligence or willful misconduct. The
            indemnities contained in this subparagraph shall, notwithstanding
            anything to the contrary contained in this Agreement, survive (i)
            the expiration of the Letter(s) of Credit and (ii) the payment of
            the Debt in full. Nothing contained in this subparagraph (e) shall
            be deemed to constitute a waiver by Borrowers of any rights or
            remedies Borrowers shall have at law, in equity or otherwise as a
            result of L/C Issuer's willful misconduct or gross negligence.

                        (f) Upon the occurrence of an Event of Default and for
            so long as such Event of Default shall continue, Co-Lenders or Agent
            shall have the absolute and unconditional right to demand that
            Borrowers deposit, in a non-interest bearing cash collateral account
            with Agent an amount equal to the face amount of all outstanding
            Letter(s) of Credit, and Borrowers upon such demand shall
            immediately make such deposit, it being expressly understood that
            the obligation of Borrowers to make such deposit is secured by the
            Mortgages and the other Credit Facility Documents, and Co-Lenders
            shall have the absolute right to enforce its remedies under the
            Mortgages and the other Credit Facility Documents, including,
            without limitation, foreclosure of the Mortgages to enforce the
            performance of Borrowers's obligation hereunder. All sums deposited
            by Borrowers pursuant to the provisions of this subparagraph shall
            not bear interest and shall constitute additional security for the
            payment of the Debt. The balance, if any, of any such deposit
            remaining after payment in full of the Debt shall be paid to
            Borrowers or as may otherwise be directed by a court of competent
            jurisdiction.

            7. Maturity Date. The Credit Facility shall mature and shall be
payable in full on December 1, 1998 (the "Maturity Date"). Co-Lenders shall have
no obligation to make any advance under the Credit Facility subsequent to
November 15, 1998, and L/C Issuer shall have no obligation to issue any Letter
of Credit subsequent to September 1, 1998.

            8. Use of Proceeds and Maximum Amount Available. The Credit Facility
shall be available (i) to refinance Additional Properties which are from time to
time added to the collateral pool for the Credit Facility in accordance with the
provisions of this paragraph and paragraph 11 of this Agreement, (ii) to finance
the acquisition by Borrowers of Additional


                                        7
<PAGE>   12
Properties, (iii) to finance in accordance with the provisions of this Agreement
the Development and the further Development of unimproved land and improved
properties owned and/or controlled either directly or indirectly by Borrowers
(irrespective of whether constituting part of the collateral pool for the Credit
Facility), provided that (x) Borrowers retain at all times in the opinion of
Co-Lenders sufficient availability under the Credit Facility to fund all costs
remaining to be paid in connection with the completion and stabilization of the
improvements which are the subject of all such Developments from time to time,
which availability under the Credit Facility will be reserved to cover the
payment of such costs and will not be advanced for any other purpose until such
costs have been paid in full, (y) Borrowers shall prior to the commencement of
any such Development submit a comprehensive description and budget therefor to
Co-Lenders, which budget and the nature and scope of such Development shall be
subject to approval by Co-Lenders prior to the commencement of such Development,
(iv) to finance the Renovation of, and capital improvements required with
respect to, properties owned and/or controlled either directly or indirectly by
Borrowers (irrespective of whether constituting part of collateral pool for the
Credit Facility), (v) for general trust, corporate and partnership purposes of
Borrowers, and (vi) for the issuance of Letters of Credit required by Borrowers
in the course of their general operation and business, provided, however, that
(A) the aggregate of the Principal Balance outstanding under the Credit Facility
pursuant to clauses (iv) and (v) of this sentence, and the amount available for
draw under outstanding Letter of Credit shall at no time during the term of
Credit Facility exceed $10,000,000, and (B) the aggregate of the Principal
Balance outstanding under the Credit Facility, and the amount available for draw
under outstanding Letter of Credit shall at no time during the term of the
Credit Facility exceed the maximum amount available under the Credit Facility
from time to time in accordance with the provisions of this Agreement (the
aggregate of the Principal Balance outstanding from time to time under the
Credit Facility, and the amount available for draw under outstanding Letters of
Credit from time to time is herein referred to as the "Credit Facility
Outstanding"). Any draw made under an outstanding Letter of Credit shall
constitute an automatic and mandatory advance under the Credit Facility which
shall be evidenced by the Credit Facility Notes and secured inter alia by the
Mortgages and the Assignments of Leases and Rents. The inclusion of Additional
Properties in the collateral pool for the Credit Facility shall be at the option
of Borrowers, and the acceptance of the same for inclusion in the Credit
Facility shall be subject to satisfaction of the conditions set forth in
paragraph 11 of this Agreement. Each time there is a change in the maximum
amount available under the Credit Facility as a result of the satisfaction of
the appraisal requirements pertaining to an Initial Property pursuant to
paragraph 10(iv) of this Agreement, the acceptance and inclusion of an
Additional Property as part of the collateral pool for the Credit Facility in
accordance with the provision of paragraph 12 of this Agreement, the release of
a Property constituting part of the collateral pool for the Credit Facility in
accordance with the provisions of paragraph 16 of this Agreement upon the sale
thereof, a reduction in the outstanding Principal Balance of the Credit Facility
in order to restore compliance with one or more of the financial covenants set
forth in paragraph 13 and paragraph 23 of this Agreement, or as a result of any
other fact or circumstance or the application of any other provisions set forth
in this Agreement or the other Credit Facility Documents, Agent shall prepare
(on behalf of Co-Lenders) and shall deliver to Co-Lenders and Borrowers a
statement setting forth the change in the maximum amount available under the
Credit Facility and the manner in which such change and such adjusted maximum
amount available under the Credit Facility were calculated, which statement
shall be promptly acknowledged and confirmed by Borrowers and Co-Lenders, shall
be conclusive and binding upon Borrowers absent manifest error, and shall remain
in effect until the next such statement is prepared and circulated by Agent.


                                        8
<PAGE>   13
            9. Advances under the Credit Facility. Co-Lenders shall not be
obligated to make an advance under the Credit Facility unless Co-Lenders are
satisfied that the conditions precedent for the making of such advance under the
Credit Facility as set forth in this Agreement and the other Credit Facility
Documents have been satisfied. Borrowers shall not have the right (other than as
provided in the next sentence) to obtain more than one advance per month under
the Credit Facility. Notwithstanding the foregoing, Borrowers shall have the
right to obtain more than one advance under the Credit Facility per month if
such additional advance is being made solely in connection with the acquisition
of an Additional Property. Each request by Borrowers for an advance under the
Credit Facility shall be in writing to Agent, shall specify the purposes for
which such advance is requested (which purposes shall be limited to the
permitted purposes set forth in paragraph 8 of this Agreement), shall in each
case be signed by a duly authorized representative of Borrowers and shall be in
the form attached hereto as EXHIBIT D (a "Request for Advance"). Each Request
for Advance shall be delivered to Agent not less than five (5) business days
prior to the date upon which such advance is requested. Co-Lenders shall not be
obligated to make an advance under the Credit Facility unless Borrowers have
delivered, or caused to be delivered, to Agent a Request for Advance at least
five (5) business days prior to the date upon which such advance is requested.
The issuance of a Letter of Credit in accordance with the provisions of this
Agreement shall be deemed to constitute an advance under the Credit Facility for
the purposes of this Agreement.

            10.  Condition to Advances.  Co-Lenders' obligation to make each
advance under the Credit Facility shall be subject to satisfaction of each of
the following additional conditions:

                        (i) No default shall have occurred and shall be
            continuing under the Credit Facility Documents.

                        (ii) All affirmative and negative covenants and
            representations and warranties contained in this Agreement and the
            other Credit Facility Documents and all of the other terms,
            covenants and conditions contained in the Credit Facility Documents
            shall continue to be complied with both before and after the making
            of each advance under the Credit Facility.

                        (iii) Agent shall be satisfied that each of the title
            insurance policies insuring the respective liens of the Mortgages
            will subsequent to the making of each advance under the Credit
            Facility (inclusive of the issuance of any Letters of Credit)
            continue to insure the respective liens of the Mortgages as first
            liens (subject only to the Permitted Title Exceptions) on each of
            the Properties constituting part of the collateral pool for the
            Credit Facility for an amount equal to the Credit Facility
            Outstanding after the making of each such advance under the Credit
            Facility, it being the intent that the respective liens of the
            Mortgages will at all times be insured as first liens on the
            Properties from time to time constituting part of the collateral
            pool for the Credit Facility for an amount which is at all times at
            least equal to the Credit Facility Outstanding from time to time and
            subject only to the Permitted Title Exceptions. In this regard,
            Borrowers shall be obligated as a condition precedent to each
            advance under the Credit Facility to deliver to Agent such
            continuations of title and endorsement to the title insurance
            policies insuring the respective liens of the Mortgages as may be
            reasonably required by Co-Lenders to evidence compliance with the
            provisions of this subparagraph. In making their determination as to
            the necessity of requiring such continuations of title and
            endorsements to the title insurance policies insuring the liens of
            the Mortgages, Co-Lenders will take into account the laws of the


                                        9
<PAGE>   14
            jurisdiction in which the Properties are located insofar as they
            pertain to the priority of the liens of Mortgages securing revolving
            credit loans over intervening liens, and whether such title policies
            as originally issued have acceptable revolving credit endorsements
            which insure the priority of future advances under the Credit
            Facility over intervening liens. Co-Lenders acknowledge that the
            title policies insuring the respective liens of the Mortgages
            covering the Initial Properties contain satisfactory revolving
            credit endorsements, and that in the absence of a change in
            applicable law or the occurrence in the opinion of Co-Lenders of any
            other material circumstance or event, Co-Lenders will not require
            date down endorsements with respect to these title insurance
            policies as a condition precedent to the making of advances under
            the Credit Facility, but do reserve the right to require
            continuation of title as a condition precedent to making such
            advance.

                        (iv) Borrowers acknowledge and agree that as of the date
            of this Agreement, Co-Lenders have not received final appraisals
            with respect to any of the Initial Properties, and, as a result,
            Co-Lenders are not obligated to make any advances under the Credit
            Facility in accordance with the provisions of this Agreement.
            Borrowers shall cause to be delivered to Co-Lenders not later than
            December 31, 1996, final "as is" appraisals with respect to the
            Properties in conformity with the requirements concerning appraisals
            generally, as set forth in paragraph 1(m) of EXHIBIT E attached
            hereto. As the appraised values of the Initial Properties, as set
            forth in such appraisals are approved by Co-Lenders (with or without
            downward adjustment, as the case may be) the amount available under
            the Credit Facility will be adjusted upward to reflect those of the
            Initial Properties with respect to which appraised values have been
            approved by Co-Lenders from time to time (with or without downward
            adjustment, as the case may be).


                        (v) All of the other terms and conditions set forth in
            this Agreement and the other Credit Facility Documents pertaining to
            advances of the Credit Facility shall have been satisfied.

            11. Readvances. The Credit Facility is intended to be a revolving
credit facility. In this regard, it is understood that Borrowers shall have the
right upon compliance with the conditions of this Agreement and the other Credit
Facility Documents which pertain to the making of advances under the Credit
Facility (including, without limitation, the requirement that all advances be
evidenced and secured by the Credit Facility Documents and insured under
acceptable title insurance policies) to obtain readvances of amounts from time
to time applied to the reduction of the outstanding Principal Balance of the
Credit Facility pursuant to the provisions of paragraphs 16, 17, 30 or 31 of
this Agreement, or otherwise required or permitted to be applied in reduction of
the outstanding Principal Balance of the Credit Facility in accordance with the
provisions of this Agreement or the other Credit Facility Documents (including,
without limitation, any portion of the outstanding Principal Balance of the
Credit Facility which is prepaid in accordance with the provisions of the Credit
Facility Notes and paragraph 10 of EXHIBIT B attached hereto). All sums which
are applied from time to time in reduction of the outstanding Principal Balance
of the Credit Facility in accordance with the provisions of this Agreement of
any of the other Credit Facility Documents shall (unless otherwise agreed to the
contrary by Borrowers) be deemed to have been applied first in reduction of
advances of the Credit Facility made pursuant to clauses (iv) and (v) of
paragraph 8 of this Agreement.


                                       10
<PAGE>   15
             12. Additional Properties. From time to time after the date hereof,
Borrowers shall have the right to request that one or more Additional Properties
be included in the collateral pool for the Credit Facility. If Borrowers wish to
submit an Additional Property for inclusion in the collateral pool for the
Credit Facility, Borrowers shall notify Agent in writing of their desire to do
so at least forty five (45) days prior to the date upon which Borrowers wish to
include such Additional Property in the collateral pool for the Credit Facility,
and shall at Borrowers' sole cost and expense cause all of the terms and
conditions of the Commitment which pertained to the inclusion of the Initial
Properties in the original collateral pool for the Credit Facility to be
satisfied with respect to the Additional Property, all with the same force and
effect as if the Additional Property had constituted part of the original
collateral pool for the Credit Facility (including, without limitation, the
terms and conditions more particularly set forth in EXHIBIT E attached hereto).
An Additional Property shall not be included in the collateral pool for the
Credit Facility unless (i) all of the aforesaid terms and conditions are met to
the satisfaction of Co-Lenders, (ii) the Additional Property shall in the
opinion of Co-Lenders be at least comparable in quality to the Initial
Properties constituting part of the original collateral pool for the Credit
Facility, (iii) all of the affirmative and negative covenants and all of the
representations and warranties contained in this Agreement and the other Credit
Facility Documents and all of the other terms, covenants and provisions of the
Credit Facility Documents shall continue to be complied with after the inclusion
of the Additional Property in the collateral pool for the Credit Facility, and
(iv) the inclusion of the Additional Property in the collateral pool for the
Credit Facility is otherwise approved by Co-Lenders holding in the aggregate not
less than 100% of the undivided Total Credit Facility Percentage Interests, it
being agreed that Co-Lenders shall in no event or under any circumstance have
any liability to Borrowers or any other person, party or entity as the result of
their decision not to accept an Additional Property for inclusion in the
collateral pool for the Credit Facility. In addition to the foregoing, if
Borrowers' interest in an Additional Property is a leasehold, such Additional
Property will not be accepted for inclusion in the collateral pool for the
Credit Facility unless the ground lease creating such leasehold estate is, in
the opinion of Co-Lenders, financeable and the terms of such ground lease shall
otherwise be approved by Co-Lenders. Agent shall inform Borrowers within fifteen
(15) days after submission by Borrowers of all of the Required Due Diligence
Materials for an Additional Property as to whether the Additional Property has
been approved for inclusion in the collateral pool for the Credit Facility by
Co-Lenders holding in the aggregate not less than 100% of the undivided Total
Credit Facility Percentage Interests. If an Additional Property is so approved
for inclusion in the collateral pool for the Credit Facility, the Appraised
Value of such Additional Property will be equal to the appraised value of the
Additional Property, as set forth in the appraisal obtained with respect to such
Additional Property pursuant to the provisions of paragraph 1(m) of EXHIBIT E
attached to this Agreement, if the fair market value of such Additional
Property, as set forth in such appraisal, is approved without adjustment by
Co-Lenders holding in the aggregate not less than two thirds (2/3) of the
undivided Total Credit Facility Percentage Interests. If the fair market value
of such Additional Property as set forth in such appraisal is approved with
downward adjustment in value by Co-Lenders holding in excess of one third (1/3)
of the undivided Total Credit Facility Percentage Interests, the Appraised Value
of such Additional Property shall be the Weighted Average Adjusted Appraised
Value of such Additional Property. The "Weighted Average Adjusted Appraised
Value" of such Additional Property shall be determined by Agent and shall be
equal to the weighted average (i.e., on the basis of the respective undivided
Total Credit Facility Percentage Interest held by each Co-Lender) of the fair
market value of such Additional Property, as respectively approved (with or
without adjustment, as the case may be) by each individual Co-Lender.


                                       11
<PAGE>   16
            13. Loan to Value Requirement. In no event will the aggregate Credit
Facility Outstanding at any given time during the term of the Credit Facility
exceed sixty percent (60%) of the aggregate Approved Value of the Properties
from time to time constituting part of the collateral for the Credit Facility
(the "Loan to Value Requirement"). The "Approved Value" of a particular Property
constituting part of the collateral pool for the Credit Facility (A) shall
during the first year of the inclusion of such Property in the collateral pool
for the Credit Facility be equal to the Appraised Value of such Property, as
determined by appraisal in accordance with the provisions of this Agreement, and
(B) shall subsequent to the first anniversary of the date of the inclusion of
such Property in the collateral pool for the Credit Facility be equal to the
Capitalization Rate Value of such Property. The "Capitalization Rate Value" of a
Property constituting part of the collateral pool for the Credit Facility shall
be equal to the aggregate Cash Flow of such Property for the four calendar
quarters preceding the date of each determination of the Capitalization Rate
Value of such Property divided by a capitalization rate of 10.5%. "Cash Flow" of
a particular Property constituting part of the collateral pool for the Credit
Facility for any given four calendar quarters shall mean the earnings (i.e.,
gross revenues less expenses) of such Property (based upon GAAP) for such four
calendar quarters before depreciation, amortization, interest expense and income
taxes less an annual capital and leasing reserve of fifty cents ($.50) per
square foot, it being understood that in determining the expenses of such
Property the management fees for such Property shall be deemed for the purposes
of this calculation to be the higher of actual management fees for such period
of time or three percent (3%) of the gross revenues of such Property for such
four calendar quarters. If at any time the Loan to Value Requirement shall cease
to be satisfied, Borrowers shall within ten (10) business days after demand by
Agent either (i) pay the outstanding Principal Balance of the Credit Facility
down by an amount sufficient to restore compliance with the Loan to Value
Requirement, or (ii) deliver to Agent additional collateral for the Credit
Facility consisting of unencumbered improved property which is satisfactory in
all respects to Co-Lenders and sufficient in the opinion of Co-Lenders to
restore compliance with the Loan to Value Requirement.

            14. Updated Appraisals. Co-Lenders shall have the right in their
discretion to commission updated appraisals or interim valuations with respect
to the Properties from time to time constituting part of the collateral pool for
the Credit Facility (i) with respect to a particular Property, if Co-Lenders, in
the exercise of their sole and absolute discretion, believes that there has been
a material reduction in the value of such Property (including, without
limitation, by reason of fire or other casualty or by reason of condemnation)
and (ii) upon the occurrence of an Event of Default and for so long as any such
Event of Default shall continue. All costs incurred in connection with any
updated appraisal or interim valuation required under this paragraph shall be
borne by Borrowers, shall be paid by Borrowers within ten (10) days after
request by Agent, and shall constitute part of the Debt. The obligation of
Borrowers to pay the aforementioned appraisal costs pursuant to this paragraph
shall be secured by the Mortgages and the other Credit Facility Documents.

            15. Collateral. The Credit Facility Notes shall be secured on a pari
passu basis with each other inter alia by the Mortgages and the Assignments of
Leases and Rents. Each Mortgage shall be substantially in the form of the
mortgage or deed of trust attached hereto as EXHIBITS G and H respectively, and
each Assignment of Leases and Rents shall be substantially in the form attached
hereto as EXHIBIT I, with such changes therein as may be necessary (i) to
reflect the interests in the Property or other Collateral to be encumbered
thereby and the ownership thereof, (ii) to adapt the same to the laws of the
particular jurisdiction in which the Property or other Collateral to be
encumbered thereby is located, and (iii) to reflect the specific terms and
conditions which are applicable thereto, including, without limitation,


                                       12
<PAGE>   17
any necessary changes as may be reasonably required by Co-Lenders.
Notwithstanding anything to the contrary contained in this Agreement, it is
understood that the portion of the principal balance of the Credit Facility
secured by a Mortgage covering a Property which is located in a state with a
substantial mortgage recording, stamp, documentary, intangible or other
comparable tax (and which does not permit allocation of debt secured by blanket
mortgages and deeds of trust in multi-state transactions) will be limited to an
amount equal to 125% of the Appraised Value of such Property. Any Mortgage which
is limited in principal amount secured in accordance with the provisions of the
preceding sentence shall otherwise secure one hundred (100%) percent of all
interest and sums (other than principal) which may or shall become due and
payable in respect of the Credit Facility in accordance with the provisions of
the Credit Facility Documents. In addition to the foregoing, and as a condition
precedent to the closing of the Credit Facility, (i) Guarantors shall execute
and deliver the Guaranty of Payment in the form of EXHIBIT J attached hereto,
and (ii) Borrowers and Guarantors shall execute and deliver the Hazardous
Material Guaranty and Indemnification Agreement in the form of EXHIBIT K
attached hereto.

            16. Sale of Property. A Property constituting part of the collateral
for the Credit Facility and other property owned by Borrowers and not
constituting part of the collateral pool for the Credit Facility may be sold
with the prior approval of Co-Lenders, which approval will not be unreasonably
withheld or delayed, provided that (i) such sale is an arms length bona fide
sale, (ii) no default has occurred and is continuing under the Credit Facility
Documents, (iii) the Loan to Value Requirement, the Minimum Debt Service
Coverage Ratio, the Supplemental Debt Service Coverage Ratio, the Fixed Charge
Coverage Ratio and the Debt-to-Tangible Net Worth Requirement shall continue to
be maintained and satisfied after any such release, (iv) if the property being
sold is a Property constituting part of the collateral pool for the Credit
Facility, the outstanding Principal Balance of the Credit Facility shall be
reduced by an amount equal to greater of (x) 100% of the net proceeds (i.e,
gross sales proceeds less usual and ordinary arms-length third party costs and
expenses actually incurred by Borrowers in connection with such sale, as
substantiated by evidence reasonably satisfactory to Co-Lenders) realized on the
sale of such Property, and (y) 60% of the Approved Value of such Property as of
the date upon which a binding contract for the sale of such Property has been
entered into (so long as such sale occurs within 180 days after such contract is
entered into, it being agreed that if such sale occurs more than 180 days after
such contract is entered into the Approved Value of such Property as of the date
of sale shall be utilized), (v) if property being sold does not constitute part
of the collateral pool for the Credit Facility, 100% of the net proceeds (i.e,
gross sales proceeds less usual and ordinary arms-length third party costs and
expenses actually incurred by Borrowers in connection with such sale, as
substantiated by evidence reasonably satisfactory to Co-Lenders) realized on the
sale of such property shall be applied first to the payment of the Other Secured
Debt, if any, encumbering such property and which is payable to unrelated third
parties, and next to the reduction of the outstanding Principal Balance of the
Credit Facility before being used for any other purpose, (vi) Co-Lenders shall
be of the reasonable opinion that the sale of any such Property constituting
part of the collateral pool for the Credit Facility will not have a material
adverse effect on the value, quality, composition or character of the remaining
Properties in collateral pool for the Credit Facility, and (vii) all of the
terms, covenants, conditions, representations and warranties contained in the
Credit Facility Documents shall continue to be complied with after any such
sale. If a Property constituting part of the collateral pool for the Credit
Facility is sold in compliance with the provisions of this paragraph, Co-Lenders
shall authorize Agent to release such Property from the lien of the Mortgage and
other Credit Facility Documents encumbering such Property contemporaneously with
the sale of such Property.


                                       13
<PAGE>   18
            17. New Debt or Equity Offering. The net cash proceeds of any new
debt or equity offering by Borrowers or their respective subsidiaries or
Affiliates shall (unless otherwise agreed to by Co-Lenders in the exercise of
their sole and absolute discretion) be applied first to the reduction of the
outstanding Principal Balance of the Credit Facility before being used for any
other purpose. The net proceeds of any new debt or equity offering by BRT may
first be contributed by BRT to BOP so long as the full amount of such net
proceeds shall immediately upon receipt by BOP be applied in accordance with the
preceding sentence.

            18. Restrictions on Transfer and Further Encumbrance. Except as
otherwise expressly provided to the contrary in the Credit Facility Documents,
no part of the Properties nor any interest of any nature whatsoever therein
(whether legal or beneficial or whether held directly or indirectly), nor any
interest of any nature whatsoever in Borrowers (whether partnership, stock,
equity, beneficial, profit, loss or otherwise or whether held directly or
indirectly, other than stock of BRT and limited partnership interests in BOP
issued to transferring persons, parties or entities as partial or total
consideration for the transfer of properties to BOP and irrespective of whether
constituting part of the collateral pool for the Credit Facility), shall in any
manner be further encumbered, sold, transferred, assigned or conveyed, or
permitted to be further encumbered, sold, transferred, assigned or conveyed
without the prior consent of Co-Lenders, which consent in any and all
circumstances may be withheld in the sole and absolute discretion of Co-Lenders.
The provisions of the foregoing sentence of this paragraph shall apply to each
and every such further encumbrance, sale, transfer, assignment or conveyance,
regardless of whether or not Co-Lenders have consented to, or waived by their
action or inaction their rights hereunder with respect to, any such previous
further encumbrance, sale, transfer, assignment or conveyance, and irrespective
of whether such further encumbrance, sale, transfer, assignment or conveyance is
voluntary, by reason of operation of law or is otherwise made. Until the Debt
has been paid in full, and unless otherwise consented to the contrary by
Co-Lenders in the exercise of their sole and absolute discretion, (i) not less
than a 75% interest in BOP shall at all times be owned and controlled by BRT,
and which interest shall at all times remain unencumbered other than by the
Credit Facility Documents, (ii) the sole general partner of BOP shall at all
times be BRT and BRT shall not encumber, sell, transfer, assign or convey its
general partner interest in the BOP, other than by the Credit Facility
Documents, (iii) not less than the present interest held either directly or
indirectly by BRT and/or BOP in each BRT/BOP Limited Partnership which owns an
Initial Property shall at all times continue to be owned and controlled by BRT
and/or BOP, which interest in each such BRT/BOP Limited Partnership shall at all
times remain unencumbered except by the Credit Facility Documents, and (iv) the
management and day to day operations of BRT, BOP and each BRT/BOP Limited
Partnership shall at all times be under the active control of BRSC, or another
management company of comparable experience and credentials and which is
otherwise reasonably acceptable to Co-Lenders. Nothing contained in this
paragraph or elsewhere in this Agreement or the other Credit Facility Documents
shall be deemed or construed to restrict in any manner whatsoever BRT's ability
to issue any common stock or beneficial shares of beneficial interests in BRT,
or the transferability of shares in BRT or limited partnership units in BOP, or
BOP's ability to issue additional limited partnership units in accordance with
the provisions of its agreement of limited partnership, it being agreed that
additional partnership units in BOP will only be issued as consideration in
whole or in part for properties being acquired by Borrowers in compliance with
the provisions of this Agreement. In addition, and upon prior notice to
Co-Lenders, WOP and the ownership of its assets may be consolidated into BOP
and/or any one or more of the BRT/BOP Limited Partnerships and the ownership of
their respective assets may be consolidated into BOP, in each case pursuant to
documents and procedures which are in form and substance reasonably satisfactory
to Co-Lenders.


                                       14
<PAGE>   19
            19. Commitment Fee. In consideration of Co-Lenders extending to
Borrowers the Credit Facility in accordance with the provisions of the Credit
Facility Documents, Borrowers shall pay to Co-Lenders on the date of execution
and delivery of this Agreement, and as a condition precedent to the first
advance of the Credit Facility, a commitment fee (the "Commitment Fee") of
$600,000, which Commitment Fee shall be divided pro rata between Co-Lenders,
shall be deemed earned in full by Co-Lenders upon payment by Borrowers, and
shall in no event be refundable in whole or in part.

            20. Administrative Fees. In consideration of the administration and
maintenance of the Credit Facility, Borrowers shall pay to (i) Agent an annual
administration fee for the Credit Facility equal to $35,000 per annum (the
"Credit Facility Administration Fee"), which Credit Facility Administration Fee
shall be payable by Borrowers, in advance, on the date of execution and delivery
of this Agreement and on the first anniversary date thereof and shall be deemed
earned in full by Agent upon payment. The Credit Facility Administration Fee
shall constitute part of the Debt and the obligation of Borrowers to pay the
Credit Facility Administration Fee pursuant to this paragraph shall be secured
by the Mortgages and the other Credit Facility Documents.

            21. Fee on Unused Portion of Credit Facility. Borrowers shall pay a
fee (the "Unused Facility Fee") on the Unused Portion of the Credit Facility,
which Unused Facility Fee shall be payable quarterly in arrears, shall be
calculated separately for each calendar quarter or portion thereof during the
term of the Credit Facility on the basis of the actual number of days elapsed
over a 360 day year and on the basis of the daily weighted average of the Unused
Portion of the Credit Facility, and shall equal 1/8% per annum from the date of
this Agreement to and including March 31, 1997, and shall, effective April 1,
1997, and thereafter equal 1/4% per annum. The Unused Facility Fee shall be
payable to Agent and shall be distributed by Agent to the Co-Lenders in
accordance with their respective daily weighted average Credit Facility
Percentage Interests during the calendar quarter or portion thereof with respect
to which the same is payable. The Unused Facility Fee shall constitute part of
the Debt and the obligation of Borrowers to pay the Unused Facility Fee pursuant
to this paragraph shall be secured by the Mortgages and the other Credit
Facility Documents.

            22.  Representations and Warranties.  Borrowers hereby represent
and warrant to Co-Lenders as follows:

                        (a) BOP is and will continue to be a limited partnership
            duly organized, validly existing and in good standing under the laws
            of the State of Delaware; BRT is and will continue to be a real
            estate investment trust duly organized, validly existing and in good
            standing under the laws of the State of Maryland and is and will at
            all times continue to maintain its tax status as a REIT under
            Section 856 of the Internal Revenue Code; each BRT/BOP Limited
            Partnership is and will continue to be a limited partnership duly
            formed, validly existing and in good standing under the laws of the
            Commonwealth of Pennsylvania; WOP is and will continue to be a
            limited partnership duly formed, validly existing and in good
            standing under the laws of the State of Delaware; BRP is and will
            continue to be a general partnership duly formed, validly existing
            and in good standing under the laws of the Commonwealth of
            Pennsylvania; BRC and BHI are and will continue to be corporations
            duly organized, validly existing and in good standing under the laws
            of the Commonwealth of Pennsylvania; each Borrower and each
            Guarantor is and will continue to be duly licensed and qualified as
            a foreign partnership, corporation or otherwise in each jurisdiction
            in which a Property is located or failure to be qualified or
            licensed


                                       15
<PAGE>   20
            would have a materially adverse effect on any Borrower, any
            Guarantor, any Property or other Collateral or on the business,
            assets, operations, property or financial or other condition of any
            Borrower or Guarantor; each Borrower has and will continue to have
            all requisite power and authority to borrow under the Credit
            Facility and to execute and deliver, and to observe and perform all
            of its obligations under, this Agreement and the other Credit
            Facility Documents; each Guarantor has and will continue to have all
            requisite power and authority to execute and deliver, and to observe
            and perform all of its obligations under the Credit Facility
            Documents; BRT has and will continue to have all requisite power and
            authority to be the sole general partner of BOP and a general
            partner of BRP (unless and until such general partnership interest
            is transferred by BRT to BOP) and to execute and deliver on behalf
            of BOP, as its sole general partner, and on behalf of BRP, as one of
            its general partners, all of the Credit Facility Documents, and to
            observe and perform all of its obligations, as the sole general
            partner of the BOP and as one of the general partners of BRP (unless
            and until such general partnership interest is transferred by BRT to
            BOP), under the Credit Facility Documents; BHI has and will continue
            to have all requisite power and authority to be the sole general
            partner of WOP and to execute and deliver on behalf of WOP, as its
            sole general partner, all of the Credit Facility Documents, and to
            observe all of its obligations, as the sole general partner of WOP
            under the Credit Facility Documents, BOP has and will continue to
            have all requisite power and authority to be the sole general
            partner of those of the BRT/BOP Limited Partnership in which it is
            currently the sole general partner (i.e., C/N Leedom Limited
            Partnership II and C/N Iron Run Limited Partnership III) and to
            execute and deliver on behalf of each such BRT/BOP Limited
            Partnership, as its sole general partner, all of the Credit Facility
            Documents, and to observe and perform all of its obligations, as the
            sole general partner of each such BRT/BOP Limited Partnership, under
            the Credit Facility Documents; WOP has and will continue to have all
            requisite power and authority to be the sole general partner of
            those of the BRT/BOP Limited Partnership in which it is currently
            the sole general partner (i.e., LC/N Horsham Limited Partnership,
            LC/N Keith Valley Limited Partnership I, Nichols Lansdale Limited
            Partnership III, Newtech III Limited Partnership, Newtech IV Limited
            Partnership, C/N Oaklands Limited Partnership I and Fifteen Horsham,
            L.P.) and to execute and deliver on behalf of each such BRT/BOP
            Limited Partnership, as its sole general partner, all of the Credit
            Facility Documents, and to observe and perform all of its
            obligations, as the sole general partner of each such BRT/BOP
            Limited Partnership, under the Credit Facility Documents; and each
            Borrower and each Guarantor has and will continue to have all
            requisite power and authority to own their respective assets and
            property and to carry on the business in which they are engaged.

                        (b) The execution, delivery and performance by Borrowers
            of this Agreement and the other Credit Facility Document, the
            borrowings by the Borrowers under the Agreement and the other Credit
            Facility Documents, and the execution, delivery and performance by
            Borrowers, and by BRT, individually and as the sole general partner
            of BOP and as a general partner of BRP, and by BHI, as the sole
            general partner of WOP, and by BOP, individually and as the sole
            general partner of those of the BRT/BOP Limited Partnership in which
            it is the sole general partner (i.e., C/N Leedom Limited Partnership
            II and C/N Iron Run Limited Partnership III), and by WOP
            individually, and as the sole


                                       16
<PAGE>   21
            general partner of the BRT/BOP Limited Partnership in which it is
            the sole general partner (i.e., LC/N Horsham Limited Partnership,
            LC/N Keith Valley Limited Partnership I, Nichols Lansdale Limited
            Partnership III, Newtech III Limited Partnership, Newtech IV Limited
            Partnership, C/N Oaklands Limited Partnership I and Fifteen Horsham,
            L.P., and by Guarantors of all other agreements and instruments (not
            mentioned above) to be executed and delivered by them pursuant
            hereto or thereto or in connection herewith or therewith, have been
            or will be duly authorized by all necessary corporate action
            (including any necessary stockholder action), partnership action or
            other action on the part of each of them, and do not and will not
            (i) violate (A) any provision of any law, rule, regulation, order,
            writ, judgment, decree, determination or award presently in effect
            having applicability to any Borrower or Guarantor of any of the
            organizational documents of any Borrower or Guarantor, or (B) any
            indenture, agreement or other instrument to which any Borrower or
            Guarantor is a party, or by which any Borrower or Guarantor or any
            of their respective property or assets is bound, except in cases
            where such violation will not have a materially adverse effect on
            any Property, any other Collateral or on the business, assets,
            operations, property or financial or other condition of any
            Borrowers or Guarantor, or (ii) be in conflict with, result in a
            breach of or constitute (with due notice or lapse of time or both) a
            default under any such indenture, agreement or other instrument,
            except in cases where such conflict, breach or default will not have
            a materially adverse effect on any Property, any other Collateral or
            on the business, assets, operations, property or financial or other
            condition of any Borrower or Guarantor, or (iii) result in or
            require (except as specifically contemplated by this Agreement) the
            creation or imposition of any lien of any nature upon any of the
            assets or property of any Borrower or Guarantor. This Agreement has
            been duly executed and constitutes, and (when executed and delivered
            by Borrowers and/or Guarantors, as applicable) each other Credit
            Facility Document now or hereafter executed and delivered by
            Borrowers and/or the Guarantors pursuant hereto or thereto or in
            connection herewith, or therewith, will each constitute the legal,
            valid and binding obligation of Borrowers and/or Guarantors
            respectively, enforceable against them in accordance with their
            terms, except as enforcement may be limited by bankruptcy,
            insolvency and other similar laws affecting the enforcement of
            creditors' rights generally and by moratorium laws from time to time
            in effect. No authorization, consent, approval, license or formal
            exemption from, nor any filing, declaration or registration with,
            any court, governmental agency or regulatory authority (Federal,
            state, local or foreign), including, without limitation, the
            Securities and Exchange Commission, or with any securities exchange,
            is required by Borrowers or Guarantor in connection with the making
            and performance by Borrowers of this Agreement or the Facility Notes
            or with respect to the borrowings hereunder or for the execution,
            delivery and performance by Borrowers and Guarantors of the other
            Credit Facility Documents, except for those already obtained or
            completed.

                        (c) When duly recorded or filed in the appropriate
            public records, the Mortgages and the Financing Statements shall
            each create in the Co-Lenders, valid and perfected first liens upon
            the property subject thereto and no further action will be required
            to perfect such liens. The representations in this subparagraph are
            limited to Borrowers' review of the title


                                       17
<PAGE>   22
            policies insuring the respective liens of the Mortgages and their
            own actual knowledge.

                        (d) The December 31, 1995, audited consolidated
            financial statements and the December 31, 1995 annual unaudited
            consolidating financial statements of Borrowers previously delivered
            by Borrowers to Co-Lenders are correct in all material respects and
            fairly set forth the financial condition of Borrowers, respectively,
            as of December 31, 1995, and the results of Borrowers' respective
            operations and changes in respective financial position for the
            period then ended, all in accordance with GAAP. Since December 31,
            1995, there has not occurred any material adverse change in the
            business, assets, operations, property or financial or other
            condition of Borrowers.

                        (e) All quarterly consolidated and consolidating
            unaudited financial statements for the calendar quarter ending
            September 30, 1996 of Borrowers previously delivered by Borrowers to
            Co-Lenders are correct in all material respects and fairly set forth
            the financial condition of Borrowers, as of the dates set forth
            therein, and the results of Borrowers' operations and changes in
            Borrowers' respective financial position for the period then ended,
            all in accordance with GAAP. Since the date of such statements
            delivered by Borrowers, there has not occurred any material adverse
            change in the business, assets, operations, property or financial or
            other condition of Borrowers.

                        (f) All quarterly unaudited individual and consolidated
            operating statements and all annual individual and consolidated
            operating statements previously delivered by Borrowers to Co-Lenders
            with respect to the Initial Properties are correct in all material
            respects and fairly set forth the operating results of the Initial
            Properties as of the dates set forth therein, and the results of
            each Initial Property's respective operations and changes in each
            Initial Property's operating activities for the period then ended.
            Since the date of such statements, there has not occurred any
            material adverse change in the operations of any Initial Property.

                        (g) Except as set forth on Schedule 1 attached to this
            Agreement, there are no actions, suits or proceedings pending or, to
            the best knowledge of Borrowers, threatened against any Borrower,
            any Guarantor or any of their respective properties or assets by or
            before any court or any Federal, state, local, foreign or other
            governmental agency or regulatory authority which, in the reasonable
            judgment of Borrowers, after consultation with counsel, would have
            or could reasonably be expected to have a materially adverse effect
            on any Property or any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor or would or could reasonably be expected to materially
            impair the ability of any Borrower or Guarantor to perform their
            respective obligations under this Agreement, the Facility Notes and
            the other Credit Facility Documents, or would otherwise be required
            to be reported under applicable Federal or state securities laws.

                        (h) Borrowers own fee title to, or a leasehold estate
            in, or other title or ownership interest in all their respective
            properties and assets including, without limitation, the properties
            and assets reflected on the audited consolidated financial
            statements referred to in subparagraph (d) above and assets and
            properties acquired since December 31, 1995.


                                       18
<PAGE>   23
                        (i) Borrowers own fee title to all of the Initial
            Properties (other than Delaware Corporate Center with respect to
            which BOP's interest is a leasehold estate). The fee title to and
            leasehold estates in the Properties are and will continue to be
            owned and held by Borrowers free and clear of all liens and monetary
            encumbrances of any nature whatsoever (except for the Permitted
            Title Exceptions). For those Properties with respect to which
            Borrowers holds leasehold estates, the Ground Leases are in full
            force and effect and no event has occurred, which but for the
            passage of time or notice, or both, would constitute a default under
            any Ground Lease, and no action has commenced and no notice has been
            given or received for the purposes of terminating any Ground Lease.
            All non-monetary encumbrances affecting the Properties will either
            benefit the Properties or will enhance the integrated use, operation
            and management of the Properties or will not otherwise have a
            materially adverse effect on the title, ownership, value, use or
            operation of any of the Properties.

                        (j) Each Borrower and Guarantor has filed or caused to
            be filed all United States and state income tax returns which are
            required to be filed and has paid or caused to be paid all taxes
            shown on such returns or on any assessment made against it, except
            in cases where such a failure to file or to pay would not have a
            materially adverse effect on any Property, any other Collateral or
            on the business, assets, operations, property or financial or other
            condition of any Borrower or Guarantor. Each Borrower and Guarantor
            has filed or caused to be filed all United States, state, local and
            foreign tax returns (other than income tax returns) which are
            required to be filed and has paid or caused to be paid all taxes
            shown on such returns or on any assessment made against it and all
            other taxes, fees or other charges imposed on it by any governmental
            authority, agency or instrumentality which have become due and
            payable (other than taxes, assessments, fees and other charges the
            validity or amount of which is being contested in good faith by
            appropriate proceeding [and otherwise in compliance with the general
            requirements for contesting Taxes, as more specifically set forth in
            paragraph 29 of this Agreement] or the failure to pay which would
            not have a materially adverse effect on any Property, any other
            Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor). No tax
            liens have been filed against any Borrower or Guarantor or against
            their respective assets and property (other than those the validity
            or amount of which is being contested in good faith by appropriate
            proceedings [and otherwise in compliance with the general
            requirements for contesting Taxes, as more specifically set forth in
            paragraph 29 of this Agreement] or the foreclosure of which would
            not have a materially adverse effect on any Property, any other
            Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor), and no
            material claims are being asserted in respect of any taxes (other
            than those being contested as aforesaid or those that are not
            material as aforesaid).

                        (k) Neither any Borrower, nor any Guarantor is in
            default in any respect under or in respect of any contract,
            agreement or other instrument to which it is a party or by which it
            or its property or assets may be bound, except in cases where such
            default has no materially adverse effect on any Property, any other
            Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor. No Event
            of Default described in paragraph 43 hereof has occurred and


                                       19
<PAGE>   24
            is continuing and no event has occurred which but for notice, lapse
            of time, or both, would constitute an Event of Default. Neither any
            Borrower, nor any Guarantor is in default under any order, judgment,
            award or decree of any court, arbitrator or other governmental
            authority binding upon or affecting it or by which any of its
            property or assets may be bound or affected, except in cases where
            such default has no materially adverse effect on any Property, any
            other Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor, and no
            such order, judgment, award or decree materially adversely affects
            the ability of any Borrower or Guarantor to carry on its business as
            now conducted or the ability of any Borrower or Guarantor to perform
            their respective obligations under this Agreement, the Facility
            Notes and the other Credit Facility Documents.

                        (l) Each Borrower and Guarantor maintains with
            financially sound and reputable insurance companies, with premiums
            at all times currently paid, property and casualty insurance upon
            fixed assets and inventories, public liability insurance, fidelity
            bond coverage, business interruption insurance, and all insurance
            required by law, all in form and amounts required by law and
            customary to the respective natures of their businesses and
            properties, and including, without limitation, the Insurance
            Policies required pursuant to paragraph 30 of this Agreement, except
            in cases where failure to maintain such insurance will not have or
            potentially have a materially adverse effect on any Property, any
            other Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor.

                        (m) Neither this Agreement, any other Credit Facility
            Document nor any document, financial statement, report, notice,
            schedule, certificate, statement or other writing furnished to or to
            be furnished to Co-Lender by any Borrower or Guarantor in connection
            with the Credit Facility or otherwise in connection with the
            transaction contemplated hereby, contains or will contain any untrue
            or misleading statement of, or omission of, any material fact as of
            the date upon which the same is so furnished.

                        (n) All of the Properties and their use comply and will
            continue to comply in all material respects with all applicable
            zoning resolutions, building codes, fire safety, subdivision and
            other applicable laws, rules and regulations including, without
            limitation, and to the best knowledge of Borrowers (which knowledge
            is based solely upon reports of the inspecting engineers who have
            prepared structural and engineering reports with respect to
            Properties) the Americans with Disabilities Act.

                        (o) No portion of any Property nor any improvements
            located on any Premises which are material to the operation, use or
            value of a Property are damaged or injured in any material respect
            as a result of any fire, explosion, accident, flood or other
            casualty.

                        (p) Except for the Ground Leases, the Leases described
            on Schedule 2 attached to this Agreement and the other leases
            described on Schedule 3 attached to this Agreement, there are no
            other leases, management and/or leasing agreements for, concerning
            or with respect to any of the Properties or any portions thereof,
            including any personal property located thereon.


                                       20
<PAGE>   25
                        (q) No condemnation or eminent domain proceeding has
            been commenced or to the knowledge of Borrowers is threatened
            against any Property.

                        (r) Borrowers have no knowledge of any notices of any
            violation of Federal law or municipal ordinances or orders or
            requirements of the States in which the Properties are located or
            any municipal department or other governmental authority which
            remain uncured.

                        (s) There exists no default by any Borrower under any
            deed of trust, mortgage, pledge or other security agreement
            affecting any Property or any other Collateral, or any portion
            thereof, or under any Material Agreement pertaining to any Property,
            or by which any portion of any of the Properties or the other
            Collateral may be bound, except where such default does not and will
            not have a material adverse effect on any Property, or any other
            Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor.

                        (t) Neither any Borrower nor any Guarantor is engaged in
            the business of extending credit for the purpose of purchasing or
            carrying any margin stock (within the meaning of Regulation G or U
            of the Board of Governors of the Federal Reserve System of the
            United States). No part of the proceeds of any advance made under
            the Credit Facility will be used to purchase or carry any such
            margin stock or to extend credit to others for the purpose of
            purchasing or carrying any such margin stock or for the purpose of
            repaying any loan the proceeds of which were used for such purpose.
            If requested by Agent, Borrowers will furnish to Agent a statement
            in conformity with the requirements of Federal Reserve Form U-1
            referred to in said Regulation U. No part of the proceeds of any
            advance made under the Credit Facility will be used for any purpose
            that violates, or which is inconsistent with, the provisions of
            Regulation G, T, U or X or any other regulation of the Board of
            Governors of the Federal Reserve System of the United States.

                        (u) Neither any Borrower nor any Guarantor has taken any
            action which would cause it to become an "employee benefit plan" as
            defined in Section 3(3) of the Employee Retirement Income Security
            Act of 1974, as amended from time to time ("ERISA"), or a
            "governmental plan" as defined in Section 3(32) of ERISA, or a
            "plan" as defined in Section 4975(e)(1) of the Internal Revenue
            Code, or which would cause its assets to become "plan assets" as
            defined in 29 C.F.R. Section 2510.3-101.

                        (v) The proceeds of any and all advances under the
            Credit Facility shall be used for the purposes set forth in
            paragraph 8 of this Agreement and for no other purposes.

                        (w) BRT and BOP taken as a whole are each, and after
            giving effect to all of the transactions contemplated by this
            Agreement and the other Credit Facility Documents, will each
            continue to be, in a solvent condition. As used herein, "solvent"
            means, when used with respect to any Person, that (i) the present
            fair saleable value of such Person's assets is in excess of the
            total amount of its liabilities (including contingent liabilities);
            (ii) such Person is able to pay its debts as they become due; and
            (iii) such Person does not have unreasonably small


                                       21
<PAGE>   26
            capital to carry on such Person's business as theretofore operated
            and all businesses in which such Person is about to engage.

                        (x) Each Borrower is not, and will by such acts as may
            be necessary, continue not to be, an investment company within the
            meaning of the Investment Company Act of 1940.

                        (y) No Borrower is a "holding company" or a "subsidiary
            company" of a "holding company," or an "affiliate" of a "holding
            company," or of a "subsidiary company" of a "holding company,"
            within the definitions of the Public Utility Holding Company Act of
            1935, as amended.

                        (z) Borrowers have dealt with no brokers in connection
            with the Credit Facility, and no brokerage fees or commissions are
            payable by or to any Person in connection with this Agreement or the
            Credit Facility. Co-Lenders shall not be responsible for the payment
            of any fees or commissions to any broker and Borrowers shall
            indemnify, defend and hold Co-Lenders harmless from and against any
            claims, liabilities, obligations, damages, costs and expenses
            (including reasonable attorneys' fees and disbursements) made
            against or incurred by Co-Lenders as a result of claims made or
            actions instituted by any broker or Person claiming by, through or
            under Borrowers in connection with the Credit Facility.

                        (aa) No aspect of any of the transactions contemplated
            herein violate or will violate any usury laws or laws regarding the
            validity of agreements to pay interest in effect on the date hereof.

                        (bb) No Borrower is a "foreign person" within the
            meaning of Section 1445 or 7701 of the Internal Revenue Code.

                        (cc) No Borrower uses a trade name and no Borrower has
            conducted or presently conducts business under any name other than
            its actual name set forth herein. The principal place of business of
            each Borrower is as stated in the recitals hereto.

The representations and warranties of Borrowers under this paragraph shall be
deemed to be continuing representations and warranties which may at all times
during the term of the Credit Facility be relied upon by Co-Lenders (and each
Participant) unless Agent shall have been informed by Borrowers of any change in
fact or circumstance which would affect the continuing accuracy of the
representations and warranties set forth in this paragraph. Borrowers shall
promptly inform Agent (but in no event later than five (5) business days after
Borrowers shall have actual knowledge thereof) of the occurrence of any fact,
circumstance or event which would change or materially affect in any way the
continuing accuracy of the representations and warranties set forth in this
paragraph or which would render any such representation or warranty inaccurate
or false in any material respect.

            23. Covenants. Borrowers shall observe and perform and shall cause
Guarantors to observe and perform, as applicable, at all times during the term
of the Credit Facility the following covenants:

                        (a) BRT and BOP shall at all times during the term of
            the Credit Facility maintain a net worth (i.e. value of total assets
            less total liabilities, as determined on the basis of generally
            accepted accounting principles consistently applied) of at least the
            aggregate of $100,000,000 plus ninety (90%) percent of the net
            proceeds (i.e., after the expenses incurred in


                                       22
<PAGE>   27
            connection with such offerings) of all equity offerings by BRT or
            BOP after the date of this Agreement. In determining the aforesaid
            net worth, Co-Lenders shall give credit to the issued and
            outstanding Series A Convertible Preferred Stock held by the Voting
            Trust dated November 6, 1996 for the benefit of the Commonwealth of
            Pennsylvania State Employes Retirement System.

                        (b) In the case of BRT, do or cause to be done all
            things necessary to preserve, renew and keep in full force and
            effect its existence as a real estate investment trust and its tax
            status as a REIT under Section 856 of the Internal Revenue Code.

                        (c) Comply in all material respects with, and do or
            cause to be done all things necessary to preserve, renew and keep in
            full force and effect, its material rights, licenses, permits and
            franchises and the rights and franchises, pertaining to or
            comprising part of the Properties or the other Collateral unless the
            failure to do so does not have a material adverse effect on any
            Property or any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor; comply with all laws, rules and regulations applicable
            to it except where the failure to do so does not have a material
            adverse effect on any Property or any other Collateral or on the
            business, assets, operations, property or financial or other
            condition of any Borrower or Guarantor; at all times maintain and
            preserve all property used or useful in the conduct of its business
            and keep the same in good repair, working order and condition, and
            from time to time make, or cause to be made, all repairs, renewals
            and replacements thereto, so that the business carried on in
            connection therewith may be properly conducted at all times except
            where the failure to do so does not have a material adverse effect
            on any Property or any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor;

                        (d) Keep its insurable properties adequately insured at
            all times; maintain such other insurance, to such extent and against
            such risks, including fire and other risks insured against by
            extended coverage, as is customary with companies in the same or
            similar businesses; maintain in full force and effect public
            liability insurance against claims for personal injury or death or
            property damage occurring upon, in, about or in connection with the
            use of any properties owned, occupied or controlled by it in such
            amount as it shall reasonably deem necessary; and maintain such
            other insurance as may be required by law.

                        (e) Borrowers (i) shall comply in all material respects
            with the requirements of, and to the extent within Borrowers'
            control, maintain, preserve, enforce and renew rights of way,
            easements, grants, privileges, licenses and restrictive covenants
            which from time to time affect or pertain to the whole or any
            portion of a Property, (ii) shall not modify, amend or terminate any
            rights of way, easements, grants, privileges, licenses or
            restrictive covenants which from time to time affect or pertain to
            the whole or any portion of a Property, and (iii) shall not without
            obtaining the prior consent of Co-Lenders (which consent shall not
            be unreasonably withheld or delayed) modify, amend or terminate, or
            surrender any of its rights under, any of such rights of way,
            easements, grants, privileges, licenses or restrictive covenants,
            unless, with respect to a modification or amendment referred to in
            clauses (ii) and (iii) only, such modification or amendment would
            not have an adverse effect on any


                                       23
<PAGE>   28
            Property, any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor.

                        (f) Borrowers shall at all times comply with and shall
            cause the Properties to continue to comply with all existing and
            future governmental laws, orders, ordinances, rules and regulations
            affecting the Properties, or any portion thereof or the use thereof,
            except where the failure to do so does not have a material adverse
            effect on any Property or any other Collateral or on the business
            assets, operations, property, financial or other condition of any
            Borrower or Guarantor.

                        (g) Promptly repair, replace or rebuild any part of a
            Property which may be damaged or destroyed by fire or other property
            hazard or casualty (including any fire or other property hazard or
            casualty for which insurance was not obtained or obtainable) or
            which may be affected by any taking by any public or quasi-public
            authority through eminent domain or otherwise, and shall complete
            and pay for, within a reasonable time, any portion of any Property
            which is at any time in the process of renovation or repair.

                        (h) Observe and perform each and every term to be
            observed or performed by Borrowers pursuant to the terms of any
            agreement or recorded instrument affecting or pertaining to the
            Properties, except where the failure to do so does not have a
            material adverse effect on any Property or any other Collateral or
            on the business, assets, operations, property or financial or other
            condition of any Borrower or any Guarantor.

                        (i) Observe and perform, and cause to be observed and
            performed, all of the terms, covenants and provisions contained in
            the Credit Facility Documents.

                        (j) Borrowers will not, without obtaining the prior
            consent of Co-Lenders, initiate, join in or consent to any private
            restrictive covenant, zoning ordinance, or other public or private
            restrictions, limiting or adversely affecting the uses which may be
            made of the Properties or any part thereof.

                        (k) Pay all of its indebtedness and obligations promptly
            and in accordance with their terms (other than such indebtedness and
            obligations, the validity or amount of which is being contested in
            good faith by appropriate proceeding [and otherwise in compliance
            with the general requirements for contesting Taxes, as more
            specifically set forth in paragraph 29 of this Agreement] or where
            the failure to pay would not have a materially adverse effect on any
            Property, any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor; and pay and discharge promptly all taxes, assessments
            and governmental charges or levies imposed upon it or upon its
            income or profits or in respect of its property, before the same
            shall become in default, as well as all lawful claims for labor,
            materials and supplies or otherwise which, if unpaid, might become a
            lien upon such properties or any part thereof (except for such
            taxes, assessments, governmental charges or levies, or such claims,
            the validity or amount of which is being contested in good faith by
            appropriate proceeding [and otherwise in compliance with the general
            requirements for contesting Taxes, as more specifically set forth in
            paragraph 29 of this Agreement] or where the failure


                                       24
<PAGE>   29
            to pay would not have a materially adverse effect on any Property,
            any other Collateral or on the business, assets, operations,
            property or financial or other condition of any Borrower or
            Guarantor).

                        (l) Furnish to Co-Lenders all financial statements and
            information required pursuant to the provisions of this Agreement
            and the other Credit Facility Documents, it being understood that
            such financial information shall be delivered by Borrowers to Agent
            for distribution by Agent to Co-Lenders.

                        (m) Give Agent prompt written notice of (i) the
            occurrence and nature of any Event of Default; (ii) the occurrence
            and nature of any event which has resulted in, or which Borrowers
            believes will result in, a materially adverse change in any Property
            or any other Collateral or in the condition or operations of any
            Property or in the financial condition or operations of any Borrower
            or Guarantor; or (iii) any matter (other than those specified above
            as to which Co-Lenders have received due notice) which has resulted
            in, or which Borrowers reasonably believe will result in, a
            materially adverse change in any Property or any Collateral or in
            the condition or operations of any Property or in the financial
            condition or operations of any Borrower or Guarantor.

                        (n) Unless Co-Lenders shall have previously consented in
            writing, neither any Borrower nor any Guarantor (i) will take any
            action which would cause it to become an "employee benefit plan" as
            defined in Section 3(3) of ERISA, or a "governmental plan" as
            defined in Section 3(32) of ERISA, or a "plan" as defined in Section
            4975(e)(1) of the Internal Revenue Code, or its assets to become
            "plan assets" as defined in 29 C.F.R. Section 2510.3-101, or (ii)
            will sell, assign or transfer its respective property, or any
            portion thereof or interest therein (other than a lease entered into
            in conformity with the provisions of this Agreement), to any
            transferee which does not execute and deliver to Co-Lenders its
            written assumption of the obligations of this covenant, it being
            understood that nothing contained herein shall be construed to make
            the obligations of this covenant applicable to any transferee of a
            Property insofar as the Mortgage encumbering such Property is being
            released in accordance with the provisions of paragraph 15 of this
            Agreement immediately prior to or simultaneously with such transfer.
            Each Borrower further covenants and agrees to protect, defend,
            indemnify and hold Co-Lenders harmless from and against all loss,
            cost, damage and expense (including without limitation, all excise
            taxes, costs of correcting any prohibited transaction or obtaining
            an appropriate exemption and reasonable attorneys' fees) which
            Co-Lenders may incur as a result of breach of this covenant by any
            Borrowers or Guarantor. This indemnity shall survive the repayment
            or retirement of the Credit Facility.

                        (o) Borrowers shall not without the prior consent and
            approval of Co-Lenders enter into, modify, amend or terminate (in
            whole or in part) any Lease covering 20,000 square feet or more of
            space located in any Property from time to time constituting part of
            the collateral pool for the Credit Facility. Borrowers shall not
            enter into any Lease covering less than 20,000 square feet of space
            located in the Improvements unless such Lease is in a form approved
            by Co-Lenders (with such changes therein as may be consistent with
            normal and prudent business practices pertaining to comparable
            leases of space in properties which are similar to


                                       25
<PAGE>   30
            the Property in question and otherwise consistent with Borrowers
            usual business practices), and at rents and otherwise on terms which
            are consistent with prevailing market conditions, as reasonably
            determined by Borrowers, and Borrowers shall not terminate any such
            Leases other than in accordance with normal and prudent business
            practices. Co-Lenders shall within ten (10) business days after
            delivery by Borrowers to Agent of a term sheet setting forth in
            detail the proposed terms for any Lease in excess of 20,000 square
            feet indicate to Borrowers whether such terms have been approved
            (subject to review and approval of the final draft of such Lease by
            Co-Lenders). Co-Lenders shall indicate to Borrowers within ten (10)
            business days after delivery by Borrowers to Agent of the final
            draft of any Lease covering in excess of 10,000 square feet (and
            irrespective of whether a term sheet has first been submitted to
            Co-Lenders for approval with respect thereto) whether Co-Lenders
            have approved such Lease, such approval not to be unreasonably
            withheld or delayed. If Co-Lenders do not indicate to Borrowers
            within ten (10) business days after receipt by Agent of any such
            term sheet or any such Lease pursuant to the provisions of this
            subparagraph, as the case may be, either their approval or
            disapproval of the same, such approval shall be deemed to have been
            granted so long as the request for such approval indicates in bold
            type that failure to approve or disapprove such term sheet or Lease,
            as the case may be, within ten (10) business days after receipt
            shall be deemed to constitute the approval of Co-Lenders. Borrowers
            shall enforce the obligation of the tenants under the Leases and
            shall observe and perform the terms, covenants and provisions of the
            Leases on Borrowers' respective parts to be observed and performed.

                        (p) Cause all taxes, assessments, water rates, sewer
            rates and other charges with respect to the Properties to be paid
            prior to the date upon which any fine, penalty, interest or cost may
            be added thereto or imposed by law for the non-payment thereof
            (other than those the validity or amount of which is being contested
            in good faith by appropriate proceedings [and otherwise in
            compliance with the general requirements for contesting Taxes, as
            more specifically set forth in paragraph 29 of this Agreement] or
            the non-payment of which would not have a materially adverse effect
            on any Property, any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor).

                        (q) Cause all income taxes, corporate franchise taxes
            and other fees payable by each Borrower and Guarantor or otherwise
            pertaining to the Properties or the Collateral to be paid as and
            when the same become due and payable (other than those the validity
            or amount of which is being contested in good faith by appropriate
            proceedings [and otherwise in compliance with the general
            requirements for contesting Taxes, as more specifically set forth in
            paragraph 29 of this Agreement] or the non-payment of which would
            not have a materially adverse effect on any Property, any other
            Collateral or on the business, assets, operations, property or
            financial or other condition of any Borrower or Guarantor).

                        (r) Cause to be observed and performed each and every
            term, covenant and provision of any partnership agreement, joint
            venture agreement, tenancy-in-common agreement, condominium
            agreement, Ground Lease, Lease and property agreement relating to
            any Property or any other Collateral on the part of a Borrower, a
            Guarantor or any Person under their control to be observed and


                                       26
<PAGE>   31
            performed and cause to be taken all steps (short of the termination
            of any Lease) necessary to enforce their respective rights
            thereunder. No such partnership agreement, joint venture or
            tenancy-in-common agreement, condominium agreement or property
            agreement shall be in any manner modified, amended or terminated
            without the prior consent of Co-Lenders unless such agreement would
            not have a materially adverse effect on any Property, any other
            Collateral or on the business assets, operations, property or
            financial or other condition of any Borrower or any Guarantor.
            Notwithstanding the provisions of the foregoing sentence, no such
            partnership agreement pertaining to BOP, BRP or WOP and no Ground
            Lease shall be modified, amended or terminated in any respect
            without the prior consent of Co-Lenders in each and every case.

                        (s) Each request for an advance under the Credit
            Facility without further act or instrument shall constitute a
            reaffirmation by Borrowers, of each of the representations and
            warranties set forth in this Agreement and in each of the other
            Credit Facility Documents, which reaffirmation shall be a condition
            precedent to Co-Lenders' obligation to make advances under the
            Credit Facility.

                        (t) Take all necessary action to maintain the Properties
            and the other Collateral in good condition and repair and will not
            commit or suffer to be committed any waste with respect thereto. The
            failure of Borrowers to pay any Taxes or any installment thereof
            (other than those the validity or amount of which is being contested
            in good faith by appropriate proceedings [and otherwise in
            compliance with the general requirements for contesting Taxes, as
            more specifically set forth in paragraph 29 of this Agreement] or
            the non-payment of which would not have a materially adverse effect
            on any Property, any other Collateral or on the business, assets,
            operations, property or financial or other condition of any Borrower
            or Guarantor), or any Insurance Premiums payable with respect to any
            of the Insurance Policies covering the Properties or any portion
            thereof, or to use and apply the Rents strictly in accordance with
            the provisions of the Credit Facility Documents, shall be deemed for
            all purposes to constitute waste, regardless of whether the same
            would, in the absence of this provision, otherwise constitute waste
            under applicable law.

                        (u) Except as expressly permitted in accordance with the
            provisions of this Agreement or the other Credit Facility Documents,
            neither the Properties nor the other Collateral nor any portion
            thereof nor any interest therein or in any Borrower shall in any
            manner be further encumbered, sold, transferred or conveyed or
            permitted to be further encumbered, sold, transferred or conveyed
            without the prior consent of Co-Lenders, which consent may be
            withheld in the sole and absolute discretion of Co-Lenders;
            provided, however, that nothing contained herein shall prohibit the
            issuance of partnership interests in BOP or equity shares in BRT
            (subject to the provisions of paragraph 18 of this Agreement) to an
            entity which conveys a Property to Borrowers as partial or total
            consideration for the conveyance of such Property.

                        (v) Cause the Debt to be paid in accordance with the
            provisions of this Agreement and the other Credit Facility
            Documents.

                        (w) At all times continue to satisfy the Loan to Value
            Requirement.


                                       27
<PAGE>   32
                        (x) Neither any Borrowers nor any Guarantor nor any of
            their respective Affiliates or subsidiaries shall engage in any
            business or activity which is not directly related to the ownership,
            operation or management of the Properties constituting part of the
            Collateral for the Credit Facility or other properties not
            constituting part of the Collateral for the Credit Facility which
            are otherwise generally comparable in nature to the Properties
            constituting part of the Collateral for the Credit Facility.

                        (y) Neither Borrowers nor any of the respective
            Affiliates or subsidiaries of Borrowers will incur either directly
            or as a guarantor any liability (whether recourse or non-recourse)
            for the payment of any indebtedness other than the Debt and Other
            Permitted Debt. In addition to outstandings under the Credit
            Facility, (A) Borrowers shall be permitted after the date hereof to
            retain currently existing non-recourse secured debt, to retain
            and/or assume from other guarantors up to, but not in excess of,
            $10,458,000 of secured debt which has recourse, and of which
            $8,775,000 is held by First Union Bank and encumbers Oakland 45 and
            50, and 6575 Snowdrift Road, and of which $1,583,000 is held by PNC
            Bank (formerly known as Midlantic Bank) and encumbers 110 Summit
            Drive, it being agreed that no such existing recourse secured debt
            will be extended, renewed or refinanced in whole or in part other
            than on a non-recourse basis (subject to the usual and customary
            exculpation carveouts of institutional lenders) and otherwise in
            compliance with the provisions of this paragraph hereinafter set
            forth, and to incur other non-recourse secured debt (all such
            secured debt whether existing on the date of the closing of the
            Credit Facility or incurred thereafter is herein collectively
            referred to as "Other Secured Debt"), provided that (i) the net
            proceeds (i.e., the gross proceeds of any such Other Secured Debt
            less the usual and ordinary arms-length third party costs and
            expenses incurred by Borrowers in obtaining the same as
            substantiated by evidence reasonably satisfactory to Co-Lenders) of
            any Other Secured Debt which is incurred after the date of the
            closing of the Credit Facility shall be used to reduce the
            outstanding Principal Balance of the Credit Facility before being
            used for any other purpose, (ii) the incurrence of such Other
            Secured Debt shall not cause a default or Event of Default to occur
            under the Credit Facility Documents, and (iii) each loan
            constituting Other Secured Debt and which closes after the date of
            the closing of the Credit Facility (inclusive of any existing
            secured non-recourse or existing secured recourse debt hereinabove
            referred to which is refinanced or extended after the date of the
            closing of the Credit Facility) shall bear interest at a market
            interest rate, shall have an initial maturity of not less than five
            (5) years after the date of its closing and funding, shall have a
            loan to value ratio of not LESS than fifty (50%), shall be
            non-recourse (subject to the usual and customary exculpation
            carveouts of institutional lenders) and shall otherwise be on terms
            and conditions which are generally applicable to comparable secured
            indebtedness, and (v) the conditions set forth in the following
            sentence of this paragraph shall otherwise be complied with, and (B)
            Borrowers shall be permitted to incur up to, but not in excess of
            $5,000,000 of unsecured recourse debt ("Other Unsecured Debt")
            provided that (i) the incurrence of such Other Unsecured Debt, shall
            not cause a default to occur under the Credit Facility Documents,
            and (ii) the conditions set forth in the following sentence of this
            paragraph shall otherwise be complied with. In addition to the
            conditions set forth in the preceding sentence, (i) no such Other
            Secured Debt or Other


                                       28
<PAGE>   33
            Unsecured Debt (collectively, "Other Debt") shall be secured in
            whole or in part by the Properties and any other Collateral, (ii)
            the Supplemental Debt Service Coverage Ratio, the Fixed Charge
            Coverage Ratio and the Debt-to-Tangible Net Worth Requirement shall
            continue to be complied with both before and after the incurring of
            any such Other Debt, (iii) Borrowers shall inform Agent in advance
            of their intention to incur any such Other Debt and shall provide to
            Co-Lenders with a term sheet setting forth the terms and conditions
            which will pertain to any such Other Debt, and such other
            information with respect thereto as shall be requested by
            Co-Lenders, (iv) all of the other affirmative and negative covenants
            and representations and warranties contained in the Credit Facility
            Documents shall continue to be complied with both before and after
            the incurring of any such Other Debt by Borrowers, and (v)
            Co-Lenders shall be satisfied that such Other Debt will not have a
            materially adverse effect on Borrowers, or their ability to perform
            their obligations under the Credit Facility Documents, or on
            collateral for the Credit Facility. Any Other Debt retained, assumed
            or incurred by Borrowers in compliance with the provisions of the
            preceding provisions of this subparagraph is herein referred to as
            "Other Permitted Debt". The incurrence of any Other Debt in
            contravention of the provisions of this subparagraph shall
            constitute an immediate "Event of Default" under this Agreement. It
            is also agreed that the earliest to occur of any one of the
            following events in respect of Other Permitted Debt shall constitute
            an immediate "Event of Default" under this Agreement:

                        (a) if any default shall occur and be continuing in
                  respect of any Other Permitted Debt and the holder thereof has
                  declared an "event of default" in respect thereof, or has
                  accelerated the payment thereof or has otherwise exercised any
                  right or remedy which it may have as a result of the
                  occurrence of such "event of default";

                        (b) if any default shall occur in respect of any Other
                  Permitted Debt, and irrespective of whether such default
                  constitutes, or would, but for notice or the lapse of time, or
                  both, constitute, an "event of default" in respect thereof,
                  and either (x) Borrowers shall fail to inform Co-Lenders of
                  the occurrence of such default within five (5) business days
                  after they have received notice of such default or otherwise
                  have actual knowledge that such default has occurred, or (y)
                  Borrowers shall fail in the case of any such default which can
                  be cured by the payment of a sum of money to effect a cure
                  thereof within five (5) days after the giving of such notice
                  to Co-Lenders, or (z) Borrowers shall fail in the case of any
                  such default which can not be cured by the payment of a sum of
                  money to effect a cure thereof with twenty (20) days after
                  giving such notice to Co-Lenders, provided, however, that if
                  such default can not in the exercise of due diligence
                  reasonably be cured within such twenty (20) day period, such
                  default shall not constitute an "Event of Default" under this
                  Agreement so long as Borrowers commence to cure such default
                  within such twenty (20) day period and thereafter diligently
                  take all steps to effect a cure thereof, as promptly as
                  possible, but in no event later than eighty (80) days after
                  the giving of such notice to Co-Lenders, failing which such
                  default shall constitute an immediate "Event of Default" under
                  this Agreement.


                                       29
<PAGE>   34
                        (z) At all times to maintain Cash Flow at a level
            sufficient to provide at least 1.65x debt service coverage on the
            Credit Facility Outstanding (the "Minimum Debt Service Coverage
            Ratio"). For the purpose of determining compliance with the "Minimum
            Debt Service Coverage Ratio"), the aggregate Cash Flow of the
            Properties in collateral pool for the Credit Facility shall (except
            as otherwise hereinafter specifically provided to the contrary in
            this paragraph) be determined on a trailing four (4) calendar
            quarter basis and on a Property by Property basis in the same manner
            as is set forth in paragraph 13 of this Agreement (except that for
            the purposes of this paragraph only the annual capital and leasing
            reserve of fifty cents ($.50) per square foot referred to in
            paragraph 13 of this Agreement will not be deducted from the
            respective earnings of such Properties as is the case for the
            purposes of paragraph 13 of this Agreement), which Property by
            Property determination will then be aggregated to determining total
            aggregate Cash Flow of the Properties, and annual debt service on
            the Credit Facility Outstanding shall insofar as the outstanding
            Principal Balance of Credit Facility is concerned be deemed to be
            equal to the greater of (x) the outstanding Principal Balance of the
            Credit Facility, as of the date of determination, multiplied by the
            weighted average interest rate applicable to the Credit Facility on
            the date of determination (which weighted average interest rate
            shall be determined on the basis of the interest rates applicable to
            the outstanding Principal Balance of the Credit Facility on the date
            of determination and the relative portions of such outstanding
            Principal Balance to which such interest rates apply), and (y) the
            annual debt service which would be payable on a 25 year fully
            amortizing loan closing on the date of determination in an amount
            equal the outstanding Principal Balance of the Credit Facility on
            such date and bearing interest at a per annum rate equal to 180
            basis points over prevailing rates on ten year U.S. Treasury
            Obligations on such date. If a Property constituting part of the
            collateral pool for the Credit Facility has on the date of any
            determination of compliance with the Minimum Debt Service Coverage
            Ratio been owned by Borrowers for less than a complete calendar
            quarter, the "Cash Flow" of such Property shall be determined by
            pro-forming on an annual basis the aggregate annual rents payable
            under Leases in effect at such Property as of the date of
            determination, and on the basis of actual expenses incurred during
            the partial calendar quarter in question, as annualized and
            appropriately adjusted to reflect expenses such as taxes and
            insurance premiums which are accrued in a manner satisfactory to
            Co-Lenders and otherwise consistent with the provisions of paragraph
            13 of this Agreement. If a Property has been owned for at least one
            full calendar quarter, but less than four calendar quarters, on the
            date of any determination of compliance with the Minimum Debt
            Service Coverage Ratio, the Cash Flow of such Property shall be
            determined by annualizing the actual earnings of such Property for
            the complete calendar quarters during which such Property has been
            owned, and on the basis of actual expenses incurred during such
            calendar quarters as annualized and appropriately adjusted to
            reflect annual expenses such as taxes and insurance premiums which
            are accrued in a manner satisfactory to Co-Lenders and otherwise in
            a manner consistent with the provisions of paragraph 13 of this
            Agreement. If at any time the Minimum Debt Service Coverage Ratio
            shall cease to be satisfied, Borrowers shall within ten (10)
            business days after demand by Agent either (a) reduce the
            outstanding Principal Balance of the Credit Facility by an amount
            sufficient to restore compliance with the Minimum Debt Service
            Coverage Ratio, or (b) deliver to Agent additional collateral for
            the Credit Facility


                                       30
<PAGE>   35
            consisting of unencumbered improved property which is satisfactory
            to Co-Lenders and sufficient in the opinion of Co-Lenders to restore
            compliance with the Minimum Debt Service Coverage Ratio.

                        (aa) At all times to maintain Total Earnings at a level
            sufficient to provide at least 2.0x debt service coverage on the
            Credit Facility Outstanding and on Other Permitted Debt (the
            "Supplemental Debt Service Coverage Ratio). For the purpose of
            determining compliance with the Supplemental Debt Service Coverage
            Ratio, Total Earnings shall (except as otherwise provided to the
            contrary in EXHIBIT A to this Agreement) be determined on a trailing
            four (4) calendar quarter basis, and annual debt service on the
            Credit Facility Outstanding and on Other Permitted Debt (A) shall
            insofar as the outstanding Principal Balance of Credit Facility is
            concerned be deemed to be equal to the greater of (x) the
            outstanding Principal Balance of the Credit Facility, as of the date
            of determination, multiplied by the weighted average interest rate
            applicable to the Credit Facility on the date of determination, and
            (y) the annual debt service which would be payable on a 25 year
            fully amortizing loan closing on the date of determination in an
            amount equal the outstanding Principal Balance of the Credit
            Facility on such date and bearing interest at a per annum rate equal
            to 180 basis points over prevailing rates on ten year U.S. Treasury
            Obligations on such date (which weighted average interest rate shall
            be determined on the basis of the interest rates applicable to the
            outstanding Principal Balance of the Credit Facility on the date of
            determination and the relative portions of such outstanding
            Principal Balance to which such interest rates apply), and (B) shall
            insofar as Other Permitted Debt is concerned be equal to the actual
            per annum debt service payable on Other Permitted Debt, as of the
            date of determination. If at any time the Supplemental Debt Service
            Coverage Ratio shall cease to be satisfied, Borrowers shall within
            ten (10) business days after demand by Agent reduce the outstanding
            principal balance of the Credit Facility by an amount sufficient to
            restore compliance with the Supplemental Debt Service Coverage
            Ratio.

                        (bb) At all times to maintain a fixed charge coverage
            ratio of at least 1.75x (the "Fixed Charge Coverage Ratio"). The
            Fixed Charge Coverage Ratio shall (except as otherwise provided to
            the contrary in EXHIBIT A in this Agreement) be determined on a
            trailing four (4) calendar quarter basis, and shall be equal to the
            Total Earnings for the period in question divided by the actual debt
            service (inclusive of interest, amortization payments and letter of
            credit fees) payable on the Credit Facility and all Other Permitted
            Debt during the period in question plus actual capital expenditures
            (with the exception of capital expenditures that are related to
            newly acquired properties irrespective of whether constituting part
            of the collateral pool for the Credit Facility and either (x)
            escrowed with another lender, the seller of such property, a title
            company or other independent third party escrow agent at the time of
            acquisition, or (y) expended within 90-days after such acquisition).
            If at any time the Fixed Charge Coverage Ratio shall cease to be
            satisfied, Borrowers shall within ten (10) business days after
            demand by Agent reduce the outstanding Principal Balance of the
            Credit Facility by an amount sufficient to restore compliance with
            the Fixed Charge Coverage Ratio. If Borrowers so reduce the
            outstanding Principal Balance of the Credit Facility, Co-Lenders
            shall on the date of such reduction confirm compliance with the
            Fixed Charge Coverage Ratio by retesting such compliance by dividing
            the Total Earnings for the period in question (i.e., the four (4)
            calendar quarters


                                       31
<PAGE>   36
            preceding the re-test date) by an amount equal to the aggregate of
            (i) the Principal Balance of the Credit Facility as so reduced
            multiplied by the weighted average interest rate applicable to the
            outstanding Principal Balance of the Credit Facility on the re-test
            date (as determined on the basis of the actual number of days
            elapsed [i.e., 365 days] over a 360 day year, and on the basis of
            the interest rates applicable to the outstanding Principal Balance
            of the Credit Facility on the date of determination and the relative
            portions of such outstanding Principal Balance to which such
            interest rates apply), (ii) the per annum debt service which is
            payable on all Other Permitted Debt, as of the re-test date, and
            (iii) the capital expenditures hereinabove referred to in the first
            sentence of this subparagraph and which were actually incurred
            during the four calendar quarters preceding the re-test date.

                        (cc) At all times to maintain a maximum debt-to-tangible
            net worth of 1.0x (the "Debt-to-Tangible Net Worth Requirement").
            The Debt-to-Tangible Net Worth Requirement shall be determined by
            dividing any and all of Borrowers' indebtedness (including, without
            limitation, the Credit Facility Outstanding, the Other Permitted
            Debt and contingent liabilities under any outstanding guarantees to
            which any of the Borrowers is a party) by the Tangible Net Worth of
            Borrowers. The "Tangible Net Worth" of Borrowers shall be determined
            in accordance with GAAP and shall include the value of all assets
            (other than intangible assets owned by Borrowers) minus the total
            liability of Borrowers (excluding provisions for deferred taxes). If
            at any time the Debt-to-Tangible Net Worth Requirement shall cease
            to be satisfied, Borrowers shall within ten (10) business days after
            demand by Agent reduce the outstanding Principal Balance of the
            Credit Facility by an amount sufficient to restore compliance with
            the Debt-to-Tangible Net Worth Requirement. Notwithstanding anything
            to the contrary contained in this Agreement, and for the purpose of
            determining compliance with the Debt-to-Tangible Net Worth
            Requirement and other financial covenants set forth in this
            Commitment, in determining the value of Borrowers' investment in any
            joint venture, partnership, limited liability company or other
            comparable entity which is not already consolidated into Borrowers'
            financial statements, such value shall be determined taking into
            account the total equity interest owned in such joint venture,
            partnership, limited liability company or other comparable entity
            and the portion of the debt (whether secured or unsecured)
            encumbering the assets of such joint venture, partnership, limited
            liability company or other comparable entity or otherwise incurred
            by such joint venture, partnership, limited liability company or
            other comparable entity which is allocable to Borrowers' equity
            interest in such joint venture, partnership, limited liability
            company or other comparable entity or which otherwise constitutes
            the recourse obligation of any one or more of the Borrowers.

                        (dd) Borrowers shall not acquire unimproved land unless
            each of the following conditions is satisfied: (i) if such
            unimproved land is adjacent to and contiguous with an improved
            property being acquired by Borrowers (irrespective of whether such
            improved property will constitute part of the collateral pool for
            the Credit Facility), the total purchase price being paid for such
            improved property and unimproved land after allocating 100% of the
            purchase price to the improved property and 0% of the purchase price
            to the adjacent and contiguous unimproved land shall be comparable
            to the purchase prices paid for comparable improved


                                       32
<PAGE>   37
            properties which have been acquired by Borrowers and/or third
            parties in the same market; (ii) if such land is not adjacent to and
            contiguous with an improved property being acquired by Borrowers,
            Borrowers shall represent to Co-Lenders that they are acquiring such
            unimproved land with the intention of commencing the Development
            thereof within six (6) months of acquisition thereof; (iii) in the
            case of unimproved land being acquired either pursuant to clause (i)
            or (ii), Borrowers shall have prepared a comprehensive plan for the
            Development of such unimproved land, which plan shall be subject to
            review and approved by Co-Lenders, which review and approval shall
            not be unreasonably withheld or delayed, and Co-Lenders shall be
            reasonably satisfied that Borrowers will remain in compliance with
            all of the terms, covenants and provisions of this Agreement after
            such unimproved land is acquired and upon the commencement, and
            during and after the completion of, construction of the Development
            of the same (including, without limitation, the financial covenants
            set forth in paragraph 13 and paragraph 23 of this Agreement, and
            the requirements of subparagraph (ee) below; and (iv) the
            acquisition of any such unimproved land is otherwise approved by
            Co-Lenders, which approval shall not be unreasonably withheld. Any
            unimproved land which is adjacent to a Property constituting part of
            the Collateral for the Credit Facility will, at the election of
            Co-Lenders, become part of the Collateral for the Credit Facility.
            The value of unimproved land will not be taken into account for the
            purpose of determining compliance with the Loan to Value
            Requirement.

                        (ee) Borrowers shall not at any time during the term of
            the Credit Facility have under Development or further Development
            unimproved land or improved properties (irrespective of whether
            constituting part of the collateral pool for the Credit Facility)
            for their account unless (i) the total cost which will be incurred
            upon completion of all such Development (inclusive of land costs)
            and whether under construction or contemplated or intended to be
            under construction in the future shall not at any given time during
            the term of Credit Facility more than $25,000,000, (ii) prior to the
            commencement of construction of each such Development, such
            Development shall be at least 50% pre-leased on generally accepted
            market terms and all required permits and approvals for such
            Development shall have been issued or obtained from the applicable
            governmental authorities, and (iv) each such Development shall
            otherwise be similar in type, quality and location to the existing
            portfolio of improved properties owned by Borrowers, it being
            understood that the purchase price paid for unimproved land which is
            acquired pursuant to clause (ii) of subparagraph (dd) above shall be
            included for the purpose of determining compliance with the
            $25,000,000 limitation set forth in clause (i) of this subparagraph
            (ee) irrespective of whether construction of the contemplated
            Development thereon has actually commenced, and that the acquisition
            of unimproved land which is not adjacent and contiguous to improved
            property being acquired by Borrowers shall be deemed in and of
            itself to be a Development in progress for the purpose of
            determining compliance with the $25,000,000 limitation set forth in
            clause (i) of this subparagraph (ee) irrespective of whether
            construction of the contemplated Development thereon has commenced.
            The cost of constructing a Development on unimproved land which is
            adjacent and contiguous to improved property acquired by Borrowers
            shall not be considered for the purposes of the $25,000,000
            limitation set forth in clause (i) of this subparagraph (ee) until
            construction of such Development actually commences.


                                       33
<PAGE>   38
                        (ff) BRT will at all times maintain (i) its REIT status
            under the Internal Revenue Code, and (ii) its status as a public
            company whose stock is listed on a nationally-recognized exchange or
            is a NASDAQ security.

                        (gg) The dividend payout ratio of BRT (dividends paid
            divided by funds from operations, as defined by NAREIT), and as
            determined on a trailing twelve month basis, shall at all times be
            less than 90%. Notwithstanding the foregoing, the actual dividend
            payout may exceed the foregoing dividend payout ratio restriction if
            required in order to maintain BRT's status as a REIT under the
            Internal Revenue Code.

                        (hh) From and after December 31, 1996, the aggregate
            Approved Value of all Properties from time to time constituting part
            of the collateral pool for the Credit Facility shall at all times be
            equal to or in excess of $75,000,000.

                        (ii) At no time during the term of the Credit Facility
            shall any individual Property constituting part of the collateral
            pool for the Credit Facility have an Approved Value in excess of 15%
            of the aggregate Approved Value of all Properties constituting part
            of the collateral pool for the Credit Facility.

                        (jj) Borrowers will not without the prior consent of
            Co-Lenders assume, guaranty, endorse or otherwise become directly or
            contingently liable for the debts or obligations of any other
            person, party or entity, except by reason of endorsement of
            negotiable instruments for deposit or collection in the ordinary
            course of business.

                        (kk) The average occupancy of all of the Properties
            constituting part of the collateral pool for the Credit Facility
            from time to time shall at no time during the term of the Credit
            Facility be less than 85% as of the last day of any two consecutive
            calendar quarters during the term of the Credit Facility, it being
            agreed that this covenant shall not be breached unless the average
            occupancy of all of the Properties constituting part of the
            collateral pool for the Credit Facility from time to time shall as
            of the last day of any two consecutive calendar quarters during the
            terms of the Credit Facility be less than 85%. Occupancy shall mean
            space in the Properties constituting part of the collateral pool for
            the Credit Facility which is occupied by tenants who in each case
            are not in default in the payment of rent under their respective
            leases. For the purpose of determining compliance with this covenant
            not more than 15,000 square feet in the aggregate of headquarters
            space in the Properties which is occupied by Borrowers or by the
            respective Affiliates or subsidiaries of Borrowers shall be
            considered to constitute occupied space in the Properties.

                        (ll) Borrowers shall pay all fees, commissions, costs,
            charges, taxes and other expenses incurred by Co-Lenders in the
            extension of the Credit Facility and in connection with the
            preparation, execution and delivery of this Agreement and the other
            Credit Facility Documents, including, without limitation, reasonable
            attorneys' fees, appraisal fees, fees and expenses incurred in
            accounting review and fees and expenses relating to examination of
            title, title insurance premiums, surveys, hazard insurance and
            mortgage recording, documentary, intangible, transfer or other
            similar taxes, revenue stamps and all recording fees and charges.
            Co-Lenders shall cooperate with Borrowers in an


                                       34
<PAGE>   39
            attempt to minimize the aforementioned costs and expenses, provided,
            however, that nothing contained herein shall require Co-Lenders to
            compromise their respective underwriting standards and requirements.

                        (mm) Co-Lenders shall not be required to pay any
            brokerage fees or commissions or other remuneration of any nature
            whatsoever arising from the extension of the Credit Facility or the
            funding of the Credit Facility and Borrowers agrees to defend,
            indemnify and hold Co-Lenders harmless, from and against any and all
            such claims in connection therewith which are asserted by any broker
            with whom Borrowers has or is alleged to have dealt in connection
            with the Credit Facility.

                        (nn) Borrowers shall not assign this Agreement by
            agreement, operation of law or otherwise, or the moneys to be
            advanced and disbursed hereunder without the prior written consent
            of Co-Lenders, which consent may be withheld by Co-Lenders in the
            exercise of their sole and absolute discretion.

                        (oo) Borrowers shall immediately commence (subject to
            the existence of materially adverse weather conditions), and shall
            complete or cause to be completed, within ninety (90) days from the
            date hereof (but in no event later than June 30, 1997 if the
            commencement date is extended due to the existence of materially
            adverse weather conditions), all "immediate repairs", if any set
            forth on Schedule 4 attached to this Agreement. Promptly after
            completion of all such "immediate repairs", Borrowers shall deliver
            evidence satisfactory to Agent substantiating compliance with the
            provisions of this subparagraph.

Continuing compliance with the covenants set forth in paragraph 13 of this
Agreement and in subparagraphs (a), (w), (y), (z), (aa), (bb), (cc), (ee), (gg),
(hh) and (kk) of this paragraph shall be subject to confirmation by Co-Lenders
at the end of each calendar quarter during the term of the Credit Facility, it
being agreed that Borrowers shall provide to Co-Lenders not later than forty
five (45) days after the end of each calendar quarter during the term of the
Credit Facility with such information and evidence as Co-Lenders shall
reasonably request in connection with the confirmation of such compliance,
together with a detailed calculation by Borrowers of the actual level of
compliance by Borrowers with each such covenant. In addition, Borrowers shall
furnish to Co-Lenders not later than forty five (45) following the end of each
calendar quarter during the term of the Credit Facility with a certificate
signed by the chief executive officer or chief financial officer of BRT
certifying to Co-Lenders that Borrowers are in compliance with all of the terms,
covenants and conditions set forth in the Credit Facility Documents (including,
without limitation, those set forth in this paragraph) and that the
representations and warranties set forth in this Agreement and the other Credit
Facility documents continues to be true and correct in all material respects
(other than as specifically disclosed to Co-Lenders to the contrary in writing
in accordance with the provisions of the last sentence of paragraph 22 of this
Agreement).

            24.  Recourse Obligations.  Borrowers' obligations in respect of
the Credit Facility shall constitute the full joint and several recourse
obligations of Borrowers.

            25. Syndication of Credit Facility. Borrowers acknowledge that (i)
Smith Barney intends after the date of this Agreement (and in consultation with
NationsBank) to sell and assign and/or transfer direct interests in the portion
of the Credit Facility held by Initial Co-Lenders to one or more domestic or
foreign banks, insurance companies, pension funds, trusts or other


                                       35
<PAGE>   40
institutional lenders as may be selected by Smith Barney and NationsBank in
their sole and absolute discretion (any such bank, insurance companies, pension
funds, trusts or other institutional lenders to whom a direct interest in the
Credit Facility is sold and assigned and/or transferred in accordance with the
foregoing provisions of this paragraph or in accordance with the provisions of
this paragraph hereinafter set forth is herein collectively referred to,
together with Initial Co-Lender, as Co-Lenders and individually as a Co-Lender,
and shall be treated in all respects as a Co-Lender under this Agreement and the
other Credit Facility Documents, all with the same force and effect as if an
original party thereto). Co-Lenders also reserve the right to sell and assign
conventional participation interests in the Credit Facility to such domestic or
foreign banks, insurance companies, pension funds, trusts or other institutional
lenders or other Persons or investors (including, but not limited to, grantor
trusts, owner trusts, special purpose corporations or other similar or
comparable investment vehicles, but specifically excluding REMICS, FASITs and
real estate investment trusts) as may be selected by Co-Lenders in their sole
and absolute discretion and on terms and conditions satisfactory to Co-Lenders
in their sole and absolute discretion (any such bank, insurance company, pension
fund, trust or other institutional lender or other Person or investor to whom a
conventional participation interest in the Credit Facility is so sold and
assigned being herein referred to as a "Participant"). Borrowers expressly
acknowledge and agree that (i) each Co-Lender holding a direct interest in the
Credit Facility shall directly assume the obligation to fund, and shall have the
sole responsibility to fund, its Credit Facility Percentage Interest in each
advance of the Credit Facility which is made, or required to be made, by
Co-Lenders in accordance with the provisions of this Agreement, (ii) the
obligation and liabilities of Co-Lenders are several obligations and liabilities
and not joint and several obligations and liabilities, (iii) Agent shall from
time to time issue to Borrowers a Co-Lenders certificate in the form of EXHIBIT
L attached hereto (the "Co-Lenders Certificate"), which Co-Lenders Certificate
shall set forth the identity of Co-Lenders from time to time and their
respective Credit Facility Percentage Interests, each of which Co-Lenders
Certificate shall be conclusive and binding upon Borrowers, (iv) Borrowers shall
not have the right under any fact or circumstance to look to any other party,
including, without limitation, any other Co-Lender, for the funding of the
portion of the Credit Facility which is required to be funded by a particular
Co-Lender in accordance with this Agreement and as set forth in the most recent
Co-Lenders Certificate if such Co-Lender shall default in doing so, all risk of
such loss being directly assumed in all respects by Borrowers. If a Co-Lender
shall sell a conventional participation interest in the portion of the Credit
Facility held by it, Borrowers shall have no obligation to look to any Person
other than such Co-Lender for the funding of any portion of the Credit Facility
in which such Co-Lender has sold and assigned to a Participant a conventional
participation interest, it being agreed that the provisions of the preceding
sentence of this paragraph shall not be applicable to any conventional
participation interest in the Credit Facility which is sold and assigned by a
Co-Lender to a Participant. Borrowers shall cooperate, and shall cause each
Guarantor, indemnitor and other Person associated or connected with the Credit
Facility or the Collateral therefor to cooperate, in all respects with
Co-Lenders in connection with the sale of direct interests and conventional
participation interests in the Credit Facility in the manner contemplated by
this paragraph, and shall, in connection therewith, execute and deliver such
estoppels, certificates, instruments and documents as may be requested by Smith
Barney, including, without limitation, substitute Credit Facility Notes to
evidence the respective portions of a Co-Lender's interest which is sold and
which is retained and such other documents and instruments as are required to
effect the assumption by each Co-Lender of the direct obligation to fund the
portion of the Credit Facility held by it. Co-Lenders shall return to Borrowers
any Credit Facility Note with respect to which substitute Credit Facility Notes
are executed by Borrowers in accordance with the preceding provisions of this
paragraph, which replaced Credit Facility


                                       36
<PAGE>   41
Note shall, prior to being returned to Borrowers, be marked "cancelled and
replaced pursuant to paragraph 25 the Credit Agreement". Borrowers grant to
Co-Lenders, and shall cause each Guarantor, indemnitor and other Person
associated or connected with the Credit Facility or the Collateral therefor to
grant to Co-Lenders, the right to distribute on a confidential basis financial
and other information concerning Borrowers, each Guarantor and each such
indemnitor and other Person and the Properties encumbered by the Mortgages and
other pertinent information with respect to the Credit Facility to any party who
has purchased a direct interest or conventional participation interest in the
Credit Facility or who has expressed a serious interest in purchasing a direct
interest or conventional participation interest in the Credit Facility. The
policies of title insurance insuring the respective liens of the Mortgages shall
be assignable by Co-Lenders and Agent in connection with any sale, assignment or
syndication of the Credit Facility, and Borrowers shall be obligated to pay any
additional insurance premiums which may become due as the result of the
assignment of the title insurance policies in connection with any such sale,
assignment or syndication of the Credit Facility (including, without limitation,
any premium which may become due as a result of any endorsement to the title
insurance policy naming the holder(s) of any interest therein subsequent to any
such sale, assignment or syndication as named insured(s) in the title insurance
policies). Borrowers shall reimburse Smith Barney upon demand for all costs
incurred by Smith Barney in connection with the syndication of the Credit
Facility (including reasonable attorneys' fees), it being understood that (i)
Smith Barney shall, unless otherwise agreed to by Smith Barney, have the
exclusive right to effect a syndication of direct interests in the Credit
Facility, and (ii) 100% of any such syndication by Smith Barney shall be
transferred on a pari passu basis from Initial Co-Lenders respective Credit
Facility Percentage Interests unless otherwise mutually agreed by Initial
Co-Lenders to the contrary. Smith Barney and NationsBank shall have the right at
any time in their sole and absolute discretion and without obtaining the prior
approval or consent of Borrowers to permit other Co-Lenders to sell and assign
and/or transfer direct interests in the Credit Facility on such terms and
conditions as shall be acceptable to Smith Barney and NationsBank, and otherwise
on the terms and conditions hereinabove set forth in this paragraph and in the
Co-Lenders Agreement and which are applicable in connection with any such sale
and assignment and/or transfer of a direct interest in the Credit Facility by
Smith Barney. If Borrowers shall default in the performance of its obligation as
set forth in this paragraph, and if such default shall not be remedied by
Borrowers within ten (10) days after notice by Smith Barney and NationsBank,
Smith Barney and NationsBank shall acting together have the absolute and
unconditional right to declare the Credit Facility immediately due and payable.
Notwithstanding anything to the contrary in this paragraph, (i) Smith Barney
and/or The Travelers Insurance Corporation, a Connecticut insurance corporation
and an affiliate of Smith Barney, shall at all times during the term of the
Credit Facility (and provided that no Event of Default has occurred and is
continuing) hold not less than a $15,000,000 direct interest in the maximum
committed amount of the Credit Facility, and (i) NationsBank and/or and an
affiliate of NationsBank, shall at all times during the term of the Credit
Facility (and provided that no Event of Default has occurred and is continuing)
hold not less than a $15,000,000 direct interest in the Credit Facility, it
being understood and agreed that nothing contained in this sentence shall be
deemed to restrict the ability of Smith Barney, The Travelers Insurance Company,
NationsBank or any such affiliate of NationsBank to assign conventional
participation interests in their respective retained direct interests in Credit
Facility. Agent shall use its best efforts to inform Borrowers of each sale of a
direct interest in the Credit Facility promptly after the same occurs, but shall
in no event have any liability for failing to do so.

            26. Interest Rate Protection Agreements. Borrowers shall be
permitted to enter into interest rate swap and cap agreements with respect to


                                       37
<PAGE>   42
the Credit Facility and with respect to Other Permitted Debt provided that (i)
Borrowers notifies Agent of its intention to do so prior to entering into any
such agreement, (ii) Co-Lenders shall be satisfied with the counter-party to any
such swap or cap agreement, (iii) any such agreement which has the effect of
fixing the interest rate, or setting a minimum and/or maximum interest rate,
with respect to the Credit Facility or with respect to Other Permitted Debt
shall be taken into account in determining compliance with the Minimum Debt
Service Coverage Ratio, the Supplemental Debt Service Coverage Ratio and the
Fixed Charge Coverage Requirement, (iv) no such agreement shall be secured by
any Property or any Collateral, and (v) each such agreement which pertains to
the Credit Facility shall be assigned by Borrowers to Agent as additional
Collateral for the Credit Facility.

            27. Right of Entry. Agent, Co-Lenders and their respective employees
and agents shall have the right, upon reasonable prior notice to Borrowers and
subject to the rights of lessee and tenants to enter and inspect the Properties
at all reasonable times.

            28. Books and Records. Borrowers will keep and maintain or will
cause to be kept and maintained on a fiscal year basis in accordance with
generally accepted accounting practices consistently applied proper and accurate
books, records and accounts reflecting all of the financial affairs of
Borrowers, and all items of income and expense in connection with the operation
of the Properties or in connection with any services, equipment or furnishings
provided in connection with the operation of the Properties, whether such income
or expense be realized by Borrowers or any other Person excepting lessees
unrelated to and unaffiliated with Borrowers who have leased from Borrowers
portions of any Properties for the purpose of occupying the same. Co-Lenders and
their respective employees and agents shall have the right from time to time
upon not less than one (1) business day's prior notice and at all times during
normal business hours to examine such books, records and accounts at the offices
of Borrowers or other Person maintaining such books, records and accounts and to
make copies or extracts thereof as Co-Lenders, or their respective employees or
agents shall desire. Co-Lenders shall also have the right upon reasonable notice
and during normal business hours to conduct an audit of the books and records of
Borrowers, which audit may be performed by an independent certified public
accountant selected and retained by Co-Lenders. If such audit is conducted by
Co-Lenders subsequent to the occurrence of a default under any of the Credit
Facility Documents or if the results of such audit discloses a material
discrepancy from the information previously provided by Borrowers irrespective
of whether or not such audit was conducted subsequent to the occurrence of a
default under the Credit Facility Documents, then the cost of such audit shall
be borne by Borrowers, shall be paid by the Borrowers within ten (10) days after
request by Agent and shall constitute part of the Debt. The obligation of
Borrowers to pay the aforementioned audit costs pursuant to this paragraph shall
be secured by the Mortgages and the other Credit Facility Documents. Except as
otherwise set forth in this paragraph, the cost of any audit conducted hereunder
shall be paid by Co-Lenders. Borrowers shall furnish or cause to be furnished to
each Co-Lender each of the following:

                        (i) annually, within ninety (90) days next following the
            end of each calendar year during the term of the Credit Facility,
            individual and consolidated unaudited financial and operating
            statements in the form attached hereto as EXHIBIT M covering the
            operation of each of the Properties from time to time constituting
            part of the Collateral for the Credit Facility for such calendar
            year, which financial and operating statements shall show the actual
            performance of each of the Properties from time to time constituting
            part of the Collateral for the Credit Facility for the immediately
            preceding calendar year and shall otherwise be in form and substance
            reasonably satisfactory to Co-Lenders.


                                       38
<PAGE>   43
                        (ii) annually, within ninety (90) days next following
            the end of each calendar year during the term of the Credit
            Facility, complete executed copies of annual audited consolidated
            and annual unaudited consolidating financial statements in the form
            attached hereto as EXHIBIT N for each Borrowers and Guarantors for
            such calendar year, and containing a fully itemized statement of
            profit and loss and of surplus and a balance sheet.

                        (iii) individual and consolidated operating and capital
            expenditure budgets for each calendar year during the term of Credit
            Facility pertaining in the form attached hereto as EXHIBIT O and
            covering each of the Properties from time to time constituting part
            of the Collateral for the Credit Facility. The 1997 budgets shall be
            submitted prior to January 31, 1997, and the budgets for subsequent
            calendar years shall be due not later than 30 days prior to
            beginning of such calendar year during the term of the Credit
            Facility.

                        (iv) quarterly (unless otherwise requested by Agent more
            frequently than quarterly, but in no event more frequently than
            monthly) not later than forty five (45) days after the end of each
            calendar quarter (or such shorter period of time if requested more
            frequently than quarterly) during the term of the Credit Facility,
            quarterly unaudited individual and consolidated operating statements
            in the form attached hereto as EXHIBIT P covering each of the
            Properties from time to time constituting part of the Collateral for
            the Credit Facility, reconciled on a quarterly basis to the then
            current annual individual and consolidated operating budgets for the
            Properties;

                        (v) copies of all other quarterly and annual filings of
            Borrowers with the Securities and Exchange Commission and other
            publicly released information concurrent with such filing or public
            releases.

                        (vi) Such other information with respect to Borrowers,
            Guarantors, the properties and assets owned by Borrowers
            (irrespective of whether constituting part of the collateral pool
            for the Credit Facility) and by Guarantors and the respective
            subsidiaries and Affiliates of Borrowers and Guarantors as may be
            reasonably requested by Co-Lenders.

All audited financial statements required to be prepared pursuant to the
provisions of this paragraph shall be prepared and certified by an independent
certified public accountant acceptable to Co-Lenders, shall be prepared in
accordance with GAAP, and shall be in form and substance satisfactory to
Co-Lenders. All unaudited financial statements delivered to Co-Lenders pursuant
to the provisions of this paragraph shall be certified to be true and correct in
all material respects by the chief financial officer or the chief executive
officer of BRT. Borrowers shall furnish to Co-Lenders within forty five (45)
days next following the end of each calendar quarter during the term of the
Credit Facility, a certificate signed by the chief financial officer or the
chief executive officer of BRT certifying on the date thereof either that there
does or does not exist an event which constitutes, or which upon notice or lapse
of time or both would constitute, a default or an Event of Default under any of
the Credit Facility Documents, and if such default or Event of Default exists,
the nature thereof and the period of time it has existed.

            29. Taxes. Borrowers shall pay, or cause to be paid, all taxes,
assessments, water rates, sewer rents and other charges, including vault charges
and license fees for the use of vaults, chutes and similar areas adjoining the
Premises, now or hereafter levied or assessed against the


                                       39
<PAGE>   44
Properties (the "Taxes") prior to the date upon which any fine, penalty,
interest or cost may be added thereto or imposed by law for non-payment thereof.
Borrowers shall deliver to Co-Lenders, upon request, receipted bills, cancelled
checks, and other evidence satisfactory to Co-Lenders evidencing the payment of
the Taxes prior to the date upon which any fine, penalty, interest or cost may
be added thereto or imposed by law for the non-payment thereof. Co-Lenders shall
have the right in their discretion to maintain a tax services contract with
respect to the Properties with a tax reporting agency satisfactory to
Co-Lenders. Borrowers shall reimburse Co-Lenders upon demand for the cost of
maintaining such tax service contract during the term of the Credit Facility.
After prior notice to Co-Lenders, in the case of any material item, Borrowers,
at its own expense, may contest by appropriate legal proceeding, promptly
initiated and conducted in good faith and with due diligence, the amount or
validity or application in whole or in part of any of the Taxes, provided that
(i) no default shall have occurred and shall be continuing under the Credit
Facility Notes, the Mortgages, this Agreement or any of the other Credit
Facility Documents, (ii) Borrowers is permitted to do so under the provisions of
the Ground Leases and any mortgage or deed of trust superior in lien to the
Mortgages, (iii) such proceeding shall suspend the collection of the contested
Taxes from Borrowers and from the Properties, (iv) such proceeding shall be
permitted under and be conducted in accordance with the provisions of any other
instrument to which Borrowers is, or the Properties are, subject and shall not
constitute a default thereunder, (v) neither the Properties nor any part thereof
nor any interest therein will in the opinion of Co-Lenders be in danger of being
sold, forfeited, terminated, cancelled or lost, and (vi) Borrowers shall have
set aside in a manner satisfactory to Co-Lenders adequate cash reserves for the
payment of the contested Taxes, together with all interest and penalties
thereon, or in the alternative Borrowers shall have furnished such security as
may be required in the proceeding, or as may otherwise be requested or required
by Co-Lenders to insure the payment of the contested Taxes, together with all
interest and penalties thereon.

            30. Insurance Coverage. Borrowers will insure the Properties and
other Collateral against such perils and hazards, and in such amounts and with
such limits, as Co-Lenders may from time to time reasonably require, and in any
event will continuously maintain with respect to each of the Properties and the
other Collateral, without cost to Co-Lenders, the insurance described in EXHIBIT
Q of this Agreement (collectively, the "Insurance Policies"). All Insurance
Policies shall be in form, issued by companies, in amounts and with deductibles
satisfactory to Co-Lenders from time to time and shall be maintained throughout
the term of the Credit Facility without cost to Co-Lenders. An insurance company
shall not be satisfactory unless such insurance company (a) has Best's general
policyholder rating of "A-" or better and a financial rating of "Class VIII" or
better; (b) is licensed in the State in which the insured Property is located;
(c) has actively been in business for at least five (5) years; (d) if it is a
mutual company, is a nonassessable company; and (e) does not provide insurance
on any one building in excess of ten (10%) percent of its policyholders' surplus
(including capital). All Insurance Policies insuring against casualty and
business interruption and other appropriate policies shall include
non-contributing mortgagee endorsements in favor of Co-Lenders with loss payable
to Co-Lenders, as well as standard waiver of subrogation endorsements, and shall
provide that the coverage shall not be terminated or modified, nor a risk
changed without thirty (30) days' advance written notice to Co-Lenders. A
verified copy of each Insurance Policy shall be delivered to Agent. If a blanket
policy is issued, a certified copy of said policy shall be furnished, together
with an endorsement indicating that Co-Lenders, and their respective affiliates,
subsidiaries, successors and assigns are additional insureds under such policy
in the designated amount. If any portion of the insured risks are reinsured, the
reinsurance policies shall contain "cut-through" endorsements in form
satisfactory to Co-Lenders. Commencing with the calendar quarter which


                                       40
<PAGE>   45
commences on January 1, 1997, Borrowers will deliver to Co-Lenders, not later
than January 10, 1997, and thereafter not later than fifteen (15) days after the
commencement of each subsequent calendar quarter during the term of the Credit
Facility, evidence satisfactory to Co-Lenders confirming that Borrowers have
prepaid all insurance premiums for the Insurance Policies (the "Insurance
Premiums") allocable to the calendar quarter in question. Borrowers will deliver
all Insurance Policies to Agent and, in case of Insurance Policies about to
expire, Borrowers will deliver renewal or replacement policies to Agent not less
than thirty (30) days prior to the date of expiration. The foregoing
requirements of this paragraph shall apply to any separate policies of insurance
taken out by Borrowers concurrent in form or contributing in the event of loss
with the Insurance Policies. If any Insurance Policy or part thereof shall
expire or be withdrawn or become void by reason of the failure or impairment of
the capital of any company in which the insurance shall be carried, or if at any
time Co-Lenders are not in receipt of written evidence that all insurance
required hereunder is in force and effect or if for any reason whatsoever the
insurance shall be unsatisfactory to Co-Lenders, Co-Lenders shall have the
absolute and unconditional right without prior notice to Borrowers to take such
action as Co-Lenders deems necessary to protect the interest of Co-Lenders in
the Properties and other Collateral, including without limitation, the obtaining
of such insurance coverage as Co-Lenders deem appropriate, and all expenses
incurred by Co-Lenders in connection with such action or by Co-Lenders in
obtaining such insurance and keeping it in effect shall be paid by Borrowers to
Co-Lenders upon demand together with interest thereon at the Default Rate.
Co-Lenders will promptly inform Borrowers of any such action so taken by
Co-Lenders. Borrowers shall at all times comply with and shall cause the
Properties, the other Collateral and the use, occupancy, operation, maintenance,
alteration, repair and restoration thereof to comply with the terms, conditions,
stipulations and requirements of the Insurance Policies. If a Property, or any
portion thereof, is located in a Federally designated "special flood hazard
area", in addition to the other Insurance Policies required under this
paragraph, a flood insurance policy shall be delivered by Borrowers to Agent
with respect thereto. If no portion of a Property is located in a Federally
designated "special flood hazard area" such fact shall be substantiated by a
certificate in form satisfactory to Agent from a licensed surveyor, appraiser or
professional engineer or other qualified individual. Except as hereinafter
specifically provided to the contrary in this paragraph, if any Property shall
be damaged or destroyed, in whole or in part, by fire or other property hazard
or casualty, Borrowers shall give prompt notice thereof to Co-Lenders and one
hundred (100%) percent of the net amount of all insurance proceeds received by
Co-Lenders or Borrowers as a result of such damage or destruction after
deduction of reasonable costs and expenses, if any, in collecting the same,
shall be applied in reduction of outstanding Principal Balance under the Credit
Facility. If a particular Property (a "Damaged Property") shall be damaged or
destroyed, in whole or in part, by fire or other casualty, Co-Lenders shall, in
accordance with the provisions of this paragraph hereinafter set forth, make the
net amount of all insurance proceeds received by Co-Lenders pursuant to the
provisions of this Agreement as a result of such damage or destruction after
deduction of their reasonable costs and expenses, if any, in collecting the same
(hereinafter referred to as the "Net Proceeds") available for the repair and
restoration of the Damaged Property, provided that (i) no default shall have
occurred and shall be continuing under the Credit Facility Documents, (ii)
Borrowers shall commence the repair and restoration of the Damaged Property, as
nearly as possible to the condition the Damaged Property were in immediately
prior to such fire or other casualty, with such alterations as may be approved
by Co-Lenders, as soon as reasonably practicable, and provided that Co-Lenders
have confirmed to Borrowers that the Net Proceeds will be made available
pursuant to the following provisions of this paragraph to cover the cost of such
repair and restoration, and shall diligently pursue the same to satisfactory
completion, (iii) Co-Lenders shall be satisfied that any operating deficits
which will be incurred with respect


                                       41
<PAGE>   46
to the Damaged Property as a result of the occurrence of any such fire or other
casualty will be covered out of the Net Proceeds or by Borrowers out-of-pocket
or with the proceeds, if any, of business interruption or rental interruption
insurance, (iv) Co-Lenders shall be satisfied that, upon the completion of such
repair and restoration of the Damaged Property, the gross cash flow and the net
cash flow of the Damaged Property will be restored to a level sufficient to
cover all carrying costs and operating expenses of the Damaged Property, (v)
Co-Lenders shall be satisfied that the repair and restoration of the Damaged
Property will be completed on or before the earlier to occur of (w) ninety (90)
days prior to the Maturity Date, or (x) the earliest date required for such
completion under the terms of the Ground Lease, if any, pertaining to the
Damaged Property or under the terms of any Leases which will or are required in
accordance with the provisions of this paragraph hereinafter set forth to remain
in effect subsequent to the occurrence of such fire or other casualty and the
completion of the repair and restoration of the Damaged Property, (vi)
Co-Lenders shall be satisfied that all of the terms, covenants and provisions of
this Agreement and the other Credit Facility Documents will continue to be
complied with during and subsequent to the completion of such repair and
restoration (including, without limitation, the financial covenants set forth in
paragraph 13 and paragraph 23 of this Agreement, and (vii) Borrowers and the
Guarantors shall execute and deliver to Co-Lenders a completion guaranty in form
and substance satisfactory to Co-Lenders pursuant to the provisions of which
Borrowers and Guarantors shall jointly and severally guaranty to Co-Lenders the
lien-free completion by Borrowers of the repair and restoration of the Damaged
Property in accordance with the provisions of this paragraph. Notwithstanding
anything to the contrary contained in this paragraph, Co-Lenders shall not be
obligated to make Net Proceeds available for the repair and restoration of the
Damaged Property in accordance with the provisions of this paragraph if more
than 30% of the Property in question has been damaged or destroyed by such fire
or other casualty (as measured by the cost of completing the repair and
restoration of the damaged portions of the Property in question verses the cost
of total replacement of the Property in question) or if Leases demising in the
aggregate more than 30% of the total office space in the Damaged Property which
has been demised under executed and delivered Leases in effect as of the date of
the occurrence of such fire or other casualty are terminated as a result of such
fire or other casualty, or will not remain in full force and effect during and
after the completion of the repair and restoration of the Damaged Property. The
Net Proceeds, shall be held by Co-Lenders in an interest bearing account, and
until disbursed in accordance with the provisions of this paragraph, shall
constitute additional security for the payment of the Debt. The Net Proceeds
together with interest earned thereon, shall be disbursed by Co-Lenders to, or
as directed by, Borrowers from time to time during the course of the repair and
restoration of the Damaged Property, upon receipt of evidence satisfactory to
Co-Lenders (which evidence shall in each instance and to the full extent
required by Co-Lenders include receipted bills, invoices, lien waivers and a
continuation and date down of title to the Damaged Property in form satisfactory
to Co-Lenders and issued by the title company insuring the lien of this Mortgage
or another title company satisfactory to Co-Lenders) that (i) all materials
installed and work and labor performed (except to the extent that they are to be
paid for out of the requested disbursement) in connection with the repair and
restoration of the Damaged Property have been paid for in full, and (ii) there
exist no notice of pendency, stop order, notice of intention to file mechanic's
or materialman's lien, mechanic's or materialman's lien or other lien or
encumbrance of any nature whatsoever on the Damaged Property arising out of the
repair and restoration of the Damaged Property which have not either been fully
bonded to the satisfaction of Co-Lenders and discharged of record or in the
alternative fully insured over to the satisfaction of Co-Lenders by the title
company insuring the lien of the Mortgage covering the Damaged Property. The
repair and restoration of the Damaged Property shall be done and completed by
Borrowers in an expeditious and diligent fashion and in compliance with all


                                       42
<PAGE>   47
applicable governmental laws, rules and regulations (including, without
limitation, all applicable Environmental Requirements), and all plans and
specifications required in connection with the repair and restoration of the
Damaged Property shall be subject to review and acceptance in all respects by
Co-Lenders and by an independent consulting engineer selected by Co-Lenders
(hereinafter referred to in this paragraph as the "Consultant"). Upon the
occurrence of an Event of Default, Co-Lenders shall have the use of such plan
and specifications and all permits, licenses and approvals required or obtained
in connection with the repair and restoration of the Damaged Property. The
identity of the contractors, subcontractors and materialmen engaged in the
repair and restoration of the Damaged Property, as well as the contracts under
which they have been engaged, shall be subject to approval, review and
acceptance by Co-Lenders and Consultant. All costs and expenses incurred by
Co-Lenders in connection with making the Net Proceeds available for the repair
and restoration of the Damaged Property including, without limitation,
reasonable counsel fees and the Consultant's fees, shall be paid by Borrowers.
In no event shall Co-Lenders be obligated to make disbursements of the Net
Proceeds in excess of an amount equal to the costs actually incurred from time
to time for work in place as part of the repair and restoration of the Damaged
Property, as certified by the Consultant, minus the Casualty Retainage. The term
"Casualty Retainage" as used in this paragraph shall mean an amount equal to 10%
of the costs actually incurred for work in place as part of the repair and
restoration of the Damaged Property, as certified by the Consultant. The
Casualty Retainage shall in no event, and notwithstanding anything to the
contrary hereinabove set forth in this paragraph, be less than the amount
actually held back by Borrowers from contractors, subcontractors and materialmen
engaged in the making of the repair and restoration of the Damaged Property.
Co-Lenders shall not be obligated to make disbursements of the Net Proceeds more
frequently than once every fifteen (15) days. The Casualty Retainage shall not
be released until the Consultant certifies to Co-Lenders that the repair and
restoration of the Damaged Property have been completed in accordance with the
provisions of this paragraph, and Co-Lenders receives evidence satisfactory to
Co-Lenders that the costs of the repair and restoration of the Damaged Property
have been paid in full or will be paid in full out of the Casualty Retainage,
provided, however, that Co-Lenders will release the portion of the Casualty
Retainage being held with respect to any contractor, subcontractor or
materialman engaged in the repair and restoration of the Damaged Property as of
the date upon which the Consultant certifies to Co-Lenders that such contractor,
subcontractor or materialman has satisfactorily completed all work and has
supplied all materials in accordance with the provisions of such contractor's,
subcontractor's or materialman's contract, and such contractor, subcontractor or
materialman delivers such lien waivers and evidence of payment in full of all
sums due to such contractor, subcontractor or materialman as may be reasonably
requested by Co-Lenders or by the title company insuring the lien of the
Mortgage covering the Damaged Property. If required by Co-Lenders, the release
of any such portion of the Casualty Retainage shall be approved by the surety
company, if any, which has issued a payment or performance bond with respect to
such contractor, subcontractor or materialman. Notwithstanding anything to the
contrary contained in this paragraph, if the Net Proceeds shall be less than
$250,000 and if the costs of completing the repair and restoration of the
Damaged Property shall be less than $250,000, the Net Proceeds will be disbursed
by Co-Lenders to Borrowers upon receipt, provided that no default shall have
occurred and shall be continuing under the Credit Facility Documents, and
Borrowers delivers to Co-Lenders a written undertaking to expeditiously commence
and to satisfactorily complete with due diligence the repair and restoration of
the Damaged Property. If at any time the Net Proceeds or the undisbursed balance
thereof shall not, in the opinion of Co-Lenders, be sufficient to pay in full
the balance of the costs which will be incurred in connection with the
completion of the repair and restoration of the Damaged Property, Borrowers
shall deposit the deficiency (hereinafter referred to as the "Net Proceeds
Deficiency") with Co-Lenders before any


                                       43
<PAGE>   48
further disbursement of the Net Proceeds shall be made, which Net Proceeds
Deficiency deposit shall be held by Co-Lenders in an interest bearing account,
shall be disbursed together with interest earned thereon, for costs actually
incurred in connection with the repair and restoration of the Damaged Property
on the same conditions applicable to the disbursement of the Net Proceeds, and
until so disbursed pursuant to this paragraph shall constitute additional
security for the payment of the Debt. Upon the occurrence of an Event of
Default, Co-Lenders shall have the right to apply the undisbursed balance of any
Net Proceeds Deficiency deposit, together with interest thereon, to the payment
of the Debt whether or not then due and payable in such order, priority and
proportions as Co-Lenders shall deem to be appropriate in its discretion. The
excess, if any, of the Net Proceeds and the remaining balance, if any, of the
Net Proceeds Deficiency deposit, together with interest thereon, after the
Consultant certifies to Co-Lenders that the repair and restoration of the
Damaged Property have been completed in accordance with the provisions of this
paragraph, and the receipt by Co-Lenders of evidence satisfactory to Co-Lenders
that all costs incurred in connection with the repair and restoration have been
paid in full, shall be applied to the reduction of the outstanding Principal
Balance of the Credit Facility. All costs of the repair and restoration of the
Damaged Property in excess of the Net Proceeds shall be paid for by Borrowers.
All insurance proceeds received by Co-Lenders and not required to be disbursed
for the repair and restoration of the Damaged Property pursuant to the
provisions of this paragraph hereinabove set forth may be retained and applied
by Co-Lenders toward the payment of the Debt whether or not then due and payable
in such order, priority and proportions as Co-Lenders in their discretion shall
deem proper or, at the discretion of Co-Lenders, the same may be paid, either in
whole or in part, to Borrowers for such purposes as Co-Lenders shall designate,
in their discretion. If Co-Lenders shall receive and retain insurance proceeds,
the lien of the Mortgages shall be reduced only by the amount thereof received
and retained by Co-Lenders and actually applied by Co-Lenders in reduction of
the Debt.

            31. Condemnation. Notwithstanding any taking by any public or
quasi-public authority through eminent domain or otherwise, Borrowers shall
continue to pay the Debt at the time and in the manner provided for its payment
in the Credit Facility Notes, this Agreement and the Mortgages and the Debt
shall not be reduced until any award or payment therefor shall have been
actually received and applied by Agent to the discharge of the Debt. Except as
hereinafter specifically provided to the contrary in this paragraph, if all or
any portion of a Property is taken by any public or quasi-public authority
through eminent domain or otherwise, one hundred (100%) percent of the aggregate
award or payment received by Co-Lenders or Borrowers as a result of such taking
after deduction of reasonable costs and expenses, if any, in collecting the same
shall be applied in reduction of outstanding Principal Balance under the Credit
Facility. If any Property is sold, through foreclosure or otherwise, prior to
the receipt by Co-Lenders of such award or payment, Co-Lenders shall have the
right, whether or not a deficiency judgment on the Credit Facility Notes shall
have been sought, recovered or denied, to receive such award or payment, or a
portion thereof sufficient to pay the Debt, whichever is less. Borrowers shall
file and prosecute its claim or claims for any such award or payment in good
faith and with due diligence and cause the same to be collected and paid over to
Co-Lenders. Borrowers hereby irrevocably authorize and empower Co-Lenders, in
the name of Borrowers or otherwise, to collect and receipt for any such award or
payment and, subsequent to the occurrence of a default beyond the expiration of
applicable notice and cure periods, if any under any of the Credit Facility
Documents and during the continuance thereof, to file and prosecute such claim
or claims. Although it is hereby expressly agreed that the same shall not be
necessary in any event, Borrowers shall, upon demand of Co-Lenders, make,
execute and deliver any and all assignments and other instruments sufficient for
the purpose of assigning any such award or payment to Co-Lenders, free and clear


                                       44
<PAGE>   49
of any encumbrances of any kind or nature whatsoever. Notwithstanding anything
to the contrary contained in this paragraph, if a non-material part of a
particular Property is taken through eminent domain or otherwise and if such
taking does not otherwise involve a physical taking of the buildings
constituting part of such Property, or any portion thereof, any award given as a
result of such taking may be retained by Borrowers, provided (i) such award is
not in excess of $100,000, (ii) no default shall have occurred and shall be
continuing under the Credit Facility Documents, (iii) Borrowers promptly
commence any necessary repair or restoration to such Property, (iv) Co-Lenders
are satisfied that neither the value, use nor operation of such Property will be
adversely affected in any material way as a result of such taking, and (v)
Co-Lenders are satisfied that all necessary repairs and restorations to such
Property will be diligently and satisfactorily completed by Borrowers within a
reasonable period of time taking into account the nature of the taking.

            32. Environmental Provisions. For the purposes of this paragraph the
following terms shall have the following meanings: (i) the term "Hazardous
Material" shall mean any material or substance that, whether by its nature or
use, is now or hereafter defined as a hazardous waste, hazardous substance,
pollutant or contaminant under any Environmental Requirement, or which is toxic,
explosive, corrosive, flammable, infectious, radioactive, carcinogenic,
mutagenic or otherwise hazardous and which is now or hereafter regulated under
any Environmental Requirement, or which is or contains petroleum, gasoline,
diesel fuel or another petroleum hydrocarbon product, (ii) the term
"Environmental Requirements" shall collectively mean all present and future
laws, statutes, ordinances, rules, regulations, orders, codes, licenses,
permits, decrees, judgments, directives or the equivalent of or by any
Governmental Authority and relating to or addressing the protection of the
environment or human health, and (iii) the term "Governmental Authority" shall
mean the Federal government, or any state or other political subdivision
thereof, or any agency, court or body of the Federal government, any state or
other political subdivision thereof, exercising executive, legislative,
judicial, regulatory or administrative functions. Borrowers hereby represents
and warrants to Co-Lenders that to the best of Borrowers's knowledge (i) no
Hazardous Material is currently located at, on, in, under or about any Property,
except as specifically set forth in the Environmental Reports, (ii) no Hazardous
Material is currently located at, in, on, under or about any Property in a
manner which violates any Environmental Requirement, or which requires cleanup
or corrective action of any kind under any Environmental Requirement, (iii) no
releasing, emitting, discharging, leaching, dumping or disposing of any
Hazardous Material from any Property onto or into any other property or from any
other property onto or into any Property has occurred or is occurring in
violation of any Environmental Requirement, (iv) no notice of violation, lien,
complaint, suit, order or other notice with respect to any Property is presently
outstanding under any Environmental Requirement, and (v) each Property and the
operation thereof are in compliance with all Environmental Requirements.
Borrowers shall comply, and shall cause all tenants or other occupants of the
Properties to comply, in all respects with all Environmental Requirements, and
will not generate, store, handle, process, dispose of or otherwise use, and will
not permit any tenant or other occupant of any Property to generate, store,
handle, process, dispose of or otherwise use, Hazardous Materials at, in, on,
under or about any Property in a manner that could lead or potentially lead to
the imposition on Borrowers, any Co-Lender or any Property of any liability or
lien of any nature whatsoever under any Environmental Requirement. Borrowers
shall notify Co-Lenders promptly in the event of any spill or other release of
any Hazardous Material at, in, on, under or about any Property which is required
to be reported to a Governmental Authority under any Environmental Requirement,
will promptly forward Agent copies of any notices received by Borrowers relating
to alleged violations of any Environmental Requirement and will promptly pay
when due any fine or assessment against any Co-Lender, any Borrowers or any
Property


                                       45
<PAGE>   50
relating to any Environmental Requirement. If at any time it is determined that
the operation or use of any Property violates any applicable Environmental
Requirement or that there are Hazardous Materials located at, in, on, under or
about any Property which, under any Environmental Requirement, require special
handling in collection, storage, treatment or disposal, or any other form of
cleanup or corrective action, Borrowers shall, within thirty (30) days after
receipt of notice thereof from any Governmental Authority or from Agent, take,
at its sole cost and expense, such actions as may be necessary to fully comply
in all respects with all Environmental Requirements, provided, however, that if
such compliance cannot reasonably be completed within such thirty (30) day
period, Borrowers shall commence such necessary action within such thirty (30)
day period and shall thereafter diligently and expeditiously proceed to fully
comply in all respects and in a timely fashion with all Environmental
Requirements. If Borrowers fails to timely take, or to diligently and
expeditiously proceed to complete in a timely fashion, any such action,
Co-Lenders may, in their sole and absolute discretion, make advances or payments
towards the performance or satisfaction of the same, but shall in no event be
under any obligation to do so. All sums so advanced or paid by Co-Lenders
(including, without limitation, consultant fees and expenses, investigation and
laboratory fees and expenses, and fines or other penalty payments and reasonable
legal fees) and all sums advanced or paid in connection with any judicial or
administrative investigation or proceeding relating thereto, will immediately,
upon demand, become due and payable from Borrowers and shall bear interest at
the Default Rate from the date any such sums are so advanced or paid by
Co-Lenders until the date any such sums are repaid by Borrowers to Co-Lenders.
Borrowers will execute and deliver, promptly upon request, such instruments as
Co-Lenders may deem useful or necessary to permit Co-Lenders to take any such
action, and such additional notes, as Co-Lenders may require to secure all sums
so advanced or paid by Co-Lenders. If a lien is filed against any Property by
any Governmental Authority resulting from the need to expend or the actual
expending of monies arising from an action or omission, whether intentional or
unintentional, of Borrowers or for which Borrowers is responsible, resulting in
the releasing, spilling, leaking, leaching, pumping, emitting, pouring, emptying
or dumping of any Hazardous Material into the waters or onto land located within
or without the State in which any Property is located, then Borrowers will,
within thirty (30) days from the date that Borrowers are first given notice that
such lien has been placed against such Property (or within such shorter period
of time as may be specified by Co-Lenders if such Governmental Authority has
commenced steps to cause such Property to be sold pursuant to such lien) either
(a) pay the claim and remove the lien, or (b) furnish a cash deposit, bond, or
such other security with respect thereto as is satisfactory in all respects to
Co-Lenders and is sufficient to effect a complete discharge of such lien on such
Property. Notwithstanding the foregoing, after prior notice to Agent, in the
case of any material item, Borrowers, at its own expense, may contest by
appropriate legal proceedings, promptly initiated and conducted in good faith
and with due diligence, the validity or enforceability, in whole or in part, of
any Environmental Requirement, provided that (i) no default shall have occurred
and be continuing under the Credit Facility Notes, the Mortgages, this Agreement
or any of the other Credit Facility Documents, (ii) Borrowers is permitted to do
so under the provisions of the Ground Leases, (iii) such proceeding shall
suspend the obligation of Borrowers to comply with any such Environmental
Requirement, (iv) such proceeding shall be permitted under and be conducted in
accordance with the provisions of any other instrument to which Borrowers is, or
the Properties are, subject and shall not constitute a default thereunder, (v)
failure to immediately comply with any such law, order, ordinance, rule or
regulation will not invalidate or vitiate any Insurance Policies, in whole or in
part, and will not in the opinion of Co-Lenders constitute a present danger to
the Properties or any portion thereof, or to the individuals using and entering
upon the Properties, (vi) neither the Properties nor any part thereof nor any
interest therein will in the opinion of Co-Lenders be in danger of


                                       46
<PAGE>   51
being sold, forfeited, confiscated, terminated, cancelled or lost, (vii)
Borrowers shall have furnished such security as may be required in the
proceeding, or as may otherwise be requested or required by Co-Lenders to insure
the payment by Borrowers of all costs of compliance, fines and penalties,
together with interest thereon, as may be incurred by Borrowers in the event of
a determination in such proceeding adverse to Borrowers, and (viii) neither
Borrowers, Agent nor any Co-Lender will in the opinion of Agent and Co-Lenders
be subject to any criminal or civil liability as the result of such contestment
by Borrowers. Co-Lenders may, at their option, at intervals of not less than one
year, or more frequently if Co-Lenders reasonably believe that a Hazardous
Material or other environmental condition violates or threatens to violate any
Environmental Requirement applicable to a Property, cause an environmental audit
of such Property to be conducted to confirm Borrowers's compliance with the
provisions of this paragraph in respect of such Property, and Borrowers shall
cooperate in all reasonable ways with Agent in connection with any such audit.
If such audit discloses that a violation of an Environmental Requirement exists,
Borrowers shall pay all costs and expenses incurred in connection with such
audit, otherwise, the costs and expenses of such audit shall, notwithstanding
anything to the contrary set forth in this paragraph, be paid by Co-Lenders. If
any of the Mortgages is foreclosed, or if any Property is sold pursuant to the
provisions of the Mortgages, or if Borrowers tenders a deed or assignment in
lieu of foreclosure or sale, Borrowers shall deliver such Properties to the
purchaser at foreclosure or sale or to Co-Lenders, their respective nominees, or
wholly owned subsidiaries, as the case may be, in a condition that complies in
all respects with all Environmental Requirements. Borrowers will defend,
indemnify, and hold harmless Agent, Co-Lenders, their respective employees,
agents, officers, and directors, from and against any and all claims, demands,
penalties, causes of action, fines, liabilities, settlements, damages, costs, or
expenses of whatever kind or nature, known or unknown, foreseen or unforeseen,
contingent or otherwise (including, without limitation, consultant fees and
expenses, investigation and laboratory fees and expenses, court costs,
litigation expenses and reasonable attorneys fees) arising out of, or in any way
related to, (i) any breach by Borrowers of any of the provisions of this
paragraph, (ii) the presence, disposal, spillage, discharge, emission, leakage,
release, or threatened release of any Hazardous Material which is at, in, on,
under, about, from or affecting any Property, including, without limitation, any
damage or injury resulting from any such Hazardous Material to or affecting any
Property or the soil, water, air, vegetation, buildings, personal property,
individuals or animals located on any Property or on any other property or
otherwise, (iii) any personal injury (including wrongful death) or property
damage (real or personal) arising out of or related to any such Hazardous
Material, (iv) any lawsuit brought or threatened, settlement reached, or order
or directive of or by any Governmental Authority relating to such Hazardous
Material, or (v) any violation of any Environmental Requirement. The aforesaid
indemnification shall in all events and under all circumstances constitute the
personal recourse undertakings, obligations and liabilities of Borrowers. The
indemnification by Borrowers in favor of Agent and Co-Lenders hereinabove set
forth in this paragraph shall not be applicable to any claim, demand, penalty,
cause of action, fine, liability, settlement, damage, cost or other expense of
any type whatsoever pertaining to a particular Property (i) occasioned, arising
and caused solely and directly as the result of the negligence or willful
misconduct of Agent, any Co-Lender, any nominee or any wholly owned subsidiary
of Agent or a Co-Lender or their respective employees or agents and irrespective
of whether occurring prior or subsequent to the date upon which any Co-Lender or
any nominee or any wholly owned subsidiary of any Co-Lender acquires possession
of such Property by foreclosure of the Mortgages, a sale of such Property
pursuant to the provisions of the Mortgages, acceptance of a deed or assignment
in lieu of foreclosure or sale or otherwise, or (ii) occasioned, arising and
caused solely and directly as the result of any act of any Person (other than
(A) an act of Borrowers, its employees or agents or Persons under the control of


                                       47
<PAGE>   52
Borrowers, or (B) an act of Agent, any Co-Lender, any nominee or any wholly
owned subsidiary of any Co-Lender or their respective employees or agents which
does not constitute negligence or willful misconduct, or (C) an act of any
Governmental Authority, including, without limitation, any change in any
Environmental Requirement) and occurring subsequent to the earlier to occur of
(x) the date of payment to Co-Lenders in cash of the entire Debt, and (y) the
date upon which any Co-Lender, any nominee or any wholly owned subsidiary of any
Co-Lender acquires possession of such Property by foreclosure of the Mortgages,
a sale of such Property pursuant to the provisions of the Mortgages, acceptance
of a deed or assignment in lieu of foreclosure or sale or otherwise. Except as
hereinabove specifically provided to the contrary in this paragraph, the
obligations and liabilities of Borrowers under this paragraph shall survive and
continue in full force and effect and shall not be terminated, discharged or
released, in whole or in part, irrespective of whether the Debt has been paid in
full and irrespective of any foreclosure of any of the Mortgages, sale of any
one or more of the Properties pursuant to the provisions of the Mortgages or
acceptance by Co-Lenders, their nominees or wholly owned subsidiaries of one or
more deeds or assignments in lieu of foreclosure or sale and irrespective of any
other fact or circumstance of any nature whatsoever.

            33. Estoppel Certificates. Borrowers, within ten (10) days after
request by Co-Lenders and at its expense, will furnish Co-Lenders with a
statement, duly certified, setting forth the amount of the Debt and the offsets
or defenses thereto, if any. Co-Lenders, within ten (10) days after request by
Borrowers and at Borrowers's expense, and provided that no Event of Default has
occurred and is continuing under the Credit Facility Documents, will furnish
Borrowers with a statement setting forth the then outstanding principal balance
of the Credit Facility Notes and the interest, if any, accrued and unpaid
thereon.

            34. Non-Waiver. The failure of Co-Lenders or Agent to insist upon
strict performance of any term of this Agreement shall not be deemed to be a
waiver of any term of this Agreement. Borrowers shall not be relieved of
Borrowers's obligation to pay the Debt at the time and in the manner provided
for its payment in the Credit Facility Notes, the Mortgages and this Agreement
by reason of (i) failure of Co-Lenders to comply with any request of Borrowers
to take any action to foreclose any one or more of the Mortgages or otherwise
enforce any of the provisions of this Agreement, the Mortgages, the Credit
Facility Notes or any of the other Credit Facility Documents, and (ii) the
release, regardless of consideration, of the whole or any part of the Properties
or any other Collateral or security for the Debt. Regardless of consideration,
and without the necessity for any notice to or consent by the holder of any
subordinate lien, encumbrance, right, title or interest in or to the Properties,
Co-Lenders may release any Person at any time liable for the payment of the Debt
or any portion thereof or any part of the security held for the Debt and may
extend the time of payment or otherwise modify the terms of the Credit Facility
Notes, the Mortgages, this Agreement or any of the other Credit Facility
Documents, including, without limitation, a modification of the interest rate
payable on the principal balance of the Credit Facility Notes, without in any
manner impairing or affecting the Mortgages or the respective liens thereof or
the priority of the Mortgages, as so extended and modified, as security for the
Debt over any such subordinate lien, encumbrance, right, title or interest.
Co-Lenders may resort for the payment of the Debt to any other security held by
Co-Lenders in such order and manner as Co-Lenders in their discretion, may
elect. Co-Lenders may take action to recover the Debt, or any portion thereof,
or to enforce any covenant hereof without prejudice to the right of Co-Lenders
thereafter to foreclose any one or more of the Mortgages. Co-Lenders shall not
be limited exclusively to the rights and remedies herein stated but shall be
entitled to every additional right and remedy set forth in the Credit Facility
Documents or now or hereafter afforded by law. The rights of Co-Lenders under
this Agreement and


                                       48
<PAGE>   53
the other Credit Facility Documents shall be separate, distinct and cumulative
and none shall be given effect to the exclusion of the others. No act of
Co-Lenders shall be construed as an election to proceed under any one provision
of this Agreement or of the other Credit Facility Documents to the exclusion of
any other provision set forth in this Agreement or the other Credit Facility
Documents.

            35. Sole Discretion. Except as may otherwise be expressly provided
to the contrary, wherever pursuant to the Credit Facility Notes, the Mortgages,
this Agreement, or any of the other Credit Facility Documents, Agent or any
Co-Lender exercises any right given to it to consent or not consent, or to
approve or disapprove, or any arrangement or term is to be satisfactory to Agent
or such Co-Lender the decision of Agent or such Co-Lender, as the case may be,
shall be in the sole and absolute discretion of Agent or such Co-Lender, as the
case may be, and shall be final and conclusive.

            36. Absolute and Unconditional Obligation. Borrowers acknowledges
that Borrowers' obligation to pay the Debt in accordance with the provisions of
the Credit Facility Notes, the Mortgages and this Agreement is and shall at all
times continue to be absolute and unconditional in all respects, and shall at
all times be valid and enforceable irrespective of any other agreements or
circumstances of any nature whatsoever which might otherwise constitute a
defense to the Credit Facility Notes, the Mortgages or this Agreement or the
obligation of Borrowers thereunder to pay the Debt or the obligations of any
other Person relating to the Credit Facility Notes, the Mortgages or this
Agreement or the obligations of Borrowers under the Credit Facility Notes, the
Mortgages or this Agreement or otherwise with respect to the Credit Facility,
and Borrowers absolutely, unconditionally and irrevocably waives any and all
right to assert any defense, setoff, counterclaim or crossclaim of any nature
whatsoever with respect to the obligation of Borrowers to pay the Debt in
accordance with the provisions of the Credit Facility Notes, the Mortgages and
this Agreement or the obligations of any other Person relating to the Credit
Facility Notes, the Mortgages or this Agreement or obligations of Borrowers
under the Facility Notes, the Mortgages or this Agreement or otherwise with
respect to the Credit Facility in any action, case or proceeding brought by
Agent or Co-Lenders to collect the Debt, or any portion thereof, or to enforce,
foreclose and realize upon the lien and security interest created by the
Mortgages or any other document or instrument securing repayment of the Debt, in
whole or in part (provided, however, that the foregoing provisions of this
sentence shall not be deemed a waiver of the right of Borrowers to assert any
compulsory counterclaim in any such action, case or proceeding brought by Agent
or Co-Lenders in any state court if such counterclaim is compelled under local
law or rule or procedure, or in any such action, case or proceeding brought by
Agent or Co-Lenders in a court of the United States, nor shall the foregoing
provisions of this sentence be deemed a waiver of the right of Borrowers to
assert any claim which would otherwise constitute a defense, setoff,
counterclaim or crossclaim of any nature whatsoever against Agent or Co-Lenders
in any separate action, case or proceeding brought by Borrowers against Agent or
Co-Lenders).

            37. Relationship. The relationship of Co-Lenders to Borrowers
hereunder is strictly and solely that of lender and borrower and nothing
contained in the Credit Facility Notes, the Mortgages, this Agreement or any of
the other Credit Facility Documents is intended to create, or shall in any event
or under any circumstance be construed as creating, a partnership, joint
venture, tenancy-in-common, joint tenancy or other relationship of any nature
whatsoever between Co-Lenders and Borrowers other than as lender and borrower.

            38. Anti-Forfeiture. Borrowers hereby covenant and agree not to
commit, permit or suffer to exist any act or omission affording the Federal
government or any state or local government the right of forfeiture under any


                                       49
<PAGE>   54
Federal or state RICO or similar law as against the Properties or any part
thereof or interest therein or any monies paid in performance of Borrowers'
obligations under this Agreement, the Mortgages, the Credit Facility Notes or
any of the other Credit Facility Documents. In furtherance thereof, Borrowers
hereby indemnify Agent and Co-Lenders and agree to defend and hold Agent and
Co-Lenders harmless from and against any loss, damage or injury by reason of the
breach of the covenants and agreements set forth in this paragraph, which
indemnity shall constitute the personal recourse obligation of Borrowers.
Without limiting the generality of the foregoing, the filing of formal charges
or the commencement of proceedings against Borrowers or against the Properties
or any part thereof or interest therein under any Federal or state law for which
forfeiture of the Properties or any part thereof or of any monies paid in
performance of Borrowers' obligations under the Credit Facility Documents is a
potential result, shall, at the election of Co-Lenders, but otherwise subject to
the immediately following sentence, constitute an Event of Default hereunder
without notice or opportunity to cure. Notwithstanding the foregoing, after
prior notice to Co-Lenders, Borrowers, at their own cost and expense, may
contest the validity of or application of any such law affording such
forfeiture, provided that (i) no default shall have occurred and shall be
continuing under the Credit Facility Notes, the Mortgages, this Agreement or any
of the other Credit Facility Documents, (ii) Borrowers are permitted to do so
under the provisions of the Ground Leases, (iii) such proceeding shall be
permitted under and be conducted in accordance with the provisions of any other
instrument to which Borrowers are or the Properties are subject and shall not
constitute a default thereunder, (iv) neither the Properties nor any portion
thereof nor any interest therein will in the opinion of Co-Lenders be in danger
of being sold, forfeited, terminated, cancelled or lost, and (iii) Borrowers
shall have deposited with Agent cash or other cash equivalent or letter of
credit satisfactory to Co-Lenders in an amount sufficient to discharge any lien
together with interest and penalties thereon arising out of such law.
Notwithstanding the foregoing, Borrowers shall not be required to make any
deposit with Agent pursuant to clause (iii) of the preceding sentence, if
Co-Lenders are reasonably satisfied that (a) the act or omission affording such
forfeiture was committed by a Person other than Borrowers or an Affiliate or
subsidiary of Borrowers, (b) Borrowers are diligently pursuing their rights and
remedies against such Person, (c) neither the Properties nor any portion thereof
or interest therein will be in danger of being sold, forfeited, terminated,
cancelled or lost, and (d) the respective liens and priorities of the Mortgages
will not be in danger of being primed, diminished or forfeited.

            39. Deposits. Whenever in this Agreement, Borrowers are required to
deposit monies with Agent or Co-Lenders to secure obligations of Borrowers under
this Agreement or as a condition precedent to Borrowers' right to contest
certain obligations, such monies shall (unless otherwise specifically provided
to the contrary in this Agreement) be held in an interest bearing account
selected by Agent or Co-Lenders, as the case may be. All such accrued interest
shall be held, disbursed and applied in accordance with the provisions
applicable to such deposits. In order to secure the payment of the Debt and the
performance by Borrowers of its obligations under the Credit Facility Documents,
Borrowers hereby grant and assign to Agent and Co-Lenders a security interest in
and to all monies from time to time on deposit in any such account. Upon the
occurrence of an Event of Default and for so long as such Event of Default shall
continue, Co-Lenders shall have the absolute right to apply all or any portion
of the balances held in any such accounts to the payment of the Debt whether or
not due and payable in such order, priority and proportions as Co-Lenders in
their discretion shall deem appropriate.

            40. Submission to Jurisdiction. Borrowers agrees to submit to
personal jurisdiction in the State of New York in any action, case or proceeding
arising out of the Credit Facility Notes, this Agreement or the other Credit
Facility Documents (other than the Mortgages and the Assignments


                                       50
<PAGE>   55
of Leases and Rents), and, in furtherance of such agreement, Borrowers hereby
agree and consent that without limiting other methods of obtaining jurisdiction,
personal jurisdiction over Borrowers in any such action, case or proceeding may
be obtained within or without the jurisdiction of any court located in the State
of New York and that any process or notice of motion or other application to any
such court in connection with any such action, case or proceeding may be served
upon Borrowers by registered or certified mail to or by personal service at the
last known address of Borrowers, as the case may be, whether such address be
within or without the jurisdiction of any such court. Borrowers also agree that
the venue of any litigation arising in connection with the Debt or in respect of
any of the obligations of Borrowers under the Credit Facility Notes, this
Agreement or the other Credit Facility Document (other than the Mortgages and
the Assignments of Leases and Rents) shall, to the extent permitted by law, be
in New York County, New York.

            41. Retention of Counsel and Consultants. If, subsequent to the
occurrence of a default under any of the Credit Facility Documents or otherwise
in connection with the protection, preservation, addition or release of
Collateral, Agent or Co-Lenders deem it to be in the best interest of Co-Lenders
to retain the assistance of any Person (including, but not limited to,
attorneys, title insurance companies, third party escrow agents, appraisers,
accountants engineers and surveyors) with respect to any request for consent or
approval by Agent or Co-Lenders under the Credit Facility Documents, Borrowers
shall reimburse Co-Lenders within ten (10) days of demand by Agent for all
reasonable costs incurred by Co-Lenders in connection with the employment of
such Persons.

            42. Waiver of Notice. Borrowers shall not be entitled to any notices
of any nature whatsoever from Agent or any Co-Lender except with respect to
matters for which this Agreement specifically and expressly provides for the
giving of notice by Agent or a Co-Lender to Borrowers, and Borrowers hereby
expressly waive (to the full extent Borrowers may lawfully do so) the right to
receive any notice from Agent or any Co-Lender with respect to any matter for
which this Agreement does not specifically and expressly provide for the giving
of notice by Agent or a Co-Lender to Borrowers.

            43. Events of Default. The Debt shall become due at the option of
Co-Lenders upon the occurrence of any one or more of the following events
(collectively, "Events of Default"):

                        (a) if any portion of the Debt is not paid when due;

                        (b) if any of the covenants contained in paragraph 18 of
            this Agreement shall be breached;

                        (c) if any fact, circumstance or event shall occur which
            is specifically characterized under any provision of any Credit
            Facility Document as an "Event of Default" within the meaning given
            to such term pursuant to the provisions of this Agreement;

                        (d) if any representation or warranty of any Borrower or
            any Guarantor made in this Agreement or any of the other Credit
            Facility Documents, or in any certificate, report, financial
            statement or other instrument furnished in connection with the
            making of the Credit Facility Notes, the Mortgages, this Agreement
            or any other Credit Facility Document or the extension of the Credit
            Facility by Co-Lenders to Borrowers, shall prove false or misleading
            in any material respect;

                        (e) if any Federal tax lien is filed against Borrowers,
            or any Property and the same is not discharged of


                                       51
<PAGE>   56
            record within thirty (30) days after the same is filed (unless the
            same is being contested in good faith by appropriate proceeding and
            otherwise in compliance with the general requirements for contesting
            Taxes, as more specifically set forth in paragraph 29 of this
            Agreement);

                        (f) if without the consent of Co-Lenders any FF&E
            (except for normal replacement of the FF&E) is removed, or if
            without the consent of Co-Lenders any Property is demolished or
            materially altered (other than for tenant improvements being made
            under Leases entered into in conformity with the provisions of this
            Agreement);

                        (g) if the Insurance Policies are not kept in full force
            and effect, or if the Insurance Policies are not delivered to Agent
            upon request;

                        (h) if without the consent of Co-Lenders any Lease is
            made, cancelled or modified (other than in compliance with the
            provisions of this Agreement and the other Credit Facility
            Documents) or if any portion of the Rents is paid for a period of
            more than one (1) month in advance or if any of the Rents are
            further assigned;

                        (i) if any Borrower shall default beyond the expiration
            of any applicable notice and cure periods in the observance or
            performance of any term, covenant or condition of any Ground Lease
            on the part of any Borrower, as ground lessee thereunder, to be
            observed or performed, unless any such observance or performance
            shall have been waived or not required in writing by the ground
            lessor under such Ground Lease, or if any one or more of the events
            referred to in such Ground Lease shall occur which would or may
            cause such Ground Lease to terminate without notice or action by the
            ground lessor thereunder or which would entitle the ground lessor
            under such Ground Lease to terminate such Ground Lease and the term
            thereof by giving notice to a Borrower, as ground lessee thereunder,
            or if the leasehold estate created by such Ground Lease shall be
            surrendered, in whole or in part, or if such Ground Lease shall be
            terminated or cancelled for any reason or under any circumstance
            whatsoever, or if any of the terms, covenants or conditions of such
            Ground Lease shall in any manner be modified, changed, supplemented,
            altered or amended without the consent of Co-Lenders;

                        (j) if any Borrower or other Person shall be in default
            (beyond any applicable grace and cure period) under any mortgage,
            deed of trust, pledge or other security agreement (including,
            without limitation, any such agreement now or hereafter held by
            Co-Lenders) affecting or relating to any Property, or any other
            Collateral or any portion thereof or under any Material Agreement
            affecting or relating to any Property or any other Collateral, or
            any portion thereof;

                        (k) if any Property shall become subject (i) to any tax
            lien, other than a lien for local real estate taxes and assessments
            not due and payable, or (ii) to any lis pendens, notice of pendency,
            stop order, notice of intention to file mechanic's or materialman's
            lien, mechanic's or materialman's lien or other lien of any nature
            whatsoever, and the same shall not either be discharged of record or
            in the alternative insured over to the satisfaction of Co-Lenders by
            the title company insuring the lien of the Mortgage pertaining to
            the Property in question


                                       52
<PAGE>   57
            within a period of forty five (45) days after the date upon which
            Borrower shall be notified, or shall otherwise have actual
            knowledge, that the same is filed or recorded, and irrespective of
            whether the same is superior or subordinate in lien or other
            priority to the lien of the Mortgages and irrespective of whether
            the same constitutes a perfected or inchoate lien or encumbrance on
            the Properties or any portion thereof or is only a matter of record
            or notice;

                        (l) if for any reason any of the covenants set forth in
            paragraph 13 or paragraph 23 of this Agreement shall at any time
            during the term of the Credit Facility cease to be satisfied and
            complied with in all respects or if any representation or warranty
            set forth in paragraph 22 of this Agreement or elsewhere in the
            Credit Facility Documents shall at any time cease to be true and
            accurate in all material respects;

                        (m) if any Borrower or Guarantor shall make an
            assignment for the benefit of creditors;

                        (n) (1) if a court of competent jurisdiction enters a
            decree or order for relief with respect to any Borrower or Guarantor
            under Title 11 of the United States Code as now constituted or
            hereafter amended or under any other applicable Federal or state
            bankruptcy, insolvency or other similar law, rule or regulation; or
            (2) if such court enters a decree or order appointing a receiver,
            liquidator, assignee, trustee, custodian, examiner, magistrate,
            arbitrator, sequestrator (or similar official) of any Borrowers or
            Guarantor or of any substantial part of their respective properties;
            or (3) if such court decrees or orders the winding up or liquidation
            of the affairs of any Borrower or Guarantor and such order or decree
            is not dismissed, discharged or vacated of record within sixty (60)
            days after the same has been entered;

                        (o) if any Borrower or Guarantor files a petition for
            relief or answer or consent seeking relief under Title 11 of the
            United States Code as now constituted or hereafter amended, or under
            any other applicable Federal or state bankruptcy, insolvency or
            other similar law, rule or regulation, or if any Borrower or
            Guarantor fails to diligently oppose or shall otherwise consent to
            the commencement or prosecution of an involuntary case under Title
            11 of the United States Code as now constituted or hereafter
            amended, or under any other applicable Federal or state bankruptcy,
            insolvency or similar law, rule or regulation, or to the appointment
            of or taking possession by a receiver, liquidator, assignee,
            trustee, custodian, examiner, magistrate, arbitrator, sequestrator
            (or other similar official) of any Borrower or Guarantor or of any
            substantial part of their respective properties, or if any Borrower
            or Guarantor fails generally to pay its respective debts as such
            debts become due, or if any Borrower or Guarantor takes any action
            in furtherance of any action described in this subparagraph;

                        (p) if any Borrower, Guarantor or other Person shall be
            in default beyond the expiration of any applicable notice and cure
            periods under the Facility Notes, the Mortgages, this Agreement or
            any other Credit Facility Document or any other document or
            instrument otherwise executed and delivered in connection therewith
            or in connection with the extension of the Credit Facility by
            Co-Lenders to Borrowers;


                                       53
<PAGE>   58
                        (q) if (except as otherwise specifically provided to the
            contrary in paragraph 18 of this Agreement with respect to WOP and
            the BRT/BOP Limited Partnerships) there shall occur a complete or
            partial suspension or liquidation of all or substantially all of any
            business of any Borrower or any Guarantor and such occurrence in the
            opinion of Co-Lenders has or may have a materially adverse impact on
            any Property or any other Collateral or on the business, assets,
            operations, property, financial or other condition of any Borrower
            or Guarantor;

                        (r) if Borrowers shall fail to furnish or cause to be
            furnished to each Co-Lender, any financial or other information
            required to be provided in accordance with the provisions of this
            Agreement or the other Credit Facility Documents or otherwise
            reasonably requested by Co-Lenders or shall fail to permit, or to
            arrange for, the inspection by Co-Lenders (or their respective
            employees and agents) of any books or records of Borrowers or any
            Guarantor and such default shall continue for twenty (20) days after
            notice by Agent to Borrowers; or

                        (s) if Borrowers shall continue to be in default under
            any of the other terms, covenants or conditions of this Agreement
            for five (5) days after notice from Agent in the case of any default
            which can be cured by the payment of a sum of money, or for twenty
            (20) days after notice from Agent in the case of any other default,
            provided that if such default cannot reasonably be cured within such
            twenty (20) day period and Borrowers, as the case may be, shall have
            commenced to cure such default within such twenty (20) day period
            and thereafter diligently and expeditiously proceeds to cure the
            same, such twenty (20) day period shall be extended for so long as
            it shall require Borrowers, as the case may be, in the exercise of
            due diligence to cure such default, it being agreed, however, that
            no such extension shall be for a period in excess of sixty (60)
            days.

Upon the occurrence of an Event of Default, and for so long as any such Event of
Default continues, Co-Lenders (subject to the terms and provisions of the
Co-Lenders Agreement) (i) shall have no obligation to make any further advances
under the Credit Facility, (ii) shall have the absolute and unconditional right
in their sole and absolute discretion to declare the Debt or any portion thereof
immediately due and payable, (iii) shall have the right to pursue any and all
remedies provided for in this Agreement, the Credit Facility Notes, the
Mortgages, or any of the other Credit Facility Documents or otherwise available
to Co-Lenders, at law or in equity or otherwise, and (iv) shall have the
absolute and unconditional right in their sole and absolute discretion to
terminate the Credit Facility and their obligations with respect thereto under
this Agreement. All remedies afforded to Co-Lenders under this Agreement or
under any of the other Credit Facility Documents are separate and cumulative
remedies and it is agreed that none of such remedies shall be deemed to be in
exclusion of any other remedies available to Co-Lenders and shall not in any
manner limit or prejudice any other legal or equitable remedies which Co-Lenders
may have.

            44. Application of Moneys. All moneys received or collected by
Co-Lenders in respect of the Credit Facility after an Event of Default shall be
applied by Co-Lenders first to the payment of all costs incurred in the
collection of such moneys (including reasonable attorneys' fees and legal
expenses) and second, to the payment of the Debt in such order, priority and
proportions as Co-Lenders may in its sole and absolute discretion determine. The
balance, if any, of such moneys remaining after payment in full of such costs
and the Debt shall be remitted to Borrowers or as otherwise directed by a court
of competent jurisdiction.


                                       54
<PAGE>   59
            45. Right to Cure Defaults. If default beyond any applicable notice
and cure period in the performance of any of the covenants of Borrowers, shall
occur, Co-Lenders may, at their discretion, remedy the same and for such purpose
shall have the right to enter upon the Properties or any portion thereof without
thereby being liable to Borrowers (except in connection with its gross
negligence or willful misconduct) or any Person in possession thereof holding
under Borrowers, and to pay all sums as may be necessary to cure any such
default (including, without limitation any default by Borrowers in the payment
of any Insurance Premiums or any Taxes or other liens or encumbrances covering
the Properties or any part thereof). If Co-Lenders shall remedy such a default
(including, without limitation, any default by Borrowers in the payment of any
Insurance Premiums or any Taxes or other liens or encumbrances covering the
Properties or any part thereof) or appear in, defend or bring any action or
proceeding to protect the interest of Co-Lenders in the Properties, or any
portion thereof, or to foreclose any of the Mortgages or collect the Debt, the
costs and expenses thereof (including reasonable attorneys' fees to the extent
permitted by law) with interest as provided in this paragraph, shall be paid by
Borrowers to Agent upon demand, and shall be added to and constitute part of the
Debt secured by the Mortgages. All such costs and expenses incurred by
Co-Lenders in remedying such default or in appearing in, defending or bringing
any such action or proceeding, shall be paid by Borrowers to Agent upon demand,
with interest at a rate per annum equal to the Default Rate.

            46. Further Assurances. Borrowers agrees to do or cause to be done
all such further reasonable acts and things, and to execute and deliver or cause
to be executed and delivered all such additional conveyances, assignments,
agreements and instruments as Co-Lenders may at any time reasonably request in
connection with the administration or enforcement of this Agreement and the
other Credit Facility Documents or in order better to assure, perfect and
confirm unto Co-Lenders their rights, powers and remedies under this Agreement
and under the other Credit Facility Documents. Nothing contained in this
paragraph shall be construed as obligating Borrowers to provide or to cause to
be provided any collateral or security for the Credit Facility other than as
expressly contemplated by the provisions of this Agreement and the other Credit
Facility Documents.

            47. Costs and Expenses. Borrowers shall pay, or cause to be paid, to
Co-Lenders all costs, fees, expenses and charges incurred by Co-Lenders in
connection with the enforcement of this Agreement and the other Credit Facility
Documents (including without limitation all reasonable fees and disbursements of
Agent's New York City and local legal counsel).

            48. Indemnification of Agent and Co-Lenders. Borrowers shall
indemnify Agent, Co-Lenders, their affiliates, subsidiaries, directors, officers
and employees against all losses, claims, damages, penalties, judgments,
liabilities and reasonable expenses (including, without limitation, all expenses
of litigation or preparation therefor whether or not Agent or Co-Lenders are a
party thereto) which any of them may pay or incur arising out of or relating to
this Agreement, the other Credit Facility Documents, the transactions
contemplated hereby or the direct or indirect application or proposed
application of the proceeds of any advance hereunder, provided, however, that
the aforesaid indemnification shall not apply to any such loss, claim, damage,
penalty, judgment, liability or expense which is incurred by Agent or a
Co-Lender as a result of its gross negligence or willful misconduct. The
obligations of Borrowers under this paragraph shall survive the termination of
this Agreement.

            49. Construction of Agreement. The titles and headings preceding the
paragraphs of this Agreement have been inserted for convenience of reference
only and are not intended to summarize or otherwise describe the


                                       55
<PAGE>   60
subject matter of such paragraphs and shall not be given any consideration in
the construction of this Agreement.

            50. Parties Bound, etc. All of the terms, covenants and provisions
of this Agreement shall be binding upon and inure to the benefit of Borrowers,
Co-Lenders and Agent and their respective successors and assigns. Borrowers
shall not have the right without the prior consent of Co-Lenders (which consent
may be withheld in the sole and absolute discretion of Co-Lenders) to assign or
transfer their respective rights under this Agreement or under any of the other
Credit Facility Documents, in whole or in part, by agreement, operation of law
or otherwise to any other Person, it being agreed that any such assignment or
transfer without the prior consent of Co-Lenders shall be void and of no force
and effect and shall constitute an immediate Event of Default under this
Agreement.

            51. Complete Agreement. NO STATEMENTS, AGREEMENTS OR
REPRESENTATIONS, ORAL OR WRITTEN, WHICH MAY HAVE BEEN MADE BY ANY CO-LENDER, OR
BY ANY EMPLOYEE, AGENT OR BROKER ACTING ON BEHALF OF ANY CO-LENDER, WITH RESPECT
TO THIS AGREEMENT OR THE CREDIT FACILITY SHALL BE OF ANY FURTHER FORCE OR
EFFECT, EXCEPT TO THE EXTENT SPECIFICALLY SET FORTH IN THIS AGREEMENT OR IN THE
OTHER CREDIT FACILITY DOCUMENTS, AND ALL PRIOR AGREEMENTS AND REPRESENTATIONS IN
RESPECT OF THIS AGREEMENT AND THE CREDIT FACILITY ARE MERGED IN THIS AGREEMENT
SO THAT THIS AGREEMENT SHALL CONSTITUTE THE ENTIRE AGREEMENT BETWEEN CO-LENDERS
AND BORROWERS WITH RESPECT TO THE CREDIT FACILITY.

            52. Governing Law. This Agreement shall in all respects be gov-
erned, construed, applied and enforced in accordance with the laws of the State
of New York.

            53. Severability. If any term, covenant, provision or condition of
this Agreement shall be held to be invalid, illegal or unenforceable in any
respect, this Agreement shall be construed without such term, covenant, provi-
sion or condition.

            54. Notices. Any notice, request, demand, statement, authorization,
direction, approval or consent made under this Agreement or under the other
Credit Facility Documents shall be in writing and shall be sent by Federal
Express or other reputable national courier service, or by postage prepaid
registered or certified mail, return receipt requested, and shall be deemed
given (i) when received at the following addresses if sent by Federal Express,
or other reputable national courier service, and (ii) three (3) business days
after being postmarked and addressed as follows if sent by postage prepaid
registered or certified mail, return receipt requested:

            If to Smith Barney:

            Smith Barney Mortgage Capital Group, Inc.
            390 Greenwich Street, 5th Floor
            New York, New York 10013
            Attention:  Clive Bull

            With a copy to:

            Battle Fowler LLP
            Park Avenue Tower
            75 East 55th Street
            New York, New York  10022
            Attention:  Dean A. Stiffle, Esq.


                                       56
<PAGE>   61
            If to NationsBank, in its individual capacity
            or as Agent:

            NationsBank, N.A.
            Real Estate Banking
            8300 Greensboro Drive
            McLean, Virginia 22102-3604
            Attention:  Gary P.F. Carr
                        Vice President

            With a copy to:

            Cadwalader, Wickersham & Taft
            201 South College Street, Suite 1510
            Charlotte, North Carolina 28244
            Attention:  James P. Carroll, Esq.

            If to Borrowers:

            c/o Brandywine Realty Trust
            Newtown Square Corporate Campus
            16 Campus Boulevard, Suite 150
            Newtown Square, Pennsylvania 19073
            Attention:  Gerard H. Sweeney
                        President and Chief Executive Officer

            With a copy to:

            Pepper, Hamilton & Scheetz
            3000 Two Logan Square
            Eighteenth and Arch Streets
            Philadelphia, Pennsylvania 19103-2799
            Attention:  Michael H. Friedman, Esq.

Each party may designate a change of address by notice to the other parties,
given at least fifteen (15) days before such change of address is to become
effective.

            55. Modification. This Agreement may not be modified, amended or
terminated, in whole or in part, except by an agreement in writing executed by
the parties hereto.

            56. Waivers. Co-Lenders may at any time and from time to time waive
any one or more of the terms, covenants, provisions or conditions contained in
this Agreement or in the other Credit Facility Documents, but any such waiver
shall be deemed made in pursuance hereof or thereof and not in modification
thereof, and any such waiver in any particular instance or circumstance shall in
no event or under any circumstance be considered a waiver of any such term,
covenant, provision or condition in any other instance or any other
circumstance.

            57. WAIVER OF TRIAL BY JURY. BORROWERS AND CO-LENDERS HEREBY
IRREVOCABLY AND UNCONDITIONALLY WAIVE ANY AND ALL RIGHTS TO TRIAL BY JURY IN ANY
ACTION, SUIT OR COUNTERCLAIM ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE
RELATING TO THE CREDIT FACILITY NOTES, THE MORTGAGES, THIS AGREEMENT OR ANY
OTHER DOCUMENT OR INSTRUMENT NOW OR HEREAFTER EXECUTED AND DELIVERED IN
CONNECTION THEREWITH OR WITH THE CREDIT FACILITY.

            58. Borrowers' Reliance on Agent's Authority. Unless otherwise
notified by Co-Lenders to the contrary, Borrowers shall have the right to rely
upon any advice they receive from Agent as to any action taken or not taken by
Co-Lenders, or as to any consent or approval given or not given by Co-Lenders,


                                       57
<PAGE>   62
or as to any other action taken or not taken by Co-Lenders, or as to any
decision otherwise made by Co-Lenders, in respect of the Credit Facility or
under or pursuant to the provisions of the Credit Facility Documents, it being
understood that all communication between Borrowers and Co-Lenders in respect of
day to day matters concerning the Credit Facility shall be done through the
offices of Agent.

            59. Authorized Representatives of BRT. The Chief Financial Officer
or the Chief Executive Officer of BRT shall from time to time notify and advise
Agent and Co-Lenders in writing of the officers of BRT who are authorized and
designated to act on behalf of BRT in respect of the Credit Facility and under
and pursuant to the provisions of the Credit Facility Documents, which notice
and advise may be conclusively relied upon by Agent and Co-Lenders.

            60. Exculpation. No recourse shall be had for any obligation of BRT
under this Agreement or any of the other Credit Facility Documents or for any
claim based thereon or otherwise in respect thereof, against any past, present
or future trustee, shareholder, officer or employee of BRT, whether by virtue of
any statute or rule of law, or by the enforcement of any assessment or penalty
or otherwise, all such liability being expressly waived and released by each
other party to this Agreement and the other Credit Facility Documents.


                                       58
 
<PAGE>   63
            IN WITNESS WHEREOF, Initial Co-Lenders, Borrowers and Agent have
duly executed this Agreement as of the day and year first above written.

                              SMITH BARNEY MORTGAGE CAPITAL GROUP, INC.,
                              a Delaware corporation

                              By:   _________________________________
                                    Name:   Clive Bull
                                    Title:  Vice President

                              NATIONSBANK, N.A., a national banking
                              association, acting in its individual
                              capacity

                              By:   _________________________________
                                    Name:   Gary P.F. Carr
                                    Title:  Vice President

                              BRANDYWINE REALTY TRUST, a Maryland
                              real estate investment trust

                              By:   _________________________________
                                    Name:   Gerard H. Sweeney
                                    Title:  President and Chief
                                            Executive Officer

                              BRANDYWINE OPERATING PARTNERSHIP, L.P.

                              By:   Brandywine Realty Trust, a Maryland
                                    real estate investment trust, its
                                    general partner

                                    By:   ___________________________
                                          Name:   Gerard H. Sweeney
                                          Title:  President and Chief
                                                  Executive Officer

                              LC/N HORSHAM LIMITED PARTNERSHIP, a
                              Pennsylvania limited partnership
 
                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:_________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                       59
<PAGE>   64
                              LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              NICHOLS LANSDALE LIMITED PARTNERSHIP III,
                              a Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              NEWTECH III LIMITED PARTNERSHIP, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                       60
<PAGE>   65
                              NEWTECH IV LIMITED PARTNERSHIP, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              C/N OAKLANDS LIMITED PARTNERSHIP I, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              FIFTEEN HORSHAM, L.P., a Pennsylvania
                              limited partnership

                              By:   Witmer Operating Partnership I,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                       61
<PAGE>   66
                              C/N LEEDOM LIMITED PARTNERSHIP II, a
                              Pennsylvania limited partnership


                              By:   Brandywine Operating Partnership,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Realty Trust, a
                                          Maryland real estate
                                          investment trust, its general
                                          partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              C/N IRON RUN LIMITED PARTNERSHIP III, a
                              Pennsylvania limited partnership

                              By:   Brandywine Operating Partnership,
                                    L.P., a Delaware limited
                                    partnership, its general partner

                                    By:   Brandywine Realty Trust, a
                                          Maryland real estate
                                          investment trust, its general
                                          partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              NATIONSBANK, N.A., a national banking
                              association, acting in its capacity as
                              administrative and documentation agent

                              By: ________________________
                                    Name:   Gary P.F. Carr
                                    Title:  Vice President


                                       62
<PAGE>   67
                                    EXHIBIT A

                          (Definition of Certain Terms)


Additional Property: The term "Additional Property" as used in this Agreement
shall mean any property acquired by Borrowers subsequent to the date of this
Agreement.

Affiliate: The term "Affiliate" as used in this Agreement shall mean any Person
directly or indirectly controlling, controlled by or under direct or indirect
common control with any other Person. A Person shall be deemed to control
another Person if the controlling Person owns fifty-one (51%) percent or more of
any class of voting securities of the controlled Person or possesses, directly
or indirectly, the power to direct or cause the direction of the management or
policies of the controlled Person, whether through ownership of stock by
contract or otherwise.

Agent: The term "Agent" as used in this Agreement shall have the meaning given
to such term in the preamble to this Agreement.

Agreement: The term "Agreement" as used in this Agreement shall mean this
Agreement.

Alternate Credit Rate: The term "Alternate Credit Rate" as used in this
Agreement shall have the meaning given to such term in paragraph 1(ii) of
Exhibit B to this Agreement.

Appraised Value: The term "Appraised Value" as used in this Agreement shall mean
(i) with respect to each Initial Property, the "as is" appraised value of such
Initial Property, if and when approved by Initial Lenders in accordance with the
provisions of paragraph 10(iv) of the main body of this Agreement, and (ii) with
respect to any Additional Property, either (y) the "as is" appraised value of
such Additional Property, as set forth in the appraisal prepared in connection
with its inclusion in the collateral pool for the Credit Facility if the fair
market value of such Additional Property, as set forth in such appraisal is
approved without adjustment by Co-Lenders holding in the aggregate not less than
2/3 of the undivided Total Credit Facility Percentage Interests or (z) the
Weighted Average Adjusted Appraised Value of such Additional Property, if the
fair market value of such Additional Property as set forth in such appraisal is
approved with downward adjustment in value by Co-Lenders holding in excess of
1/3 of the undivided Total Credit Facility Percentage Interests, as the same may
be updated in accordance with the provisions of paragraph 14 of this Agreement.

Approved Value: The term "Approved Value" as used in this Agreement shall have
the meaning given to such term in paragraph 13 of the main body of this
Agreement.

Assignments of Leases and Rents: The term "Assignments of Leases and Rents" as
used in this Agreement shall mean the Assignments of Leases and Rents to be
given by Borrowers to Agent, as security for the payment of the Debt and
constituting a first lien on all of Borrowers's right, title and interest now
owned or hereafter acquired in and to all Leases and Rents pertaining to or
derived from the Properties, the form of which is attached to this Agreement as
Exhibit I.

Base LIBOR Rate: The term "Base LIBOR Rate" as used in this Agreement shall have
the meaning given to such term in paragraph 1(v) of Exhibit B to this Agreement.
<PAGE>   68
Borrowers:  The term "Borrowers" as used this Agreement shall have the meaning
given to such term in the preamble to this Agreement.

BOP: The term "BOP" as used in this Agreement shall have the meaning given to
such term in the preamble to the main body of this Agreement.

BRP:  The term "BRP" as used in this Agreement shall mean Brandywine Realty
Partners, a Pennsylvania general partnership.

BRSC: The term "BRSC" as used in this Agreement shall mean Brandywine Realty
Services Corporation, a Pennsylvania corporation.

BHI: The term "BHI" as used in this Agreement shall mean Brandywine Holdings I,
Inc., a Pennsylvania corporation.

BRT: The term "BRT" as used in this Agreement shall have the meaning given to
such term in the preamble to the main body of this Agreement.

business day: The term "business day" shall have the meaning given to such terms
in paragraph 1(ii) of Exhibit B to this Agreement.

Business Day: The term "Business Day" as used in this Agreement shall have the
meaning given to such term in paragraph 1(i) of Exhibit B to this Agreement.

Capitalization Rate Value: The term "Capitalization Rate Value" as used in this
Agreement shall have the meaning given to such term in paragraph 13 of the main
body of this Agreement.

Cash Flow: The term "Cash Flow" as used in this Agreement shall (as the context
requires) have the meaning given to such term in paragraph 13 and/or paragraph
23(z) of the main body of this Agreement.

Casualty Retainage: The term "Casualty Retainage" shall as used in this
Agreement shall have the meaning given to such term in paragraph 30 of the main
body of this Agreement.

Co-Lenders: The term "Co-Lenders" as used in this Agreement shall mean,
collectively, Initial Co-Lenders, and all other parties from time to time to
whom direct interests in the Credit Facility are sold, transferred and assigned
and who are as a result thereof designated as Co-Lenders, under and pursuant to
the provisions of this Agreement and the Co-Lenders Agreement.

Co-Lenders Agreement: The term "Co-Lenders Agreement" as used in this Agreement
shall mean that certain Co-Lender and Servicing Agreement dated the date hereof
by and among Smith Barney and NationsBank, in its individual capacity and as
Agent, as the same may be amended from time to time.

Co-Lenders Certificate: The term "Co-Lenders Certificate" as used in this
Agreement shall have the meaning given to such term in paragraph 25 of the main
body of this Agreement.

Collateral: The term "Collateral" as used in this Agreement shall mean all of
the now existing or hereafter acquired right, title and interest of Borrowers in
and to (a) the Initial Properties, (b) the Additional Properties which are
included in the collateral pool for the Credit Facility, (c) all Leases, Rents,
easements, options, personal property and other rights or property related to
the ownership or operation of the Properties which are included from time to
time in the collateral pool for the Credit Facility, (d) any other collateral
now or hereafter delivered to Co-Lenders pursuant to the provisions of this
Agreement or the other Credit Facility Document as collateral for the Credit
Facility and (e) all proceeds of the foregoing.


                                       A-2
<PAGE>   69
Commitment: The term "Commitment" as used in this Agreement shall mean that
certain Commitment Letter dated November 6, 1996 by and among Smith Barney,
NationsBank, BRT and BOP.

Commitment Fee: The term "Commitment" as used in this Agreement shall have the
meaning given to such term in paragraph 19 of the main body of this Agreement.

Consultant: The term "Consultant" as used in this Agreement shall have the
meaning given to such term in paragraph 30 of the main body of this Agreement.

Credit Facility: The term "Credit Facility" as used in this Agreement shall have
the meaning given to such term in the Preliminary Statement on the first page of
the main body of this Agreement.

Credit Facility Administration Fee: The term "Credit Facility Administration
Fee" as used in this Agreement shall have the meaning given to such term in
paragraph 20 of the main body of this Agreement.

Credit Facility Documents: The term "Credit Facility Documents" as used in this
Agreement shall collectively mean this Agreement, the Credit Facility Notes, the
Mortgages, the Assignments of Leases and Rents, the Guaranty of Payment, the
Hazardous Material Guaranty and Indemnification Agreement and all other
documents and instruments of any nature whatsoever now or hereafter executed and
delivered in connection with this Agreement or the Credit Facility, as any of
the same may from time to time be amended, modified, extended, supplemented,
renewed, replaced or restated.

Credit Facility Notes: The term "Credit Facility Notes" as used in this
Agreement shall mean, collectively, the following: (i) that certain Note dated
the date hereof in the original principal amount of $40,000,000.00 given by
Borrowers to Smith Barney, and (ii) that certain Note dated the date hereof in
the original principal amount of $40,000,000.00 given by Borrowers to
NationsBank, as such Notes may from time to time be amended, modified, extended,
supplemented, renewed, replaced or restated.

Credit Facility Outstanding: The term "Credit Facility Outstanding" as used in
this Agreement shall have the meaning given to such term in paragraph __ of the
main body of this Agreement.

Credit Facility Percentage Interests: The term "Credit Facility Percentage
Interests" as used in this Agreement shall have the meaning given to such term
in paragraph 2 of the main body of this Agreement.

Damaged Property: The term "Damaged Property" as used in this Agreement shall
have the meaning given to such term in paragraph 30 of the main body of this
Agreement.

Debt: The term "Debt" as used in this Agreement shall mean all principal,
interest, additional interest and other sums of any nature whatsoever which may
or shall become due and payable to Co-Lenders in accordance with the provisions
of the Credit Facility Documents.

Debt-to-Tangible Net Worth Requirement: The term "Debt-to-Tangible Net Worth
Requirement" as used in this Agreement shall have the meaning given to such term
in paragraph 23(cc) of the main body of this Agreement.

default: The term "default" as used in this Agreement shall mean the occurrence
of any default by Borrowers or any other Person in the observance or performance
of any of the terms, covenants or provisions of this Agreement, the Credit
Facility Notes, the Mortgages or the other Credit Facility Documents on the part
of Borrowers or such other Person to be observed or


                                       A-3
<PAGE>   70
performed without regard to whether such default constitutes or would upon
notice or lapse of time, or both, constitute an Event of Default under this
Agreement, the Credit Facility Notes, the Mortgages or the other Credit Facility
Documents.

Default Rate: The term "Default Rate" as used in this Agreement shall, to the
extent necessary, be determined on a daily basis and shall be equal to four (4%)
percent plus the greater on a daily basis of (i) the weighted average of the
LIBOR Rates, if any, from time to time, applicable to the Credit Facility Notes,
and (ii) the Floating Rate, provided, however, that the Default Rate shall in no
event exceed the maximum interest rate permitted by applicable law. The Default
Rate shall be calculated for the actual number of days elapsed on the basis of a
360-day calendar year.

Development: The term "Development" as used in this Agreement shall mean any
improvements which are to be constructed on any unimproved land owned and/or
controlled either directly or indirectly by Borrowers or to be acquired by
Borrowers, and any additions which are to be added to any improved property
owned and/or controlled either directly or indirectly by Borrowers (irrespective
of whether constituting part of the collateral pool for the Credit Facility) and
which additions will increase the square footage of the improvements (rentable
or otherwise) located on any such improved property.

Environmental Requirements: The term "Environmental Requirements" as used in
this Agreement shall have the meaning given to such term in paragraph 32 of the
main body of this Agreement.

Environmental Reports: The term "Environmental Reports" as used in this
Agreement (i) shall mean in respect of the Initial Properties, the environmental
reports listed on Schedule 5 attached hereto, and (ii) shall mean in respect of
any Additional Property which is added to the collateral pool for the Credit
Facility from time to time, the environmental reports delivered to and approved
by Co-Lenders, in accordance with the provisions of paragraph 1(1) of Exhibit E
attached hereto.

ERISA: The term "ERISA" as used in this Agreement shall have the meaning given
to such term in paragraph 22(u) of the main body of this Agreement.

Events of Default: The term "Events of Default" as used in this Agreement shall
have the meaning given to such term in paragraph 43 of the main body of this
Agreement.

Federal Funds Effective Rate: The term "Federal Funds Effective Rate" as used in
this Agreement shall have the meaning given to such term in paragraph 1(ii) of
Exhibit B to this Agreement.

FF&E: The term "FF&E" as used in this Agreement shall mean, collectively, all
goods (as such term is defined in the Uniform Commercial Code), now owned or
hereafter acquired by Borrowers, located at or used in connection with the
Properties and the operation of the Properties, including, without limitation,
(i) all furniture and furnishings and all other items of personal property
(including inventory now owned or hereafter acquired by Borrowers but excluding
inventory and personal property owned by Lessee or any Other Lessee) located on,
or used in connection with the operation of the Properties, together with all
replacements, modifications, alterations and additions thereto; and (ii) all
equipment, machinery, fixtures and other items of property required or
incidental to the use of the Properties, including all components thereof, now
and hereafter permanently affixed to or incorporated into the Properties,
including, without limitation, all furnaces, boilers, heaters, electrical
equipment, heating, plumbing, lighting, ventilating, refrigerating,
incineration, air and water pollution control, waste, disposal, air-cooling and
air conditioning systems and apparatus, sprinkler systems and


                                       A-4
<PAGE>   71
fire and theft protection equipment, all of which to the greatest extent
permitted by law are deemed by the parties hereto to constitute real estate,
together with all replacements, modifications, alterations and additions
thereto.

Financing Statements: The term "Financing Statements" as used in this Agreement
shall mean Uniform Commercial Code Financing Statements, in form and content
acceptable to Co-Lenders.

FIRREA: The term "FIRREA" as used in this Agreement shall mean the Financial
Institutions Reform, Recovery and Enforcement Act.

Fixed Charge Coverage Ratio: The term "Fixed Charge Coverage Ratio" as used in
this Agreement shall have the meaning given to such term in paragraph 23(bb) of
the main body of this Agreement.

Floating Rate: The term "Floating Rate" as used in this Agreement shall have the
meaning given to such term in paragraph 1(ii) of Exhibit B to this Agreement.

GAAP: The term "GAAP" shall mean generally accepted accounting practices
consistently applied.

Governmental Authority: The term "Governmental Authority" as used in this
Agreement shall have the meaning given to such term in paragraph 32 of the main
body of this Agreement.

Ground Leases: The term "Ground Leases" as used in this Agreement shall mean
collectively, (i) that certain Ground Lease dated as of May 31, 1988, between
Woodlawn Trustees, Incorporated, as ground lessor, and Donahoe Wilmington
Associates One Limited Partnership, as ground lessee, and recorded on June 3,
1988, in the Office of the Recorder of Deeds for New Castle County, Delaware in
Deed Book 711, page 34, the ground lessees interest in which (x) was assigned by
Michael P. Walsh, Sheriff of New Castle County, Delaware, to New York Life
Insurance and Annuity Corporation by Deed dated March 15, 1995, and recorded in
the aforesaid Recorder's Office in Deed Book 1895, page 253, (y) was further
assigned by New York Life Insurance and Annuity Corporation to KB Fund II by
Assignment and Assumption Agreement dated as of June 29, 1995, and recorded on
July 14, 1995, in the aforesaid Recorder's office in Deed Book 1949, page 301,
and (x) was further assigned by KB Fund II to BOP by Assignment and Assumption
of Ground Lease dated December 2, 1996, and intended to be duly recorded in the
aforesaid Recorder's office, and pursuant to which Ground Lease, as so assigned,
BOP holds a leasehold estate in the Initial Property commonly known as the
Delaware Corporate Center, New Castle County Delaware, and (ii) any other ground
lease pursuant to which Borrowers now or hereafter hold a leasehold estate in
any Property which is included from time to time in the collateral pool for the
Credit Facility.

Guarantor: The term "Guarantor" as used in this Agreement shall collectively
mean WOP, BRP and BRSC.

Guaranty of Payment: The term "Guaranty of Payment" as used in this Agreement
shall mean that certain Guaranty of Payment dated the date hereof given by
Guarantors to Agent, the form of which is attached hereto as Exhibit J.

Hazardous Material: The term "Hazardous Material" as used in this Agreement
shall have the meaning given to such term in paragraph 32 of the main body of
this Agreement.

Hazardous Material Guaranty and Indemnification Agreement: The term "Hazardous
Material Guaranty and Indemnification Agreement" as used in this Agreement shall
mean that certain Hazardous Material Guaranty and


                                       A-5
<PAGE>   72
Indemnification Agreement dated the date hereof given by Guarantors to Agent,
the form of which is attached hereto as Exhibit K.

Initial Lenders: The term "Initial Lenders" as used in this Agreement shall
collectively mean Smith Barney and NationsBank.

Initial Properties: The term "Initial Properties" as used in this Agreement
shall meaning those Properties constituting part of the original collateral pool
for the Credit Facility, as more particularly described in Exhibit F attached
hereto.

Insurance Policies: The term "Insurance Policies" as used in this Agreement
shall have the meaning given to such term in paragraph 30 of the main body of
this Agreement.

Insurance Premiums: The term "Insurance Premiums" as used in this Agreement
shall have the meaning given to such term in paragraph 30 of the main body of
this Agreement.

Interest Period: The term "Interest Period" as used in this Agreement shall have
the meaning given to such term in paragraph 1(iii) of Exhibit B to this
Agreement.

Internal Revenue Code: The term "Internal Revenue Code" as used in this
Agreement shall mean the Internal Revenue Code of 1986, as amended, or any
successor statute.

L/C Issuer: The term "L/C Issuer" as used in this Agreement shall have the
meaning given to such term in paragraph 3 of the main body of this Agreement.

Leases: The term "Leases" as used in this Agreement shall mean collectively mean
all leases, licenses and other agreements (other than the Ground Leases) now or
hereafter entered into and affecting or relating to the use or occupancy of the
Properties from time to time constituting part of the collateral pool for the
Credit Facility.

Letter of Credit: The term "Letter of Credit" as used in this Agreement shall
have the meaning given to such term in paragraph 3 of the main body of this
Agreement.

Letter of Credit Facility: The term "Letter of Credit Facility" as used in this
Agreement shall have the meaning given to such term in paragraph 3 of the main
body of this Agreement.

Letter of Credit Fee: The term "Letter of Credit Fee" as used in this Agreement
shall have the meaning given to such term in paragraph 5 of the main body of
this Agreement.

LIBOR Rate: The term "LIBOR Rate" as used in this Agreement shall have the
meaning given to such term in paragraph 1(iv) of Exhibit B to this Agreement.

Loan to Value Requirement: The term "Loan to Value Requirement" as used in this
Agreement shall have the meaning given to such term in paragraph 13 of the main
body of this Agreement.

Material Agreements: The term "Material Agreements" as used in this Agreement
shall mean all Ground Leases, REAs, condominium declarations and related
documents and all other agreements which in the judgment of Co-Lenders are
material to the value, use, operation or management of any Property from time to
time constituting part of the collateral pool for the Credit Facility, or the
modification, amendment or termination of which could or would in the judgment
of Co-Lenders have a material adverse effect on the value, use,


                                      A-6
<PAGE>   73
operation or management of any Property from time to time constituting part of
the collateral pool for the Credit Facility.

Maturity Date: The term "Maturity Date" shall have the meaning given to such
term in paragraph 7 of the main body of this Agreement.

Minimum Debt Service Coverage Ratio: The term "Minimum Debt Service Coverage
Ratio" as used in this Agreement shall have the meaning given to such term in
paragraph 23(z) of the main body of this Agreement.

Mortgages: The term "Mortgages" as used in this Agreement shall mean fully cross
defaulted and cross collateralized blanket mortgages and deeds of trust
constituting a first lien on the fee and leasehold estates of Borrowers in all
Properties constituting part of the collateral pool for the Credit Facility from
time to time to be executed and delivered by Borrowers to or for the benefit of
Agent and securing payment in full of the Debt, the forms of which are attached
hereto as Exhibits G (mortgage) and H (deed of trust).

NAREIT: The term "NAREIT" as used in this Agreement shall mean the National
Association of Real Estate Investment Trusts.

NationsBank: The term "NationsBank" as used in this Agreement shall have the
meaning given to such term in the preamble to the main body of this Agreement.

Net Proceeds: The term "Net Proceeds" as used in this Agreement shall have the
meaning given to such term in paragraph 30 of the main body of this Agreement.

Net Proceeds Deficiency: The term "Net Proceeds Deficiency" as used in this
Agreement shall have the meaning given to such term in paragraph 30 of the main
body of this Agreement.

Other Debt: The term "Other Debt" as used in this Agreement shall have the
meaning given to such term in paragraph 23(y) of the main body of this
Agreement.

Other Permitted Debt: The term "Other Permitted Debt" as used in this Agreement
shall have the meaning given to such term in paragraph 23(y) of this Agreement.

Other Secured Debt: The term "Other Secured Debt" as used in this Agreement
shall have the meaning given to such term in paragraph 23(y) of this Agreement.

Other Unsecured Debt: The term "Other Unsecured Debt" as used in this Agreement
shall have the meaning given to such term in paragraph 23(y) of this Agreement.

Participant: The term "Participant" as used in this Agreement shall have the
meaning given to such term in paragraph 25 of the main body of this Agreement.

Permitted Title Exceptions: The term "Permitted Title Exceptions" as used in
this Agreement shall mean those matters set forth in the title insurance
policies insuring the respective liens of the Mortgages on the date hereof and
those matters otherwise approved in writing by Co-Lenders.

Person: The term "Person" as used in this Agreement shall mean an individual, a
corporation, a firm, a limited or general partnership, an association, a joint
venture or any other entity or organization, including a governmental or
political subdivision or an agent or instrumentality thereof.


                                       A-7
<PAGE>   74
Properties: The term "Properties" as used in this Agreement shall mean the
properties (including, without limitation; the Initial Properties) from time to
time constitutes part of the collateral pool for the Credit Facility.

Prime Rate: The term "Prime Rate" as used in this Agreement shall have the
meaning given to such term in paragraph 1(ii) of Exhibit B to this Agreement.

Principal Balance: The term "Principal Balance" as used in this Agreement shall
have the meaning given to such term in paragraph 1(vi) of Exhibit B to this
Agreement.

REA: The term "REA" as used in this Agreement shall mean, with respect to any
individual Property, any executed and delivered comprehensive reciprocal
easement and operating agreement which encumbers a Property and which either
benefits such Property or will enhance the integrated use, operation and
management of such Property.

Regulation D: The term "Regulation D" as used in this Agreement shall have the
meaning given to such term in paragraph 6(a) of the main body of this Agreement.

Reinvestment Rate: The term "Reinvestment Rate" as used in this Agreement shall
have the meaning given to such term in paragraph 10 of Exhibit B to this
Agreement.

Renovation: The term "Renovation" as used in this Agreement shall mean any
renovation to an improved property owned and/or controlled either directly or
indirectly by Borrowers (irrespective of whether constituting part of the
collateral pool for the Credit Facility) which does not constitute an additional
Development of such property.

Rents: The term "Rents" as used in this Agreement shall mean all rents,
royalties, issues, profits, rent equivalent income, security deposits, insurance
proceeds, tax refunds, any other revenues, income benefits or proceeds of any
nature whatsoever generated by, arising from or otherwise relating to the
Properties.

Request for Advance: The term "Request for Advance" as used in this Agreement
shall have the meaning given to such term in paragraph 9 of the main body of
this Agreement.

Required Due Diligence Materials: The term "Required Due Diligence Materials" as
used in this Agreement shall mean all materials required by paragraph 1 of
Exhibit E of this Agreement.

Re-Set Date: The term "Re-Set Date" as used in this Agreement shall have the
meaning given to such term in paragraph 1(vii) of Exhibit B to this Agreement.

Roll Over Date: The term "Roll Over Date" as used in this Agreement shall have
the meaning given to such term in paragraph 1(viii) of Exhibit B to this
Agreement.

Smith Barney: The term "Smith Barney" as used in this Agreement shall have the
meaning given to such term in preamble to the main body of this Agreement.

Supplemental Debt Service Coverage Ratio: The term "Supplemental Debt Service
Coverage Ratio" as used in this Agreement shall have the meaning given to such
term in paragraph 23(aa) of the main body of this Agreement.

Tangible Net Worth: The term "Tangible Net Worth" as used in this Agreement
shall have the meaning given to such term in paragraph 23(uu) of the main body
of this Agreement.


                                       A-8
<PAGE>   75
Taxes: The term "Taxes" as used in this Agreement shall have the meaning given
to such term in paragraph 29 of the main body of this Agreement.

Telerate Page 3750: The term "Telerate Page 3750" as used in this Agreement
shall have the meaning given to such term in paragraph 1(iv) of Exhibit B to
this Agreement.

Title Company: The term "Title Company" as used in this Agreement shall mean
Commonwealth Land Title Insurance Company, a Pennsylvania corporation, or such
other title company as may be designated by Borrowers from time to time and
approved by Co-Lenders.

Total Credit Facility Percentage Interests: The term "Total Credit Facility
Percentage Interests" as used in this Agreement shall mean the respective
undivided percentage interests held by each Co-Lender in the entire Credit
Facility (inclusive of any risk participations in any Letter of Credit which is
issued and is outstanding under the Credit Facility), which on the date hereof
are as follows: Smith Barney - 50% and NationsBank 50%.

Total Earnings: The term "Total Earnings" as used in this Agreement shall mean
the consolidated earnings of Borrowers before minority interests, interest,
taxes, depreciation and amortization, as determined on a consolidated basis and
according to GAAP, for the period in question. Total Earnings will be calculated
on the basis of the four complete calendar quarters preceding the date of
determination, with the exception that during 1997, the calculation shall be
based on complete calendar quarters commencing with the calendar quarter
beginning on October 1, 1996.

Unused Facility Fee: The term "Unused Facility Fee" as used in this Agreement
shall have the meaning given to such term in paragraph 21 of the main body of
this Agreement.

Unused Portion: The term "Unused Portion" as used in this Agreement shall be
calculated on a daily basis and shall mean, $80,000,000 less the sum of (i) the
daily weighted average of the outstanding principal balance of the Credit
Facility Notes and (ii) the daily weighted average of the aggregate amount
available for draw under all outstanding Letters of Credit.

Weighted Average Adjusted Appraised Value: The term "Weighted Average Adjusted
Apprised Value" as used in this Agreement shall have the meaning given to such
term in paragraph 12 of the main body of this Agreement.

WOP:  The term "WOP" as used in this Agreement shall mean Witmer Operating
Partnership I, L.P., a Delaware limited partnership.


                                       A-9
<PAGE>   76
                                    EXHIBIT B

                      (Credit Facility Payment Provisions)


            1. The following terms as used in this Exhibit shall have the
following meanings:

            (i) The term "Business Day" shall mean any day on which Agent is
      open for business in the city in which its principal office is located and
      on which commercial banks in the City of London, England are open for
      dealings in U.S. dollar deposits in the London Interbank Market, provided,
      however, that during any period of time during which the entire Principal
      Balance is bearing interest at the Floating Rate in accordance with the
      provisions of this Note hereinafter set forth, the term "Business Day"
      shall mean any day on which Agent is open for business in the city in
      which its principal office is located.

           (ii) The term "Floating Rate" shall mean a rate per annum equal to 25
      basis points plus the greater on a daily basis of (a) the Prime Rate, or
      (b) the Alternate Credit Rate. The term "Prime Rate" shall mean such rate
      of interest as is publicly announced by NationsBank or other comparable
      bank designated by Agent at its principal office from time to time as its
      prime rate. Any change in the Prime Rate shall be effective on the date
      such change is announced by NationsBank or other comparable bank
      designated by Agent. The term "Alternate Credit Rate" shall mean a rate
      per annum equal to 50 basis points plus the Federal Funds Effective Rate
      from time to time. The "Federal Funds Effective Rate" shall to the extent
      necessary be determined by Agent separately for each day during the term
      of the Credit Facility and shall for each such day be a rate per annum
      equal to the weighted average of the rates on overnight Federal funds
      transactions with members of the Federal Reserve System arranged by
      Federal funds brokers, as published for each such day (or if any such day
      is not a business day, for the next immediately preceding business day) by
      the Federal Reserve Bank of New York, or if the weighted average of such
      rates is not so published for any such day which is a business day, the
      average of the quotations for any such day on such transactions received
      by Agent from three Federal funds brokers of recognized standing selected
      by Agent. The term "business day" as used in the preceding sentence of
      this subparagraph shall mean any day on which the Federal Reserve Bank of
      New York is open for business. Any change in the Floating Rate as a result
      of a change in the Prime Rate or the Federal Funds Effective Rate shall be
      effective on the effective date of any such change in the Prime Rate or
      the Federal Funds Effective Rate, as the case may be. If for any reason
      Agent shall have determined (which determination shall be conclusive and
      binding on Borrowers) that Agent is unable to ascertain the Federal Funds
      Effective Rate for any reason, including, without limitation, the
      inability or failure of Agent to obtain sufficient bids for the purposes
      of determining the Federal Funds Effective Rate in accordance with the
      provisions of this subparagraph, the Floating Rate shall be determined on
      the basis of the Prime Rate until the circumstances giving rise to such
      inability no longer exist. The Floating Rate shall be calculated for the
      actual number of days elapsed on the basis of a 360-day year. Each
      determination of the Floating Rate shall be made by Agent and shall be
      conclusive and binding upon Borrowers absent manifest error.

          (iii) The term "Interest Period" shall mean the period of time during
      which a particular LIBOR Rate will be applicable to all or any particular
      portion of the Principal Balance in accordance with the provisions of this
      Exhibit, it being agreed that (a) each Interest Period shall commence and
      shall terminate on a Re-Set Date, (b) each


                                       B-1
<PAGE>   77
      Interest Period shall be of a duration of either one month, two months or
      three months, (c) no Interest Period shall extend beyond the Maturity
      Date, and (d) the portion of the Principal Balance with respect to which a
      particular Interest Period is applicable will bear interest at the LIBOR
      Rate pertaining to such Interest Period from and including the first day
      of such Interest Period to, but not including, the last day of such
      Interest Period.

           (iv) The "LIBOR Rate" applicable to a particular Interest Period
      shall mean a rate per annum equal to 175 basis points plus the Base LIBOR
      Rate applicable to such Interest Period. The "Base LIBOR Rate" applicable
      to a particular Interest Period shall mean a rate per annum equal to the
      rate for U.S. dollar deposits with maturities comparable to such Interest
      Period which appears on Telerate Page 3750 as of 11:00 a.m., London time,
      two (2) Business Days prior to the commencement of such Interest Period,
      provided, however, that if such rate does not appear on Telerate Page
      3750, the "Base LIBOR Rate" applicable to such Interest Period shall mean
      a rate per annum equal to the rate at which U.S. dollar deposits in an
      amount approximately equal to the Principal Balance (or the portion
      thereof which will bear interest at a LIBOR Rate during the Interest
      Period to which such Base LIBOR Rate is applicable in accordance with the
      provisions of this Exhibit), and with maturities comparable to the last
      day of the Interest Period with respect to which such Base LIBOR Rate is
      applicable, are offered in immediately available funds in the London
      Interbank Market to the London office of NationsBank or other comparable
      bank designated by Agent by leading banks in the Eurodollar market at
      11:00 a.m., London time, two (2) Business Days prior to the commencement
      of the Interest Period to which such Base LIBOR Rate is applicable. The
      term "Telerate Page 3750" means the display designated as "Page 3750" on
      the Associated Press-Dow Jones Telerate Service (or such other page as may
      replace Page 3750 on the Associated Press-Dow Jones Telerate Service or
      such other service as may be nominated by the British Bankers' Association
      as the information vendor for the purpose of displaying British Bankers'
      Association interest settlement rates for U.S. dollar deposits). Any Base
      LIBOR Rate determined on the basis of the rate displayed on Telerate Page
      3750 in accordance with the foregoing provisions of this subparagraph
      shall be subject to corrections, if any, made in such rate and displayed
      by the Associated Press-Dow Jones Telerate Service within one hour of the
      time when such rate is first displayed by such Service. Each determination
      of the LIBOR Rate and the Base LIBOR Rate applicable to a particular
      Interest Period shall be made by Agent and shall be conclusive and binding
      upon Borrowers absent manifest error. Interest at the applicable LIBOR
      Rate from time to time shall be calculated for the actual number of days
      elapsed on the basis of a 360-day year.

            (v) The term "Maturity Date" shall mean December 1, 1998.

            (vi) The term "Principal Balance" shall mean the outstanding
      principal balance of the Credit Facility from time to time.

            (vii) The term "Re-Set Date" shall mean the first day of the first
      calendar month which is not less than three (3) Business Days after the
      first advance under the Credit Facility. Each subsequent Re-Set Date
      during the term of the Credit Facility shall be the date in each
      subsequent calendar month during the term of the Credit Facility which
      numerically corresponds to the first Re-Set Date during the term of the
      Credit Facility, provided, however, that if the numerically corresponding
      date in any such subsequent calendar month during the term of the Credit
      Facility shall not be a Business Day, the Re-Set Date for such calendar
      month shall be the next succeeding Business Day, unless the next such
      succeeding Business Day would fall in the next calendar


                                       B-2
<PAGE>   78
      month, in which event the Re-Set Date for such calendar month shall be the
      next preceding Business Day. For the purposes of this Exhibit the period
      of time between any two consecutive Re-Set Dates during the term of the
      Credit Facility shall be deemed to be a period of one month.

         (viii) The "Roll Over Date" applicable to a particular Interest Period
      shall mean the last day of such Interest Period, it being understood that
      each such Roll Over Date shall fall on a Re-Set.

            2. The Principal Balance or so much thereof may be advanced and
readvanced by Co-Lenders to Borrowers and be outstanding from time to time in
accordance with the provisions of this Agreement, with interest thereon from and
including the date of this Agreement to, but not including, the date the
Principal Balance is paid in full calculated in the manner hereinafter set
forth, as follows:

      (i) interest on the Principal Balance calculated in the manner hereinafter
set forth shall be due and payable in Federal funds or other immediately
available funds on each Re-Set Date during the term of the Credit Facility; and

      (ii) the entire Principal Balance, together with all interest accrued and
unpaid thereon calculated in the manner hereinafter set forth and all other sums
due in respect of the Credit Facility in accordance with the Credit Facility
Documents, shall be due and payable on the Maturity Date.

            3. All payment in respect of the Principal Balance, interest on the
Principal Balance and all other sums which may or shall become due and payable
in respect of the Credit Facility in accordance with the provisions of the
Credit Facility Notes, this Agreement and the other Credit Facility Documents
shall (except to the extent otherwise specifically provided to the contrary in
the Credit Facility Documents) be paid to Agent for the equal and ratable
benefit of Co-Lenders.

            4. From and including the date of the initial advance of the Credit
Facility pursuant to the provisions of this Agreement to, but not including, the
first Re-Set Date during the term of the Credit Facility, the entire Principal
Balance shall bear interest at the Floating Rate. From and including the first
Re-Set Date during the term of the Credit Facility to, but not including, the
last Re-Set Date during the term of the Credit Facility, the entire Principal
Balance shall, except as specifically provided to the contrary in this paragraph
and in paragraph 6 and paragraph 11 of this Exhibit, bear interest at one or
more of the available LIBOR Rates. The available LIBOR Rates shall consist of a
one-month LIBOR Rate, a two-month LIBOR Rate and a three-month LIBOR Rate
determined in accordance with the provisions of paragraph 1 (iv) and paragraph 6
of this Exhibit, it being agreed that (i) Borrowers shall have the right to
select the LIBOR Rate or Rates from time to time applicable to the Principal
Balance, (ii) Borrowers shall not have the right to select a two-month or a
three-month LIBOR Rate prior to June 1, 1997, unless shall otherwise agree to
the contrary by Initial Lenders in their sole and absolute discretion, and (iii)
each LIBOR Rate from time to time so selected by Borrowers shall take effect and
shall end on a ReSet Date. Except as hereinafter specifically provided to the
contrary in this paragraph, Borrowers shall not have the right to select more
than one LIBOR Rate to take effect on any given Re-Set Date. If Borrowers shall
not select a LIBOR Rate by written notice given to Agent at least three (3)
Business Days prior to a particular Re-Set Date, the LIBOR Rate for such Re-Set
Date shall be a one-month LIBOR Rate. The LIBOR Rate selected by Borrowers or
otherwise designated for a particular Re-Set Date in accordance with the
foregoing provisions of this paragraph, shall be in effect from and including
the first day of the Interest Period to which such LIBOR Rate pertains to, but
not


                                       B-3
<PAGE>   79
including, the Roll Over Date applicable to such Interest Period, and shall
(subject to the following provisions of this paragraph) be applicable to the
entire portion of the Principal Balance with respect to which a LIBOR Rate or
Rates are due to be re-set on such Re-Set Date, as well as to any portion of the
Principal Balance bearing interest at a Floating Rate and any advance of the
Credit Facility scheduled to be made on such Re-Set Date. Notwithstanding the
foregoing provisions of this paragraph, any advance or advances of the Credit
Facility which are drawn down and which in the aggregate are less than
$2,000,000, or which are drawn down other than on a Re-Set Date in accordance
with the provisions of paragraph 5 of this Exhibit, will bear interest at the
Floating Rate from and including the date upon which the same are drawn down to,
but not including, the earlier to occur of (i) the first Re-Set Date which is
five (5) Business Days or more after the date of such draw and on which a LIBOR
Rate applicable to the outstanding Principal Balance is due to be reset, or (ii)
the first Re-Set Date which is five (5) Business Days or more after the date of
such draw and on which the aggregate portion of the Principal Balance bearing
interest at the Floating Rate is equal to or is in excess of $2,000,000,
whereupon the interest rate applicable to such advance or advances or such
portion of the Principal Balance bearing interest at the Floating Rate will be
converted to a LIBOR Rate in accordance with the provisions of this paragraph.
From and after the date upon which the Principal Balance is equal to or in
excess of $4,000,000, and for so long as the Principal Balance is equal to or in
excess of $4,000,000, Borrowers shall have the right to select up to, but not in
excess of, two LIBOR Rates to take effect on any given Re-Set Date by written
notice given to Agent at least five (5) Business Days prior to the applicable
Re-Set Date in which Borrowers shall specify the two LIBOR Rates so selected by
Borrowers and the respective portions of the Principal Balance (inclusive of any
advance of the Credit Facility scheduled to be made on such Re-Set Date) to
which such LIBOR Rates are to respectively pertain, it being agreed that (i) the
minimum portion of the Principal Balance to which any such LIBOR Rate may
pertain shall be equal to at least $2,000,000, and (ii) each such LIBOR Rate so
selected by Borrowers shall be applicable to the portion of the Principal
Balance to which it pertains from and including the first day of the applicable
Interest Period to, but not including, the Roll Over Date applicable to such
Interest Period. If the Maturity Date is not a Re-Set Date, the entire Principal
Balance shall at the election of Co-Lenders either bear interest at the Floating
Rate or at a one month LIBOR Rate determined in accordance with the provisions
of paragraph 1(iv) and paragraph 6 of this Exhibit from and including the last
Re-Set Date prior to the Maturity Date to, but not including, the Maturity Date,
it being agreed that any such one-month LIBOR Rate shall be determined on the
basis of an assumed Interest Period of one month.

            5. Notwithstanding anything to the contrary contained in this
Agreement or the other Credit Facility Documents, Borrowers shall not have the
right (other than as provided in the next sentence) to obtain more than one
advance per month under the Credit Facility. Notwithstanding the foregoing,
Borrowers shall have the right to obtain more than one advance under the Credit
Facility per month if such additional advance is being made pursuant to this
Agreement in connection with the acquisition of an Additional Property in
accordance with the provisions of this Agreement. Any such advance which is not
made on a Re-Set Date shall bear interest at the Floating Rate until the next
occurring Re-Set Date, unless such next occurring Re-Set Date is less than five
(5) Business Days from the date of such advance in which event such advance
shall bear interest at the Floating Rate until the second Re-Set Date following
the date of such advance, at which time the interest rate applicable to such
advance shall, except as otherwise provided to the contrary in this Exhibit, be
converted to a LIBOR Rate.

            6. Agent shall, as soon as practicable after 9:30 a.m., Charlotte,
North Carolina time, two (2) Business Days prior to the commencement of a
particular Interest Period, determine the LIBOR Rate which


                                       B-4
<PAGE>   80
will be in effect during such Interest Period and inform Borrowers of the LIBOR
Rate so determined (which determination shall be conclusive and binding upon
Borrowers absent manifest error). In the event, and on each occasion, that on
the day two (2) Business Days prior to the commencement of a particular Interest
Period, Agent shall have determined in good faith (which determination shall be
conclusive and binding upon Borrowers) that U.S. dollar deposits in an amount
approximately equal to the portion of the Principal Balance which is to bear
interest at a particular LIBOR Rate during such particular Interest Period in
accordance with the provisions of this Exhibit are not generally available at
such time in the London Interbank Market, or reasonable means do not exist for
ascertaining a LIBOR Rate for such particular Interest Period, Agent shall so
notify Borrowers and the interest rate applicable to the portion of the
Principal Balance with respect to which such LIBOR Rate was to pertain shall
automatically be converted to the Floating Rate as of the next occurring Re-Set
Date, it being agreed that the Floating Rate shall remain in effect thereafter
with respect to such portion of the Principal Balance unless and until Agent
shall have determined in good faith (which determination shall be conclusive and
binding upon Borrowers) that the aforesaid circumstances no longer exist,
whereupon the interest rate applicable to such portion of the Principal Balance
shall be converted back to a LIBOR Rate determined in the manner hereinabove set
forth in this Exhibit effective as of the first Re-Set Date which occurs ten
(10) Business Days or more after such good faith determination by Agent. If any
change in any law or regulation or in the interpretation thereof by any
governmental authority charged with the administration or interpretation thereof
shall make it unlawful for any one or more of Co-Lenders to make or maintain
LIBOR Rates with respect to the Principal Balance or any portion thereof or to
fund the Principal Balance or any portion thereof at LIBOR Rates in the London
Interbank Market or to give effect to their respective obligations as
contemplated by this Exhibit, then, upon notice by Agent to Borrowers, the
interest rate applicable to the entire Principal Balance shall be automatically
converted to the Floating Rate, it being agreed that any notice given by Agent
to Borrowers pursuant to this sentence shall, if lawful, be effective insofar as
it pertains to any particular portion of the Principal Balance bearing interest
at a particular LIBOR Rate on the last day of the then existing Interest Period
pertaining to such particular portion of the Principal Balance, or if not
lawful, shall be effective immediately upon being given by Agent to Borrowers,
and that the Floating Rate shall remain in effect thereafter with respect to
such particular portion of the Principal Balance unless and until Agent shall
have determined in good faith (which determination shall be conclusive and
binding upon Borrowers) that the aforesaid circumstances no longer exist,
whereupon the interest rate applicable to such portion of the Principal Balance
shall be converted to a LIBOR Rate determined in the manner hereinabove set
forth in this Exhibit effective as of the first Re-Set Date which occurs ten
(10) Business Days or more after such good faith determination by Agent. If the
interest rate applicable to any particular portion of the Principal Balance is
converted from a LIBOR Rate to the Floating Rate on a date other than a Roll
Over Date in accordance with the provisions of the preceding sentence, Borrowers
shall pay to Agent on demand an amount equal to the prepayment premium, if any,
which would have been due pursuant to the provisions of this Exhibit hereinafter
set forth if the portion of the Principal Balance bearing interest at such LIBOR
Rate was prepaid in full on the date of such conversion.

            7. Borrowers recognize that the cost to Co-Lenders of making or
maintaining LIBOR Rates with respect to the Principal Balance or any portion
thereof may fluctuate and Borrowers agree to pay Agent within ten (10) days
after demand by Agent an additional amount or amounts as Agent shall reasonably
determine will compensate Co-Lenders for actual costs incurred by Co-Lenders in
maintaining LIBOR Rates on the Principal Balance or any portion thereof as a
result of:


                                       B-5
<PAGE>   81
      (i) the imposition after the date of this Agreement of, or changes after
the date of this Agreement in, or the actual maintenance after the date of this
Agreement by any Co-Lender of, reserves in accordance with the reserve
requirements now or hereafter promulgated by the Board of Governors of the
Federal Reserve System of the United States, including, but not limited to, any
reserve on Eurocurrency Liabilities as defined in Regulation D of the Board of
Governors of the Federal Reserve System of the United States at the ratios
provided in such Regulation from time to time, it being agreed that the portion
of the Principal Balance bearing interest at LIBOR Rates from time to time in
accordance with the provisions of this Exhibit shall be deemed to constitute
Eurocurrency Liabilities, as defined by such Regulation; or

     (ii) any change, after the date of this Agreement, in applicable law, rule
or regulation or in the interpretation or administration thereof by any domestic
or foreign governmental authority charged with the interpretation or
administration thereof (whether or not having the force of law) or by any
domestic or foreign court changing the basis of taxation of payments to any
Co-Lender of the Principal Balance or interest on the Principal Balance or any
portion thereof at a LIBOR Rate or any other fees or amounts payable in respect
of the Credit Facility pursuant to the provisions of the Credit Facility
Documents (other than taxes imposed on all or any portion of the overall net
income of any such Co-Lender by the Federal government or by the state or
country of incorporation or domicile of any such Co-Lender or by any political
subdivision or taxing authority of the Federal government or any such state or
country), or imposing, modifying or applying any reserve, special deposit or
similar requirement against assets of, deposits with or for the account of,
credit extended by, or any other acquisition of funds for loans by any such
Co-Lender or imposing on any such Co-Lender or on the London Interbank Market
any other condition affecting the Credit Facility, the Credit Facility Documents
or the portion of the Principal Balance bearing interest at LIBOR Rates so as to
increase the cost to any such Co-Lender of making or maintaining LIBOR Rates
with respect to the Principal Balance or any portion thereof or to reduce the
amount of any sum received or receivable by any such Co-Lender with respect to
the Credit Facility pursuant to the provisions of the Credit Facility Documents
(whether of principal, interest or otherwise), by an amount deemed by Agent in
good faith to be material, but without duplication for payments required under
subparagraph (i) above.

            Any amount or amounts payable by Borrowers to Co-Lenders pursuant to
subparagraph (i) or (ii) above shall be paid by Borrowers to Co-Lenders within
ten (10) days of receipt by Borrowers from Agent of a statement setting forth
the amount or amounts due and the basis for the determination from time to time
of such amount or amounts, which statement shall be conclusive and binding upon
Borrowers absent manifest error. Failure on the part of Co-Lenders to demand
compensation for any increased costs in any Interest Period shall not constitute
a waiver of Co-Lenders' right to demand compensation for any increased costs
incurred during any such Interest Period or in any other subsequent or prior
Interest Period. Failure on the part of Co-Lenders to demand compensation for
any increased costs in any Interest Period shall not constitute a waiver of
Agent's right to demand compensation for any increased costs incurred during any
such Interest Period or in any other subsequent or prior Interest Period,
provided, however, that if Agent shall fail to notify Borrowers of the
occurrence of any event described in subparagraph (i) or (ii) above within one
hundred eighty (180) days after the occurrence of such event, Borrowers'
liability for any increased costs incurred by any such Co-Lender, as the result
of the occurrence of such event shall be limited to increased costs attributable
to the period occurring subsequent to the date upon which Co-Lenders shall
actually notify Borrowers of the occurrence of such event.


                                       B-6
<PAGE>   82
            8. Borrowers shall indemnify each Co-Lender against any loss or
expense that any such Co-Lender may sustain or incur as a consequence of any
failure by Borrowers to take down all or any portion of any advance of the
Credit Facility (including, without limitation, the initial advance of the
Credit Facility) on the date Borrowers requested that such advance be made in
accordance with the provisions of this Agreement or as a consequence of any
default by Borrowers in the payment of any portion of the Principal Balance
bearing interest at a LIBOR Rate, or any part thereof or interest accrued
thereon at a LIBOR Rate, as and when due and payable, or the occurrence of any
Event of Default including, but not limited to, any loss or expense sustained or
incurred by any such Co-Lender in liquidating or reemploying deposits from third
parties acquired to effect or maintain a LIBOR Rate with respect to all or any
portion of the Principal Balance or any advance of the Credit Facility requested
or scheduled to be made pursuant to the provisions of this Agreement. Co-Lenders
shall provide to Borrowers a statement explaining the amount of any such loss or
expense, which statement shall be conclusive and binding upon Borrowers absent
manifest error.

            9. If after the date of this Agreement, Agent shall have determined
that the adoption after the date of this Agreement of any law, rule, regulation
or guideline regarding capital adequacy, or any change therein, or any change in
any of the foregoing or in the interpretation or administration of any of the
foregoing by any domestic or foreign governmental authority, central bank or
comparable agency charged with the interpretation or administration thereof, or
compliance by any Co-Lender (or any lending office of any Co-Lender) or by any
Co-Lender's holding company, as the case may be, with any request or directive
regarding capital adequacy (whether or not having the force of law) of any such
authority, central bank or comparable agency, has or would have the effect of
reducing the rate of return on any Co-Lender's capital or on the capital of any
Co-Lender's holding company, as the case may be, as a consequence of any
Co-Lender's obligations with respect to the Credit Facility under the terms of
the Credit Facility Documents to a level below that which any such Co-Lender or
any such Co-Lender's holding company, as the case may be, could have achieved
but for such adoption, change or compliance (taking into consideration any such
Co-Lender's or any such Co-Lender's holding company's policies, as the case may
be, with respect to capital adequacy) by an amount deemed by Agent to be
material, then from time to time, Borrowers shall pay to Agent such additional
amount or amounts as will compensate any such Co-Lender or any such Co-Lender's
holding company, as the case may be, for such reduction. Any amount or amounts
payable by Borrowers to Co-Lenders in accordance with the provisions of this
paragraph shall be paid by Borrowers to Agent within ten (10) days of receipt by
Borrowers from Agent of a statement setting forth the amount or amounts due and
the basis for the determination from time to time of such amount or amounts,
which statement shall be conclusive and binding upon Borrowers absent manifest
error.

            10. Subject to the following provisions of this paragraph, Borrowers
shall have the right to prepay the Principal Balance in whole, or in part, upon
not less than five (5) Business Days' prior written irrevocable notice to Agent
specifying the intended date of prepayment, which date of prepayment shall not
be more than fifteen (15) days after the date of such notice, and the amount to
be prepaid and upon payment of all interest and other sums then due and payable
pursuant to the provisions of the Credit Facility Documents. The portion of the
Principal Balance specified in any such irrevocable notice of prepayment shall,
notwithstanding anything to the contrary contained in the Credit Facility
Documents, be absolutely and unconditionally due and payable on the date
specified in such notice. No prepayment premium shall be payable if the portion
of the Principal Balance being prepaid is bearing interest on the date of
prepayment at the Floating Rate in accordance with the provisions of paragraph
11 of this Exhibit or otherwise in accordance with the provisions of this
Exhibit, or if such


                                       B-7
<PAGE>   83
prepayment occurs on the Roll Over Date pertaining to the portion of the
Principal Balance being prepaid. If any particular portion of the Principal
Balance being prepaid is bearing interest at a particular LIBOR Rate and such
prepayment does not occur on the Roll Over Date pertaining to the portion of the
Principal Balance being prepaid, Borrowers shall pay to Agent contemporaneously
with such prepayment a prepayment premium equal to the portion of the Principal
Balance being prepaid, multiplied by a per annum interest rate equal to the
difference between the Base LIBOR Rate applicable to the portion of the
Principal Balance being prepaid and the 360-day equivalent interest yield, as
adjusted to reflect interest payments on a monthly basis (hereinafter called the
"Reinvestment Rate"), on any U.S. Government Treasury Obligations selected by
Agent, in its sole and absolute discretion, in an aggregate amount comparable to
the portion of the Principal Balance being prepaid, and with maturities
comparable to the Roll Over Date applicable to the portion of the Principal
Balance being prepaid, calculated over a period of time from and including the
date of prepayment to, but not including, the Roll Over Date applicable to the
portion of the Principal balance being prepaid. If the Base LIBOR Rate
applicable to the portion of the Principal Balance being prepaid is equal to or
less than the Reinvestment Rate no prepayment premium shall be due. No
prepayment premium payable under this paragraph shall in any event or under any
circumstance be deemed or construed to be a penalty. If a portion of the
Principal Balance is bearing interest at a LIBOR Rate or Rates and a portion of
the Principal Balance is bearing interest at the Floating Rate in accordance
with the provisions of this Exhibit on the date of a partial prepayment of the
Principal Balance in accordance with the provisions of this paragraph, such
partial prepayment shall be applied to the respective portions of the Principal
Balance bearing interest at such LIBOR Rate or Rates and the Floating Rate in
such order and manner so as to minimize the prepayment premium due with respect
thereto as calculated pursuant to the provisions of this paragraph. Any payment
of the Principal Balance after the Debt shall have been declared to be
immediately due and payable in accordance with the provisions of the Credit
Facility Documents, or after a foreclosure of one or more of the Mortgages has
commenced as a result of the occurrence of an Event of Default, shall, to the
extent permitted by law, be deemed to be a voluntary prepayment for all purposes
of this paragraph and a prepayment premium calculated pursuant to the provisions
of this paragraph shall be payable with respect thereto based upon the Base
LIBOR Rate or Rates applicable to the Principal Balance immediately prior to
such default, declaration or commencement. Agent shall deliver to Borrowers a
statement setting forth the amount and basis of determination of the prepayment
premium, if any, due in connection with a prepayment of the Principal Balance in
accordance with the provisions of this paragraph, it being agreed that (a) the
calculation of such prepayment premium may be based on any U.S. Government
Treasury Obligations selected by Agent, in its sole and absolute discretion, (b)
Co-Lenders shall not be obligated or required to have actually reinvested the
prepaid portion of the Principal Balance in any such U.S. Government Treasury
Obligations as a condition precedent to Borrowers being obligated to pay a
prepayment premium calculated in accordance with the provisions of this
paragraph, and (c) Borrowers shall not have the right to question the
correctness of any such statement or the method of calculation set forth therein
in the absence of manifest error. Borrowers shall, upon receipt of such
statement and contemporaneously with any such prepayment of the Principal
Balance, remit to Agent the prepayment premium, if any, due in connection
therewith, as calculated pursuant to the provisions of this paragraph.
Co-Lenders shall not be obligated to accept any prepayment of the Principal
Balance unless it is accompanied by the prepayment premium, if any, due in
connection therewith as calculated pursuant to the provisions of this paragraph.
Any partial prepayment of the Principal Balance in accordance with the
provisions of this paragraph shall be in a minimum amount of at least $1,000,000
and shall be in even multiples of $100,000. The provisions of this paragraph
shall be applicable to any prepayment of the Principal Balance in whole or in
part, it being agreed that any payment of the Principal Balance,


                                       B-8
<PAGE>   84
in whole or in part, (i) in connection with sale of any Property in accordance
with the provisions of paragraph 16 of this Agreement, (ii) to maintain
compliance with the Loan to Value Requirement, the Minimum Debt Service Coverage
Ratio, the Supplemental Debt Service Coverage Ratio, the Fixed Charge Coverage
Ratio or the Debt-to-Tangible Net Worth Requirement, (iii) in connection with
any mandatory pay down of the Principal Balance pursuant to paragraph 17 of this
Agreement, or (iv) otherwise pursuant to or as required by the provisions of the
Credit Facility Documents, shall be deemed to be a voluntary prepayment for the
purposes of this paragraph and a prepayment premium calculated pursuant to the
provisions of this paragraph shall be payable with respect thereto.

            11. Borrowers shall have the option upon not less than fifteen (15)
Business Days' prior written notice to Agent given simultaneously and in
conjunction with an irrevocable notice of prepayment given by Borrowers to Payee
pursuant to paragraph 10 of this Exhibit, and provided that such prepayment is
being made in connection with an anticipated sale of a Property pursuant to
paragraph 16 of this Agreement or constitutes a mandatory prepayment of the
Principal Balance pursuant to paragraph 17 of this Agreement, to convert the
interest rate on the portion of the Principal Balance which is to be prepaid, as
set forth in such notice of prepayment, to a Floating Rate effective as of the
Re-Set Date occurring immediately prior to the designated date of prepayment, as
set forth in such notice of prepayment, it being agreed that (i) such Re-Set
Date must be ten (10) Business Days or more after the date of receipt by Agent
from Borrowers of Borrowers's election to exercise such option pursuant to this
paragraph, and (ii) the interest rate applicable to a particular portion of the
Principal Balance may be converted from a particular LIBOR Rate to the Floating
Rate, as of such Re-Set Date, only if such Re-Set Date constitutes the Roll Over
Date pertaining to such LIBOR Rate and such portion of the Principal Balance. If
Borrowers exercises the aforesaid option, the interest rate on the portion of
the Principal Balance with respect to which Borrowers has exercised such option
will automatically convert to and be calculated at the Floating Rate from and
including the Re-Set Date occurring immediately prior to the specified date of
prepayment, as set forth in Borrowers's notice of prepayment, to, but not
including, the earlier to occur of (i) the date upon which such portion of the
Principal Balance is paid in full, or (ii) the first Re-Set Date occurring five
(5) Business Days or more after the designated date of prepayment whereupon the
interest rate on such portion of the Principal Balance (or so much thereof as
may still be outstanding) shall (subject to the provisions of this Exhibit)
thereafter be calculated at a LIBOR Rate determined in accordance with the
provisions of this Exhibit. Nothing contained in the preceding sentence shall be
deemed to qualify, modify or affect in any manner whatsoever the provisions of
paragraph 10 of this Exhibit which provide that the portion of the Principal
Balance specified in any notice of prepayment given by Borrowers to Payee
pursuant to paragraph 10 of this Exhibit shall be absolutely and unconditionally
due and payable on the date designated for such prepayment in such notice.

            12. All sums which may or shall become due and payable by Borrowers
in accordance with the provisions of paragraph 7, 8, 9 or 10 of this Exhibit
shall be evidenced by the Credit Facility Notes, shall be secured by the
Mortgages and shall constitute part of the Debt.


                                       B-9
<PAGE>   85
                                    Exhibit C





                                      NOTE
                           (Revolving Credit Facility)


$______________                                               New York, New York
                                                         As of November 25, 1996


               FOR VALUE RECEIVED, BRANDYWINE REALTY TRUST, a Maryland real
estate investment trust, BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware
limited partnership, LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a Pennsylvania limited
partnership; NICHOLS LANSDALE LIMITED PARTNERSHIP III, a Pennsylvania limited
partnership; NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania limited partnership;
C/N OAKLANDS LIMITED PARTNERSHIP I, a Pennsylvania limited partnership; FIFTEEN
HORSHAM, L.P., a Pennsylvania limited partnership; C/N LEEDOM LIMITED
PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN LIMITED
PARTNERSHIP III, a Pennsylvania limited partnership; each having an office at
Newtown Square Corporate Campus, 16 Campus Boulevard, Suite 150, Newtown Square,
Pennsylvania (hereinafter collectively referred to as "Maker"), promise to pay
__________________________________, a ____________________ having an office at
____________________, ________, ________ (hereinafter referred to as "Payee") or
order, at such place as may be designated from time to time in writing by Payee,
the principal sum of ________________________________ and 00/100 Dollars
($______________) in lawful money of the United States of America, or so much
thereof as may be advanced and readvanced by Payee to Maker and be outstanding
from time to time in accordance with the provisions of the Credit Agreement,
with interest thereon from and including the date of this Note to, but not
including, the date this Note is paid in full, calculated in the manner
hereinafter set forth, as follows:

               (i) interest on the Principal Balance calculated in the manner
         set forth in the Credit Agreement shall be due and payable in Federal
         funds or other immediately available funds on each Re-Set Date during
         the term of this Note and otherwise in accordance with the provisions
         of the Credit Agreement; and

               (ii) the entire Principal Balance, together with all interest
         accrued and unpaid thereon calculated in the manner set forth in the
         Credit Agreement and all other sums due under this Note, shall be due
         and payable on the Maturity Date and otherwise in accordance with the
         provisions of the Credit Agreement.

               1. The term "Credit Agreement" as used in this Note means a
certain Revolving Credit Agreement dated as of the date hereof entered into
among Smith Barney Mortgage Capital Group, Inc., NationsBank, N.A., in its
individual capacity, Maker and NationsBank, N.A., acting in its capacity as
administrative and documentation agent for the Credit Facility, and pursuant to
the provisions of which the Credit Facility is being extended by Co-Lenders to
Maker. This Note constitutes one of the Credit Facility Notes which have been
executed and delivered by Maker to Co-Lender in accordance with the Credit
Agreement and which together evidence the Credit Facility. All other capitalized
terms used in this Note shall, unless otherwise defined in this Note, have the
meaning given to such term in the Credit Agreement.
<PAGE>   86
               2. It is hereby expressly agreed that the entire Debt shall
become immediately due and payable at the option of Co-Lenders on the happening
of any Event of Default.

               3. All of the terms, covenants and provisions contained in the
Credit Agreement and the other Credit Facility Documents which are to be kept
and performed by Maker are hereby made part of this Note to the same extent and
with the same force and effect as if they were fully set forth herein. Maker
agrees to perform and comply with each of the terms, covenants and provisions
contained in this Note, the Credit Agreement and the other Credit Facility
Documents on the part of Maker to be observed and performed.

               4. If any installment of interest payable under this Note is not
paid when due, Maker shall pay to Administrative Agent upon demand an amount
equal to four percent (4%) of such unpaid installment as a late payment charge.

               5. In addition to any late payment charge which may be due under
this Note, if the Debt is declared immediately due and payable pursuant to the
provisions of the Credit Facility Documents, or if the Debt is not paid in full
on the Maturity Date, Maker shall thereafter pay interest on the then entire
outstanding Principal Balance from the date of such declaration or the Maturity
Date, as the case may be, until the date the Principal Balance is paid in full,
at the Default Rate. In addition, if an Event of Default shall occur, the
Principal Balance shall, from and including the date upon which such Event of
Default has occurred and for so long as such Event of Default continues and
without further act or instrument and without the necessity of any further or
prior notice by Payee or Agent to Maker, bear interest at the Default Rate
irrespective of whether the Debt shall have been declared to be immediately due
and payable as the result of the occurrence of such Event of Default.

               6. Maker hereby waives presentment and demand for payment, notice
of dishonor, protest and notice of protest of this Note. If any payment under
this Note is not made when due, Maker agrees to pay all costs of collection when
incurred, including reasonable attorneys' fees (which costs shall be added to
the amount due under this Note and shall be receivable therewith). No release of
any security for the payment of this Note or extension of time for payment of
this Note, or any installment hereof, and no alteration, amendment or waiver of
any provision of this Note or any of the other Credit Facility Documents made by
agreement between or among Co-Lenders, Agent and/or Payee and any other person
or party shall release, discharge, modify, change or affect the liability of
Maker under this Note or any of the other Credit Facility Documents.

               7. This Note is subject to the express condition that at no time
shall Maker be obligated or required to pay interest on the Principal Balance at
a rate which could subject Payee to either civil or criminal liability as a
result of being in excess of the maximum rate which Maker is permitted by law to
contract or agree to pay. If by the terms of this Note Maker is at any time
required or obligated to pay interest on the Principal Balance at a rate in
excess of such maximum rate, the rate of interest under this Note shall be
deemed to be immediately reduced to such maximum rate and interest payable
hereunder shall be computed at such maximum rate and the portion of all prior
interest payments in excess of such maximum rate shall be applied and shall be
deemed to have been payments in reduction of the Principal Balance.

               8. If Maker consists of more than one person or party, the
obligations and liabilities of each such person or party hereunder shall be
joint and several.


                                      -2-
<PAGE>   87
               9. Except as otherwise specifically provided to the contrary in
the Credit Facility Documents, this Note is secured on a pari passu basis with
the other Credit Facility Notes by the Mortgages and the other Credit Facility
Documents.

               10. The terms of this Note shall be governed by and construed
under the laws of the State of New York.

               11. This Note may only be modified, amended, changed or
terminated by an agreement in writing signed by Payee, Agent and Maker. No
waiver of any term, covenant or provision of this Note shall be effective unless
given in writing by Payee and Agent and if so given by Payee and Agent shall
only be effective in the specific instance in which given.

               12. Maker acknowledges that this Note and Maker's obligations
under this Note are and shall at all times continue to be absolute and
unconditional in all respects, and shall at all times be valid and enforceable
irrespective of any other agreements or circumstances of any nature whatsoever
which might otherwise constitute a defense (other than a defense of payment) to
this Note and the obligations of Maker under this Note or the obligations of any
other person or party relating to this Note or the obligations of Maker
hereunder or otherwise with respect to the Credit Facility. Maker absolutely,
unconditionally and irrevocably waives any and all right to assert any defense,
setoff, counterclaim (other than a compulsory counterclaim in a court of
competent jurisdiction) or crossclaim of any nature whatsoever with respect to
this Note or the obligations of Maker under this Note or the obligations of any
other person or party relating to this Note or the obligations of Maker
hereunder or otherwise with respect to the Credit Facility in any action, case
or proceeding brought by Payee or Agent to collect the Debt, or any portion
thereof, or to enforce, foreclose and realize upon the liens and security
interests created by the Mortgages and the other Credit Facility Documents
(provided, however, that the foregoing provisions of this sentence shall not be
deemed a waiver of the right of Maker to assert any compulsory counterclaim in
any such action, case or proceeding brought by Payee or Agent in any state court
if such counterclaim is compelled under local law or rule or procedure, or in
any such action, case or proceeding brought by Payee or Agent in a court of the
United States, nor shall the foregoing provisions of this sentence be deemed a
waiver of the right of Maker to assert any claim which would otherwise
constitute a defense, setoff, counterclaim or crossclaim of any nature
whatsoever against Payee or Agent in any separate action, case or proceeding
brought by Maker against Payee or Agent). MAKER ACKNOWLEDGES THAT NO ORAL OR
OTHER AGREEMENTS, UNDERSTANDINGS, REPRESENTATIONS OR WARRANTIES EXIST WITH
RESPECT TO THIS NOTE OR WITH RESPECT TO THE OBLIGATIONS OF MAKER UNDER THIS
NOTE, EXCEPT THOSE SPECIFICALLY SET FORTH IN THIS NOTE AND THE OTHER CREDIT
FACILITY DOCUMENTS, AND THAT THIS NOTE AND THE OTHER CREDIT FACILITY DOCUMENTS
SETS FORTH THE ENTIRE AGREEMENT AND UNDERSTANDING OF PAYEE, AGENT, CO-LENDERS
AND MAKER.

               13. No delay on the part of Payee, Agent or Co-Lenders in
exercising any right or remedy under this Note or the other Credit Facility
Documents or failure to exercise the same shall operate as a waiver in whole or
in part of any such right or remedy. No notice to or demand on Maker shall be
deemed to be a waiver of the obligation of Maker or of the right of Payee, Agent
or Co-Lender to take further action without further notice or demand as provided
in this Note and the other Credit Facility Documents.

               14. Maker agrees to submit to personal jurisdiction in the State
of New York in any action, case or proceeding arising out of this Note and, in
furtherance of such agreement, Maker hereby agrees and consents that without
limiting other methods of obtaining jurisdiction, personal jurisdiction over
Maker in any such action, case or proceeding may be obtained within or without
the jurisdiction of any court located in New York and that any process or


                                      -3-
<PAGE>   88
notice of motion or other application to any such court in connection with any
such action, case or proceeding may be served upon Maker by registered or
certified mail to or by personal service at the last known address of Maker,
whether such address be within or without the jurisdiction of any such court.
Maker also agrees that the venue of any litigation arising in connection with
the Debt or in respect of any of the obligations of Maker under this Note shall,
to the extent permitted by law, be in New York County.

               15. Maker (and the undersigned representative of Maker, if any)
represents that Maker has full power, authority and legal right to execute and
deliver this Note and that this Note constitutes a valid and binding obligation
of Maker.

               16. MAKER HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, AND
PAYEE BY ITS ACCEPTANCE OF THIS NOTE IRREVOCABLY AND UNCONDITIONALLY WAIVES, ANY
AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, CASE, PROCEEDING, SUIT OR
COUNTERCLAIM ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE RELATING TO THE
CREDIT FACILITY, THIS NOTE, OR THE OTHER CREDIT FACILITY DOCUMENTS.

               17. Whenever used, the singular number shall include the plural,
the plural the singular, and the words "Payee", "Agent", "Co-Lenders", and
"Maker" shall include their respective successors and assigns, provided,
however, that Maker shall in no event or under any circumstance have the right
without obtaining the prior written consent of Co-Lenders to assign or transfer
its obligations under this Note or the other Credit Facility Documents, in whole
or in part, to any other person, party or entity.

               18. No recourse shall be had for any obligation of BRT under this
Note or any of the other Credit Facility Documents or for any claim based
thereon or otherwise in respect thereof, against any past, present or future
trustee, shareholder, officer or employee of BRT, whether by virtue of any
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, all such liability being expressly waived and released by Payee and
each other party to this Note and the other Credit Facility Documents.

               IN WITNESS WHEREOF, Maker has duly executed this Note the day and
year first above written.


                                  BRANDYWINE REALTY TRUST

                                  By:    ______________________________
                                         Name:   Gerard H. Sweeney
                                         Title:  President and Chief
                                                 Executive Officer

                                  BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                  By:    Brandywine Realty Trust, a Maryland
                                         real estate investment trust, its
                                         general partner

                                         By:___________________________
                                            Name:   Gerard H. Sweeney
                                            Title:  President and Chief
                                                    Executive Officer


                                      -4-
<PAGE>   89
                            LC/N HORSHAM LIMITED PARTNERSHIP, a
                            Pennsylvania limited partnership

                            By:    Witmer Operating Partnership I,
                                   L.P., a Delaware limited
                                   partnership, its general partner

                                   By:    Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                         By:___________________________
                                             Name:  Gerard H. Sweeney
                                             Title: President and Chief
                                                    Executive Officer

                            LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a
                            Pennsylvania limited partnership

                            By:    Witmer Operating Partnership I,
                                   L.P., a Delaware limited
                                   partnership, its general partner

                                   By:    Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                         By:___________________________
                                             Name:  Gerard H. Sweeney
                                             Title: President and Chief
                                                    Executive Officer

                            NICHOLS LANSDALE LIMITED PARTNERSHIP III,
                            a Pennsylvania limited partnership

                            By:    Witmer Operating Partnership I,
                                   L.P., a Delaware limited
                                   partnership, its general partner

                                   By:    Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                         By:___________________________
                                             Name:  Gerard H. Sweeney
                                             Title: President and Chief
                                                    Executive Officer


                                      -5-
<PAGE>   90
                                NEWTECH III LIMITED PARTNERSHIP, a
                                Pennsylvania limited partnership

                                By:    Witmer Operating Partnership I,
                                       L.P., a Delaware limited
                                       partnership, its general partner

                                       By:    Brandywine Holdings I, Inc., a
                                              Pennsylvania corporation, its
                                              general partner

                                             By:___________________________
                                                 Name:   Gerard H. Sweeney
                                                 Title:  President and Chief
                                                         Executive Officer

                                NEWTECH IV LIMITED PARTNERSHIP, a
                                Pennsylvania limited partnership

                                By:    Witmer Operating Partnership I,
                                       L.P., a Delaware limited
                                       partnership, its general partner

                                       By:    Brandywine Holdings I, Inc., a
                                              Pennsylvania corporation, its
                                              general partner

                                             By:___________________________
                                                 Name:   Gerard H. Sweeney
                                                 Title:  President and Chief
                                                         Executive Officer

                                C/N OAKLANDS LIMITED PARTNERSHIP I, a
                                Pennsylvania limited partnership

                                By:    Witmer Operating Partnership I,
                                       L.P., a Delaware limited
                                       partnership, its general partner

                                       By:    Brandywine Holdings I, Inc., a
                                              Pennsylvania corporation, its
                                              general partner

                                             By:___________________________
                                                 Name:   Gerard H. Sweeney
                                                 Title:  President and Chief
                                                         Executive Officer


                                      -6-
<PAGE>   91
                               FIFTEEN HORSHAM, L.P., a Pennsylvania
                               limited partnership

                               By:    Witmer Operating Partnership I,
                                      L.P., a Delaware limited
                                      partnership, its general partner

                                      By:    Brandywine Holdings I, Inc., a
                                             Pennsylvania corporation, its
                                             general partner

                                            By:___________________________
                                                Name:   Gerard H. Sweeney
                                                Title:  President and Chief
                                                        Executive Officer

                               C/N LEEDOM LIMITED PARTNERSHIP II, a
                               Pennsylvania limited partnership

                               By:    Brandywine Operating Partnership,
                                      L.P., a Delaware limited
                                      partnership, its general partner

                                      By:    Brandywine Realty Trust, a
                                             Maryland real estate
                                             investment trust, its general
                                             partner

                                             By:___________________________
                                                Name:   Gerard H. Sweeney
                                                Title:  President and Chief
                                                        Executive Officer

                               C/N IRON RUN LIMITED PARTNERSHIP III, a
                               Pennsylvania limited partnership

                               By:    Brandywine Operating Partnership,
                                      L.P., a Delaware limited
                                      partnership, its general partner

                                      By:    Brandywine Realty Trust, a
                                             Maryland real estate
                                             investment trust, its general
                                             partner

                                             By:___________________________
                                                Name:   Gerard H. Sweeney
                                                Title:  President and Chief
                                                        Executive Officer


                                        -7-
<PAGE>   92
                                    EXHIBIT D

              (Form of Request for Advance under Credit Facility)*


                                    (No. __)

                  Reference is hereby made to a certain Revolving Credit
Agreement (the "Credit Agreement") dated as of _________________, 1996, entered
into among SMITH BARNEY MORTGAGE CAPITAL GROUP, INC.; NATIONSBANK, N.A.; acting
in its individual capacity; BRANDYWINE REALTY TRUST; BRANDYWINE OPERATING
PARTNERSHIP, L.P.; LC/N HORSHAM LIMITED PARTNERSHIP; LC/N KEITH VALLEY LIMITED
PARTNERSHIP I; NICHOLS LANSDALE LIMITED PARTNERSHIP III; NEWTECH III LIMITED
PARTNERSHIP; NEWTECH IV LIMITED PARTNERSHIP; C/N OAKLANDS LIMITED PARTNERSHIP I;
FIFTEEN HORSHAM, L.P.; C/N LEEDOM LIMITED PARTNERSHIP II; C/N IRON RUN LIMITED
PARTNERSHIP III; LC/N HORSHAM LIMITED PARTNERSHIP; LC/N KEITH VALLEY LIMITED
PARTNERSHIP I; NICHOLS LANSDALE LIMITED PARTNERSHIP III; NEWTECH III LIMITED
PARTNERSHIP; NEWTECH IV LIMITED PARTNERSHIP; C/N OAKLANDS LIMITED PARTNERSHIP I;
FIFTEEN HORSHAM, L.P.; C/N LEEDOM LIMITED PARTNERSHIP II; C/N IRON RUN LIMITED
PARTNERSHIP III; and NATIONSBANK, N.A. acting in its capacity as administrative
and documentation agent.

                  Pursuant to the provisions of paragraphs 9 and 10 of the
Credit Agreement, BRT and BOP hereby certify to and request of Agent as follows:

1.             Borrowers are entitled to and hereby requests Agent to make an
               advance under the Credit Facility in the amount of $____________.

2.             The requested date of the advance is_________________________.

3.             The Interest Period applicable to the advance is______________.

4.             The proceeds of such advance are to be used for_______________,
               which is a permitted purpose under paragraph 8 of the Credit
               Agreement.

5.             This request for an advance is made pursuant to and in accordance
               with the provisions of the Credit Agreement.

6.             The principal amount outstanding under the Credit Facility on the
               date hereof, prior to any advance in response to this request, is
               $______________________.

7.             All of the affirmative and negative covenants and all of the
               representations and warranties contained in the Credit Agreement
               and the other Credit Facility Documents, and all of the other
               terms, covenants and conditions contained in the Credit Facility
               Documents (including, without limitation, those set forth in
               paragraphs 22 and 23 of the Credit Agreement) continue to be true
               and correct and continue to be complied with on the date hereof,
               and will continue to be true and correct and will continue to be
               complied with as of the date of, and subsequent to, the requested
               advance.

8.             No default or Event of Default has occurred or is continuing 
               under the Credit Facility Documents.

- --------
*       All terms used in this Request for Advance shall have the meanings given
        to such terms in the Credit Agreement.


                                       D-1
<PAGE>   93
9.             There has been no material adverse change in the financial
               condition of any Borrower or Guarantor since the date of the last
               financial statements delivered to Co-Lenders pursuant to the
               Credit Agreement.

10.            All of the other terms and conditions set forth in the Credit
               Agreement and the other Credit Facility Documents pertaining to
               advances of the Credit Facility have been satisfied.

11.            All items which Borrowers is required to furnish to Agent and
               Agent pursuant to the Credit Agreement accompany this request.

12.            The undersigned is an authorized signatory of BRT, individually
               and acting in its capacity as the sole general partner of BOP.

13.            No recourse shall be had for any obligation of BRT under this
               Request for Advance or under any of the other Credit Facility
               Documents or for any claim based thereon or otherwise in respect
               thereof, against any past, present or future trustee, 
               shareholder, officer or employee of BRT whether by virtue of any 
               statute or rule of law, or by the enforcement of any assessment 
               or penalty or otherwise, all such liability being expressly  
               waived and released by each party to this Request for Advance and
               to the other Credit Facility Documents.


Dated:___________________, 199_

                                BRANDYWINE REALTY TRUST, a Maryland real
                                estate trust

                                By:__________________________
                                   Name:   Gerard H. Sweeney
                                   Title:  President and Chief
                                           Executive Officer

                                BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                By:    Brandywine Realty Trust, a Maryland
                                       real estate trust, its general
                                       partner

                                       By:______________________
                                          Name:   Gerard H. Sweeney
                                          Title:  President and Chief
                                                  Executive Officer

                                LC/N HORSHAM LIMITED PARTNERSHIP, a
                                Pennsylvania limited partnership

                                By:    Witmer Operating Partnership I,
                                       L.P., a Delaware limited
                                       partnership, its general partner

                                       By:  Brandywine Holdings I, Inc., a
                                            Pennsylvania corporation, its
                                            general partner

                                             By:___________________________
                                                 Name:   Gerard H. Sweeney
                                                 Title:  President and Chief
                                                         Executive Officer


                                       D-2
<PAGE>   94
                                 LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a
                                 Pennsylvania limited partnership

                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer

                                 NICHOLS LANSDALE LIMITED PARTNERSHIP III,
                                 a Pennsylvania limited partnership

                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer

                                 NEWTECH III LIMITED PARTNERSHIP, a
                                 Pennsylvania limited partnership

                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer


                                       D-3
<PAGE>   95
                                 NEWTECH IV LIMITED PARTNERSHIP, a
                                 Pennsylvania limited partnership

                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer

                                 C/N OAKLANDS LIMITED PARTNERSHIP I, a
                                 Pennsylvania limited partnership

                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer

                                 FIFTEEN HORSHAM, L.P., a Pennsylvania
                                 limited partnership
 
                                 By:    Witmer Operating Partnership I,
                                        L.P., a Delaware limited
                                        partnership, its general partner

                                        By:    Brandywine Holdings I, Inc., a
                                               Pennsylvania corporation, its
                                               general partner

                                               By:___________________________
                                                  Name:   Gerard H. Sweeney
                                                  Title:  President and Chief
                                                          Executive Officer


                                       D-4
<PAGE>   96
                                  C/N LEEDOM LIMITED PARTNERSHIP II, a
                                  Pennsylvania limited partnership

                                  By:    Brandywine Operating Partnership,
                                         L.P., a Delaware limited
                                         partnership, its general partner

                                         By:    Brandywine Realty Trust, a
                                                Maryland real estate
                                                investment trust, its general
                                                partner

                                                By:___________________________
                                                   Name:   Gerard H. Sweeney
                                                   Title:  President and Chief
                                                           Executive Officer

                                  C/N IRON RUN LIMITED PARTNERSHIP III, a
                                  Pennsylvania limited partnership

                                  By:    Brandywine Operating Partnership,
                                         L.P., a Delaware limited
                                         partnership, its general partner

                                         By:    Brandywine Realty Trust, a
                                                Maryland real estate
                                                investment trust, its general
                                                partner

                                                By:___________________________
                                                   Name:   Gerard H. Sweeney
                                                   Title:  President and Chief
                                                           Executive Officer


                                       D-5
<PAGE>   97
                                    EXHIBIT E


                  1. Prior to the requested date of inclusion of an Additional
Property in the collateral pool for the Credit Facility, Co-Lenders shall have
received the following due diligence materials with respect to such Additional
Property, each of which shall be in form and substance satisfactory in all
respects to Co-Lenders and their counsel:

                           (a) A detailed description of the Additional Property
                  and pertinent market data pertaining to this Additional
                  Property.

                           (b) An up-to-date survey (i.e., sufficiently current
                  to cause the standard survey exception to be deleted from the
                  mortgage title insurance policies described below), which
                  survey shall be prepared by a surveyor acceptable to
                  Co-Lenders and the Title Company and shall be certified to the
                  Title Company and to Co-Lenders.

                           (c) A written commitment of the Title Company to
                  issue a mortgage title insurance policy insuring the lien of
                  the Mortgage as a first lien on the Additional Property for
                  the full amount outstanding from time to time under the Credit
                  Facility, subject only to those exceptions to title as are
                  approved by Co-Lenders and their counsel, and with affirmative
                  insurance on such matters as Co-Lenders or their counsel may
                  require.

                           (d) Executed copies (certified by Borrowers to be
                  true, correct and complete) of the Ground Lease, if any, the
                  REA, if any, and all other agreements of any nature whatsoever
                  affecting or relating to the use, operation or development of
                  the Additional Property. Notwithstanding the foregoing, if
                  final executed copies of any of the foregoing Material
                  Agreements are not available, the most current version of such
                  Agreements shall be furnished to Co-Lenders and all
                  subsequent drafts thereof (blacklined to show all changes made
                  to the draft previously distributed to Co-Lenders) shall be
                  furnished to Co-Lenders as they are available.

                           (e) Copies of all Leases affecting the Additional
                  Properties and a certified rent roll for the Additional
                  Properties.

                           (f) Evidence of compliance with all zoning,
                  environmental and other laws, ordinances, rules, regulations
                  and restrictions affecting the Additional Property and the
                  operation and use of the Additional Property. Co-Lenders
                  acknowledge that, in some jurisdictions, public officials will
                  not issue comfort letters with respect to zoning laws and,
                  with respect to such jurisdictions, Co-Lenders will accept a
                  certification of a qualified engineer or other evidence of
                  compliance in form and substance satisfactory to Co-Lenders.

                           (g) Permanent certificate(s) of occupancy (or, if
                  unavailable in the applicable jurisdiction, other evidence
                  satisfactory to Co-Lenders confirming such Additional
                  Property's compliance with applicable building code
                  requirements) and all other licenses, permits and approvals
                  required for the use and operation of the Additional Property,
                  including enclosed parking structures and pools.

                           (h) A detailed structural and physical inspection
                  report prepared by an inspecting engineer designated by
                  Borrowers and


                                       E-1
<PAGE>   98
                  approved by Co-Lenders, which report shall be dated no earlier
                  than six (6) months prior to the date of inclusion of the 
                  Additional Property in the collateral pool for the Credit 
                  Facility (it being agreed that there shall have been no
                  significant capital expenditures or repair at the Additional
                  Property subsequent to the date of such report), shall give a
                  detailed description of the physical condition of such
                  Additional Property shall indicate that such Additional
                  Property is generally in good condition and repair and shall
                  otherwise be in form and substance acceptable to Co-Lenders.
                  Notwithstanding Co-Lenders' approval of the inspecting
                  engineer, Co-Lenders shall not incur any liability as a result
                  of such inspecting engineer's failure to deliver the required
                  satisfactory structural and physical inspection report within
                  the time period required hereby, it being expressly understood
                  that Borrowers acknowledge and assume all risks in connection
                  therewith.

                           (i) Copies of real estate tax bills (or other
                  evidence of the real estate taxes allocable to the Additional
                  Property) for the preceding two (2) years; and copies of
                  utility bills for the preceding two (2) years, provided,
                  however, if Borrowers is unable to obtain copies of such
                  utility bills for the second preceding year from the seller of
                  the Additional Property, copies of utility bills for the
                  immediately preceding year shall be sufficient.

                           (j) In the case of unimproved land, evidence from the
                  utility companies and municipalities servicing the local in
                  which such unimproved land is located that water, sewer,
                  electric, telephone and gas services are and will continue to
                  be available to the improvements to be constructed as part of
                  the Development thereof. The requirement set forth in this
                  subparagraph shall be satisfied as a condition precedent to
                  acquisition of any unimproved land (irrespective of whether
                  constituting part of the collateral pool for the Credit
                  Facility).

                           (k) Evidence of insurance satisfying the requirements
                  of paragraph 30 of the main body of this Agreement.

                           (l) A current (i.e. dated not earlier than six months
                  prior to delivery) phase one level environmental audit report
                  (and such additional reports as may be required by Co-Lenders
                  if any environmental problems are disclosed by the phase one
                  level reports) prepared by qualified environmental
                  consultant(s) or firm(s) designated and retained by Borrowers
                  and approved by Co-Lenders, which reports shall indicate that
                  such Additional Property is free and clear of all Hazardous
                  Materials, and complies in all respects with all Environmental
                  Requirements, and shall otherwise be in form and substance
                  satisfactory in all respects to Co-Lenders. Notwithstanding
                  that the environmental consultant is approved by Co-Lenders,
                  Co-Lenders shall not incur any liability as a result of such
                  environmental consultant's failure to deliver the required
                  satisfactory environmental reports within the time period
                  required hereby, it being expressly understood that Borrowers
                  acknowledge and assume all risks in connection therewith.

                           (m) A comprehensive current written "as is" appraisal
                  report prepared by an MAI appraiser designated by Agent and
                  complying with FIRREA standards. The basis of the appraisal
                  calculation shown in the appraisal report and all other
                  aspects of the appraisal report shall be satisfactory in all
                  respects to Co-Lenders. Notwithstanding Co-Lenders'
                  designation of the MAI


                                       E-2
<PAGE>   99
                  appraiser, Co-Lenders shall not incur any liability as a 
                  result of such appraiser's failure to deliver the required 
                  satisfactory appraisal reports within the time period
                  required hereby, it being expressly understood that Borrowers
                  acknowledge and assume all risks in connection therewith.

                           (n) Copies of unaudited financial reports required by
                  paragraph 28 of this Agreement with respect to the Additional
                  Property for the immediately preceding three (3) years;
                  provided, however, if Borrowers is unable to obtain all such
                  reports from the seller of the Additional Property, copies of
                  such unaudited financial reports for the immediately preceding
                  year shall be sufficient.

                           (o) Detailed operating projections with respect to
                  the Additional Property for not less than three (3) years
                  (including all projected capital expenditures) and two (2)
                  years of historicals, if available.

                           (p) Such other documents, instruments, certificates,
                  opinions, assurances, consents, or approvals as Agent or its
                  counsel may reasonably request or require.

                           (q) If applicable, all Required Due Diligence
                  Materials shall cover any undeveloped land adjacent to the
                  Additional Property being acquired by Borrowers.

                  2. Borrowers shall have executed and delivered, or caused to
be executed and delivered, each of the following documents and/or instruments
with respect to the Additional Property, each of which shall be in form and
substance satisfactory in all respects to Agent and its counsel:

                           (a) Estoppel letters from all parties other than
                  Borrowers to the agreements listed in paragraph 1(d) of this
                  Exhibit E, it being understood that to the extent any such
                  other party is not obligated to provide such estoppel letter
                  pursuant to the terms and provisions of the agreement in
                  question, Borrowers shall use commercially reasonable efforts
                  to obtain such an estoppel letter. Estoppels from such tenants
                  under the Leases as may be required by Co-Lenders.

                           (b) Mortgage given by Borrowers to Co-Lenders
                  (alternatively, if the Additional Property is located in a
                  jurisdiction where there is an outstanding Mortgage of record,
                  and if feasible in the opinion of Co-Lenders, and acceptable
                  to Borrowers, such Mortgage will be modified by an Amendment
                  of Mortgage pursuant to which the lien of such Mortgage will
                  be spread to cover the Additional Property).

                           (c) Assignment of Leases and Rents given by Borrowers
                  to Agent (alternatively, if the Additional Property is located
                  in a jurisdiction where there is an outstanding Assignment of
                  Leases of record, and if feasible in the opinion of
                  Co-Lenders, and acceptable to Borrowers, such Assignment of
                  Leases will be modified by an Amendment of Assignment of
                  Leases pursuant to which the lien of such Assignment of Leases
                  will be spread to cover the Additional Property).

                           (d) UCC Financing Statements.


                                       E-3
<PAGE>   100
                           (e) Such other documents, instruments, certificates,
                  opinions, assurances, consents, or approvals as Agent or its
                  counsel may reasonably request or require.

                  3. Borrowers shall be required to pay all fees, commissions,
costs, charges, taxes and other expenses incurred by Co-Lenders in connection
with the inclusion of an Additional Property in the collateral pool for the
Credit Facility, including but not limited to reasonable fees of Co-Lenders'
counsel, appraisal fees, fees and expenses incurred in accounting review, fees
and charges for surveys, examination of title to the Additional Property and
mortgage title insurance thereon, hazard insurance, mortgage taxes, transfer
taxes and all recording fees and charges.

                  4. Co-Lenders shall not be required to pay any brokerage fees
or commissions or other remuneration of any nature whatsoever arising from the
inclusion of an Additional Property in the collateral pool for the Credit
Facility, and Borrowers agrees, to defend, indemnify, and hold Co-Lenders
harmless from and against any and all such claims in connection therewith and
brought by any party claiming a fee, commission or other compensation from, by,
through or under Borrowers or otherwise as the result of dealings or alleged
dealings with Borrowers.


                                       E-4
<PAGE>   101
                                    EXHIBIT F

                              (Initial Properties)

<TABLE>
<CAPTION>
              Name                   Address                       Owner
<S>                            <C>                              <C>                                                    
        Keith Valley 1         One Progress Avenue,             LC/N Horsham
                               Montgomery County, PA            Limited Partnership

        Keith Valley 7         500 Enterprise Road,             LC/N Keith Valley
                               Montgomery County, PA            Limited Partnership I

        Lansdale 150           1510 Gehman Road, Montgomery     Nichols Lansdale
                               County, PA                       Limited Partnership III

        Newtown 12             16 Campus Boulevard, Delaware    Newtech III
                               County, PA                       Limited Partnership

        Newtown 11             18 Campus Boulevard, Delaware    Newtech IV
                               County, PA                       Limited Partnership

        Oaklands 5             456 Creamery Way, Chester        C/N Oaklands
                               County, PA                       Limited Partnership I

        Horsham 15             1155 Business Center Drive,      Fifteen Horsham, L.P.
                               Montgomery County, PA

        Meeting House 1        2240/50 Butler Pike,             BOP
                               Montgomery County, PA

        Meeting House 2        120 West Germantown Pike,        C/N Leedom
                               Montgomery County, PA            Limited Partnership II

        Meeting House 3        140 West Germantown Pike,        BOP
                               Montgomery County, PA

        Meeting House 4        2260 Butler Pike, Montgomery     BOP
                               County, PA

        Iron Run 3             7248 Tilghman, Lehigh County,    C/N Iron Run
                               PA                               Limited Partnership III

        700 & 800 Horsham      700 & 800 Horsham Business       BOP
        Business Center (2     Center, Montgomery County, PA
        buildings)

        Delaware Corp. Center  Delaware Corp. Center 1, New     BOP
        1                      Castle County, DE

        8000 Lincoln Drive     8000 Lincoln Drive, Burlington   BOP
                               County, NJ

        BCBP 2250              2250 Cabot Boulevard, Bucks      BOP
                               County, PA

        BCBP 2200              2200 Cabot Boulevard, Bucks      BOP
                               County, PA

        BCBP 2260/2270 (2      2260/2270 Cabot Boulevard,       BOP
        buildings)             Bucks County, PA

        BCBP 3000              3000 Cabot Boulevard, Bucks      BOP
                               County, PA

        One/Two/Three          33 Street Road, Bucks County,    BOP
        Greenwood Square (3    PA
        buildings)

        500 N. Gulph Road      500 N. Gulph Road, Montgomery    BOP
                               County, PA
</TABLE>
<PAGE>   102
                                    Exhibit G








- --------------------------------------------------------------------------------


                     BRANDYWINE OPERATING PARTNERSHIP, L.P.,
                  a Delaware limited partnership, as Mortgagor

                                       to

                       NATIONSBANK, N.A., not individually
                  but acting in its capacity as administrative
                    and documentation agent for the equal and
                        ratable benefit of the co-lenders
                         described herein, as Mortgagee



                           --------------------------

                                    MORTGAGE

                           --------------------------



                        Dated: As of ______________, 199_

                        Location: ____________________
                                  ____________________
                                  ____________________
                                           



                              RECORD AND RETURN TO:

                              Battle Fowler LLP
                              Park Avenue Tower
                              75 East 55th Street
                              New York, New York 10022

                              Attention: Dean A. Stiffle, Esq.










- --------------------------------------------------------------------------------
<PAGE>   103
                                TABLE OF CONTENTS
                                                                           PAGE
                                                                           ----

        1.  Payment of Debt.................................................  3

        2.  Warranty of Title...............................................  3

        3.  Leases and Rents................................................  3

        4.  Notice..........................................................  4

        5.  Sale of Mortgaged Property......................................  5

        6.  Changes in Laws Regarding Taxation..............................  5

        7.  No Credits on Account of the Debt...............................  5

        8.  Documentary Stamps..............................................  5

        ***[9.  The Ground Lease............................................  5

        ***[10.  No Merger of Fee and Leasehold Estates.....................  6

        11.  Events of Default..............................................  7

        12.  Appointment of Receiver........................................  7

        13.  Non-Waiver.....................................................  7

        14.  Construction...................................................  8

        15.  Security Agreement.............................................  8

        16.  Further Acts, etc..............................................  8

        17.  Headings, etc..................................................  9

        18.  Filing of Mortgage, etc........................................  9

        19.  Recovery of Sums Required To Be Paid...........................  9

        20.  Actions, Cases and Proceedings.................................  9

        21.  Inapplicable Provisions........................................  9

        22.  Duplicate Originals............................................  9

        23.  Certain Usage..................................................  9

        24.  Waiver of Notice...............................................  9

        25.  No Oral Change................................................. 10

        26.  Waiver of Statutory Rights..................................... 10

        27.  Credit Agreement............................................... 10

        28.  Revolving Credit Facility...................................... 10

        29.  Binding Effect................................................. 11
<PAGE>   104
                                                                           PAGE
                                                                           ----

        30.  Exculpation.................................................... 11

               ACKNOWLEDGEMENT
               EXHIBIT A            (Definitions)
               EXHIBIT B            (Description of Premises)
               ***[EXHIBIT B-1      (Description of Ground Lease)]***


                                      -ii-
<PAGE>   105
                                    MORTGAGE



                      This Mortgage entered into as of the ___ day of ________,
        199_, between BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited
        partnership having an office c/o Brandywine Realty Trust, Newtown Square
        Corporate Campus, 16 Campus Boulevard, Suite 150, Newtown Square,
        Pennsylvania (hereinafter referred to as "Mortgagor"); and NATIONSBANK,
        N.A., a national banking association having an office at 8300 Greensboro
        Drive, McLean, Virginia, not individually, but acting in its capacity as
        administrative and documentation agent for the equal and ratable benefit
        of Co-Lenders, pursuant to and in accordance with the terms and
        provisions of the Credit Agreement (NationsBank, N.A., acting in such
        capacity as administrative and documentation agent being hereinafter
        referred to as "Mortgagee").

                              PRELIMINARY STATEMENT

               A. All capitalized terms as used in this Mortgage shall, unless
otherwise defined in this Mortgage, have the meanings given to such terms in
Exhibit A attached hereto.

               ***[B. Mortgagor is the owner of a fee estate in the premises
described in Exhibit B attached hereto (hereinafter referred to as the
"Premises").]***

               ***[B. Mortgagor is the owner of a leasehold estate in the
premises described in Exhibit B attached hereto (the "Premises") under and
pursuant to the provisions of the lease described in Exhibit B-1 attached hereto
(hereinafter referred to as the "Ground Lease").]***

               C. Co-Lenders have on the terms, covenants and provisions set
forth in the Credit Agreement extended to Mortgagor a revolving credit facility
in the principal sum of up to, but not in excess of, $80,000,000 (hereinafter
referred to as the "Credit Facility"), which Credit Facility is evidenced by,
and payable together with interest thereon in accordance with the provisions of,
the Credit Facility Notes.

               ***[D. Co-Lenders were willing to extend the Credit Facility to
Mortgagor only if Mortgagor executed and delivered this Mortgage to Mortgagee,
as administrative and documentation agent for the equal and ratable benefit of
Co-Lenders, as security for the payment of the Debt]***.

               ***[D. Co-Lenders have approved the inclusion of the Premises and
the Improvements as part of the collateral pool for the Credit Facility in
accordance with the provisions of the Credit Agreement, and in connection
therewith, and as consideration therefor, Mortgagor has agreed to execute and
deliver this Mortgage to Mortgagee, as administrative and documentation agent
for the equal and ratable benefit of Co-Lenders, as security for the payment of
the Debt.]***

               E. NOW, THEREFORE, to secure the payment of an indebtedness in
the principal sum of up to, but not in excess of, Eighty Million and 00/100
Dollars ($80,000,000.00), lawful money of the United States of America, or so
much thereof as may be advanced and readvanced and be outstanding from time to
time in accordance with the provisions of the Credit Agreement, to be paid with
interest in accordance with the provisions of the Credit Facility Notes
<PAGE>   106
and the Credit Agreement (said indebtedness, interest and any and all sums which
may or shall become due in accordance with the provisions of the Credit Facility
Documents being hereinafter collectively referred to as the "Debt"), Mortgagor
has mortgaged, given, granted, bargained, sold, aliened, enfeoffed, conveyed,
confirmed and assigned, and by these presents does mortgage, give, grant,
bargain, sell, alien, enfeoff, convey, confirm and assign unto Mortgagee forever
all right, title and interest of Mortgagor now owned, or hereafter acquired, in
and to the following property, rights and interests (such property, rights and
interests being hereinafter collectively referred to as the "Mortgaged
Property"):

               (a) the Premises;

               (b) all buildings and improvements now or hereafter located on 
         the Premises (hereinafter referred collectively to as the
         "Improvements");

               ***[(b)(1) the Ground Lease and the leasehold estate created
         thereunder;]***

               ***[(b)(2) all modifications, extensions and renewals of the 
         Ground Lease and all credits, deposits, options, purchase options,
         privileges and rights of Mortgagor under and in accordance with the
         provisions of the Ground Lease, including, but not limited to, the
         right, if any, to renew or extend the Ground Lease for a succeeding
         term or terms or to acquire fee title to or other interest in all or
         any portion of the Premises or the Improvements;]***

               (c) all of the estate, right, title, claim or demand of any 
         nature whatsoever of Mortgagor, either in law or in equity, in
         possession or expectancy, in and to the Mortgaged Property or any part
         thereof;

               (d) all easements, rights-of-way, gores of land, streets, ways,
         alleys, passages, sewer rights, waters, water courses, water rights and
         powers, and all estates, rights, titles, interests, privileges,
         liberties, tenements, hereditaments, and appurtenances of any nature
         whatsoever, in any way belonging, relating or pertaining to the
         Mortgaged Property (including, without limitation, any and all
         development rights, air rights or similar or comparable rights of any
         nature whatsoever now or hereafter appurtenant to the Premises or now
         or hereafter transferred to the Premises) and all land lying in the bed
         of any street, road or avenue, opened or proposed, in front of or
         adjoining the Premises to the center line thereof;

               (e) all FF&E and the right, title and interest of Mortgagor in
         and to any of the FF&E which may be subject to any security agreements
         (as defined in the Uniform Commercial Code) superior in lien to the
         lien of this Mortgage;

               (f) all awards or payments, including interest thereon, if any, 
         and the right to receive the same, which may be made with respect to
         the Mortgaged Property, whether from the exercise of the right of
         eminent domain (including any transfer made in lieu of the exercise of
         said right), or for any other injury to or decrease in the value of the
         Mortgaged Property;


                                       -2-
<PAGE>   107
               (g) all leases, licenses and other agreements ***[(other than the
         Ground Lease)]*** affecting or relating to the use or occupancy of the
         Mortgaged Property now or hereafter entered into (such leases, licenses
         and other agreements are hereinafter collectively referred to as the
         "Leases") and the right to receive and apply the rents, income,
         revenues, receipts, accounts, accounts receivable, issues and profits
         of or derived from or relating to the Mortgaged Property (hereinafter
         collectively referred to as the "Rents") to the payment of the Debt;

               (h) all proceeds of and any unearned premiums on any insurance
         policies covering the Mortgaged Property, including, without
         limitation, the right (subject to the provisions of the Credit
         Agreement) to receive and apply the proceeds of any insurance,
         judgments, or settlements made in lieu thereof, for damage to the
         Mortgaged Property; and

               (i) the right to appear in and defend any action, case or 
         proceeding brought with respect to the Mortgaged Property and to
         commence any action, case or proceeding to protect the interest of
         Mortgagee in the Mortgaged Property;

               TO HAVE AND TO HOLD the above granted and described Mortgaged
Property unto and to the proper use and benefit of Mortgagee, and the successors
and assigns of Mortgagee, forever;

               AND Mortgagor covenants and agrees with and represents and
warrants to Mortgagee as follows:

               1. PAYMENT OF DEBT. Mortgagor will pay the Debt at the time and
in the manner provided for its payment in the Credit Facility Documents.

               2. WARRANTY OF TITLE. Subject only to those exceptions to title
specifically set forth in the title policy issued or to be issued by the Title
Company to Mortgagee and insuring the lien of this Mortgage, Mortgagor warrants
the title to the Premises, the Improvements, the FF&E ***[, the Ground Lease]***
and the balance of the Mortgaged Property. ***[In addition, Mortgagor represents
and warrants that (i) the Ground Lease is in full force and effect and has not
been modified or amended in any manner whatsoever, (ii) there are no defaults
under the Ground Lease and no event has occurred, which but for the passage of
time, or notice, or both, would constitute a default under the Ground Lease,
(iii) all rents, additional rents and other sums due and payable under the
Ground Lease have been paid in full, and (iv) no action, case or proceeding has
commenced and no notice has been given or received for the purpose of
terminating the Ground Lease.]***

               3. LEASES AND RENTS. Subject to the terms of this paragraph,
Mortgagee waives the right to enter the Mortgaged Property for the purpose of
collecting the Rents, and grants Mortgagor the right to collect the Rents.
Mortgagor shall collect and hold the Rents, or an amount sufficient to discharge
all current sums due on the Debt, in trust for use in payment of the Debt. The
right of Mortgagor to collect the Rents may be revoked by Mortgagee upon the
occurrence of any Event of Default by giving notice of such revocation to
Mortgagor. Following such notice and as long as such Event of Default is
continuing (it being understood that the decision whether or not to accept the
cure of an Event of Default shall be in the sole and absolute discretion of
Mortgagee), Mortgagee may retain and apply the Rents toward payment of the Debt
in such order, priority and proportions as Mortgagee, in its discretion, shall
deem proper, or to the operation, maintenance and repair of the Mortgaged
Property, and irrespective of whether Mortgagee shall have


                                       -3-
<PAGE>   108
commenced a foreclosure of this Mortgage or shall have applied or arranged for
the appointment of a receiver. In addition, Mortgagee shall have the absolute
and unconditional right following the occurrence and during the continuance of
an Event of Default to notify the tenants under the Leases that all Rents should
be paid directly to Mortgagee. In addition to the rights which Mortgagee may
have herein, if an Event of Default shall occur and shall be continuing
Mortgagee, at its option, may require Mortgagor to pay monthly in advance to
Mortgagee, or any receiver appointed to collect the Rents, the fair and
reasonable rental value for the use and occupation of such part of the Mortgaged
Property as may be in possession of Mortgagor. Upon default in any such payment,
Mortgagor will vacate and surrender possession of the Mortgaged Property to
Mortgagee, or to such receiver and, in default thereof, Mortgagor may be evicted
by summary proceedings or otherwise. Nothing contained in this paragraph shall
be construed as imposing on Mortgagee any of the obligations of the landlord
under the Leases.

               4. NOTICE. Any notice, request, demand, statement, authorization,
approval or consent made hereunder shall be in writing and shall be sent by
Federal Express, or other reputable national courier service, or by postage
pre-paid registered or certified mail, return receipt requested, and shall be
deemed given (i) when received at the following addresses if sent by Federal
Express, or other reputable national courier service, and (ii) three (3)
business days after being postmarked and addressed as follows if sent by
registered or certified mail, return receipt requested:

               If to Mortgagor:

                      c/o Brandywine Realty Trust
                      Newtown Square Corporate Campus
                      16 Campus Boulevard, Suite 150
                      Newtown Square, Pennsylvania 19073
                      Attention:  Gerard H. Sweeney
                                  President and Chief Executive Officer

               With a copy to:

                      Pepper, Hamilton & Scheetz
                      3000 Two Logan Square
                      Eighteenth and Arch Streets
                      Philadelphia, Pennsylvania 19103-2799
                      Attention:  Michael H. Friedman, Esq.

               If to Mortgagee:

                      NationsBank, N.A.
                      Real Estate Banking
                      8300 Greensboro Drive
                      McLean, Virginia 22102-3604
                      Attention:  Gary P.F. Carr
                                  Vice President

               With copies to:

                      Cadwalader, Wickersham & Taft
                      201 South College Street - Suite 1510
                      Charlotte, North Carolina 28244
                      Attention:  James P. Carroll, Esq.


                                       -4-
<PAGE>   109
                                    and

                      Battle Fowler LLP
                      Park Avenue Tower
                      75 East 55th Street
                      New York, New York 10022
                      Attention:  Dean A. Stiffle, Esq.

Each party may designate a change of address by notice to the other party, given
at least fifteen (15) days before such change of address is to become effective.

               5. SALE OF MORTGAGED PROPERTY. If this Mortgage is foreclosed,
the Mortgaged Property, or any interest therein, may, at the discretion of
Mortgagee, be sold in one or more parcels or in several interests or portions
and in any order or manner.

               6. CHANGES IN LAWS REGARDING TAXATION. In the event of the
passage after the date of this Mortgage of any law of the State in which the
Premises are located deducting from the value of real property for the purpose
of taxation any lien or encumbrance thereon or changing in any way the laws for
the taxation of mortgages or debts secured by mortgages for state or local
purposes or the manner of the collection of any such taxes, and imposing a tax,
either directly or indirectly, on this Mortgage, the Credit Facility Notes or
the Debt, Mortgagor shall, if permitted by law, pay any tax imposed as a result
of any such law within the statutory period or within thirty (30) days after
demand by Mortgagee, whichever is less, provided, however, that if, in the
opinion of the attorneys for Mortgagee, Mortgagor is not permitted by law to pay
such taxes, Mortgagee shall have the right, at its option, to declare the Debt
due and payable on a date specified in a prior notice to Mortgagor of not less
than sixty (60) days.

               7. NO CREDITS ON ACCOUNT OF THE DEBT. Mortgagor will not claim or
demand or be entitled to any credit or credits on account of the Debt for any
part of the Taxes assessed against the Mortgaged Property or any part thereof
and no deduction shall otherwise be made or claimed from the taxable value of
the Mortgaged Property, or any part thereof, by reason of this Mortgage or the
Debt.

               8. DOCUMENTARY STAMPS. If at any time the United States of
America, any state thereof, or any governmental subdivision of any such state,
shall require revenue or other stamps to be affixed to the Credit Facility Notes
(or any of them), this Mortgage or any of the other Credit Facility Documents,
Mortgagor will, to the extent permitted by law, pay for the same, with interest
and penalties thereon, if any.

               ***[9. THE GROUND LEASE. Mortgagor shall (i) pay all rents,
additional rents and other sums required to be paid by Mortgagor as ground
lessee under and pursuant to the provisions of the Ground Lease, (ii) diligently
perform and observe all of the terms, covenants and conditions of the Ground
Lease on the part of Mortgagor, as ground lessee thereunder, to be performed and
observed, unless such performance or observance shall be waived or not required
in writing by the ground lessor under the Ground Lease, to the end that all
things shall be done which are necessary to keep unimpaired the rights of
Mortgagor, as ground lessee, under the Ground Lease, and (iii) promptly (but in
no event later than five (5) business days after notice thereof) notify
Mortgagee of the giving of any notice by the ground lessor under the Ground
Lease to Mortgagor of any default by Mortgagor in the


                                       -5-
<PAGE>   110
performance or observance of any of the terms, covenants or conditions of the
Ground Lease on the part of Mortgagor, as ground lessee thereunder, to be
performed or observed, and deliver to Mortgagee a true copy of each such notice.
Mortgagor shall not, without the prior consent of Mortgagee, surrender the
leasehold estate created by the Ground Lease or terminate or cancel the Ground
Lease or modify, change, supplement, alter or amend the Ground Lease, in any
respect, either orally or in writing, and Mortgagor hereby assigns to Mortgagee,
as further security for the payment of the Debt and for the performance and
observance of the terms, covenants and conditions of this Mortgage, all of the
rights, privileges and prerogatives of Mortgagor, as ground lessee under the
Ground Lease, to surrender the leasehold estate created by the Ground Lease or
to terminate, cancel, modify, change, supplement, alter or amend the Ground
Lease, and any such surrender of the leasehold estate created by the Ground
Lease or termination, cancellation, modification, change, supplement, alteration
or amendment of the Ground Lease without the prior consent of Mortgagee shall be
void and of no force and effect. If Mortgagor shall default in the performance
or observance of any term, covenant or condition of the Ground Lease on the part
of Mortgagor, as ground lessee thereunder, to be performed or observed, then,
without limiting the generality of the other provisions of this Mortgage, and
without waiving or releasing Mortgagor from any of its obligations hereunder,
Mortgagee shall have the right, but shall be under no obligation, to pay any
sums and to perform any act or take any action as may be appropriate to cause
all of the terms, covenants and conditions of the Ground Lease on the part of
Mortgagor, as ground lessee thereunder, to be performed or observed to be
promptly performed or observed on behalf of Mortgagor, to the end that the
rights of Mortgagor in, to and under the Ground Lease shall be kept unimpaired
and free from default, and Mortgagor shall upon demand of Mortgagee reimburse
Mortgagee for all sums so paid by Mortgagee and for all expenses (including,
reasonable attorneys fees) actually incurred by Mortgagee in taking any such
action, together with interest thereon at the Default Rate. If Mortgagee shall
make any payment or perform any act or take any action in accordance with the
preceding sentence, Mortgagee will notify Mortgagor of the making of any such
payment, the performance of any such act, or the taking of any such action. In
any such event, Mortgagee its agents and employees shall have, and are hereby
granted, the right to enter upon the Mortgaged Property at any time and from
time to time for the purpose of taking any such action. If the ground lessor
under the Ground Lease shall deliver to Mortgagee a copy of any notice of
default sent by said ground lessor to Mortgagor, as ground lessee under the
Ground Lease, such notice shall constitute full protection to Mortgagee for any
action taken or omitted to be taken by Mortgagee, in good faith, in reliance
thereon. Mortgagor shall, from time to time, use commercially reasonable best
efforts to obtain from the ground lessor under the Ground Lease such
certificates of estoppel with respect to compliance by Mortgagor with the terms
of the Ground Lease as may be requested by Mortgagee, to the extent the ground
lessor is obligated to provide such certificates of estoppel pursuant to the
terms and provisions of the Ground Lease. Mortgagor shall exercise each
individual option, if any, to extend or renew the term of the Ground Lease upon
demand by Mortgagee made at any time within one (1) year of the last day upon
which any such option may be exercised, and Mortgagor hereby expressly
authorizes and appoints Mortgagee its attorney-in-fact to exercise, either
jointly or individually, any such option in the name of and upon behalf of
Mortgagor, which power of attorney shall be irrevocable and shall be deemed to
be coupled with an interest.]***

               ***[10. NO MERGER OF FEE AND LEASEHOLD ESTATES. So long as any
portion of the Debt shall remain unpaid, unless Mortgagee shall otherwise
consent, the fee title to the Premises and the leasehold estate therein


                                       -6-
<PAGE>   111
created pursuant to the provisions of the Ground Lease shall not merge, but
shall always be kept separate and distinct, notwithstanding the union of such
estates in Mortgagor or in any other person, by purchase, operation of law or
otherwise. If Mortgagee shall acquire the fee title to the Premises and the
leasehold estate therein created pursuant to the provisions of the Ground Lease,
by foreclosure of this Mortgage or otherwise, such estates shall not merge as a
result of such acquisition and shall remain separate and distinct for all
purposes after such acquisition unless and until Mortgagee shall elect to merge
such estates.]***

               11. EVENTS OF DEFAULT. The Debt shall become due at the option of
Mortgagee upon the occurrence of any one or more of the Events of Default.

               12. APPOINTMENT OF RECEIVER. Mortgagee, in any action to
foreclose this Mortgage or upon the actual or threatened waste to any part of
the Mortgaged Property or upon the occurrence of any Event of Default, shall be
at liberty, without notice, to apply for the appointment of a receiver of the
Rents, and shall be entitled to the appointment of such receiver as a matter of
right, without regard to the value of the Mortgaged Property as security for the
Debt, or the solvency or insolvency of any person then liable for the payment of
the Debt.

               13. NON-WAIVER. The failure of Mortgagee to insist upon strict
performance of any term of this Mortgage shall not be deemed to be a waiver of
any term of this Mortgage. Mortgagor shall not be relieved of Mortgagor's
obligation to pay the Debt at the time and in the manner provided for its
payment in the Credit Facility Documents by reason of (i) failure of Mortgagee
to comply with any request of Mortgagor to take any action to foreclose this
Mortgage or any other mortgage or deed of trust securing the Debt or any portion
thereof or otherwise enforce any of the provisions of this Mortgage or any of
the other Credit Facility Documents, (ii) the release, regardless of
consideration, of the whole or any part of the Mortgaged Property or any other
security for the Debt, or (iii) any agreement or stipulation between Mortgagee
and any subsequent owner or owners of the Mortgaged Property or other person
extending the time of payment or otherwise modifying or supplementing the terms
of the Credit Facility Documents without first having obtained the consent of
Mortgagor, and in the latter event, Mortgagor shall continue to be obligated to
pay the Debt at the times and in the manner provided in the Credit Facility
Documents, as so extended, modified and supplemented, unless expressly released
and discharged from such obligation by Mortgagee in writing. Regardless of
consideration, and without the necessity for any notice to or consent by the
holder of any subordinate lien, encumbrance, right, title or interest in or to
the Mortgaged Property, Mortgagee may release any person at any time liable for
the payment of the Debt or any portion thereof or any part of the security held
for the Debt and may extend the time of payment of the Debt or otherwise modify
the terms of the Credit Facility Documents, including, without limitation, a
modification of the interest rate payable on the Principal Balance of the Credit
Facility Notes, without in any manner impairing or affecting this Mortgage or
the lien thereof or the priority of this Mortgage, as so extended and modified,
as security for the Debt over any such subordinate lien, encumbrance, right,
title or interest. Mortgagee may resort for the payment of the Debt to any other
security held by Mortgagee in such order and manner as Mortgagee, in its
discretion, may elect. Mortgagee may take action to recover the Debt, or any
portion thereof, or to enforce any covenant hereof without prejudice to the
right of Mortgagee thereafter to foreclose this Mortgage. Mortgagee shall not be
limited exclusively to the rights and remedies herein stated but shall be
entitled to every additional right and remedy set forth in the Credit Facility


                                       -7-
<PAGE>   112
Documents or now or hereafter afforded by law. The rights of Mortgagee under
this Mortgage and the other Credit Facility Documents shall be separate,
distinct and cumulative and none shall be given effect to the exclusion of the
others. No act of Mortgagee shall be construed as an election to proceed under
any one provision of this Mortgage or of the other Credit Facility Documents to
the exclusion of any other provision set forth in this Mortgage or the other
Credit Facility Documents.

               14. CONSTRUCTION. The terms of this Mortgage shall be construed
in accordance with the laws of the State in which the Premises are located.

               15. SECURITY AGREEMENT. This Mortgage constitutes both a real
property mortgage and a "security agreement", within the meaning of the Uniform
Commercial Code, and the Mortgaged Property includes both real and personal
property and all other rights and interest, whether tangible or intangible in
nature, of Mortgagor in the Mortgaged Property. Mortgagor by executing and
delivering this Mortgage has granted to Mortgagee, as security for the Debt, a
security interest in the Mortgaged Property, including, without limitation,
FF&E. If an Event of Default shall occur, Mortgagee, in addition to any other
rights and remedies which it may have, shall have and may exercise immediately
and without demand any and all rights and remedies granted to a secured party
upon default under the Uniform Commercial Code, including, without limiting the
generality of the foregoing, the right to take possession of the FF&E or any
part thereof, and to take such other measures as Mortgagee may deem necessary
for the care, protection and preservation of the FF&E. Mortgagor shall pay to
Mortgagee on demand any and all expenses (including reasonable attorneys' fees)
actually incurred or paid by Mortgagee in protecting its interest in the FF&E
and in enforcing its rights hereunder with respect to the FF&E. Any notice of
sale, disposition or other intended action by Mortgagee with respect to the FF&E
sent to Mortgagor in accordance with the provisions of this Mortgage at least
seven (7) business days prior to the date of any such sale, disposition or other
action, shall constitute reasonable notice to Mortgagor (except in the case of
FF&E which is perishable or is of a type customarily sold on a recognized
market, in which case such seven (7) business days' notice shall not be
required), and the method of sale or disposition or other intended action set
forth or specified in such notice shall conclusively be deemed to be
commercially reasonable within the meaning of the Uniform Commercial Code unless
objected to in writing by Mortgagor within five (5) days after receipt by
Mortgagor of such notice. The proceeds of any sale or disposition of the FF&E,
or any part thereof, may be applied by Mortgagee to the payment of the Debt in
such order, priority and proportions as Mortgagee in its discretion shall deem
proper.

               16. FURTHER ACTS, ETC. Mortgagor will, at the cost of Mortgagor,
and without expense to Mortgagee, do, execute, acknowledge and deliver all and
every such further acts, deeds, conveyances, mortgages, assignments, notices of
assignments, transfers and assurances as Mortgagee shall, from time to time,
require for the better assuring, conveying, assigning, transferring and
confirming unto Mortgagee the property and rights hereby mortgaged or intended
now or hereafter so to be, or which Mortgagor may be or may hereafter become
bound to convey or assign to Mortgagee, or for carrying out the intention or
facilitating the performance of the terms of this Mortgage or for filing,
registering or recording this Mortgage and, on demand, will execute and deliver
and hereby authorizes Mortgagee to execute in the name of Mortgagor to the
extent Mortgagee may lawfully do so, one or more financing statements, chattel
mortgages or comparable security instruments, to evidence more effectively the
lien hereof upon the Mortgaged Property.


                                       -8-
<PAGE>   113
               17. HEADINGS, ETC. The headings, titles and captions of various
paragraphs of this Mortgage are for convenience of reference only and are not to
be construed as defining or limiting, in any way, the scope or intent of the
provisions hereof.

               18. FILING OF MORTGAGE, ETC. Mortgagor forthwith upon the
execution and delivery of this Mortgage and thereafter, from time to time, will
cause this Mortgage, and any security instrument creating a lien or evidencing
the lien hereof upon the Mortgaged Property and each instrument of further
assurance to be filed, registered or recorded in such manner and in such places
as may be required by any present or future law in order to publish notice of
and fully to protect, preserve and perfect the lien hereof upon, and the
interest of Mortgagee in, the Mortgaged Property. Mortgagor will pay all filing,
registration and recording fees, and all expenses incident to the preparation,
execution and acknowledgement of this Mortgage, any mortgage supplemental
hereto, any security instrument with respect to the Mortgaged Property, and any
instrument of further assurance, and all Federal, state, county and municipal
taxes, duties, imposts, assessments and charges arising out of or in connection
with the execution and delivery of this Mortgage, any mortgage supplemental
hereto, any security instrument with respect to the Mortgaged Property or any
instrument of further assurance. Mortgagor shall hold harmless and indemnify
Mortgagee, its successors and assigns, against any liability incurred by reason
of the imposition of any tax on the making and recording of this Mortgage.

               19. RECOVERY OF SUMS REQUIRED TO BE PAID. Mortgagee shall have
the right from time to time to take action to recover any sum or sums which
constitute a part of the Debt as the same become due, without regard to whether
or not the balance of the Debt shall be due, and without prejudice to the right
of Mortgagee thereafter to bring an action of foreclosure, or any other action,
for a default or defaults by Mortgagor existing at the time such earlier action
was commenced.

               20. ACTIONS, CASES AND PROCEEDINGS. Mortgagee shall have the
right to appear in and defend any action, case or proceeding brought with
respect to the Mortgaged Property and to bring any action, case or proceeding,
which Mortgagee, in its discretion, feels should be brought to protect its
interest in the Mortgaged Property.

               21. INAPPLICABLE PROVISIONS. If any term, covenant or condition
of this Mortgage shall be held to be invalid, illegal or unenforceable in any
respect, this Mortgage shall be construed without such provision.

               22. DUPLICATE ORIGINALS. This Mortgage may be executed in any
number of duplicate originals and each such duplicate original shall be deemed
to constitute but one and the same instrument.

               23. CERTAIN USAGE. Unless the context clearly indicates a
contrary intent or unless otherwise specifically provided herein, words used in
this Mortgage shall be used interchangeably in singular or plural form. Whenever
the context may require, any pronouns used herein shall include the
corresponding masculine, feminine or neuter forms, and the singular forms of
nouns and pronouns shall include the plural and vice versa.

               24. WAIVER OF NOTICE. Mortgagor shall not be entitled to any
notices of any nature whatsoever from Mortgagee except with respect to matters
for which this Mortgage specifically and expressly provides for the giving of
notice by Mortgagee to Mortgagor, and Mortgagor (to the full extent it may


                                       -9-
<PAGE>   114
lawfully do so) hereby expressly waives the right to receive any notice from
Mortgagee with respect to any matter for which this Mortgage does not
specifically and expressly provide for the giving of notice by Mortgagee to
Mortgagor.

               25. NO ORAL CHANGE. This Mortgage may only be modified, amended
or changed by an agreement in writing signed by Mortgagor and Mortgagee, and may
only be released, discharged or satisfied of record by an agreement in writing
signed by Mortgagee. No waiver of any term, covenant or provision of this
Mortgage shall be effective unless given in writing by Mortgagee and if so given
by Mortgagee shall only be effective in the specific instance in which given.

               26. WAIVER OF STATUTORY RIGHTS. Mortgagor shall not and will not
apply for or avail itself of any appraisement, valuation, stay, extension or
exemption laws, or any so-called "Moratorium Laws", now existing or hereafter
enacted, in order to prevent or hinder the enforcement or foreclosure of this
Mortgage, but hereby waives the benefit of such laws to the full extent that
Mortgagor may do so under applicable law. Mortgagor for itself and all who may
claim through or under it waives any and all right to have the property and
estates comprising the Mortgaged Property marshalled upon any foreclosure of the
lien of this Mortgage and agrees that any court having jurisdiction to foreclose
such lien may order the Mortgaged Property sold as an entirety. Mortgagor hereby
waives for itself and all who may claim through or under it, and to the full
extent Mortgagor may do so under applicable law, any and all rights of
redemption from sale under any order or decree of foreclosure of this Mortgage
or granted under any statute now existing or hereafter enacted.

               27. CREDIT AGREEMENT. This Mortgage is subject to all of the
terms, covenants and conditions of the Credit Agreement, which Credit Agreement
and all of the terms, covenants and conditions thereof are by this reference
incorporated herein with the same force and effect as if fully set forth herein.
The proceeds of the Credit Facility secured hereby are to be advanced and
readvanced by Mortgagee to Mortgagor in accordance with the provisions of the
Credit Agreement. Mortgagor shall observe and perform all of the terms,
covenants and conditions of the Credit Agreement on Mortgagor's part to be
observed or performed. All advances made and all indebtedness arising and
accruing under the Credit Agreement from time to time shall constitute part of
the Debt and shall be secured hereby.

               28. REVOLVING CREDIT FACILITY. The Credit Facility is intended to
be a revolving credit facility. Mortgagor shall have the right upon compliance
with the conditions of the Credit Agreement and the other Credit Facility
Documents which pertain to the making of advances under the Credit Facility
(including, without limitation, the requirement that all advances be evidenced
and secured by the Credit Facility Documents and insured under acceptable title
insurance policies) to obtain readvances of amounts from time to time applied
(whether on a mandatory or voluntary basis) in reduction of the outstanding
Principal Balance of the Credit Facility pursuant to the provisions of the
Credit Agreement, or otherwise permitted to be made in accordance with the
provisions of the Credit Agreement or the other Credit Facility Documents
(including, without limitation, any portion of the outstanding Principal Balance
of the Credit Facility which is prepaid in accordance with the provisions of the
Credit Facility Notes and the Credit Agreement).


                                      -10-
<PAGE>   115
               29. BINDING EFFECT. The terms, covenants and provisions of this
Mortgage shall be binding on and shall inure to the benefit of Mortgagor,
Mortgagee, and their respective successors and assigns.

               30. EXCULPATION. No recourse shall be had for any obligation of
BRT under this Mortgage or any of the other Credit Facility Documents or for any
claim based thereon or otherwise in respect thereof, against any past, present
or future trustee, shareholder, officer or employee of BRT, whether by virtue of
any statute or rule of law, or by the enforcement of any assessment or penalty
or otherwise, all such liability being expressly waived and released by each
other party to this Mortgage and the other Credit Facility Documents.

               IN WITNESS WHEREOF, Mortgagor has duly executed and delivered
this Mortgage as of the day and year first above written.


                                  BRANDYWINE OPERATING PARTNERSHIP, L.P., a
                                  Delaware limited partnership

                                  By:    Brandywine Realty Trust, a Maryland
                                         real estate investment trust

                                         By:_________________________________
                                            Name:   Gerard H. Sweeney
                                            Title:  President and Chief
                                                    Executive Officer


                                      -11-
<PAGE>   116
                                    EXHIBIT A

                                  (Definitions)

BOP: The term "BOP" as used in this Mortgage shall mean Brandywine Operating
Partnership, L.P., a Delaware limited partnership.

BRT: The term "BRT" as used in this Mortgage shall mean Brandywine Realty Trust,
a Maryland real estate investment trust.

BRT/BOP Limited Partnerships: The term "BRT/BOP Limited Partnerships" as used in
this Mortgage shall collectively mean LC/N HORSHAM LIMITED PARTNERSHIP, a
Pennsylvania limited partnership; LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a
Pennsylvania limited partnership; NICHOLS LANSDALE LIMITED PARTNERSHIP III, a
Pennsylvania limited partnership; NEWTECH III LIMITED PARTNERSHIP, a
Pennsylvania limited partnership; NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania
limited partnership; C/N OAKLANDS LIMITED PARTNERSHIP I, a Pennsylvania limited
partnership; FIFTEEN HORSHAM, L.P., a Pennsylvania limited partnership; C/N
LEEDOM LIMITED PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN
LIMITED PARTNERSHIP III, a Pennsylvania limited partnership.

Co-Lenders: The term "Co-Lenders" as used in this Mortgage shall mean,
collectively, Smith Barney, NB and all other parties from time to time to whom
direct interests in the Credit Facility are sold, transferred and assigned, and
who are as a result thereof designated as Co-Lenders, under and pursuant to the
provisions of the Credit Agreement and the Co-Lenders Agreement.

Co-Lenders Agreement: The term "Co-Lenders Agreement" as used in this Mortgage
shall mean that certain Co-Lender and Servicing Agreement dated as of the date
hereof between Smith Barney and NB, in its individual capacity and in its
capacity as administrative and documentation agent for the Credit Facility, as
the same may be amended from time to time.

Credit Agreement: The term "Credit Agreement" as used in this Mortgage shall
mean that certain Revolving Credit Agreement dated as of November 25, 1996 among
Smith Barney, NationsBank, N.A., in its individual capacity, BOP, BRT, and the
BRT/BOP Limited Partnership, and NB, acting in its capacity as administrative
and documentation agent for the Credit Facility, as the same may be amended from
time to time, and pursuant to the provisions of which the Credit Facility is
being extended by Co-Lenders to Mortgagor.

Credit Facility: The term "Credit Facility" as used in this Mortgage shall have
the meaning given to such term in paragraph C of the Preliminary Statement of
this Mortgage.

Credit Facility Documents: The term "Credit Facility Documents" as used in this
Mortgage shall have the meaning given to such term in the Credit Agreement.

Credit Facility Notes: The term "Credit Facility Notes" as used in this Mortgage
shall have the meaning given to such term in the Credit Agreement.

Debt: The term "Debt" as used in this Mortgage shall have the meaning given to
such term in paragraph E of the Preliminary Statement of this Mortgage.

Default Rate: The term "Default Rate" as used in this Mortgage shall have the
meaning given to such term in the Credit Agreement.

Events of Default: The term "Events of Default" as used in this Mortgage shall
have the meaning given to such term in the Credit Agreement.
<PAGE>   117
FF&E: The term "FF&E" as used in this Mortgage shall mean, collectively, all
goods (as such term is defined in the Uniform Commercial Code), now owned or
hereafter acquired by Mortgagor, located at or used in connection with the
Improvements and the operation of the Improvements, including, without
limitation, (i) all furniture and furnishings and all other items of personal
property (including inventory now owned or hereafter acquired by Mortgagor) now
and hereafter located on, or used in connection with the operation of the
Improvements, together with all replacements, modifications, alterations and
additions thereto; and (ii) all equipment, fixtures, machinery and other items
of property required or incidental to the use of the Improvements, including all
components thereof, now and hereafter permanently affixed to or incorporated
into the Improvements, including, without limitation, all furnaces, boilers,
heaters, electrical equipment, heating, plumbing, lighting, ventilating,
refrigerating, incineration, air and water pollution control, waste, disposal,
air-cooling and air conditioning systems and apparatus, sprinkler systems and
fire and theft protection equipment, together with all replacements,
modifications, alterations and additions thereto.

***[Ground Lease:  The term "Ground Lease" as used in this Mortgage shall mean
______________.]***

Improvements: The term "Improvements" as used in this Mortgage shall have the
meaning given to such term in the granting clause of this Mortgage.

Leases: The terms "Leases" as used in this Mortgage shall have the meaning given
to such term in the granting clause of this Mortgage.

Principal Balance: The term "Principal Balance" as used in this Mortgage shall
have the meaning given to such term in the Credit Agreement.

Mortgaged Property: The term "Mortgaged Property" as used in this Mortgage shall
have the meaning given to such term in the granting clause of this Mortgage.

Mortgagee: The term "Mortgagee" as used in this Mortgage shall have the meaning
given to such term in the preamble to this Mortgage.

Mortgagor: The term "Mortgagor" as used in this Mortgage shall have the meaning
given to such term in the preamble to this Mortgage.

NB: The term "NB" as used in this Mortgage shall mean NationsBank, N.A., a
national banking association.

Premises: The term "Premises" as used in this Mortgage shall have the meaning
given to such term in paragraph B of the Preliminary Statement of this Mortgage.

Rents: The term "Rents" as used in this Mortgage shall have the meaning given to
such term in the granting clause of this Mortgage.

Smith Barney: The term "Smith Barney" as used in this Mortgage shall mean Smith
Barney Mortgage Capital Group, Inc., a Delaware corporation.

Taxes: The term "Taxes" as used in this Mortgage shall have the meaning given to
such term in the Credit Agreement.

Title Company: The term "Title Company" as used in this Mortgage shall have the
meaning given to such term in the Credit Agreement.

Uniform Commercial Code: The term "Uniform Commercial Code" as used in this
Mortgage shall mean the Uniform Commercial Code of the State in which the
Premises are located.


                                       A-2
<PAGE>   118
                                    Exhibit I










                     BRANDYWINE OPERATING PARTNERSHIP, L.P.,
                   a Delaware limited partnership, as Assignor

                                       and

             NATIONSBANK, N.A., not individually, but acting in its
         capacity as collateral agent for the equal and ratable benefit
                 of the co-lenders described herein, as Assignee






                         -------------------------------

                         ASSIGNMENT OF LEASES AND RENTS

                         -------------------------------



                        Dated: November 25, 1996

                        Location:   __________________
                                    __________________
                                    __________________

                        RECORD AND RETURN TO:


                                Battle Fowler LLP
                                Park Avenue Tower
                                75 East 55th Street
                                New York, New York 10022

                                Attention:  Dean A. Stiffle, Esq.









                                                     MASTER ASSIGNMENT OF LEASES
<PAGE>   119


                         ASSIGNMENT OF LEASES AND RENTS


                        This Assignment of Leases and Rents entered into as of
            the 25th day of November, 1996, by BRANDYWINE OPERATING PARTNERSHIP,
            L.P., a Delaware limited partnership having an office at c/o
            Brandywine Realty Trust, Newtown Square Corporate Campus, 16 Campus
            Boulevard, Suite 150, Newtown Square, Pennsylvania (hereinafter
            referred to as "Assignor"); and NATIONSBANK, N.A., a national
            banking association having an office at 8300 Greensboro Drive,
            McLean, Virginia, not individually, but acting in its capacity as
            administrative and documentation agent for the equal and ratable
            benefit of Co-Lenders pursuant to and in accordance with the terms
            and provisions of the Credit Agreement (NationsBank, N.A. acting in
            such capacity as administrative and documentation agent being
            hereinafter referred to as "Assignee").

                              PRELIMINARY STATEMENT

            A. All capitalized terms as used in this Assignment shall, unless
otherwise defined in this Assignment, have the meanings given to such terms in
EXHIBIT A attached hereto.

            ***[B.  Assignor is the owner of a fee estate in the premises
described in EXHIBIT B attached hereto (hereinafter referred to as the
"Premises");]***

            ***[B. Assignor is the owner of a leasehold estate in the premises
described in EXHIBIT B attached hereto (the "Premises") under and pursuant to
the provisions of the ground lease described in EXHIBIT B-1 attached hereto
(hereinafter referred to as the "Ground Lease");]***

            C. Co-Lenders have on the terms, covenants and provisions set forth
in the Credit Agreement extended to Borrowers a revolving credit facility in the
principal sum of up to, but not in excess of, $80,000,000 (hereinafter referred
to as the "Credit Facility"), which Credit Facility is evidenced by, and payable
together with interest thereon in accordance with the provisions of, the Credit
Facility Notes.

            ***[D. Co-Lenders were willing to extend the Credit Facility to
Assignor only if Assignor assigned to Assignee, for the equal and ratable
benefit of Co-Lenders, in the manner hereinafter provided, as additional
security for the payment of the Debt and the observance and performance by
Borrowers of all of the terms, covenants and provisions of the Credit Facility
Documents on Borrowers' part to be observed and performed, all right, title and
interest of Assignor now owned, or hereafter acquired, in and to (i) all leases,
licenses and other agreements *[(other than the Ground Lease)]* (hereinafter
collectively referred to as the "Leases") now as hereafter entered into and
affecting or relating to the use or occupancy of the Premises or of the
improvements now or hereafter erected thereon (the "Improvements"), and (ii) the
rents, income, revenues, receipts, accounts, accounts receivable, issues and
profits of or derived from or relating to the Premises or the Improvements or
any portion thereof (hereinafter collectively referred to as the "Rents").]***

            ***[D.  Co-Lenders have approved the inclusion of the Premises as
part of the collateral pool for the Credit Facility in accordance with the
provisions of the Credit Agreement, and in connection therewith, and as
<PAGE>   120
consideration therefor, Assignor has agreed to assign to Assignee, for the equal
and ratable benefit of Co-Lenders, in the manner hereinafter provided, as
additional security for the payment of the Debt and the observance and
performance by Borrowers of all of the terms, covenants and provisions of the
Credit Facility Documents on Borrowers' part to be observed and performed, all
right, title and interest of Assignor now owned, or hereafter acquired, in and
to (i) all leases, licenses and other agreements *[(other than the Ground
Lease)]* (hereinafter collectively referred to as the "Leases") now or hereafter
entered into and affecting or relating to the use or occupancy of the Premises
or of the improvements now or hereafter erected thereon (the "Improvements"),
and (ii) the rents, income, revenues, receipts, accounts, accounts receivable,
issues and profits of or derived from or relating to the Premises or the
Improvements or any portion thereof (hereinafter collectively referred to as the
"Rents").]***

            E. NOW, THEREFORE, in consideration of the extension of the Credit
Facility and other good and valuable consideration, the receipt of which is
hereby acknowledged, Assignor hereby assigns to Assignee, as additional security
for the payment of the Debt and the observance and performance by Borrowers of
all of the terms, covenants and provisions of the Credit Facility Documents on
Borrowers' part to be observed or performed, all of Assignor's right, title and
interest now owned, or hereafter acquired, in and to the Leases and the Rents,
and Assignor hereby represents and warrants to and covenants and agrees with
Assignee as follows:

            1. Except as expressly set forth to the contrary in the certified
rent roll for the Property being delivered by Assignor to Assignee in connection
with the execution and delivery of this Assignment, Assignor represents and
warrants that as of the date hereof (i) Assignor is the owner and holder of the
landlord's interest under the Leases, (ii) there are no prior or subordinate
assignments of the Leases or of any portion of the Rents due and payable or to
become due and payable thereunder which are presently outstanding, (iii) all of
the Leases are in full force and effect and the respective terms thereof have
commenced pursuant to the provisions thereof, (iv) the premises demised under
each of the Leases have been completed and the tenants under the Leases have
taken possession of the premises demised thereunder on a rent-paying basis, (v)
neither Assignor nor any tenant under the Leases is in default under any of the
terms, covenants or provisions of the Leases and Assignor knows of no event
which, but for the passage of time or the giving of notice or both, would
constitute an event of default under any of the Leases, (vi) neither Assignor
nor any tenant under the Leases has commenced any action or given or served any
notice for the purpose of terminating any of the Leases, (vii) all Rents due and
payable under the Leases have been paid in full and no such Rents have been paid
more than one (l) month in advance of the due dates thereof, and (viii) there
are no offsets or defenses to the payment of any portion of the Rents.

            2. Assignor shall, at its sole cost and expense, (i) fulfill and
perform, or cause to be fulfilled and performed, each and every term, covenant
and provision of the Leases on the part of the Assignor thereunder to be
observed and performed, (ii) promptly send copies of all notices of default
which Assignor shall send or receive under the Leases to Assignee, (iii) enforce
the observance and performance of the terms and provisions of the Leases by the
tenants thereunder, (iv) enforce the observance and performance of each and
every term, covenant and provision of the Leases on the part of the tenants
thereunder to be observed and performed and (v) appear in and defend any action
or proceeding arising under or in any manner connected with the Leases or with
the obligations and undertakings of the landlord or the tenants thereunder.

            3. Assignor shall not, without the prior consent of Co-Lenders, (i)
further transfer, sell, assign, pledge, encumber or grant a security


                                       -2-
<PAGE>   121
interest in all or any portion of the Rents or the Leases, (ii) accept
prepayments of installments of the Rents for a period of more than one (1) month
in advance, (iii) make or suffer to be made any Lease, including any renewal of
an existing Lease (other than renewals at rents and/on other terms expressly
reserved in such Lease) other than in accordance and in a manner consistent with
the provisions of the Credit Agreement, (iv) consent to or permit the assignment
or subletting of any leasehold estate created under any Lease (other than in
accordance with the express provisions of such Lease), (v) terminate, modify or
amend, or consent to the termination, modification or amendment of, any Lease or
any term thereof other than in accordance and in a manner consistent with the
provisions of the Credit Agreement, (vi) commence or continue proceedings to
evict, remove or dispossess the tenant under any Lease, provided, however, that
Assignor may commence and continue such a proceeding without obtaining the prior
consent of Assignor if the Lease in question does not cover in excess of 20,000
square feet of space in the Improvements and the commencement of such proceeding
is otherwise consistent with customary business practices for the operation of
improvements which are comparable to the Improvements, or (vii) waive, cancel,
release, modify, excuse, condone, set-off, compromise or in any manner release
or discharge the tenant under any Lease other than in a manner which is
consistent with customary business practices for the operation of improvements
comparable to the Improvements.

            4. This Assignment shall not be deemed or construed to obligate
Assignee or any Co-Lender to take any action or incur any expense or perform or
discharge any obligation, duty or liability under the Leases, and Assignor
hereby agrees to indemnify and hold Assignee and Co-Lenders harmless from and
against all liability, loss or damage, including, but not limited to, reasonable
attorneys' fees, which Assignee or any Co-Lender may or might incur under the
Leases or under or by reason of this Assignment and from and against any and all
claims whatsoever which may be asserted against Assignee or any Co-Lender by
reason of any alleged obligation or undertaking on the part of Assignee or any
Co-Lender to perform or discharge any of the terms, covenants or provisions
contained in the Leases.

            5. This Assignment has been made as additional security for the
payment of the Debt and the observance and performance by Borrowers of the
terms, covenants and provisions of the Credit Facility Documents on Borrowers'
part to be observed and performed. Subject to the provisions of this Assignment
hereinafter set forth, Assignee waives the right to enter the Premises for the
purpose of collecting the Rents, and grants Assignor the right to collect the
Rents. Assignor shall collect and hold the Rents, or an amount sufficient to
discharge all current sums due on the Debt, in trust for use in the payment of
the Debt. The right of Assignor to collect the Rents may be revoked by Assignee
upon the occurrence of any Event of Default, by giving notice of such revocation
to Assignor. Following such notice and as long as such Event of Default is
continuing (it being understood that the decision whether or not to accept the
cure of an Event of Default shall be in the sole and absolute discretion of
Assignee), Assignee may retain and apply the Rents toward payment of the Debt in
such order, priority and proportions as Assignee in its discretion, shall deem
proper, or to the operation, maintenance and repair of the Property, and
irrespective of whether Assignee shall have declared the Debt to be immediately
due and payable, or shall have commenced a foreclosure of the Mortgage or shall
have applied or arranged for the appointment of a receiver. In addition,
Assignee shall have the absolute and unconditional right following the
occurrence and during the continuance of an Event of Default, to notify the
tenants under the Leases that all Rents should be paid directly to Assignee.
Upon the occurrence and during the continuance of an Event of Default, the
tenants under the Leases shall, upon notice from Assignee of the occurrence of
such Event of Default, thereafter pay to Assignee or to any appointed receiver
the Rents due or to become due under the Leases without any obligation to
determine whether or not such Event


                                       -3-
<PAGE>   122
of Default does in fact exist, and Assignor shall facilitate in all reasonable
ways the collection of the Rents by Assignee, and without implying the necessity
therefor will, upon demand of Assignee, execute written notices to the tenants
under the Leases directing the tenants under the Leases to pay the Rents to
Assignee, which Rents may, during the continuance of such Event of Default, be
retained and applied by Assignee toward the payment of the Debt in such order,
priority and proportions as Assignee in its discretion, shall deem proper, or to
the operation, maintenance and repair of the Property.

            6. Upon the occurrence of an Event of Default and for so long as
such Event of Default continues Assignee shall have the right, at its option, to
enter upon and take over and assume the management, operation and maintenance of
the Property and to perform all necessary and proper acts and to expend such
sums out of the income of the Property as may be necessary in connection
therewith, in the same manner and to the same extent as Assignor theretofore
might do, including the right to effect new Leases, cancel or surrender the
Leases, alter, modify or amend the provisions thereof, or make concessions to
the tenants thereunder and Assignor hereby releases and waives all claims
against Assignee arising out of such management, operation and maintenance.
Assignor shall, from time to time, at its expense, execute, deliver, file and
record any statement, assignment, instrument, document, agreement or other paper
and take any other action (including any filings of financing or continuation
statements under the Uniform Commercial Code) that from time to time may be
necessary or desirable, or that Assignee may reasonable request, in order to
create, preserve, perfect, confirm or validate the assignment of the Leases and
Rents made pursuant to the provisions of this Assignment or to enable Assignee
to obtain the full benefits of this Assignment, or to enable Assignee to
exercise and enforce any of its rights, powers and remedies hereunder. To the
extent permitted by applicable law, Assignor hereby authorizes Assignee, and
appoints Assignee as its true and lawful attorney (with full power of
substitution, in the name of Assignor), to execute and file financing statements
or continuation statements without Assignor's signature appearing thereon.

            7. Nothing contained in this Assignment, and no entry by Assignee
upon the Property as hereinabove provided, shall be construed as to constitute
Assignee as a mortgagee in possession.

            8. Nothing contained in this Assignment is intended or shall be
construed to prevent Assignee in the exercise of its discretion from foreclosing
the Mortgage or otherwise enforcing the provisions thereof or of any of the
other Credit Facility Documents, in whole or in part, in accordance with their
terms.

            9. No alteration, extension, renewal, change, modification, release,
amendment, compromise or cancellation, in whole or in part, of any term,
covenant or provision of any of the other Credit Facility Documents shall affect
this Assignment in any manner or diminish or release any of the rights of
Assignee hereunder.

            10. Assignor hereby waives any and all legal requirements that
Assignee institute any action or proceeding in law or in equity against any
other party, or exhaust its remedies under any of the other Credit Facility
Documents as a condition precedent to exercising its rights and remedies under
this Assignment. All remedies afforded to Assignee by reason of this Assignment
are separate and cumulative remedies and it is agreed that no one of such
remedies whether exercised by Assignee or not, shall be deemed to be in
exclusion of any of the other remedies available to Assignee and shall not in
any manner limit or prejudice any other legal or equitable remedies which
Assignee may have, including, but not limited to, all rights and remedies of
Assignee under any of the other Credit Facility Documents.


                                       -4-
<PAGE>   123
            11. It is the intention of the parties hereto that any and all other
Leases affecting the Property or any portion thereof presently in effect or
hereafter entered into by Assignor or in which Assignor shall otherwise have an
interest shall be covered by the provisions of this Assignment and all such
Leases and all of Assignor's right, title and interest in all such Leases, and
the rents, additional rents, charges, issues, profits and other sums payable
thereunder, are hereby assigned to Assignee until the end of the respective
terms thereof and any renewals or extensions thereof, subject to all of the
terms, covenants and provisions of this Assignment. Assignor shall deliver a
true and correct copy of each such Lease to Assignee promptly after the
execution and delivery of the same. Assignor shall, upon the request of
Assignee, execute and deliver in recordable form all instruments which Assignee
may reasonably request to further evidence and confirm such assignment of each
such Lease.

            12. This Assignment shall be binding upon Assignor, and its
successors and assigns and shall inure to the benefit of Assignee, and its
successors and assigns.

            13. This Assignment may only be modified, altered, amended, or
terminated by an agreement in writing executed by the parties hereto.

            14. Any notice, request, demand, statement or consent made hereunder
or in connection herewith shall be in writing and shall be sent in the manner
specified in the Credit Agreement.

            15. If any term, covenant or condition of this Assignment shall be
held to be invalid, illegal or unenforceable in any respect, this Assignment
shall be construed without such provision.

            16. This Assignment shall be governed by and construed under the
laws of the State in which the Property is located.

            18. No recourse shall be had for any obligation of BRT under this
Assignment or any of the other Credit Facility Documents or for any claim based
thereon or otherwise in respect thereof, against any past, present or future
trustee, shareholder, officer or employee of BRT, whether by virtue of any
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, all such liability being expressly waived and released by each other
party to this Assignment and the other Credit Facility Documents.


                                       -5-
<PAGE>   124
            IN WITNESS WHEREOF, Assignor has duly executed this Assignment as of
the day and year first above written.


                                    BRANDYWINE OPERATING PARTNERSHIP, L.P., a
                                    Delaware limited partnership

                                    By:   Brandywine Realty Trust, a Maryland
                                          real estate investment trust

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                       -6-
<PAGE>   125
                                    EXHIBIT A
                                  (Definitions)


Assignee: The term "Assignee" as used in this Assignment shall have the meaning
given to such term in the preamble to this Agreement.


Assignor: The term "Assignor" as used in this Assignment shall have the meaning
given to such term in the preamble to this Agreement.


Approved Leasing Parameters: The term "Approved Leasing Parameters" as used in
this Assignment shall have the meaning given to such term in the Credit
Agreement.


BOP: The term "BOP" as used in this Agreement shall mean Brandywine Operating
Partnership, L.P., a Delaware limited partnership.


Borrowers: The term "Borrowers" as used in this Assignment shall collectively
mean BRT, BOP and the BRT/BOP Limited Partnerships.

BRT: The term "BRT" as used in this Assignment shall mean Brandywine Realty
Trust, a Maryland real estate investment trust.

BRT/BOP Limited Partnerships: The term "BRT/BOP Limited Partnerships" as used in
this Assignment shall mean LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania
limited partnership; LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a Pennsylvania
limited partnership; NICHOLS LANSDALE LIMITED PARTNERSHIP III, a Pennsylvania
limited partnership; NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania limited partnership;
C/N OAKLANDS LIMITED PARTNERSHIP I, a Pennsylvania limited partnership; FIFTEEN
HORSHAM, L.P., a Pennsylvania limited partnership; C/N LEEDOM LIMITED
PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN LIMITED
PARTNERSHIP III, a Pennsylvania limited partnership.

Co-Lenders: The term "Co-Lenders" as used in this Assignment shall collectively
mean, Smith Barney Mortgage Capital Group, Inc., and NationsBank, N.A., acting
in its individual capacity, and all other parties from time to time to whom
direct interests in the Credit Facility are sold, transferred and assigned, and
who are as a result thereof are designated as Co-Lenders under and pursuant to
the provisions of the Credit Agreement and the Co-Lenders Agreement

Co-Lenders Agreement: The term "Co-Lenders Agreement" as used in this Assignment
shall mean that certain Co-Lender and Servicing Agreement dated as of November
25, 1996 among Smith Barney Mortgage Capital Group, Inc., NationsBank, N.A.,
acting in its individual capacity, and NationsBank, N.A., acting in its capacity
as administrative and documentation agent for the equal and ratable benefit of
Co-Lenders in accordance with the provisions of the Credit Agreement, as the
same may be further amended from time to time.

Credit Agreement: The term "Credit Agreement" as used in this Assignment shall
mean that certain Revolving Credit Agreement dated as of November 25, 1996 among
Smith Barney Mortgage Capital Group, Inc., NationsBank, N.A., acting in its
individual capacity, Borrowers and NationsBank, N.A., acting in its capacity as
administrative and documentation agent for the equal and ratable benefit of
Co-Lenders, as the same may be amended from time to time, and pursuant to the
provisions of which the Credit Facility is being extended by Co-Lenders to
Borrowers.
<PAGE>   126
Credit Facility: The term "Credit Facility" as used in this Assignment shall
have the meaning given to such term in paragraph C of the Preliminary Statement
of this Assignment.

Credit Facility Note: The term "Credit Facility Note" as used in this Assignment
shall have the meaning given to such term in the Credit Agreement.

Credit Facility Documents: The term "Credit Facility Documents" as used in this
Assignment shall have the meaning given to such term in the Credit Agreement.

Debt:  The term "Debt" as used in this Assignment shall have the meaning given
to such term in the Credit Agreement.

Event of Default: The term "Event of Default" as used in this Assignment shall
have the meaning given to such term in the Credit Agreement.

***[Ground Lease.  The term "Ground Lease" as used in this Assignment shall
mean _______________________________.]***

Improvements: The term "Improvements" as used in this Assignment shall have the
meaning given to such term in paragraph D of the Preliminary Statement of this
Assignment.

Leases: The term "Leases" as used in this Assignment shall have the meaning
given to such term in paragraph D of the Preliminary Statement of this
Assignment.

Mortgage: The term "Mortgage" as used in this Assignment shall mean ***[that
certain Mortgage dated as of the date hereof given by Assignor to Assignee OR
ALTERNATIVELY that certain Deed of Trust dated as of the date hereof given by
Assignor to _________, as trustee, for this use and benefit of Assignee]***, as
security for the payment of the Debt and the observance and performance by
Borrowers of the terms, covenants and provisions of the Credit Facility Document
on Borrowers' part to be observed and performed, and encumbering Assignor's
right, title and interest in and to the Property and intended to be duly
recorded in the office of the _______ of ______ County, __________.

Property: The term "Property" as used in this Assignment shall collectively mean
the Premises and the Improvements.

Premises: The term "Premises" as used in this Assignment shall have the meaning
given to such term in paragraph B of the Preliminary Statement of this
Assignment.

Rents: The term "Rents" as used in this Assignment shall have the meaning given
to such term in paragraph D of the Preliminary Statement of this Assignment.


                                       A-2
<PAGE>   127
                                    EXHIBIT J

                               GUARANTY OF PAYMENT


                  This Guaranty entered into as of the 25th day of November,
      1996, among WITMER OPERATING PARTNERSHIP, L.P. ("WOP"), a Delaware general
      partnership; BRANDYWINE REALTY PARTNERS, a Pennsylvania general
      partnership ("BRP"); BRANDYWINE REALTY SERVICES CORPORATION ("BRSC"), a
      Pennsylvania corporation (WOP, BRP and BRSC are hereinafter collectively
      referred to as "Guarantors"); and NATIONSBANK, N.A., a national banking
      association having an office at 8300 Greensboro Drive, McLean, Virginia,
      in its capacity as administrative and documentation agent for the equal
      and ratable benefit of Co-Lenders pursuant to and in accordance with the
      terms and provisions of the Credit Agreement (NationsBank, N.A., acting in
      such capacity as administrative and documentation agent being hereinafter
      referred to as "Agent").

                              PRELIMINARY STATEMENT

            A. All capitalized terms as used in this Guaranty shall, unless
otherwise defined in this Guaranty, have the meanings given to such terms in
Exhibit A attached hereto.

            B. The Initial Co-Lenders have agreed on the terms, covenants and
provisions of the Credit Agreement to extend to Borrowers a revolving credit
facility in the principal sum of up to, but not in excess of, $80,000,000 (the
"Credit Facility"), which Credit Facility shall be evidenced by the Credit
Facility Notes and secured inter alia by the Mortgages.

            C. The Initial Co-Lenders were willing to extend the Credit Facility
to Borrowers only if Guarantors execute and deliver this Guaranty and guarantee
payment in full of the Debt to Agent, for the equal and ratable benefit of
Co-Lenders.

            NOW, THEREFORE, in consideration of Ten Dollars ($10.00) and other
good and valuable consideration, the receipt of which is hereby acknowledged,
and to induce Initial Co-Lenders to extend the Credit Facility, Guarantors
hereby represent and warrant to and covenant and agree with Agent, for the equal
and ratable benefit of Co-Lenders, as follows:

            1. Guarantors hereby guarantee, absolutely and unconditionally, to
Agent, for the equal and ratable benefit of Co-Lenders, the payment in full of
the Debt.

            2. Guarantors agree that, with or without notice or demand,
Guarantors will reimburse Agent, to the extent that such reimbursement is not
made by Borrowers, for all costs and expenses (including, without limitation,
reasonable attorney's fees) incurred by Agent or any Co-Lender in connection
with the collection of the Debt or any portion thereof or in any action, case or
proceeding brought by Agent to enforce the obligations of Guarantors under this
Guaranty.

            3. All moneys available to Agent for application in payment or
reduction of the Debt may be applied by Agent in such manner and in such amounts
and at such time or times and in such order, priority and proportions as Agent
may see fit to the payment or reduction of such portion of the Debt as Agent may
elect.

            4. Guarantors hereby consent that from time to time, before or after
any default by Borrowers, with or without further notice to or assent from
Guarantors, any security at any time held by or available to Agent or any
Co-Lender for any obligation of Borrowers, or any security at any time held by
or available to Agent or any Co-Lender for any obligation of any other person
<PAGE>   128
or party secondarily or otherwise liable for all or any portion of the Debt, may
be exchanged, surrendered or released and any obligation of Borrowers, or of any
such other person or party, may be changed, altered, renewed, extended,
continued, surrendered, compromised, waived or released in whole or in part, or
any default with respect thereto waived, and Agent or any Co-Lender may fail to
set off and may release, in whole or in part, any balance of any deposit account
or credit on its books in favor of Borrowers, or of any such other person or
party, and may extend further credit in any manner whatsoever to Borrowers, and
generally deal with Borrowers or any such security or other person or party as
Agent or such Co-Lender may see fit; and Guarantors shall remain bound under
this Guaranty notwithstanding any such exchange, surrender, release, change,
alteration, renewal, extension, continuance, compromise, waiver, inaction,
extension of further credit or other dealing.

            5. Guarantors hereby waive (a) notice of acceptance of this Guaranty
and of the extension of the Credit Facility and of the making of any advance
thereof pursuant to the Credit Facility Documents; (b) presentment and demand
for payment of the Debt or any portion thereof; (c) protest and notice of
dishonor or default to Guarantors or to any other person or party with respect
to the Debt or any portion thereof; (d) all other notices to which Guarantors
might otherwise be entitled except as otherwise specifically provided to the
contrary herein; and (e) any demand for payment under this Guaranty.

            6. This Guaranty is a guaranty of payment and not of collection and
Guarantors further waive any right to require that any action, case or
proceeding be brought against Borrowers or any other person or party or to
require that resort be had to any security or to any balance of any deposit
account or credit on the books of Agent or any Co-Lender in favor of Borrowers
or any other person or party.

            7. Each reference herein to Agent or Co-Lenders shall be deemed to
include their respective successors and assigns, in whose favor the provisions
of this Guaranty shall also inure. Each reference herein to Guarantors shall be
deemed to include the successors and assigns of Guarantors, all of whom shall be
bound by the provisions of this Guaranty, provided, however, that Guarantors
shall in no event or under any circumstance have the right without obtaining the
prior written consent of Agent to assign or transfer their respective
obligations and liabilities under this Guaranty, in whole or in part, to any
other person, party or entity.

            8. The term "Guarantors" as used herein shall mean the "Guarantors
and each of them" and each undertaking herein contained shall be their joint and
several undertaking, provided, however, that in the next succeeding paragraph
hereof the term "Guarantors" shall mean the "Guarantors or any of them".

            9. No delay on the part of Agent in exercising any right or remedy
under this Guaranty or failure to exercise the same shall operate as a waiver in
whole or in part of any such right or remedy. No notice to or demand on
Guarantors shall be deemed to be a waiver of the obligation of Guarantors or of
the right of Agent to take further action without notice or demand as provided
in this Guaranty.

            10. This Guaranty may only be modified, amended, changed or
terminated by an agreement in writing signed by Agent and Guarantors. No waiver
of any term, covenant or provision of this Guaranty shall be effective unless
given in writing by Agent and if so given by Agent shall only be effective in
the specific instance in which given.

            11. Guarantors acknowledge that this Guaranty and Guarantors'
obligations under this Guaranty are and shall at all times continue to be


                                       -2-
<PAGE>   129
absolute and unconditional in all respects, and shall at all times be valid and
enforceable irrespective of (a) any other agreements or circumstances of any
nature whatsoever which might otherwise constitute a defense (other than a
defense of payment) to this Guaranty and the obligations of Guarantors under
this Guaranty or the obligations of Borrowers or any other person or party
relating to this Guaranty or the obligations of Guarantors hereunder or
otherwise with respect to the Credit Facility, including, but not limited to,
the realization by Agent or any Co-Lender upon any collateral given, pledged or
assigned as security for all or any portion of the Debt, or the filing of a
petition or the commencement of a case with respect to any Borrower or any
Guarantor under Title 11 of the United States Code, as now constituted or
hereafter amended (the "Bankruptcy Code"), or under any other applicable Federal
or state bankruptcy, insolvency or similar law, or the obtaining by Agent or any
Co-Lender of title to any collateral given, pledged or assigned as security for
the Debt, by foreclosure or enforcement of Agent's or any Co-Lender's lien
thereon, acceptance of an assignment or deed in lieu of foreclosure or sale, or
otherwise, or (b) any modification, impairment, abatement, reduction, release,
limitation, restructure, reinstatement or cure, in whole or part, of interest,
principal or other sum payable by Borrowers under the Credit Agreement, the
Credit Facility Notes, the Mortgages or the other Credit Facility Documents or
of any other obligation of Borrowers under the Credit Facility Documents
pursuant to an order by a bankruptcy court or other court of competent
jurisdiction in any action, case or proceeding brought under the Bankruptcy Code
or under any other applicable Federal or state bankruptcy, insolvency or similar
law, it being expressly acknowledged and agreed by Guarantors that if any such
modification, impairment, abatement, reduction, release, limitation,
restructure, reinstatement or cure, in whole or part, is so ordered in any such
action, case or proceeding, Guarantors' obligations under this Guaranty will
nevertheless continue to be determined as if such order had not been issued
(i.e., as if Borrowers was still obligated to pay interest, principal and other
sums and to otherwise perform and observe its other obligations strictly in
accordance with the terms, covenants and provisions of the Credit Agreement, the
Credit Facility Notes, the Mortgages and the other Credit Facility Documents as
in existence prior to the issuance of any such order). Guarantors absolutely,
unconditionally and irrevocably waive any and all right to assert any defense,
setoff, counterclaim or crossclaim of any nature whatsoever with respect to this
Guaranty or the obligations of Guarantors under this Guaranty or the obligations
of Borrowers or any other person or party relating to this Guaranty or the
obligations of Guarantors hereunder or otherwise with respect to the Credit
Facility in any action, case or proceeding brought by Agent or Co-Lenders to
collect the Debt, or any portion thereof, or to enforce the obligations of
Guarantors under this Guaranty (provided, however, that the foregoing provisions
of this sentence shall not be deemed a waiver of the right of the Guarantors to
assert any compulsory counterclaim in any such action, case or proceeding
brought by Agent or Co-Lenders in any state court if such counterclaim is
compelled under local law or rule or procedure, or in any such action, case or
proceeding brought by Agent or Co-Lenders in a court of the United States, nor
shall the foregoing provisions of this sentence be deemed a waiver of the right
of the Guarantors to assert any claim which would otherwise constitute a
defense, setoff, counterclaim or crossclaim of any nature whatsoever against
Agent or Co-Lenders in any separate action, case or proceeding brought by the
Guarantors against Agent or Co-Lenders). Guarantors acknowledge that no oral or
other agreements, understandings, representations or warranties exist with
respect to this Guaranty or with respect to the obligations of Guarantors under
this Guaranty, except those specifically set forth in this Guaranty, and that
this Guaranty sets forth the entire agreement and understanding of Agent,
Co-Lenders and Guarantors.

            12. GUARANTORS HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE, AND
AGENT AND CO-LENDERS BY THEIR ACCEPTANCE OF THIS GUARANTY IRREVOCABLY AND
UNCONDITIONALLY WAIVE, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, CASE,


                                       -3-
<PAGE>   130
PROCEEDING, SUIT OR COUNTERCLAIM ARISING IN CONNECTION WITH, OUT OF OR OTHERWISE
RELATING TO THIS GUARANTY.

            13. Notwithstanding any payments made by Guarantors pursuant to the
provisions of this Guaranty, Guarantors shall not seek to enforce or collect
upon any rights which Guarantors now have or may acquire against Borrowers
either by way of subrogation, indemnity, reimbursement or contribution for any
amount paid under this Guaranty, nor shall Guarantors file, assert or receive
payment on any claim, whether now existing or hereafter arising, against
Borrowers subsequent to the commencement of a case by or against Borrowers under
the Bankruptcy Code or under any other applicable Federal or state bankruptcy,
insolvency or similar law, in each case unless and until the Debt has been paid
in full and provided that no such action by Guarantors could, in the reasonable
opinion of Agent and its counsel, result in the "preference" period (as set
forth in Section 547(b)(4) of the Bankruptcy Code or any successor provision)
with respect to any payment or other transfer of assets to Agent or to any
Co-Lender from or on behalf of Borrowers being held to be longer than such
period would have been held to be if Guarantors had not taken such action. In
the event an action, case or proceeding is filed or commenced under the
Bankruptcy Code or under any other applicable Federal or state bankruptcy,
insolvency or similar law in regard to Borrowers or an action, case or
proceeding is otherwise commenced for the benefit of the creditors of Borrowers,
this Guaranty shall at all times thereafter remain effective in regard to any
payments or other transfers of assets to Agent or any Co-Lender received from or
on behalf of Borrowers which are held voidable on the grounds of preference,
fraudulent conveyance or otherwise, whether or not the Debt has been paid in
full.

            14. If at any time any payment, or portion thereof, made by, or for
the account of, Guarantors on account of the obligations under this Guaranty, is
set aside by any court or trustee having jurisdiction as a voidable preference,
fraudulent conveyance or otherwise as being subject to avoidance or recovery
under the provisions of the Bankruptcy Code or under any other applicable
Federal or state bankruptcy, insolvency or similar law, Guarantors hereby agree
that this Guaranty (a) shall continue and remain in full force and effect, or
(b) if previously terminated as a result of Guarantors having fulfilled
Guarantors' obligations hereunder in full or as a result of Agent having
released Guarantors from Guarantors' obligations and liabilities hereunder,
shall without further act or instrument be reinstated and shall thereafter
remain in full force and effect, in either case with the same force and effect
as though such payment or portion thereof had not been made, and if applicable,
as if such previous termination had not occurred.

            15. Any notice, request or demand given or made under this Guaranty
shall be in writing and shall be sent by Federal Express or other reputable
national courier service or by postage prepaid registered or certified mail,
return receipt requested, and shall be deemed given (i) when received at the
following addresses if sent by Federal Express or other reputable national
courier service, and (ii) three (3) business days after being postmarked and
addressed as follows if sent by registered or certified mail, return receipt
requested:

                  If to Agent:

                        NationsBank, N.A.
                        Real Estate Banking
                        8300 Greensboro Drive
                        McLean, Virginia 22102-3604
                        Attention:  Gary P.F. Carr
                                    Vice President


                                       -4-
<PAGE>   131
                  With copies to:

                        Cadwalader, Wickersham & Taft
                        201 South College Street - Suite 1510
                        Charlotte, South Carolina 28244
                        Attention: James P. Carroll, Esq.

                  and

                        Battle Fowler LLP
                        Park Avenue Tower
                        75 East 55th Street
                        New York, New York 10022
                        Attention: Dean A. Stiffle, Esq.

                  If to Guarantors:

                        c/o Brandywine Realty Trust
                        Newtown Square Corporate Campus
                        16 Campus Boulevard, Suite 150
                        Newtown Square, Pennsylvania 19073
                        Attention: Gerard H. Sweeney
                                   President and Chief Executive Officer

                  With a copy to:

                        Pepper, Hamilton & Scheetz
                        3000 Two Logan Square
                        Eighteenth and Arch Streets
                        Philadelphia, Pennsylvania 19103-2799
                        Attention: Michael H. Friedman, Esq.


Each party to this Guaranty may designate a change of address by notice given to
the other parties fifteen (15) days prior to the date such change of address is
to become effective.

            16. This Guaranty is, and shall be deemed to be, a contract entered
into under and pursuant to the laws of the State of New York and shall be in all
respects governed, construed, applied and enforced in accordance with the laws
of the State of New York. No defense given or allowed by the laws of any other
state or country shall be interposed in any action, case or proceeding hereon
unless such defense is also given or allowed by the laws of the State of New
York.

            17. No exculpatory provisions contained in the Credit Facility
Documents shall in any event or under any circumstance be deemed or construed to
modify, qualify, or affect in any manner whatsoever the personal recourse
obligations and liabilities of Guarantors under this Guaranty.

            18. Guarantors agree to submit to personal jurisdiction in the State
of New York in any action, case or proceeding arising out of this Guaranty and,
in furtherance of such agreement, Guarantors hereby agree and consent that
without limiting other methods of obtaining jurisdiction, personal jurisdiction
over Guarantors in any such action, case or proceeding may be obtained within or
without the jurisdiction of any court located in New York and that any process
or notice of motion or other application to any such court in connection with
any such action, case or proceeding may be served upon Guarantors by registered
or certified mail to or by personal service at the last known addresses of
Guarantors, whether such addresses be within or without the jurisdiction of any
such court. Guarantors also agree that the venue of any litigation arising in
connection with the Debt or in respect of


                                       -5-
<PAGE>   132
any of the obligations of Guarantors under this Guaranty shall, to the extent
permitted by law, be in New York County, New York.

            19. The obligations and liabilities of Guarantors under this
Guaranty are in addition to the obligations and liabilities of Guarantors under
the Other Guaranties (as hereinafter defined). The discharge of Guarantors'
obligations and liabilities under any one or more of the Other Guaranties by
Guarantors or by reason of operation of law or otherwise shall in no event or
under any circumstance constitute or be deemed to constitute a discharge, in
whole or in part, of Guarantors' obligations and liabilities under this
Guaranty. Conversely, the discharge of Guarantors' obligations and liabilities
under this Guaranty by Guarantors or by reason of operation of law or otherwise
shall in no event or under any circumstance constitute or be deemed to
constitute a discharge, in whole or in part, of Guarantors' obligations and
liabilities under any of the Other Guaranties. The term "Other Guaranties" as
used herein shall mean any other guaranty of payment, guaranty of performance,
completion guaranty, indemnification agreement or other guaranty or instrument
of personal recourse obligation or undertaking of any nature whatsoever (other
than this Guaranty) now or hereafter executed and delivered by Guarantors to
Agent or Co-Lenders or any of them in connection with the Credit Facility.

            20. This Guaranty may be executed in one or more counterparts by
some or all of the parties hereto, each of which counterparts shall be an
original and all of which together shall constitute a single agreement of
guaranty. The failure of any party listed below to execute this Guaranty, or any
counterpart hereof, shall not relieve the other signatories from their
obligations hereunder.

            21. No recourse shall be had for any obligation of BRT under this
Guaranty or for any claim based thereon or otherwise in respect thereof, against
any past, present or future trustee, shareholder, officer or employee of BRT,
whether by virtue of any statute or rule of law, or by the enforcement of any
assessment or penalty or otherwise, all such liability being expressly waived
and released by each other party to and beneficiary of this Guaranty.

            22. No personal recourse shall be had for any obligation of BRP
under this Guaranty or for any claim based thereon or otherwise in respect
thereof, against Brandywine Specified Property Investors Limited Partnership, a
Pennsylvania limited partnership and one of the general partners of BRP, whether
by virtue of any statute or rule of law, or by the enforcement of any assessment
or penalty or otherwise, all such liability being expressly waived and released
by each other party to and beneficiary of this Guaranty and by each of the other
general partners of BRP.


                                       -6-
<PAGE>   133
            IN WITNESS WHEREOF, Guarantors have duly executed and delivered this
Guaranty to Agent as of the day and year first above set forth.


                              WITMER OPERATING PARTNERSHIP, L.P., a Delaware
                              limited partner

                              By:   Brandywine Holdings I, Inc., a
                                    Pennsylvania corporation, its general
                                    partner

                                    By:   ______________________________
                                          Name:   Gerard H. Sweeney
                                          Title:  President and Chief
                                                  Executive Officer

                              BRANDYWINE REALTY PARTNERS, a Pennsylvania
                              general partnership

                              By:   Brandywine Realty Trust, a Maryland real
                                    estate investment trust, its general
                                    partner

                                    By:   ______________________________
                                          Name:   Gerard H. Sweeney
                                          Title:  President and Chief
                                                  Executive Officer

                              BRANDYWINE REALTY SERVICES CORPORATION, a
                              Pennsylvania corporation

                              By:   ______________________________
                                    Name:   Gerard H. Sweeney
                                    Title:  President and Chief
                                            Executive Officer


                                       -7-
<PAGE>   134
                                    EXHIBIT A
                                  (DEFINITIONS)



Agent: The term "Agent" as used in this Guaranty shall have the meaning given to
such term in the preamble to this Guaranty.

BOP: The term "BOP" as used in this Guaranty shall mean Brandywine Operating
Partnership, L.P., a Delaware Limited partnership.

Borrowers: The term "Borrowers" as used in this Guaranty shall mean collectively
BRT, BOP and the BRT/BOP Limited Partnership.

BRT: The term "BRT" as used in this Guaranty shall mean Brandywine Realty Trust,
a Maryland real estate investment trust.

BRT/BOP Limited Partnership: The term "BRT/BOP Limited Partnership" as used in
this Guaranty shall mean LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania
limited partnership; LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a Pennsylvania
limited partnership; NICHOLS LANSDALE LIMITED PARTNERSHIP III, a Pennsylvania
limited partnership; NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania limited
partnership; NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania limited partnership;
C/N OAKLANDS LIMITED PARTNERSHIP I, a Pennsylvania limited partnership; FIFTEEN
HORSHAM, L.P., a Pennsylvania limited partnership; C/N LEEDOM LIMITED
PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN LIMITED
PARTNERSHIP III, a Pennsylvania limited partnership.

Co-Lenders: The term "Co-Lenders" as used in this Guaranty shall mean the
Initial Co-Lenders and all other parties from time to time to whom direct
interests in the Credit Facility are sold, transferred and assigned, and who are
as a result thereof designated as Co-Lenders, under and pursuant to the
provisions of the Credit Agreement and the Co-Lenders Agreement.

Co-Lenders Agreement: The term "Co-Lenders Agreement" as used in this Guaranty
shall mean that certain Co-Lender and Servicing Agreement dated as of the date
hereof among Smith Barney Mortgage Capital Group, Inc., NationsBank, N.A., in
its individual capacity, and NationsBank, N.A., in its capacity as Agent.

Credit Agreement: The term "Credit Agreement" as used in this Guaranty shall
mean that certain Revolving Credit Agreement dated as of the date hereof among
Smith Barney Mortgage Capital Group, Inc., NationsBank, N.A., in its individual
capacity, Borrowers and NationsBank, N.A., in its capacity as Agent and pursuant
to the provisions of which the Credit Facility is being extended by Co-Lenders
to Borrowers.

Credit Facility: The term "Credit Facility" as used in this Guaranty shall have
the meaning given to such term in paragraph B of the Preliminary Statement of
this Guaranty.

Credit Facility Documents: The term "Credit Facility Documents" as used in this
Guaranty shall have the meaning given to such term in the Credit Agreement.

Credit Facility Notes: The term "Credit Facility Notes" as used in this Guaranty
shall have the meaning given to such term in the Credit Agreement.

Debt: The term "Debt" as used in this Guaranty shall have the meaning given to
such term in the Credit Agreement.


                                       A-1
<PAGE>   135
Guarantors: The term "Guarantors" as used in this Guaranty shall have the
meaning given to such term in the preamble to this Guaranty.

Initial Co-Lenders: The term "Initial Co-Lenders" as used in this Guaranty shall
mean collectively Smith Barney Mortgage Capital Group, Inc., and NationsBank,
N.A.

Mortgages: The term "Mortgages" as used in this Guaranty shall have the meaning
given to such term in the Credit Agreement.

Other Guaranties: The term "Other Guaranties" as used in this Guaranty shall
have the meaning given to such term in paragraph 19 of this Guaranty.


                                       A-2
<PAGE>   136
                                    EXHIBIT K



                               HAZARDOUS MATERIAL
                                  GUARANTY AND
                            INDEMNIFICATION AGREEMENT


                  This Guaranty and Indemnification Agreement entered into as of
      the 25th day of November, 1996, among BRANDYWINE REALTY TRUST ("BRT"), a
      Maryland real estate investment trust; BRANDYWINE OPERATING PARTNERSHIP,
      L.P. ("BOP), a Delaware limited partnership, LC/N HORSHAM LIMITED
      PARTNERSHIP, a Pennsylvania limited partnership; LC/N KEITH VALLEY LIMITED
      PARTNERSHIP I, a Pennsylvania limited partnership; NICHOLS LANSDALE
      LIMITED PARTNERSHIP III, a Pennsylvania limited partnership; NEWTECH III
      LIMITED PARTNERSHIP, a Pennsylvania limited partnership; NEWTECH IV
      LIMITED PARTNERSHIP, a Pennsylvania limited partnership; C/N OAKLANDS
      LIMITED PARTNERSHIP I, a Pennsylvania limited partnership; FIFTEEN
      HORSHAM, L.P., a Pennsylvania limited partnership; C/N LEEDOM LIMITED
      PARTNERSHIP II, a Pennsylvania limited partnership; C/N IRON RUN LIMITED
      PARTNERSHIP III, a Pennsylvania limited partnership (collectively the
      "BRT/BOP Limited Partnerships") (BRT, BOP and the BRT/BOP Limited
      Partnerships are hereinafter collectively referred to as "Borrowers");
      WITMER OPERATING PARTNERSHIP, L.P. ("WOP"), a Delaware limited
      partnership; BRANDYWINE REALTY PARTNERS, a Pennsylvania general
      partnership ("BRP"); BRANDYWINE REALTY SERVICES CORPORATION ("BRSC"), a
      Pennsylvania corporation (BRT, BOP, the BRT/BOP Limited Partnerships, WOP,
      BRP and BRSC are hereinafter collectively referred to as "Guarantors");
      and NATIONSBANK, N.A., a national banking association having an office at
      8300 Greensboro Drive, McLean, Virginia in its capacity as administrative
      and documentation agent for the equal and ratable benefit of Co-Lenders
      pursuant to and in accordance with the terms and provisions of the Credit
      Agreement (NationsBank, N.A., acting in such capacity as administrative
      and documentation agent being hereinafter referred to as "Agent").

                              PRELIMINARY STATEMENT

            A. All capitalized terms as used in this Guaranty and
Indemnification Agreement shall, unless otherwise defined in this Guaranty and
Indemnification Agreement, have the meanings given to such terms in Exhibit A
attached hereto.

            B. The Initial Co-Lenders have agreed on the terms, covenants and
provisions of the Credit Agreement to extend to Borrowers a revolving credit
facility in the principal sum of up to, but not in excess of, $80,000,000 (the
"Credit Facility"), which Credit Facility shall be evidenced by the Credit
Facility Notes and secured inter alia by the Mortgages.

            C. The Initial Co-Lenders were willing to extend the Credit Facility
to Borrowers only if Guarantors execute and deliver this Guaranty and
Indemnification Agreement to Agent, individually, and as administrative and
documentation agent for the equal and ratable benefit of Co-Lenders.

            NOW, THEREFORE, in consideration of Ten Dollars ($10.00) and other
good and valuable consideration, the receipt of which is hereby acknowledged,
and to induce Initial Co-Lenders to extend the Credit Facility, Guarantors
hereby represent and warrant to and covenant and agree with Agent, individually
and for the equal and ratable benefit of Co-Lenders, as follows:
<PAGE>   137
            1. Guarantors hereby represents and warrants to Agent that to the
best of Guarantors' knowledge (i) no Hazardous Material is currently located at,
on, in, under or about any Property, except as specifically set forth in the
Environmental Reports, (ii) no Hazardous Material is currently located at, in,
on, under or about any Property in a manner which violates any Environmental
Requirement, or which requires cleanup or corrective action of any kind under
any Environmental Requirement, (iii) no releasing, emitting, discharging,
leaching, dumping or disposing of any Hazardous Material from any Property onto
or into any other property or from any other property onto or into any Property
has occurred or is occurring in violation of any Environmental Requirement, (iv)
no notice of violation, lien, complaint, suit, order or other notice with
respect to any Property is presently outstanding under any Environmental
Requirement, and (v) each Property and the operation thereof are in full
compliance with all Environmental Requirements.

            2. Guarantors absolutely and unconditionally guarantee to Agent that
Borrowers will fully comply with all of the Environmental Provisions of the
Credit Agreement. If Borrowers do not fully comply with all of the Environmental
Provisions of the Credit Agreement, Guarantors shall reimburse Agent upon demand
for all costs and expenses (including, but not limited to, reasonable legal
fees) incurred by Agent or any Co-Lender (to the extent not otherwise reimbursed
to Agent or any such Co-Lender by Borrowers) in connection with Agent or any of
Co-Lenders performing Borrowers' obligations under or in respect of the
Environmental Provisions of the Credit Agreement, together with interest thereon
at the Default Rate.

            3. Guarantors will defend, indemnify, and hold harmless Agent and
Co-Lenders, and their respective employees, agents, officers and directors, from
and against any and all claims, demands, penalties, causes of action, fines,
liabilities, settlements, damages, costs or expenses of whatever kind or nature,
known or unknown, foreseen or unforeseen, contingent or otherwise (including,
without limitation, consultant fees and expenses, investigation and laboratory
fees and expenses, court costs, litigation expenses and reasonable attorneys
fees) arising out of, or in any way related to (i) any breach by Borrowers of
any of the Environmental Provisions of the Credit Agreement, (ii) the presence,
disposal, spillage, discharge, emission, leakage, release, or threatened release
of any Hazardous Material which is at, in, on, under, about, from or affecting
any Property, including without limitation, any damage or injury resulting from
any such Hazardous Material to or affecting any Property or the soil, water,
air, vegetation, buildings, personal property, persons or animals located on any
Property or on any other property or otherwise, (iii) any personal injury
(including wrongful death) or property damage (real or personal) arising out of
or related to any such Hazardous Material, (iv) any lawsuit brought or
threatened, settlement reached, or order or directive of or by any Governmental
Authority relating to such Hazardous Material, or (v) any violation of any
Environmental Requirement.

            4. The indemnifications hereinabove set forth in this Guaranty and
Indemnification Agreement shall not be applicable to any claim, demand, penalty,
cause of action, fine, liability, settlement, damage, cost or other expense of
any type whatsoever pertaining to a particular Property (i) occasioned, arising
and caused solely and directly as the result of the negligence or willful
misconduct of Agent or any Co-Lender, or any nominee or any wholly owned
subsidiary of Agent or a Co-Lender or any of their respective employees or
agents and irrespective of whether occurring prior or subsequent to the date
upon which Agent or any Co-Lender or any nominees or any wholly owned
subsidiaries of Agent or any Co-Lender acquires possession of such Property by
foreclosure of a Mortgage, a sale of such Property pursuant to the provisions of
a Mortgage, acceptance of a deed or assignment in lieu of foreclosure or sale or
otherwise, or (ii) occasioned, arising and caused solely and directly as the
result of any act of any person or party (other


                                       -2-
<PAGE>   138
than (A) an act of Borrowers or Guarantors, their respective employees or agents
or persons or parties under the control of Borrowers or Guarantors, or (B) an
act of Agent or any Co-Lender, any nominee or any wholly owned subsidiary of
Agent or any Co-Lender or any of their respective employees or agents which does
not constitute negligence or willful misconduct, or (C) an act of any
Governmental Authority, including, without limitation, any change in any
Environmental Requirement) and occurring subsequent to the earlier to occur of
(x) the date of payment in cash of the entire Debt, and (y) the date upon which
Agent, Co-Lenders, any nominee(s) or any wholly owned subsidiary(ies) of Agent
or Co-Lenders acquire possession of such Property by foreclosure of a Mortgage,
a sale of such Property pursuant to the provisions of a Mortgage, acceptance of
a deed or assignment in lieu of foreclosure or sale or otherwise.

            5. Except as hereinabove specifically provided to the contrary in
paragraph 4 above, the obligations and liabilities of Guarantors under this
Guaranty and Indemnification Agreement shall survive and continue in full force
and effect and shall not be terminated, discharged or released, in whole or in
part, irrespective of whether the Debt has been paid in full and irrespective of
any foreclosure of the Mortgages, the sale of any one or more of the Properties
pursuant to the provisions of the Mortgages or acceptance by Agent, Co-Lenders,
their nominee(s) or wholly-owned subsidiary(ies), of one or more deeds or
assignments in lieu of foreclosure or sale and irrespective of any other fact or
circumstance whatsoever.

            6. Guarantors hereby consent that from time to time, before or after
any default by Borrowers, with or without further notice to or assent from
Guarantors, any security at any time held by or available to Agent or any
Co-Lender for any obligation of Borrowers, or any security at any time held by
or available to Agent or any Co-Lenders for any obligation of any other person
or party secondarily or otherwise liable for all or any portion of the Debt or
for the performance of all or any portion of the Environmental Provisions of the
Credit Agreement, may be exchanged, surrendered or released and any obligation
of Borrowers, or of any such other person or party, may be changed, altered,
renewed, extended, continued, surrendered, compromised, waived or released in
whole or in part, or any default with respect thereto waived, and Agent or any
Co-Lender may fail to set off and may release, in whole or in part, any balance
of any deposit account or credit on its books in favor of Borrowers, or of any
such other person or party, and may extend further credit in any manner
whatsoever to Borrowers, and generally deal with Borrowers or any such security
or other person or party as Agent or such Co-Lender may see fit; and Guarantors
shall remain bound under this Guaranty and Indemnification Agreement
notwithstanding any such exchange, surrender, release, change, alteration,
renewal, extension, continuance, compromise, waiver, inaction, extension of
further credit or other dealing.

            7. To the full extent that this Guaranty and Indemnification
Agreement relates to any monetary obligation of Borrowers in respect of the
Environmental Provisions of the Credit Agreement, this Guaranty and
Indemnification Agreement is a guaranty of payment and not of collection and
Guarantors further waive any right to require that any action, case or
proceeding be brought against Borrowers or any other person or party or to
require that resort be had to any security or to any balance of any deposit
account or credit on the books of Agent or any Co-Lender in favor of Borrowers
or any other person or party.

            8. Each reference herein to Co-Lenders and to Agent shall be deemed
to include their respective successors and assigns, in whose favor the
provisions of this Guaranty and Indemnification Agreement shall also inure. Each
reference herein to Guarantors shall be deemed to include the successors and
assigns of Guarantors, all of whom shall be bound by the provisions of this
Guaranty and Indemnification Agreement, provided, however, that


                                       -3-
<PAGE>   139
Guarantors shall in no event or under any circumstance have the right without
obtaining the prior written consent of Agent to assign or transfer their
respective obligations and liabilities under this Guaranty and Indemnification
Agreement, in whole or in part, to any other person, party or entity.

            9. The term "Guarantors" as used herein shall mean the "Guarantors
and each of them" and each undertaking herein contained shall be their joint and
several undertaking, provided, however, that in the next succeeding paragraph
hereof the term "Guarantors" shall mean the "Guarantors or any of them."

            10. No delay on the part of Agent in exercising any right or remedy
under this Guaranty and Indemnification Agreement or failure to exercise the
same shall operate as a waiver in whole or in part of any such right or remedy.
No notice to or demand on Guarantors shall be deemed to be a waiver of the
obligation of Guarantors or of the right of Agent to take further action without
notice or demand as provided in this Guaranty and Indemnification Agreement.

            11. This Guaranty and Indemnification Agreement may only be
modified, amended, changed or terminated by an agreement in writing signed by
Agent and Guarantors. No waiver of any term, covenant or provision of this
Guaranty and Indemnification Agreement shall be effective unless given in
writing by Agent and if so given by Agent shall only be effective in the
specific instance in which given.

            12. Guarantors acknowledge that this Guaranty and Indemnification
Agreement and Guarantors's obligations under this Guaranty and Indemnification
Agreement are and shall at all times continue to be absolute and unconditional
in all respects, and shall at all times be valid and enforceable irrespective of
(a) any other agreements or circumstances of any nature whatsoever which might
otherwise constitute a defense (other than a defense of payment) to this
Guaranty and Indemnification Agreement and the obligations of Guarantors under
this Guaranty and Indemnification Agreement or the obligations of Borrowers or
of any other person or party relating to this Guaranty and Indemnification
Agreement or the obligations of Guarantors hereunder or otherwise with respect
to the Credit Facility, including, but not limited to, the realization by Agent
or any Co-Lender upon any collateral given, pledged or assigned as security for
all or any portion of the Debt or for the performance of the Environmental
Provisions of the Credit Agreement, or the filing of a petition or the
commencement of a case with respect to any Borrower or any Guarantor under Title
11 of the United States Code, as now constituted or hereafter amended (the
"Bankruptcy Code"), or under any other applicable Federal or state bankruptcy,
insolvency or similar law, or the obtaining by Agent or any Co-Lender of title
to any collateral given, pledged or assigned as security for the Debt or for the
performance of the Environmental Provisions of the Credit Agreement, by
foreclosure or enforcement of Agent's or any Co-Lender's lien thereon,
acceptance of an assignment or deed in lieu of foreclosure or sale, or
otherwise, or (b) any modification, impairment, abatement, reduction, release,
limitation, restructure, reinstatement or cure, in whole or part, of the
Environmental Provisions of the Credit Agreement (including, without limitation,
any such modification, impairment, abatement, reduction, release, limitation,
restructure, reinstatement or cure, in whole or in part, of any interest or
other sums payable by Borrowers under or in respect of the Environmental
Provisions of the Credit Agreement) pursuant to an order by a bankruptcy court
or other court of competent jurisdiction in any action, case or proceeding
brought under the Bankruptcy Code or under any other applicable Federal or state
bankruptcy, insolvency or similar law, it being expressly acknowledged and
agreed by Guarantors that if any such modification, impairment, abatement,
reduction, release, limitation, restructure, reinstatement or cure, in whole or
part, is so ordered in any such action, case or proceeding, Guarantors'
obligations under this Guaranty and

                                       -4-
<PAGE>   140
Indemnification Agreement will nevertheless continue to be determined as if such
order had not been issued. Guarantors absolutely, unconditionally and
irrevocably waive any and all right to assert any defense, setoff, counterclaim
or crossclaim of any nature whatsoever with respect to this Guaranty and
Indemnification Agreement or the obligations of Guarantors under this Guaranty
and Indemnification Agreement or the obligations of Borrowers or any other
person or party relating to this Guaranty and Indemnification Agreement or the
obligations of Guarantors hereunder or otherwise with respect to the Credit
Facility, in any action, case or proceeding brought by Agent or Co-Lenders to
enforce the obligations of Guarantors under this Guaranty and Indemnification
Agreement (provided, however, that the foregoing provisions of this sentence
shall not be deemed a waiver of the right of the Guarantors to assert any
compulsory counterclaim in any such action, case or proceeding brought by Agent
or Co-Lenders in any state court if such counterclaim is compelled under local
law or rule or procedure, or in any such action, case or proceeding brought by
Agent or Co-Lenders in a court of the United States, nor shall the foregoing
provisions of this sentence be deemed a waiver of the right of the Guarantors to
assert any claim which would otherwise constitute a defense, setoff,
counterclaim or crossclaim of any nature whatsoever against Agent or Co-Lenders
in any separate action, case or proceeding brought by the Guarantors against
Agent of Co-Lenders). Guarantors acknowledge that no oral or other agreements,
understandings, representations or warranties exist with respect to this
Guaranty and Indemnification Agreement or with respect to the obligations of
Guarantors under this Guaranty and Indemnification Agreement, except those
specifically set forth in this Guaranty and Indemnification Agreement, and that
this Guaranty and Indemnification Agreement sets forth the entire agreement and
understanding of Agent, Co-Lenders and Guarantors.

            13. GUARANTORS HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE, AND
AGENT AND CO-LENDERS BY THEIR ACCEPTANCE OF THIS GUARANTY AND INDEMNIFICATION
AGREEMENT IRREVOCABLY AND UNCONDITIONALLY WAIVE, ANY AND ALL RIGHT TO TRIAL BY
JURY IN ANY ACTION, CASE, PROCEEDING, SUIT OR COUNTERCLAIM ARISING IN CONNECTION
WITH, OUT OF OR OTHERWISE RELATING TO THIS GUARANTY AND INDEMNIFICATION
AGREEMENT.

            14. Notwithstanding any payments made by Guarantors pursuant to the
provisions of this Guaranty and Indemnification Agreement, Guarantors shall not
seek to enforce or collect upon any rights which Guarantors now have or may
acquire against Borrowers either by way of subrogation, indemnity, reimbursement
or contribution for any amount paid under this Guaranty and Indemnification
Agreement, nor shall Guarantors file, assert or receive payment on any claim,
whether now existing or hereafter arising, against Borrowers subsequent to the
commencement of a case by or against Borrowers under the Bankruptcy Code or
under any other applicable Federal or state bankruptcy, insolvency or similar
law, in each case unless and until the Debt has been paid in full and provided
that no such action by Guarantors could, in the reasonable opinion of Agent and
its counsel, result in the "preference" period (as set forth in Section
547(b)(4) of the Bankruptcy Code or any successor provision) with respect to any
payment or other transfer of assets to Agent or to any Co-Lender from or on
behalf of Borrowers being held to be longer than such period would have been
held to be if Guarantors had not taken such action. In the event an action, case
or proceeding is filed or commenced under the Bankruptcy Code or under any other
applicable Federal or state bankruptcy, insolvency or similar law in regard to
Borrowers or an action, case or proceeding is otherwise commenced for the
benefit of the creditors of Borrowers, this Guaranty and Indemnification
Agreement shall at all times thereafter remain effective in regard to any
payments to Agent or any Co-Lender or other transfers of assets to Agent or any
Co-Lender received from or on behalf of Borrowers under or in respect of the
Environmental Provisions of the Credit Facility Documents which are held
voidable on the grounds of preference, fraudulent conveyance or otherwise,
whether or not the Debt has been paid in full or whether or not the Mortgages or
any or all of the


                                       -5-
<PAGE>   141
Environmental Provisions of the Credit Agreement have been discharged or
released.

            15. If at any time any payment, or portion thereof, made by, or for
the account of, Guarantors on account of the obligations under this Guaranty and
Indemnification Agreement, is set aside by any court or trustee having
jurisdiction as a voidable preference, fraudulent conveyance or otherwise as
being subject to avoidance or recovery under the provisions of the Bankruptcy
Code or under any other applicable Federal or state bankruptcy, insolvency or
similar law, Guarantors hereby agree that this Guaranty and Indemnification
Agreement (a) shall continue and remain in full force and effect, or (b) if
previously terminated as a result of Guarantors having fulfilled Guarantors'
obligations hereunder in full or as a result of Agent having released Guarantors
from Guarantors' obligations and liabilities hereunder, shall without further
act or instrument be reinstated and shall thereafter remain in full force and
effect, in either case with the same force and effect as though such payment or
portion thereof had not been made, and if applicable, as if such previous
termination had not occurred.

            16. Any notice, request or demand given or made under this Guaranty
and Indemnification Agreement shall be in writing and shall be sent by Federal
Express or other reputable national courier service or by postage prepaid
registered or certified mail, return receipt requested, and shall be deemed
given (i) when received at the following addresses if sent by Federal Express or
other reputable national courier service, and (ii) three (3) business days after
being postmarked and addressed as follows if sent by registered or certified
mail, return receipt requested:

                  If to Agent:

                        NationsBank, N.A.
                        Real Estate Banking
                        8300 Greensboro Drive
                        McLean, Virginia 22102-3604
                        Attention: Gary P.F. Carr
                                   Vice President

                  With copies to:

                        Cadwalader, Wickersham & Taft
                        201 South College Street - Suite 1510
                        Charlotte, North Carolina 28244
                        Attention: James P. Carroll, Esq.

                  and

                        Battle Fowler LLP
                        Park Avenue Tower
                        75 East 55th Street
                        New York, New York 10022
                        Attention: Dean A. Stiffle, Esq.

                  If to Borrowers:

                        c/o Brandywine Realty Trust
                        Newtown Square Corporate Campus
                        16 Campus Boulevard, Suite 150
                        Newtown Square, Pennsylvania 19073
                        Attention: Gerard H. Sweeney
                                   President and Chief
                                   Executive Officer


                                       -6-
<PAGE>   142
                  With a copy to:

                        Pepper, Hamilton & Scheetz
                        3000 Two Logan Square
                        Eighteenth and Arch Streets
                        Philadelphia, Pennsylvania 19103-2799
                        Attention: Michael H. Friedman, Esq.

                  If to Guarantors:

                        c/o Brandywine Realty Trust
                        Newtown Square Corporate Campus
                        16 Campus Boulevard, Suite 150
                        Newtown Square, Pennsylvania 19073
                        Attention: Gerard H. Sweeney
                                   President and Chief
                                   Executive Officer

                  With a copy to:

                        Pepper, Hamilton & Scheetz
                        3000 Two Logan Square
                        Eighteenth and Arch Streets
                        Philadelphia, Pennsylvania 19103-2799
                        Attention: Michael H. Friedman, Esq.


Each party to this Guaranty and Indemnification Agreement may designate a change
of address by notice given to the other parties fifteen (15) days prior to the
date such change of address is to become effective.

            17. This Guaranty and Indemnification Agreement is, and shall be
deemed to be, a contract entered into under and pursuant to the laws of the
State of New York and shall be in all respects governed, construed, applied and
enforced in accordance with the laws of the State of New York. No defense given
or allowed by the laws of any other state or country shall be interposed in any
action, case or proceeding hereon unless such defense is also given or allowed
by the laws of the State of New York.

            18. Guarantors agree to submit to personal jurisdiction in the State
of New York in any action, case or proceeding arising out of this Guaranty and
Indemnification Agreement and, in furtherance of such agreement, Guarantors
hereby agree and consent that without limiting other methods of obtaining
jurisdiction, personal jurisdiction over Guarantors in any such action, case or
proceeding may be obtained within or without the jurisdiction of any court
located in New York and that any process or notice of motion or other
application to any such court in connection with any such action, case or
proceeding may be served upon Guarantors by registered or certified mail to or
by personal service at the last known addresses of Guarantors, whether such
addresses be within or without the jurisdiction of any such court. Guarantors
also agree that the venue of any litigation arising in connection with the
Environmental Provisions of the Credit Agreement, the Debt or in respect of any
of the obligations of Guarantors under this Guaranty and Indemnification
Agreement shall, to the extent permitted by law, be in New York County, New
York.

            19. No exculpatory provisions contained in any of the Credit
Facility Documents shall in any event or any circumstance be deemed or construed
to modify, qualify, or affect in any manner whatsoever the personal recourse
obligations and liabilities of Guarantors under this Guaranty and
Indemnification Agreement.


                                       -7-
<PAGE>   143
            20. The obligations and liabilities of Guarantors under this
Guaranty and Indemnification Agreement are in addition to the obligations and
liabilities of Guarantors under the Other Guaranties (as hereinafter defined).
The discharge of Guarantors' obligations and liabilities under any one or more
of the Other Guaranties by Guarantors or by reason of operations of law or
otherwise shall in no event or under any circumstance in and of itself
constitute or be deemed to constitute a discharge, in whole or in part, of
Guarantors' obligations and liabilities under this Guaranty and Indemnification
Agreement. Conversely, the discharge of Guarantors' obligations and liabilities
under this Guaranty and Indemnification Agreement by Guarantors or by reason of
operation of law or otherwise shall in no event or under any circumstance in and
of itself constitute or be deemed to constitute a discharge, in whole or in
part, of Guarantors' obligations and liabilities under any of the Other
Guaranties. The term "Other Guaranties" as used herein shall mean any other
guaranty of payment, guaranty of performance, completion guaranty,
indemnification agreement or other guaranty or instrument of personal recourse
obligation or undertaking of any nature whatsoever (other than this Guaranty and
Indemnification Agreement) now or hereafter executed and delivered by Guarantors
to Agent or Co-Lenders or any of them in connection with the Credit Facility.

            21. This Guaranty and Indemnification Agreement may be executed in
one or more counterparts by some or all of the parties hereto, each of which
counterparts shall be an original and all of which together shall constitute a
single agreement of guaranty. The failure of any party listed below to execute
this Guaranty and Indemnification Agreement, or any counterpart hereof, shall
not relieve the other signatories from their obligations hereunder.

            22. Guarantors agree that, with or without notice or demand,
Guarantors will reimburse Agent, (to the extent that such reimbursement is not
made by Borrowers), for all costs and expenses (including, without limitation,
reasonable attorneys' fees) incurred by Agent or any Co-Lender in connection
with any action, case or proceeding brought by Agent to enforce the obligations
of Guarantors under this Guaranty and Indemnification Agreement.

            23. No recourse shall be had for any obligation of BRT under this
Guaranty and Indemnification Agreement or for any claim based thereon or
otherwise in respect thereof, against any past, present or future trustee,
shareholder, officer or employee of BRT, whether by virtue of any statute or
rule of law, or by the enforcement of any assessment or penalty or otherwise,
all such liability being expressly waived and released by each other party to
and beneficiary of this Guaranty and Indemnification Agreement.

            24. No recourse shall be had for any obligation of BRP under this
Guaranty and Indemnification Agreement or any of the other Credit Facility
Documents or for any claim based thereon or otherwise in respect thereof,
against Brandywine Specified Property Investors Limited Partnership, a
Pennsylvania limited partnership and one of the general partners of BRP, whether
by virtue of any statute or rule of law, or by the enforcement of any assessment
or penalty or otherwise, all such liability being expressly waived and released
by each other party to and beneficiary of this Guaranty and Indemnification
Agreement and by the other general partners of BRP.


                                       -8-
<PAGE>   144
            IN WITNESS WHEREOF, Guarantors have duly executed and delivered this
Guaranty and Indemnification Agreement to Agent as of the day and year first
above set forth.

                              BRANDYWINE REALTY TRUST, a Maryland real estate
                              investment trust

                              By:_________________________________
                                    Name:   Gerard H. Sweeney
                                    Title:  President and Chief
                                            Executive Officer

                              BRANDYWINE OPERATING PARTNERSHIP, L.P., a
                              Delaware limited partnership

                              By:   Brandywine Realty Trust, a Maryland real
                                    estate investment trust, its general
                                     partner

                                    By:  _________________________
                                         Name:  Gerard H. Sweeney
                                         Title: President and Chief
                                                Executive Officer

                              LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania
                              limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                       -9-
<PAGE>   145
                              NICHOLS LANSDALE LIMITED PARTNERSHIP III, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania
                              limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania
                              limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                      -10-
<PAGE>   146
                              C/N OAKLANDS LIMITED PARTNERSHIP I, a
                              Pennsylvania limited partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              FIFTEEN HORSHAM, L.P., a Pennsylvania limited
                              partnership

                              By:   Witmer Operating Partnership I, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Holdings I, Inc., a
                                          Pennsylvania corporation, its
                                          general partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              C/N LEEDOM LIMITED PARTNERSHIP II, a
                              Pennsylvania limited partnership

                              By:   Brandywine Operating Partnership, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Realty Trust, a Maryland
                                          limited partnership, its general
                                          partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer


                                      -11-
<PAGE>   147
                              C/N IRON RUN LIMITED PARTNERSHIP III, a
                              Pennsylvania limited partnership

                              By:   Brandywine Operating Partnership, L.P., a
                                    Delaware limited partnership, its general
                                    partner

                                    By:   Brandywine Realty Trust, a Maryland
                                          limited partnership, its general
                                          partner

                                          By:___________________________
                                             Name:   Gerard H. Sweeney
                                             Title:  President and Chief
                                                     Executive Officer

                              WITMER OPERATING PARTNERSHIP, L.P.

                              By:   Brandywine Holdings I, Inc., a
                                    Pennsylvania corporation, its general
                                    partner

                                    By:___________________________
                                       Name:   Gerard H. Sweeney
                                       Title:  President and Chief
                                               Executive Officer

                              BRANDYWINE REALTY PARTNERS, a Pennsylvania
                              general partnership

                              By:   Brandywine Realty Trust, a Maryland
                                    limited partnership, its general partner

                                    By:___________________________
                                       Name:   Gerard H. Sweeney
                                       Title:  President and Chief
                                               Executive Officer

                              BRANDYWINE REALTY CORPORATION, a Pennsylvania
                              corporation

                                    By:___________________________
                                       Name:    Gerard H. Sweeney
                                       Title:   President and Chief
                                                Executive Officer


                                      -12-
<PAGE>   148
                                    EXHIBIT A

                                  (DEFINITIONS)




Agent: The term "Agent" as used in this Guaranty and Indemnification Agreement
shall have the meaning given to such term in the preamble to this Guaranty and
Indemnification Agreement.

BOP: The term "BOP" as used in this Guaranty and Indemnification Agreement shall
have the meaning given to such term in the preamble to this Guaranty and
Indemnification Agreement.

Borrowers: The term "Borrowers" as used in this Guaranty and Indemnification
Agreement shall have the meaning given to such term in the preamble to this
Guaranty and Indemnification Agreement.

BRT: The term "BRT" as used in this Guaranty and Indemnification Agreement shall
have the meaning given to such term in the preamble to this Guaranty and
Indemnification Agreement.

BRT/BOP Limited Partnership: The term "BRT/BOP Limited Partnership" as used in
this Guaranty and Indemnification Agreement shall have the meaning given to such
term in the preamble to this Guaranty and Indemnification Agreement.

Co-Lenders: The term "Co-Lenders" as used in this Guaranty and Indemnification
Agreement shall mean the Initial Co-Lenders and all other parties from time to
time to whom direct interests in the Credit Facility are sold, transferred and
assigned, and who are as a result thereof designated as Co-Lenders, under and
pursuant to the provisions of the Credit Agreement and the Co-Lenders Agreement.

Co-Lenders Agreement: The term "Co-Lenders Agreement" as used in this Guaranty
and Indemnification Agreement shall mean that certain Co-Lender and Servicing
Agreement dated as of the date hereof among Smith Barney Mortgage Capital Group,
Inc., NationsBank, N.A., in its individual capacity, and NationsBank, N.A., in
its capacity as Agent.

Credit Agreement: The term "Credit Agreement" as used in this Guaranty and
Indemnification Agreement shall mean that certain Revolving Credit Agreement
dated as of the date hereof among Smith Barney Mortgage Capital Group, Inc.,
NationsBank, N.A., in its individual capacity, Borrowers and NationsBank, N.A.,
in its capacity as Agent and pursuant to the provisions of which the Credit
Facility is being extended by Co-Lenders to Borrowers.

Credit Facility: The term "Credit Facility" as used in this Guaranty and
Indemnification Agreement shall have the meaning given to such term in paragraph
B of the Preliminary Statement of this Guaranty and Indemnification Agreement.

Credit Facility Documents: The term "Credit Facility Documents" as used in this
Guaranty and Indemnification Agreement shall have the meaning given to such term
in the Credit Agreement.

Credit Facility Notes: The term "Credit Facility Notes" as used in this Guaranty
and Indemnification Agreement shall have the meaning given to such term in the
Credit Agreement.

Debt:  The term "Debt" as used in this Guaranty and Indemnification Agreement
shall have the meaning given to such term in the Credit Agreement.

                                       A-1
<PAGE>   149
Default Rate: The term "Default Rate" as used in this Guaranty and
Indemnification Agreement shall to the extent necessary be determined on a daily
basis and shall be equal to four (4%) percent plus the Floating Rate.

Environmental Provisions: The term "Environmental Provisions" as used in this
Guaranty and Indemnification Agreement shall mean the terms, covenants and
provisions set forth in the paragraph of the Credit Agreement entitled
"Environmental Provisions" on the part of Borrowers to be observed and
performed.

Environmental Requirements: The term "Environmental Requirements" as used in
this Guaranty and Indemnification Agreement shall mean all present and future
laws, statutes, ordinances, rules, regulations, orders, codes, licenses,
permits, decrees, judgments, directives or the equivalent of or by any
Governmental Authority and relating to or addressing the protection of the
environment or human health.

Environmental Reports: The term "Environmental Reports" as used in this Guaranty
and Indemnification Agreement shall have the meaning given to such term in the
Credit Agreement.

Floating Rate: The term "Floating Rate" as used in this Guaranty and
Indemnification Agreement shall have the meaning given to such term in the
Credit Agreement.

Governmental Authority: The term "Governmental Authority" as used in this
Guaranty and Indemnification Agreement shall mean the Federal government, or any
state or other political subdivision thereof, or any agency, court or body of
the Federal government, any state or other political subdivision thereof,
exercising executive, legislative, judicial, regulatory or administrative
functions.

Guarantors: The term "Guarantors" as used in this Guaranty and Indemnification
Agreement shall have the meaning given to such term in the preamble to this
Guaranty and Indemnification Agreement.

Hazardous Material: The term "Hazardous Material" as used in this Guaranty and
Indemnification Agreement shall mean any material or substance that, whether by
its nature or use, is now or hereafter defined as a hazardous waste, hazardous
substance, pollutant or contaminant under any Environmental Requirement, or
which is toxic, explosive, corrosive, flammable, infectious, radioactive,
carcinogenic, mutagenic or otherwise hazardous and which is now or hereafter
regulated under any Environmental Requirement, or which is or contains
petroleum, gasoline, diesel fuel or another petroleum hydrocarbon product.

Initial Co-Lenders: The term "Initial Co-Lenders" as used in this Guaranty and
Indemnification Agreement shall mean collectively Smith Barney Mortgage Capital
Group, Inc., and NationsBank, N.A.

Mortgages: The term "Mortgages" as used in this Guaranty and Indemnification
Agreement shall have the meaning given to such term in the Credit Agreement.

Other Guaranties: The term "Other Guaranties" as used in this Guaranty and
Indemnification Agreement shall have the meaning given to such term in paragraph
20 of this Guaranty and Indemnification Agreement.

Properties: The term "Properties" as used in this Guaranty and Indemnification
Agreement shall have the meaning given to such term in the Credit Agreement.


                                       A-2
<PAGE>   150
                                    EXHIBIT L

                       (Form of Co-Lenders Certificate)**


                  NationsBank, N.A., not individually but in its capacity as
administrative agent and documentation agent ("Agent") for the equal and ratable
benefit of Co-Lenders, under a certain Revolving Credit Agreement (the "Credit
Agreement") dated November 25, 1996, entered into among SMITH BARNEY MORTGAGE
CAPITAL GROUP, INC.; NATIONSBANK, N.A., acting in its individual capacity;
BRANDYWINE REALTY TRUST; BRANDYWINE OPERATING PARTNERSHIP, L.P.; LC/N HORSHAM
LIMITED PARTNERSHIP; LC/N KEITH VALLEY LIMITED PARTNERSHIP I; NICHOLS LANSDALE
LIMITED PARTNERSHIP III; NEWTECH III LIMITED PARTNERSHIP; NEWTECH IV LIMITED
PARTNERSHIP; C/N OAKLANDS LIMITED PARTNERSHIP I; FIFTEEN HORSHAM, L.P.; C/N
LEEDOM LIMITED PARTNERSHIP II; C/N IRON RUN LIMITED PARTNERSHIP III; and
NATIONSBANK, N.A., as Agent, hereby certifies to Borrowers as follows:

                  The Credit Facility Percentage Interests held by each
Co-Lender in the Credit Facility (inclusive of any risk participations in any
Letter of Credit which is issued and outstanding under the Credit Facility) on
the date hereof are as follows:

                                    Amount         Percentage Interest


Smith Barney                     $__________             _____%

NationsBank                      $__________             _____%

____________                     $__________             _____%

____________                     $__________             _____%

____________                     $__________             _____%

____________                     $__________             _____%


Dated:  _______________, 199_               NATIONSBANK, N.A., as Agent



                                            By:      __________________________
                                                     Name:
                                                     Title:
________

**       All terms used in this Co-Lenders Certificate shall have the meanings
         given to such terms in the Credit Agreement.
<PAGE>   151
                                    EXHIBIT M

                         (Form of Operating Statements)


TO BE MUTUALLY AGREED UPON BY INITIAL LENDERS AND BORROWERS SUBSEQUENT TO THE
DATE OF THIS AGREEMENT.
<PAGE>   152
                                    EXHIBIT N

                         (Form of Financial Statements)

TO BE MUTUALLY AGREED UPON BY INITIAL LENDERS AND BORROWERS SUBSEQUENT TO THE
DATE OF THIS AGREEMENT.
<PAGE>   153
                                    EXHIBIT O

                           (Form of Operating Budgets)


TO BE MUTUALLY AGREED UPON BY INITIAL LENDERS AND BORROWERS SUBSEQUENT TO THE
DATE OF THIS AGREEMENT.
<PAGE>   154
                                    EXHIBIT P

                     (Form of Reconciled Quarterly Budgets)


TO BE MUTUALLY AGREED UPON BY INITIAL LENDERS AND BORROWERS SUBSEQUENT TO THE
DATE OF THIS AGREEMENT.
<PAGE>   155
                                    EXHIBIT Q

                            (Insurance Requirements)


                  Insurance Coverage. Borrowers will insure the Properties
against such perils and hazards, and in such amounts and with such limits, as
Co-Lender may from time to time require, and in any event will continuously
maintain, without cost or expense to Co-Lenders, each of the following described
Insurance Policies with respect to each Property and naming Co-Lenders, their
affiliates, subsidiaries, successors and assigns, as their interests may appear,
as additional insured:

                                    A. All risk property insurance against loss
                  and damage by all risks of physical loss or damage, including,
                  but not limited to, fire, sprinkler leakage, windstorm and
                  other risks covered by the so-called extended coverage
                  endorsement, covering the Property and the FF&E in amounts not
                  less than one hundred percent (100%) of the full replacement
                  cost value of the Property and the FF&E from time to time
                  constituting part of the Collateral, with a one hundred
                  percent (100%) co-insurance clause or an "agreed value" form
                  endorsement in lieu of a one hundred percent (100%)
                  co-insurance clause and an inflation adjustment endorsement;

                                    B. Business interruption insurance
                  (including rental interruption insurance) to cover loss of
                  income, including all Rents, in an amount not less than twelve
                  (12) months' projected gross income of the Properties, as
                  determined from time to time by Co-Lenders;

                                    C. Steam boiler, machinery and pressurized
                  vessel insurance, with a limit of not less than Ten Million
                  Dollars ($10,000,000);

                                    D. Commercial general liability insurance
                  (including coverage for elevators) against death, bodily
                  injury and property damage with a combined single limit in an
                  amount of not less than One Million Dollars ($1,000,000),
                  including a waiver of subrogation clause acceptable to
                  Co-Lenders;

                                    E. Excess liability insurance with a limit
                  of not less than Four Million Dollars ($4,000,000) over
                  primary insurance, which insurance shall include, but not be
                  limited to, general and automobile liability, and safeguarding
                  of personalty, with coverages, risks insured and waiver of
                  subrogation clauses acceptable to Co-Lenders;

                                    F. If a Property or any portion thereof lies
                  within a federally designated flood hazard area other than
                  Zone C or Zone X, as described in the document entitled
                  "Department of Housing and Urban Development, Federal
                  Insurance Administration Special Flood Hazard Area Maps",
                  flood insurance at the maximum limit available through the
                  Federal Flood Insurance Program and to the extent the same is
                  available at commercially reasonable rates, supplemental
                  commercial insurance for not less than one hundred percent
                  (100%) of the insurable value of the Property.

                                    G. The types and amounts of coverage as are
                  customarily (i) maintained by owners or operators of
                  properties which are comparable to the Properties, and/or (ii)
                  required by sophisticated institutional lenders on credit
                  facilities which are similar to the Credit Facility, which
                  types and amounts of coverage shall be determined by
                  Co-Lenders in the exercise of their sole and absolute
                  discretion.

<PAGE>   1
                                                                Exhibit 10.2
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Brandywine Realty Trust:
 
     We have audited the combined statement of revenue and certain expenses of
the Delaware Corporate Center Acquisition Property (the "Delaware Corporate
Center") described in Note 1 for the year ended December 31, 1995. This
financial statement is the responsibility of management. Our responsibility is
to express an opinion on this financial statement based on our audit.
 
     We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and the significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.
 
     The combined statement of revenue and certain expenses was prepared for the
purpose of complying with the rules and regulations of the Securities and
Exchange Commission for inclusion in the registration statement on Form S-11 of
Brandywine Realty Trust as described in Note 1 and is not intended to be a
complete presentation of the Delaware Corporate Center's revenue and expenses.
 
     In our opinion, the financial statement referred to above presents fairly,
in all material respects, the revenue and certain expenses of the Delaware
Corporate Center for the year ended December 31, 1995, in conformity with
generally accepted accounting principles.
 
                                          ARTHUR ANDERSEN LLP
 
Philadelphia, Pa.,
  October 31, 1996
 
                                      F-53
<PAGE>   2
 
                           DELAWARE CORPORATE CENTER
 
               COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                (NOTES 1 AND 2)
 
<TABLE>
<CAPTION>
                                                                                   FOR THE
                                                       FOR THE            NINE-MONTH PERIODS ENDED
                                                      YEAR ENDED      ---------------------------------
                                                     DECEMBER 31,     SEPTEMBER 30,       SEPTEMBER 30,
                                                         1995             1995                1996
                                                     ------------     -------------       -------------
                                                                                  UNAUDITED
<S>                                                  <C>              <C>                 <C>
REVENUE:
  Base rents (Note 2)..............................    $410,000          $378,000           $1,666,000
                                                       --------          --------           ----------
          Total revenue............................     410,000           378,000            1,666,000
                                                       --------          --------           ----------
CERTAIN EXPENSES:
  Maintenance and other operating expenses.........     122,000            72,000              146,000
  Utilities........................................     145,000           111,000              137,000
  Real estate taxes................................     126,000            91,000               87,000
  Ground rent......................................     109,000            82,000               82,000
                                                       --------          --------           ----------
          Total certain expenses...................     502,000           356,000              452,000
                                                       --------          --------           ----------
REVENUE IN EXCESS OF CERTAIN EXPENSES..............    $(92,000)         $ 22,000           $1,214,000
                                                       ========          ========           ==========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-54
<PAGE>   3
 
                           DELAWARE CORPORATE CENTER
 
          NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                               DECEMBER 31, 1995
 
1. BASIS OF PRESENTATION:
 
     The combined statement of revenue and certain expenses reflects the
operations of the Delaware Corporate Center (the "Delaware Corporate Center")
located in New Castle County, Delaware. This property is expected to be acquired
by Brandywine Realty Trust (the "Company") from Koll Investment Management, Inc.
in November, 1996. The Delaware Corporate Center has aggregate net rentable area
of approximately 105,000 square feet and was 11% leased as of December 31, 1995.
This combined statement of revenue and certain expenses is to be included in the
Trust's registration statement on Form S-11 as the acquisition has been deemed
significant pursuant to the rules and regulations of the Securities and Exchange
Commission.
 
     The accounting records of the Delaware Corporate Center are maintained on
an accrual basis. The accompanying financial statement excludes certain expenses
such as interest, depreciation and amortization, professional fees, and other
costs not directly related to the future operations of the Delaware Corporate
Center.
 
     The combined statement of revenue and certain expenses for the nine months
ended September 30, 1996 and 1995, are unaudited. In the opinion of management,
all adjustments consisting solely of normal recurring adjustments necessary for
a fair presentation of the financial statements for the interim period have been
included. The results for the interim period are not necessarily indicative of
the results for the full year.
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expense during the reporting
period. Actual results could differ from those estimates.
 
2. OPERATING LEASES:
 
     Base rents presented for the nine-month period ended September 30, 1996,
include straight-line adjustments for rental revenue increases in accordance
with generally accepted accounting principles. The aggregate rental revenue
increase resulting from the straight-line adjustment for the nine-month period
ended September 30, 1996, was $302,000 (unaudited).
 
Existing tenants whose minimum rental payments equaled 10% or more of the total
base rents in 1995 were:
 
<TABLE>
        <S>                                                                  <C>
        Great Western Mortgage Corporation.................................  $63,000
        Federal Deposit Insurance Corporation..............................   46,000
        The Lubrizol Corporation...........................................   42,000
</TABLE>
 
     The Delaware Corporate Center is leased to tenants under operating leases
with expiration dates extending to the year 1999. Future minimum rentals under
noncancelable operating leases excluding tenant reimbursements of operating
expenses as of December 31, 1995 were as follows:
 
<TABLE>
        <S>                                                                 <C>
        1996..............................................................  $209,000
        1997..............................................................   159,000
        1998..............................................................   142,000
        1999..............................................................    58,000
</TABLE>
 
     Certain leases also include provisions requiring tenants to reimburse the
Company for management costs and other operating expenses up to stipulated
amounts.
 
                                      F-55
<PAGE>   4
 
                           DELAWARE CORPORATE CENTER
 
    NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES (CONTINUED)
                               DECEMBER 31, 1995
 
     Subsequent to December 31, 1995, a significant tenant (Kimberly Clark)
entered into an operating lease to occupy 93,000 square feet of the Delaware
Acquisition Property. This lease extends to the year 2005, and the Delaware
Corporate Center is 100% occupied as a result of this lease.
 
3. LAND LEASE:
 
     The Delaware Corporate Center is the leasee under a land lease extending to
the year 2048. Annual ground rent payments under this lease are presently
$109,000. Payments under the lease will be adjusted in 1998 and at each five
year period thereafter, based on increases on the consumer price index.
 
                                      F-56

<PAGE>   1
                                                                Exhibit 10.3
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Brandywine Realty Trust:
 
     We have audited the combined statement of revenue and certain expenses of
the Equivest Management, Inc. Acquisition Properties ("700/800 Business Center
Drive") described in Note 1 for the year ended December 31, 1995. This financial
statement is the responsibility of management. Our responsibility is to express
an opinion on this financial statement based on our audit.
 
     We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and the significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.
 
     The combined statement of revenue and certain expenses was prepared for the
purpose of complying with the rules and regulations of the Securities and
Exchange Commission for inclusion in the registration statement on Form S-11 of
Brandywine Realty Trust as described in Note 1 and is not intended to be a
complete presentation of 700/800 Business Center Drive's revenue and expenses.
 
     In our opinion, the financial statement referred to above presents fairly,
in all material respects, the revenue and certain expenses of the 700/800
Business Center Drive for the year ended December 31, 1995, in conformity with
generally accepted accounting principles.
 
                                          ARTHUR ANDERSEN LLP
 
Philadelphia, Pa.,
  October 31, 1996
 
                                      F-57
<PAGE>   2
 
                         700/800 BUSINESS CENTER DRIVE
 
               COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                (NOTES 1 AND 2)
 
<TABLE>
<CAPTION>
                                                                                    FOR THE
                                                         FOR THE           NINE-MONTH PERIODS ENDED
                                                        YEAR ENDED      -------------------------------
                                                       DECEMBER 31,     SEPTEMBER 30,     SEPTEMBER 30,
                                                           1995             1995              1996
                                                       ------------     -------------     -------------
                                                                                   UNAUDITED
<S>                                                    <C>              <C>               <C>
REVENUE:
  Base rents (Note 2)................................    $567,000         $ 416,000         $ 533,000
  Tenant reimbursements..............................     188,000           144,000            62,000
                                                         --------          --------          --------
          Total revenue..............................     755,000           560,000           595,000
                                                         --------          --------          --------
CERTAIN EXPENSES:
  Maintenance and other operating expenses...........     154,000           108,000           118,000
  Utilities..........................................      40,000            26,000            20,000
  Real estate taxes..................................     111,000            83,000            83,000
                                                         --------          --------          --------
          Total certain expenses.....................     305,000           217,000           221,000
                                                         --------          --------          --------
REVENUE IN EXCESS OF CERTAIN EXPENSES................    $450,000         $ 343,000         $ 374,000
                                                         ========          ========          ========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-58
<PAGE>   3
 
                         700/800 BUSINESS CENTER DRIVE
 
          NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                               DECEMBER 31, 1995
 
1. BASIS OF PRESENTATION:
 
     The combined statement of revenue and certain expenses reflect the
operations of the Equivest Management, Inc. Acquisition Properties ("700/800
Business Center Drive") located in Horsham, Pennsylvania, which are expected to
be acquired by Brandywine Realty Trust (the "Company") from Equivest Management,
Inc. in November, 1996. The Acquisition Properties have aggregate net rentable
area of approximately 82,000 square feet and were 62% leased as of December 31,
1995. This combined statement of revenue and certain expenses is to be included
in the Company's registration statement on Form S-11 as the acquisition has been
deemed significant pursuant to the rules and regulations of the Securities and
Exchange Commission.
 
     The accounting records of 700/800 Business Center Drive are maintained on a
modified cash basis. Adjusting entries have been made to present the
accompanying financial statements in accordance with generally accepted
accounting principles. The accompanying financial statements exclude certain
expenses such as interest, depreciation and amortization, professional fees, and
other costs not directly related to the future operations of 700/800 Business
Center Drive.
 
     The combined statements of revenue and certain expenses for the nine months
ended September 30, 1996 and 1995, are unaudited. In the opinion of management,
all adjustments consisting solely of normal recurring adjustments necessary for
a fair presentation of the financial statements for the interim period have been
included. The results for the interim period are not necessarily indicative of
the results for the full year.
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expense during the reporting
period. The ultimate results could differ from those estimates.
 
2. OPERATING LEASES:
 
     Base rents presented for the year ended December 31, 1995, and the nine
months ended September 30, 1996 and 1995, include straight-line adjustments for
rental revenue increases in accordance with generally accepted accounting
principles. The aggregate rental revenue increase resulting from the
straight-line adjustments for the year ended December 31, 1995, and the nine
months ended September 30, 1996 and 1995, were $68,000, $76,000 (unaudited) and
$45,000 (unaudited), respectively.
 
     Tenants whose minimum rentals were equal to 10% or more of total base rents
in 1995 are as follows:
 
<TABLE>
        <S>                                                                 <C>
        Metpath, Inc......................................................  $310,000
        Macro Corporation.................................................   201,000
</TABLE>
 
     700/800 Business Center Drive are leased to tenants under operating leases
with expiration dates extending to the year 2012. Future minimum rentals under
noncancelable operating leases, excluding tenant reimbursements of operating
expenses as of December 31, 1995, were as follows:
 
<TABLE>
        <S>                                                                <C>
        1996.............................................................  $  414,000
        1997.............................................................     381,000
        1998.............................................................     508,000
        1999.............................................................     529,000
        2000.............................................................     474,000
        Thereafter.......................................................   7,056,000
</TABLE>
 
     Certain leases also include provisions requiring tenants to reimburse the
Company for management costs and other operating expenses up to stipulated
amounts.
 
                                      F-59

<PAGE>   1
                                                                Exhibit 10.4
 
                            BRANDYWINE REALTY TRUST
 
            PRO FORMA CONDENSED CONSOLIDATING FINANCIAL INFORMATION
 
     The following sets forth the pro forma condensed consolidating balance
sheet of Brandywine Realty Trust ("the Company) as of September 30, 1996, and
the pro forma condensed consolidating statements of operations for the year
ended December 31, 1995 and the nine-month period ended September 30, 1996.
 
     The unaudited pro forma condensed consolidating financial information is
presented as if the following transactions had been consummated on September 30,
1996, for balance sheet purposes, and at the beginning of the period presented,
for purposes of the statements of operations:
 
     - The Company consummated the Offering and applied the net proceeds
       therefrom as described under "Use of Proceeds". This pro forma condensed
       consolidating financial information should be read in conjunction with
       the historical financial statements of the Company, the SSI/TNC
       Properties, the LibertyView Building, and the Acquisition Properties
       (defined below) and the related notes thereto included elsewhere herein.
       In management's opinion, all adjustments necessary to reflect the effects
       of the transactions to be consummated have been made.
 
     - The Company issued 4,000,000 Common Shares at $16.50 per share.
 
     - The $774,000 loan from the RMO Fund was satisfied by the Company by the
       issuance of 46,321 Paired Units to the RMO Fund.
 
     - The Company acquired its partnership interests in the Operating
       Partnership.
 
     - The Operating Partnership acquired the 19 SSI/TNC Properties in
       connection with the SSI/TNC transaction.
 
     - The Company acquired the LibertyView Building.
 
     - In conjunction with the Offering the Company acquired the SERS
       Properties, Delaware Corporate Center I, 700/800 Business Center Drive,
       and 8000 Lincoln Drive (hereinafter referred to as the "Acquisition
       Properties") for $26,444,000 of Preferred Shares, $3,225,000 of deferred
       payments, $56,000 of warrants and $24,293,000 of cash.
 
     - The Company will contribute the net proceeds from the Offering to the
       Operating Partnership in exchange for 4,000,000 GP Units.
 
     - The Company will issue 636,363 Common Shares at $16.50 per share to SERS
       Voting Trust, in exchange for $10.5 million and contribute such proceeds
       to the Operating Partnership in exchange for 636,363 GP Units.
 
     - Following the Offering and the application of the net proceeds therefrom,
       the Operating Partnership will repay $47,868,000 of indebtedness secured
       by the Properties, $764,000 of loans made by SSI to the Operating
       Partnership and a $500,000 prepayment penalty.
 
     - The Company will issue 709,090 Common Shares at $16.50 per share in the
       Morgan Stanley Private Placement and contribute the proceeds to the
       Operating Partnership in exchange for 709,090 GP Units.
 
     The pro forma condensed consolidating financial information is unaudited
and is not necessarily indicative of what the actual financial position would
have been at September 30, 1996, nor does it purport to represent the future
financial position and the results of operations of the Company.
 
                                       F-3
<PAGE>   2
 
                            BRANDYWINE REALTY TRUST
 
                PRO FORMA CONDENSED CONSOLIDATING BALANCE SHEET
 
                    AS OF SEPTEMBER 30, 1996 (NOTES 1 AND 2)
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                   BRANDYWINE
                                                  REALTY TRUST                          PRO FORMA
                                                   HISTORICAL         ACQUISITION       OFFERING          PRO FORMA
                                                 CONSOLIDATED(A)     PROPERTIES(B)     ADJUSTMENTS       CONSOLIDATED
                                                 ---------------     -------------     -----------       ------------
<S>                                              <C>                 <C>               <C>               <C>
ASSETS:
  Real estate investments, net.................     $  98,818          $  52,853        $      --          $151,671
  Cash and cash equivalents....................         1,859            (24,293)          31,147(C)          8,713
  Escrowed cash................................           966              1,355             (145)(D)         2,176
  Deferred costs, net..........................         2,290                 --              355(E)          2,645
  Other assets.................................         2,250               (190)              --             2,060
                                                     --------            -------          -------          --------
          Total assets.........................     $ 106,183          $  29,725        $  31,357          $167,265
                                                     ========            =======          =======          ========
LIABILITIES:
  Mortgages and notes payable..................     $  83,020          $   3,225        $ (49,406)(F)      $ 36,839
  Other liabilities............................         3,096                 --             (745)(G)         2,351
                                                     --------            -------          -------          --------
          Total liabilities....................        86,116              3,225          (50,151)           39,190
                                                     --------            -------          -------          --------
MINORITY INTEREST..............................         8,758                 --           (8,233)(H)           525
                                                     --------            -------          -------          --------
Convertible Preferred Shares...................            --             26,444               --            26,444
                                                     --------            -------          -------          --------
BENEFICIARIES' EQUITY:
  Common shares of beneficial interest.........             9                 --               54(I)             63
  Additional paid-in capital...................        20,443                 --           89,439(J)        109,882
  Stock warrants...............................           658                 56              248(K)            962
  Accumulated equity (deficit).................        (9,801)                --               --            (9,801)
                                                     --------            -------          -------          --------
          Total beneficiaries' equity..........        11,309                 56           89,741           101,106
                                                     --------            -------          -------          --------
          Total liabilities and beneficiaries'
            equity.............................     $ 106,183          $  29,725        $  31,357          $167,265
                                                     ========            =======          =======          ========
</TABLE>
 
The accompanying notes and management assumptions are an integral part of these
                                  statements.
 
                                       F-4
<PAGE>   3
 
                            BRANDYWINE REALTY TRUST
 
           PRO FORMA CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
              FOR THE YEAR ENDED DECEMBER 31, 1995 (NOTES 1 AND 3)
                                  (UNAUDITED)
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                             TOTAL
                                                           ADJUSTED
                                                            SSI/TNC
                                                          PROPERTIES
                                          BRANDYWINE          AND
                                            REALTY        LIBERTYVIEW        TOTAL
                                            TRUST          BUILDING        ADJUSTED
                                          HISTORICAL       COMBINED       ACQUISITION    PRO FORMA           TOTAL PRO
                                         CONSOLIDATED     HISTORICAL      PROPERTIES      OFFERING             FORMA
                                             (A)              (B)             (C)        ADJUSTMENT         CONSOLIDATED
                                         ------------    -------------    -----------    ----------         ------------
<S>                                      <C>             <C>              <C>            <C>                <C>
Revenue:
  Base rents...........................    $  3,517         $ 8,948         $ 6,348       $     --           $   18,813
  Tenant reimbursements................          66           3,430             450             --                3,946
  Other................................          83               3              --             --                   86
                                             ------         -------          ------        -------              -------
          Total revenue................       3,666          12,381           6,798             --               22,845
                                             ------         -------          ------        -------              -------
Operating expenses:
  Interest.............................         793           6,700             258         (4,355)(D)            3,396
  Depreciation and amortization........       1,402           4,090           1,691            415(E)             7,598
  Property expenses....................       1,608           4,222           3,408            891(G)            10,129
  General and administrative...........         682             670              --           (562)(H)              790
                                             ------         -------          ------        -------              -------
          Total operating expenses.....       4,485          15,682           5,357         (3,611)              21,913
                                             ------         -------          ------        -------              -------
          Income (loss) before minority
            interest...................        (819)         (3,301)          1,441          3,611                  932
Minority interest in income (loss).....           5          (1,182)             --          1,307(F)               130
                                             ------         -------          ------        -------              -------
Income (loss) before uncombined entity
  and extraordinary items..............        (824)         (2,119)          1,441          2,304                  802
Equity income of management company....          --             179              --           (107)(I)               72
                                             ------         -------          ------        -------              -------
Income (loss) before extraordinary
  items................................        (824)         (1,940)          1,441          2,197                  874
Income allocated to Preferred Shares...          --              --              --          2,248(J)             2,248
                                             ------         -------          ------        -------              -------
Income (loss) allocated to
  Common Shares........................    $   (824)        $(1,940)        $ 1,441       $    (51)          $   (1,374)
                                             ======         =======          ======        =======              =======
Earnings (loss) per share before
  extraordinary items:.................
  Income (loss) before extraordinary
     items.............................    $  (1.32)                                                         $     0.14
                                             ======                                                             =======
  Income (loss) allocated to Common
     Shares............................    $  (1.32)                                                         $    (0.22)
                                             ======                                                             =======
Weighted average number of shares
  outstanding including share
  equivalents..........................     624,791                                                           6,309,016
                                             ======                                                             =======
</TABLE>
 
The accompanying notes and management assumptions are an integral part of these
                                  statements.
 
                                       F-5
<PAGE>   4
 
                            BRANDYWINE REALTY TRUST
 
           PRO FORMA CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
       FOR THE NINE-MONTH PERIOD ENDED SEPTEMBER 30, 1996 (NOTES 1 AND 3)
                                  (UNAUDITED)
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                             TOTAL
                                                           ADJUSTED
                                                            SSI/TNC
                                                          PROPERTIES
                                          BRANDYWINE          AND
                                            REALTY        LIBERTYVIEW        TOTAL
                                            TRUST          BUILDING        ADJUSTED
                                          HISTORICAL       COMBINED       ACQUISITION    PRO FORMA           TOTAL PRO
                                         CONSOLIDATED     HISTORICAL      PROPERTIES      OFFERING             FORMA
                                             (A)              (B)             (C)        ADJUSTMENT         CONSOLIDATED
                                         ------------    -------------    -----------    ----------         ------------
<S>                                      <C>             <C>              <C>            <C>                <C>
Revenue:
  Base rents...........................    $  4,063         $ 5,714         $ 5,828       $     --           $   15,605
  Tenant reimbursements................         467           2,511             277             --                3,255
  Other................................          69             100              --             --                  169
                                            -------         -------          ------        -------            ---------
                                              4,599           8,325           6,105             --               19,029
                                            -------         -------          ------        -------            ---------
Operating expenses:
  Interest.............................       1,342           3,783             194         (2,746)(D)            2,573
  Depreciation and amortization........       1,173           2,819           1,268            311(E)             5,571
  Property expenses....................       1,867           2,831           2,724            605(G)             8,027
  General and administrative...........         439             715              --           (567)(H)              587
                                            -------         -------          ------        -------            ---------
          Total operating expenses.....       4,821          10,148           4,186         (2,397)              16,758
                                            -------         -------          ------        -------            ---------
          Income (loss) before minority
            interest...................        (222)         (1,823)          1,919          2,397                2,271
Minority interest in income (loss).....         (40)           (513)                           737(F)               184
                                            -------         -------          ------        -------            ---------
Income (loss) before uncombined entity
  and extraordinary items..............        (182)         (1,310)          1,919          1,660                2,087
Equity income of management company....          54              75                            115(I)               244
                                            -------         -------          ------        -------            ---------
Income (loss) before extraordinary
  items................................    $   (128)        $(1,235)        $ 1,919       $  1,775           $    2,331
Income (loss) allocated to Preferred
  Shares...............................          --              --              --          1,686(J)             1,686(I)
                                            -------         -------          ------        -------            ---------
Income (loss) allocated to Common
  Shares...............................    $   (128)        $(1,235)        $ 1,919       $     89           $      645
                                            =======         =======          ======        =======            =========
Earnings per common share before
  extraordinary items..................
  Income (loss) before extraordinary
     items.............................    $  (0.19)                                                         $     0.37
                                            =======                                                           =========
  Income (loss) allocated to Common
     Shares............................    $  (0.19)                                                         $     0.10
                                            =======                                                           =========
Weighted average number of shares
  outstanding..........................     676,801                                                           6,308,053(K)
                                            =======                                                           =========
</TABLE>
 
The accompanying notes and management assumptions are an integral part of these
                                  statements.
 
                                       F-6
<PAGE>   5
 
                            BRANDYWINE REALTY TRUST
 
                     NOTES AND MANAGEMENT'S ASSUMPTIONS TO
                  UNAUDITED PRO FORMA CONDENSED CONSOLIDATING
                             FINANCIAL INFORMATION
               (IN THOUSANDS, EXCEPT SHARE AND PER-SHARE AMOUNTS)
 
1. BASIS OF PRESENTATION:
 
     Brandywine Realty Trust (the "Company") is a Maryland real estate
investment trust. As of September 30, 1996, the Company owned interests in 24
properties, consisting of 23 suburban office buildings in three states and one
industrial property. The Company is the sole general partner and has an
approximately 59% interest in Brandywine Operating Partnership, L.P. (the
"Operating Partnership"). The minority interests in the Operating Partnership
include TNC and other owners, and SSI, which have ownership interests of 31% and
10%, respectively.
 
     These pro forma financial statements should be read in conjunction with the
historical financial statements and notes thereto of the Company, the SSI/TNC
Properties, the LibertyView Building and the Acquisition Properties included
elsewhere herein. In management's opinion, all adjustments necessary to reflect
the effects of the Offering and the Concurrent Investments, the acquisitions of
the SSI/TNC Properties, the LibertyView Building and the Acquisition Properties
by the Company have been made.
 
2. ADJUSTMENTS TO PRO FORMA CONDENSED CONSOLIDATING BALANCE SHEET:
 
     (A) Reflects the historical consolidated balance sheet of the Company as of
September 30, 1996.
 
     Acquisition Properties
 
     (B) Reflects the combined balance sheets of the acquisitions of the
Acquisition Properties as follows:
 
<TABLE>
<CAPTION>
                                                           DELAWARE     700/800
                                                          CORPORATE    BUSINESS      8000
                                              SERS          CENTER      CENTER      LINCOLN
                                          PROPERTIES(i)     I(ii)      DRIVE(ii)   DRIVE(ii)   COMBINED
                                          -------------   ----------   ---------   ---------   --------
    <S>                                   <C>             <C>          <C>         <C>         <C>
    Real estate investments, net........     $29,496       $  12,954    $  7,313    $  3,090   $ 52,853
    Cash and cash equivalents...........      (1,126)        (12,839)     (7,263)     (3,065)   (24,293)
    Other assets........................          --            (115)        (50)        (25)      (190)
    Escrowed cash.......................       1,355              --          --          --      1,355
                                             -------        --------     -------     -------   --------
              Total assets..............     $29,725       $      --    $     --    $     --   $ 29,725
                                             =======        ========     =======     =======   ========
    Liabilities:
      Mortgages and notes payable.......     $ 3,225       $      --    $     --    $     --   $  3,225
                                             -------        --------     -------     -------   --------
              Total liabilities.........       3,225              --          --          --      3,225
                                             -------        --------     -------     -------   --------
    Convertible Preferred Shares........      26,444              --          --          --     26,444
                                             -------        --------     -------     -------   --------
              Total beneficiaries'
                equity..................          56              --          --          --         56
                                             -------        --------     -------     -------   --------
              Total liabilities and
                beneficiaries' equity...     $29,725       $      --    $     --    $     --   $ 29,725
                                             =======        ========     =======     =======   ========
</TABLE>
 
- ---------------
(i) The purchase price for the SERS Properties consists of: (i) 481,818 Series A
    Preferred Shares, convertible, under certain circumstances, into 1,606,060
    Common Shares; (ii) two year warrants to purchase 133,333 Common Shares at
    an exercise price of $25.50 per share and based on a $.42 per warrant value
    (based on a modified Black Scholes calculation); and (iii) deferred payments
    aggregating $3.8 million, of which $2.5 million is payable in June 1998 and
    $1.3 million is due in December 1999. The Company recorded a $575 adjustment
    to the purchase price to reflect the fair value of the deferred payments. In
    addition, closing costs of $1,126 have been capitalized to real estate
    investments, net.
 
                                       F-7
<PAGE>   6
 
(ii) Reflects the Company's acquisition of these properties based upon the
     purchase price plus closing costs as follows:
 
<TABLE>
<CAPTION>
                                                              PURCHASE     CLOSING
                                                               PRICE        COSTS       TOTAL
                                                              --------     -------     -------
    <S>                                                       <C>          <C>         <C>
    Delaware Corporate Center I.............................  $ 12,700      $ 254      $12,954
    700/800 Business Center Drive...........................     7,100        213        7,313
    8000 Lincoln Drive......................................     3,000         90        3,090
                                                               -------       ----      -------
                                                              $ 22,800      $ 557      $23,357
                                                               =======       ====      =======
</TABLE>
 
     Offering
 
     (C) Pro forma cash and cash equivalents were determined as follows:
 
<TABLE>
<S>    <C>                                                                   <C>
       - Net proceeds from this Offering after underwriting discounts and
         commissions and estimated Offering expenses of $6,870.............  $ 59,130
       - Net proceeds from the Morgan Stanley Private Placement............    11,700
       - Net proceeds from the SERS Private Placement......................    10,500
       - Repayment of mortgages and notes payable including related
         costs.............................................................   (49,132)
       - Payment of commitment fee on the Credit Facility..................      (875)
       Other cash activities --
       - Release of escrowed cash resulting from the repayment of mortgage
       notes payable.......................................................       145
       - Payment of accrued interest.......................................      (321)
                                                                             --------
       - Net increase in cash and cash equivalents.........................  $ 31,147
                                                                             ========
(D)    Release of escrowed cash resulting from the repayment of mortgage
       notes payable.......................................................  $   (145)
                                                                             ========
(E)    Reflects the net increase in deferred financing costs as follows:
       - Credit Facility...................................................  $    875
       - Elimination of previously deferred costs..........................      (424)
       - Repayment of mortgage notes.......................................       (96)
                                                                             --------
                                                                             $    355
                                                                             ========
(F)    Reflects the net decrease in mortgages and notes payable:
       - Repayment of mortgages and notes payable from net proceeds of this
         Offering..........................................................  $(48,632)
       - Payment of the note payable to the RMO Fund through the issuance
       of Paired Units.....................................................      (774)
                                                                             --------
                                                                             $(49,406)
                                                                             ========
(G)    Reflects the payment of accrued interest in connection with the
       repayment of mortgages and notes payable and payment of previously
       deferred costs......................................................  $   (745)
                                                                             ========
(H)    Reflects the reduction of minority interest upon the Company's
       equity contribution of the net proceeds from the Offering to the
       Operating Partnership and $22.2 million of net proceeds from the
       private placement and the issuance of Common Shares. Upon making
       this contribution, the Company will receive 5,345,453 GP Units which
       will increase its ownership percentage to 94%.......................  $ (8,233)
                                                                             ========
(I)    Par value of the Common Shares to be issued.........................  $     54
                                                                             ========
</TABLE>
 
                                       F-8
<PAGE>   7
 
<TABLE>
<S>    <C>                                                                   <C>
(J)    Reflects (i) the issuance of 4,000,000 Common Shares, par value of $.01 per
       share, at the offering price of $16.50 per share; (ii) the issuance of 709,090
       Common Shares, at $16.50 per share in the Morgan Stanley private placement;
       (iii) the issuance of 636,363 Common Shares at the offering price of $16.50
       per share to SERS Voting Trust in connection with the SERS Private Placement;
       and (iv) the issuance of 46,321 Paired Units to the RMO Fund. The following
       table sets forth the adjustments to additional paid-in capital:
       - Net proceeds from the Offering of Common Shares after
         underwriting discounts and commissions and Offering
         expenses.................................................  $59,130
                                                                    -------
       Less: Adjusted par value of Common Shares at $.01 par......      (40)    $59,090
                                                                    -------     -------
       - Net proceeds from the Concurrent Investments net of par
       value of $13...............................................               22,187
       - Write-off of deferred financing costs....................                  (96)
       - Additional capital contribution to the Operating
         Partnership..............................................                8,233
       - Prepayment of note payable to the RMO Fund, net of par
       value of $1................................................                  525
       - Prepayment penalty.......................................                 (500)
                                                                                -------
       Net increase in additional paid-in capital.................              $89,439
                                                                                =======
(K)    Reflects the issuance of 46,321 warrants to the RMO Fund,
       based on a $5.40 per warrant value (based on a modified
       Black Scholes calculation).................................              $   248
                                                                                =======
</TABLE>
 
3. ADJUSTMENTS TO PRO FORMA CONDENSED
   CONSOLIDATING STATEMENTS OF OPERATIONS:
 
     (A)   Reflects the historical consolidated operations of the Company.
 
     SSI/TNC Transaction and Liberty View Building Acquisition
 
     (B)   Reflects the adjusted historical operations of the SSI/TNC Properties
           which were acquired on August 22, 1996 and LibertyView Building which
           was acquired on July 19, 1996. The historical operations of the
           SSI/TNC Properties exclude the extraordinary gains on restructuring
           of debt of $5,559 and $494 for the year ended December 31, 1995 and
           the nine-month period ended September 30, 1996, respectively.
 
                                       F-9
<PAGE>   8
 
FOR THE YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                             TOTAL ADJUSTED
                                                                                                SSI/TNC
                                                                                               PROPERTIES
                                                                                                  AND
                                              SSI/TNC                                         LIBERTYVIEW
                                             PROPERTIES     LIBERTYVIEW                         BUILDING
                                             HISTORICAL       BUILDING        PRO FORMA         COMBINED
                                              COMBINED       HISTORICAL      ADJUSTMENTS       HISTORICAL
                                             ----------     ------------     -----------     --------------
<S>                                          <C>            <C>              <C>             <C>
Revenue:
  Base rents...............................   $  7,829         $1,119          $    --          $  8,948
  Tenant reimbursements....................      2,895            535               --              3430
  Management fees..........................        617             --             (617)(iv)           --
  Other....................................          3             --               --                 3
                                              ---------        ------          --------         --------
     Total revenue.........................     11,344          1,654             (617)           12,381
                                              ---------        ------          --------         --------
Operating expenses:
  Interest.................................      5,855             --              845(i)          6,700
  Depreciation and amortization............      4,336             --             (246)(ii)        4,090
  Property expenses........................      3,424            798               --             4,222
  General and administrative...............      1,108             --             (438)(iv)          670
                                              ---------        ------          -------          --------
     Total operating expenses..............     14,723            798              161            15,682
     Income (loss) before minority
       interest............................     (3,379)           856             (778)           (3,301)
Minority interest in income (loss).........         --             --           (1,182)(iii)      (1,182)(iii)
                                              ---------        ------          -------          --------
Income (loss) before uncombined entity and
  extraordinary items......................     (3,379)           856              404            (2,119)
Equity income of management company........         --             --              179               179
                                              ---------        ------          -------          --------
Income (loss) before extraordinary items...   $ (3,379)        $  856          $   583          $ (1,940)
                                              ========         ======          =======          ========
</TABLE>
 
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996
 
<TABLE>
<CAPTION>
                                                                                                 TOTAL
                                                                                                ADJUSTED
                                                                                                SSI/TNC
                                             SSI/TNC                                         PROPERTIES AND
                                            PROPERTIES      LIBERTYVIEW                       LIBERTYVIEW
                                            HISTORICAL        PROPERTY                          BUILDING
                                             COMBINED        HISTORICAL       PRO FORMA         COMBINED
                                           THRU 8/22/96     THRU 7/19/96     ADJUSTMENTS       HISTORICAL
                                           ------------     ------------     -----------     --------------
<S>                                        <C>              <C>              <C>             <C>
Revenue:
  Base rents.............................    $  5,059          $  655          $    --          $  5,714
  Tenant reimbursements..................       2,250             261               --             2,511
  Management fees........................         778              --             (778)(iv)           --
  Other..................................         100              --               --               100
                                             --------          ------          -------          --------
     Total revenue.......................       8,187             916             (778)            8,325
                                             --------          ------          -------          -------- 
Operating expenses:
  Interest...............................       3,322              --              461(i)          3,783
  Depreciation and amortization..........       2,717              --              102(ii)         2,819
  Property expenses......................       2,831              --               --             2,831
  General and administrative.............         599             399             (283)(iv)          715
                                             --------          ------          -------          --------
     Total operating expenses............       9,469             399              280            10,148
     Income (loss) before minority
       interest..........................      (1,282)            517           (1,058)           (1,823)
Minority interest in income (loss).......          --              --             (513)(iii)        (513)
                                             --------          ------          ---------        --------
Income (loss) before uncombined entity
  and extraordinary items................      (1,282)            517             (545)           (1,310)
Equity income of management company......          --              --               75(iv)            75
                                             --------          ------          ---------        --------
Income (loss) before extraordinary
  items..................................    $ (1,282)         $  517          $  (470)         $ (1,235)
                                             ========          ======          =======          ========
</TABLE>
 
                                      F-10
<PAGE>   9
 
<TABLE>
<CAPTION>
                                                                                               FOR THE
                                                                                             PERIOD FROM
                                                                                           JANUARY 1, 1996
                                                                                               TO THE
                                                                          FOR THE            RESPECTIVE
                                                                        YEAR ENDED           ACQUISITION
                                                                     DECEMBER 31, 1995          DATE
                                                                     -----------------     ---------------
      <S>  <C>                                                       <C>                   <C>
          (i) Reflects the increase in interest expense resulting
              from:
      -    the Note payable to SSI (which bears interest at
           prime) assuming a prime rate of 8.25%.................          $  33                $  21
      -    the Mortgage and notes payable of the LibertyView
           Building, with effective rates of 8% per annum........            750                  406
      -    the Note payable to the RMO fund (which bears interest
           at prime) assuming a prime rate of 8.25%..............             62                   34
                                                                           -----                -----
                                                                           $ 845                $ 461
                                                                           =====                =====
        (ii) Reflects the (decrease) increase in depreciation and
             amortization as follows:
      -    Depreciation of capitalized costs from the SSI/TNC
           Transaction included in real estate investments.......          $  33                $  24
      -    Depreciation of buildings acquired over a 25-year
           useful life and tenant improvements and other
           furniture, fixtures and equipment (FF&E) over five
           years in general......................................           (563)                 (76)
      -    Depreciation of the LibertyView Building over a
           35-year useful life...................................            244                  132
      -    Amortization of deferred financing costs related to
           the LibertyView Building..............................             40                   22
                                                                           -----                -----
                                                                           $(246)               $ 102
                                                                           =======              =====
</TABLE>
 
     (iii)  Minority interest in income (loss) has been reflected in accordance
            with the terms of the Operating Partnership Agreement. As of
            September 30, 1996, the Company owns 59% of the Operating
            Partnership. The remaining 41% of the Operating Partnership is owned
            by TNC, SSI and the other owners whose interests are reflected as
            minority interest. The adjustments to record the income effect of
            minority interest share of loss for the periods ended December 31,
            1995, and September 30, 1996, in the pro forma statements of
            operations were computed as follows:
 
<TABLE>
<CAPTION>
                                                       FOR THE               FOR THE
                                                      YEAR ENDED           NINE-MONTHS
                                                     DECEMBER 31,             ENDED
                                                         1995           SEPTEMBER 30, 1996
                                                     ------------       ------------------
          <S>                                        <C>                <C>
          SSI/TNC Properties loss before Minority
            Interest...............................    $ (3,379)             $ (1,282)
          Impact of pro forma adjustments..........         497                    31
                                                       --------              --------
                    Total loss.....................    $ (2,882)             $ (1,251)
                                                       ========              ========
          Pro forma minority interest in loss
            (41%)..................................    $ (1,182)             $   (513)
                                                       ========              ========
</TABLE>
 
     (iv)   Reflects the results of operations of the Management Company from
            third party management services as accounted for using the equity
            method.
 
     Acquisition Properties
 
     (C) Reflects the combined pro forma statements of operations of the
         Acquisition Properties for the year ended December 31, 1995 and the
         nine months ended September 30, 1996, respectively.
 
                                      F-11
<PAGE>   10
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                              DELAWARE         700/800
                                 SERS         CORPORATE        BUSINESS       8000 LINCOLN      PRO FORMA      COMBINED
                             PROPERTIES(i)   CENTER I(i)   CENTER DRIVE(i)      DRIVE(i)     ADJUSTMENTS(ii)    TOTAL
                             -------------   -----------   ----------------   ------------   ---------------   --------
<S>                          <C>             <C>           <C>                <C>            <C>               <C>
Revenue:
  Base rents................    $ 4,366         $ 410            $567            $1,005          $    --        $6,348
  Tenant reimbursements.....        238            --             188                24               --           450
                                 ------         -----            ----              ----         --------        ------
                                  4,604           410             755             1,029               --         6,798
                                 ------         -----            ----              ----         --------        ------
Operating expenses:
  Interest..................         --            --              --                --              258(ii)       258
  Depreciation and
    amortization............         --            --              --                --            1,691(iii)    1,691
  Property expenses.........      2,236           502             305               365               --         3,408
                                 ------         -----            ----              ----         --------        ------
    Total operating
      expenses..............      2,236           502             305               365            1,949         5,357
                                 ------         -----            ----              ----         --------        ------
    Income (loss) before
      minority interest.....    $ 2,368         $ (92)           $450            $  664          $(1,949)       $1,441
                                 ======         =====            ====              ====         ========        ======
</TABLE>
 
                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996
 
<TABLE>
<CAPTION>
                                              DELAWARE         700/800
                                 SERS         CORPORATE        BUSINESS       8000 LINCOLN      PRO FORMA      COMBINED
                             PROPERTIES(i)   CENTER I(i)   CENTER DRIVE(i)      DRIVE(i)     ADJUSTMENTS(ii)    TOTAL
                             -------------   -----------   ----------------   ------------   ---------------   --------
<S>                          <C>             <C>           <C>                <C>            <C>               <C>
Revenue:
  Base rents................    $ 3,435        $ 1,666           $533             $194           $    --        $5,828
  Tenant reimbursements.....        213             --             62                2                --           277
                                 ------          -----           ----             ----          --------        ------
                                  3,648          1,666            595              196                --         6,105
                                 ------          -----           ----             ----          --------        ------
Operating expenses:
  Interest..................         --             --             --               --               194(ii)       194
  Depreciation and
    amortization............         --             --             --               --             1,268(iii)    1,268
  Property expenses.........      1,862            452            221              189                --         2,724
                                 ------          -----           ----             ----          --------        ------
    Total operating
      expenses..............      1,862            452            221              189             1,462         4,186
                                 ------          -----           ----             ----          --------        ------
    Income (loss) before
      minority interest.....    $ 1,786        $ 1,214           $374             $  7           $(1,462)       $1,919
                                 ======          =====           ====             ====          ========        ======
</TABLE>
 
- ---------------
 (i) Reflects the historical operations of the Acquisition Properties, excluding
     certain expenses such as interest, depreciation and amortization,
     professional costs, and other costs not directly related to the future
     operations of the Acquisition Properties.
 
(ii) Reflects the interest on the note payable to the Seller of the SERS
     Properties using an effective rate of 8%.
 
(iii) Reflects the depreciation of the Acquisition Properties using a 25-year
      useful life.
 
                                      F-12
<PAGE>   11
 
<TABLE>
<CAPTION>
                                                           FOR THE
                                                         YEAR ENDED           FOR THE
                                                          DECEMBER          NINE-MONTHS
                                                             31,               ENDED
Offering                                                    1995         SEPTEMBER 30, 1996
                                                         -----------     ------------------
<S>   <C>                                                <C>             <C>

(D)   Reflects the net reduction of interest expense
      associated with the mortgages and notes payable
      assumed to be repaid using net proceeds from the
      Offering. .......................................    $(4,355)           $ (2,746)
                                                         -----------        ----------
(E)   Reflects the net increase in amortization of
      deferred financing costs related to the mortgage
      notes paid off and the new Credit Facility. .....    $   415            $    311
                                                         -----------        ----------
(F)   Reflects adjustment for minority interest in the
      Operating Partnership of 6%. ....................    $ 1,307            $    737
                                                         -----------        ----------
(G)   To record management fees charged by the
      Management Company. .............................    $   891            $    605
                                                         -----------        ----------
(H)   To transfer general and administrative expenses
      to the Management Company. ......................    $  (562)           $   (567)
                                                         -----------        ----------
(I)   To record share of income (loss) from the
      Management Company...............................    $  (107)           $    115
                                                         -----------        ----------
(J)   To record dividends on 481,818 Preferred Shares
      at an annual rate of $4.67 per share. ...........    $ 2,248            $  1,686
                                                         -----------        ----------
(K)   Reflects the weighted average number of Common
      Shares outstanding including share equivalents.
      If all Units (509,856) were converted as of
      January 1, 1995, the weighted average number of
      shares outstanding would have been 6,818,872 and
      6,817,910, respectively. ........................
</TABLE>
 
                                      F-13

<PAGE>   1
                                                                Exhibit 10.5
 
                            BUSINESS AND PROPERTIES
 
GENERAL
 
     The Initial Properties include 23 suburban office buildings (22 of which
are Class A properties) totalling approximately 12 million net rentable square
feet and one Class A industrial facility (1510 Gehman Road) totalling
approximately 152,000 net rentable square feet. The Company developed 19 of the
Initial Properties and currently manages 23 of the Initial Properties, in
addition to managing approximately 575,000 net rentable square feet on behalf of
third parties and approximately 159,000 net rentable square feet at the four
Option Properties. In addition to owning the Initial Properties, the Company, on
November 14, 1996, acquired the SERS Properties, which consist of seven office
buildings and two industrial facilities, and has entered into agreements to
purchase the four other Acquisition Properties. The Properties are located in
the Market, with the exception of: (i) the Twin Forks Office Park located in
Raleigh, North Carolina, which was acquired by the Company in 1986 in connection
with the Company's formation; (ii) 168 Franklin Corner Road located in
Lawrenceville, New Jersey; and (iii) Delaware Corporate Center (an Acquisition
Property) located in New Castle County, Delaware. The Properties are easily
accessible from major thoroughfares and are in close proximity to numerous
amenities, including restaurants, retail shopping malls, hotels and banks. The
Properties contain an aggregate of approximately 2.0 million net rentable square
feet and, as of September 30, 1996, were approximately 94.3% leased to 222
tenants. The Company's tenants include many service sector employers, as well as
a large number of professional firms and local, national and foreign businesses.
The Company believes, based in part on recent engineering reports, that all of
its Properties are well maintained and do not require significant capital
improvements.
 
     The Properties consist primarily of suburban and industrial buildings (36
of which are Class A properties). The Company considers Class A suburban office
and industrial properties to be those that have desirable locations, are well
maintained and professionally managed and have the potential of achieving rental
and occupancy rates that are typically at or above those prevailing in their
respective markets. The average age of the Properties is approximately 10.8
years. The Company's 10 largest tenants (based on pro forma annualized base rent
at September 30, 1996) aggregate approximately 29.8% of the Company's total base
rent and approximately 27.5% of the Company's net rentable square feet and have
a weighted average remaining lease term of approximately 7.8 years. As of
September 30, 1996, no single tenant accounted for more than approximately 8.7%
of the Company's pro forma aggregate annualized base rent and only 30 tenants
individually represented more than 1.0% of such aggregate annualized base rent.
 
     Leases representing approximately 58.5% of the net rentable square footage
at the Properties were signed during the period January 1, 1993 through December
31, 1995, a time when management believes market rental rates were at or below
current market rental rates. This belief is supported by the fact that for the
nine months ended September 30, 1996: (i) renewal leases at the Initial
Properties were signed covering approximately 154,000 net rentable square feet
of office space at a weighted average rental rate of $13.25 per square foot,
compared to leases that expired for that space during such period with a
weighted average rental rate of $12.66 per square foot (representing a 4.7%
increase); and (ii) new leases at the Initial Properties were signed covering
approximately 264,000 net rentable square feet of office space at a weighted
average rental rate of $15.96 per square foot, compared to leases that expired
for that space during such period with a weighted average rental rate of $14.52
per square foot (representing a 9.9% increase). In all cases, weighted average
rental rates include expense recoveries, free rent and scheduled rent increases
that would be taken into account under generally accepted accounting principles.
The Company believes that the strength of its leasing department and tenant
retention capabilities should enable it to continue to capitalize on rental rate
differentials as the Company's leases expire.
 
     The Company's leases are typically structured for terms of three, five,
seven or ten years. Due to conditions within the Market, the Company utilizes
two primary lease structures: (i) triple net leases (which represented
approximately 75.0% of the aggregate net rentable leased square footage at the
Initial Properties as of September 30, 1996 and under which tenants are required
to pay all real property taxes, insurance and expenses of maintaining the leased
space); and (ii) full service gross leases (which represented approximately
25.0% of the aggregate leased net rentable square footage as of September 30,
1996 and under which the tenants typically pay for all real estate taxes and
operating expenses above those for an established base year).
 
                                       63
<PAGE>   2
 
     Under the Company's leases at the Initial Properties, the landlord is
generally responsible for structural repairs. Most leases do not permit early
termination; however, approximately 12 leases at the Initial Properties
(covering an aggregate of approximately 184,000 net rentable square feet and
having a weighted average base rental rate of approximately $11.53) permit the
tenant to terminate the lease prior to its initial term (excluding rights
pursuant to casualty, condemnation, eminent domain and changes in zoning
classifications) (generally upon six to twelve months' notice and generally
after the end of the third year of a five year lease or the fifth year of a 10
year lease, subject to the tenant's obligation to pay a fixed termination
penalty, typically consisting of unamortized tenant improvements, leasing
commissions plus an additional negotiated payment). Approximately eight leases
at the Acquisition Properties (covering an aggregate of approximately 94,000 net
rentable square feet and having a weighted average base rental rate of
approximately $14.10) similarly permit the tenant to terminate the lease prior
to its initial term.
 
     The Company's asset management strategy is designed to efficiently balance
the sound business and reporting fundamentals necessary for a public company
with the operating efficiency of a responsive market-oriented real estate
organization.
 
     The Properties will be financially and operationally managed under active
central control. All financial reporting, administration (including the
formation and implementation of policies and procedures), marketing, leasing,
capital expenditure and construction decisions are administered at the Company's
corporate office. The Company employs asset managers to oversee and direct the
ongoing property operations, as well as the on-site personnel which may include
a property manager, leasing agent and other necessary staff. The asset managers
actively participate with the executive officers in the formation of the
Company's policies and procedures. In addition, the Company's financial and
property management reporting systems are designed to ensure operational
compliance with the Company's policies and procedures. On-site staffing for each
Property is determined by the Property's size, tenant profile and location
relative to other Properties. The Company has an active tenant relations program
and a maintenance staff to ensure that all of the Properties are maintained in
accordance with the Company's standard of excellence. The Company also contracts
with third parties for cleaning services, day porters, landscaping, engineering
and other service personnel necessary to operate each Property.
 
                                       64
<PAGE>   3
 
PROPERTIES
 
     The following table sets forth certain information with respect to the
Properties:
<TABLE>
<CAPTION>
                                                                                                       AVERAGE TOTAL BASE
                                                                                  TOTAL BASE RENT       RENT PLUS EXPENSE
                                                                                      FOR THE            RECOVERIES PER
                                                        NET      PERCENTAGE        TWELVE MONTHS       NET RENTABLE SQUARE
                                                     RENTABLE   LEASED AS OF           ENDED               FOOT LEASED
INITIAL PROPERTIES:                           YEAR    SQUARE    SEPTEMBER 30,  SEPTEMBER 30, 1996(2)      SEPTEMBER 30,
             SUBMARKET/PROPERTY               BUILT    FEET        1996(1)            (000'S)                1996(3)
- --------------------------------------------- -----  ---------  -------------  ---------------------   -------------------
<S>                                           <C>    <C>        <C>            <C>                     <C>
HORSHAM/WILLOW GROVE/JENKINTOWN, PA
 650 Dresher Road............................  1984     30,138      100.0%            $   329                $ 15.67
 1155 Business Center Drive..................  1990     51,388       99.4%                591                  16.31
 500 Enterprise Road.........................  1990     67,800       98.5%                674                  13.74
 One Progress Avenue.........................  1986     79,204      100.0%                563                   9.54
SOUTHERN ROUTE 202 CORRIDOR, PA
 456 Creamery Way............................  1987     47,604      100.0%                336                   7.15
 486 Thomas Jones Way........................  1990     51,500       50.9%                416                  23.26
 468 Creamery Way............................  1990     28,934      100.0%                293                  14.54
 110 Summit Drive............................  1985     43,660       67.6%                262                  13.51
BLUE BELL/PLYMOUTH MEETING/FORT WASHINGTON,
PA
 2240/50 Butler Pike.........................  1984     52,183       99.4%                560                  15.82
 120 West Germantown Pike....................  1984     30,546      100.0%                421                  19.16
 140 West Germantown Pike....................  1984     25,953       98.7%                297                  16.56
 2260 Butler Pike............................  1984     31,892      100.0%                377                  16.84
MAIN LINE, PA
 16 Campus Boulevard.........................  1990     65,463      100.0%                430                   9.94
 18 Campus Boulevard.........................  1990     37,700      100.0%                410                  15.01
LEHIGH VALLEY, PA
 7310 Tilghman Street........................  1985     40,000       99.0%                329                  11.44
 7248 Tilghman Street........................  1987     42,863       93.8%                399                  15.06
 6575 Snowdrift Road.........................  1988     46,250      100.0%                300                   9.06
LANSDALE, PA
 1510 Gehman Road............................  1990    152,625      100.0%                773                   7.70
BURLINGTON COUNTY, NJ
 One Greentree Centre........................  1982     55,838      100.0%                869                  16.97
 Two Greentree Centre........................  1983     56,075      100.0%                816                  14.53
 Three Greentree Centre......................  1984     69,101       96.2%              1,049                  16.51
CAMDEN COUNTY, NJ
 457 Haddonfield Road (LibertyView)..........  1990    121,737       82.8%              1,160                  16.34
OTHER MARKETS
 168 Franklin Corner Road....................  1976     32,000       54.5%                186                  13.43
   Lawrenceville, NJ
 Twin Forks Office Park
   Raleigh, NC
 5910-6090 Six Forks.........................  1982     73,339      100.0%              1,008                  13.83
                                                     ---------      -----             -------                 ------
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR THE
 INITIAL PROPERTIES..........................        1,333,793       93.8%             12,848                  14.04(10)
                                                     =========      =====             =======                 ======
 
<CAPTION>
                                                    AVERAGE             C&W          RENTAL RATE        TENANTS LEASING 10% OR
                                                   ANNUALIZED         WEIGHTED         INCREASE            MORE OF RENTABLE
                                                     RENTAL           AVERAGE         POTENTIAL           SQUARE FOOTAGE PER
                                                   RATE AS OF         CLASS A        UNTIL MARKET           PROPERTY AS OF
INITIAL PROPERTIES:                              SEPTEMBER 30,         RENTAL          RATE IS            SEPTEMBER 30, 1996
             SUBMARKET/PROPERTY                     1996(4)           RATES(5)       ACHIEVED(6)       AND LEASE EXPIRATION DATE
- ---------------------------------------------  ------------------     --------       ------------      -------------------------
<S>                                           <<C>                    <C>            <C>               <C>
HORSHAM/WILLOW GROVE/JENKINTOWN, PA
 650 Dresher Road............................        $16.50            $18.02              9.2%        GMAC (100%) - 5/03
 1155 Business Center Drive..................         17.22             18.02              4.6%        IMS (79%) - 3/06;
                                                                                                       Motorola (14%) - 2/99
 500 Enterprise Road.........................         15.03             14.50             (3.5)%       Conti Mortgage
                                                                                                       (80%) - 4/01;
                                                                                                       Pioneer (19%) - 10/00
 One Progress Avenue.........................         11.75             18.02             53.4%        Reed Technologies
                                                                                                       (100%) - 6/11
SOUTHERN ROUTE 202 CORRIDOR, PA
 456 Creamery Way............................          7.25(7)           7.89(8)           8.8%        Neutronics (100%) - 1/03
 486 Thomas Jones Way........................         15.46             15.55              0.5%        First American Real
                                                                                                       Estate (20%) - 4/00
 468 Creamery Way............................         13.88             13.61             (1.9)%       Franciscan Health
                                                                                                       (82%) - 6/99;
                                                                                                       American Day Treatment
                                                                                                       (18%) - 6/00
 110 Summit Drive............................          7.20(8)           7.89(8)           9.6%        Maris Equipment
                                                                                                       (49%) - 4/99
BLUE BELL/PLYMOUTH MEETING/FORT WASHINGTON,
PA
 2240/50 Butler Pike.........................         17.55             18.70              6.6%        CoreStates (59%) - 4/06;
                                                                                                       TWA Marketing
                                                                                                       (33%) - 10/99
 120 West Germantown Pike....................         17.52             18.70              6.7%        Clair O'Dell
                                                                                                       (82%) - 7/01;
                                                                                                       Kleinerts (13%)  - 10/98
 140 West Germantown Pike....................         17.38             18.70              7.6%        Healthcare, Inc.
                                                                                                       (46%) - 9/99; Henkel
                                                                                                       (29%) - 6/98; National
                                                                                                       Health Equity
                                                                                                       (20%) - 5/99
 2260 Butler Pike............................         17.82             18.70              4.9%        Information Resources
                                                                                                       (66%) - 12/00; Med
                                                                                                       Resorts (26%) - 1/01
MAIN LINE, PA
 16 Campus Boulevard.........................         13.58             20.27             49.3%        New England Mutual
                                                                                                       (52%) - 5/06; Atlantic
                                                                                                       Employees C.U.
                                                                                                       (35%) - 1/06
 18 Campus Boulevard.........................         18.62             20.27              8.9%        Prudential (25%) - 6/01;
                                                                                                       Devco Mutual
                                                                                                       (35%) - 1/01;
                                                                                                       Scott Paper
                                                                                                       (17%) - 11/97;
                                                                                                       Marshall Dennehey
                                                                                                       (18%) - 10/01
LEHIGH VALLEY, PA
 7310 Tilghman Street........................          8.89(8)          10.50(8)          18.1%        AT&T (83%)  - 12/96-8/98
 7248 Tilghman Street........................         14.76             15.34              3.9%        IDS Financial
                                                                                                       (29%) - 7/01;
                                                                                                       Ohio Casualty
                                                                                                       (46%) - 7/01;
                                                                                                       Meridian Mortgage
                                                                                                       (12%) - 6/99
 6575 Snowdrift Road.........................          7.15(8)          10.50(8)          46.9%        Corning Packaging
                                                                                                       (100%) - 2/99
LANSDALE, PA
 1510 Gehman Road............................          4.72(8)           5.95(8)          26.1%        Ford Electronics
                                                                                                       (35%) - 6/98;
                                                                                                       Nibco (65%) - 8/99
BURLINGTON COUNTY, NJ
 One Greentree Centre........................         16.07             19.30             20.0%        American Executive
                                                                                                       Centers (30%) - 1/06;
                                                                                                       West Jersey (15%) - 4/01;
                                                                                                       Temple Sports Med.
                                                                                                       (18%) - 12/97
 Two Greentree Centre........................         16.02             19.30             20.5%        Merrill Lynch
                                                                                                       (23%) - 11/05;
                                                                                                       ReMax Suburban
                                                                                                       (12%) - 11/05
 Three Greentree Centre......................         16.41             19.30             17.6%        Parker, McCay & Criscuolo
                                                                                                       (39%) - 5/01;
                                                                                                       Marshall Dennehey
                                                                                                       (20%) - 5/97;
                                                                                                       Olde Discounts
                                                                                                       (12%) - 3/00;
                                                                                                       Surety Title
                                                                                                       (13%) - 11/03
CAMDEN COUNTY, NJ
 457 Haddonfield Road (LibertyView)..........         18.63             21.81             17.1%        HIP Health Plan
                                                                                                       (31%) - 12/07
OTHER MARKETS
 168 Franklin Corner Road....................         15.55             18.00(9)          15.8%        Dr. Belden (12%) - 5/01;
   Lawrenceville, NJ                                                                                   Crawford & Co.
                                                                                                       (14%) - 11/99
 Twin Forks Office Park
   Raleigh, NC
 5910-6090 Six Forks.........................         14.25             15.50(9)           8.8%        N/A
                                                      -----             -----            -----
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR THE
 INITIAL PROPERTIES..........................        $14.63(10)        $16.83(10)(11)      15.0%
                                                      =====             =====            =====
</TABLE>
 
                                       65
<PAGE>   4
<TABLE>
<CAPTION>
                                                                                                          AVERAGE TOTAL BASE
                                                                                     TOTAL BASE RENT       RENT PLUS EXPENSE
                                                                                         FOR THE            RECOVERIES PER
                                                           NET      PERCENTAGE        TWELVE MONTHS       NET RENTABLE SQUARE
                                                        RENTABLE   LEASED AS OF           ENDED               FOOT LEASED
ACQUISITION PROPERTIES:                         YEAR     SQUARE    SEPTEMBER 30,  SEPTEMBER 30, 1996(2)      SEPTEMBER 30,
              SUBMARKET/PROPERTY                BUILT     FEET        1996(1)            (000'S)                1996(3)
- ----------------------------------------------- -----   ---------  -------------  ---------------------   -------------------
<S>                                             <C>     <C>        <C>            <C>                     <C>
HORSHAM/WILLOW GROVE/JENKINTOWN, PA
 700 Business Center Drive(12).................  1986      
                                                           82,009       100.0%           $   793                 $11.59
 800 Business Center Drive(12).................  1986   
KING OF PRUSSIA, PA
 500 North Gulph Road..........................  1979      92,851        86.1%             1,387                  15.02
BUCKS COUNTY, PA
 2200 Cabot Boulevard..........................  1979      55,081       100.0%               259                   5.75
 2250 Cabot Boulevard..........................  1982      40,000       100.0%               170                   5.22
 2260 Cabot Boulevard(12)......................  1984
                                                           29,638       100.0%               246                  10.17
 2270 Cabot Boulevard(12)......................  1984
 3000 Cabot Boulevard..........................  1986      34,640        83.9%               364                  12.85
 3329 Street Road -- Greenwood Sq.(12).........  1985
 3331 Street Road -- Greenwood Sq.(12).........  1986     165,929        92.1%             2,234                  14.56
 3333 Street Road -- Greenwood Sq.(12).........  1988
BURLINGTON COUNTY, NJ
 8000 Lincoln Drive............................  1983      54,923       100.0%               445                   8.25
NORTHERN SUBURBAN WILMINGTON
 One Righter Parkway...........................  1989     104,828       100.0%             2,044                  19.50
                                                        ---------       -----            -------                 ------
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR THE
 ACQUISITION PROPERTIES........................           659,899        95.2%           $ 7,942                $ 12.93
                                                        =========       =====            =======                 ======
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR ALL
 PROPERTIES....................................         1,993,692        94.3%           $20,790                $ 13.67
                                                        =========       =====            =======                 ======
 
<CAPTION>
                                                     AVERAGE           C&W          RENTAL RATE        TENANTS LEASING 10% OR
                                                   ANNUALIZED        WEIGHTED         INCREASE            MORE OF RENTABLE
                                                     RENTAL          AVERAGE         POTENTIAL           SQUARE FOOTAGE PER
                                                   RATE AS OF        CLASS A        UNTIL MARKET           PROPERTY AS OF
ACQUISITION PROPERTIES:                           SEPTEMBER 30,       RENTAL          RATE IS            SEPTEMBER 30, 1996
              SUBMARKET/PROPERTY                     1996(4)         RATES(5)       ACHIEVED(6)       AND LEASE EXPIRATION DATE
- -----------------------------------------------  ---------------     --------       ------------      -------------------------
<S>                                              <C>                 <C>            <C>               <C>
HORSHAM/WILLOW GROVE/JENKINTOWN, PA
 700 Business Center Drive(12).................                                                       Metpath (35%) - 1/12;
                                                                                                      Sprint (19%) - 3/01;
                                                                                                      Macro (19%) - 4/01%;
 800 Business Center Drive(12).................                                                       Advanta (10%) - 6/99
KING OF PRUSSIA, PA
 500 North Gulph Road..........................        16.51           21.39             29.6%        Transition Software
                                                                                                      (16%) -  8/00, Strohl
                                                                                                      Syst (12%) -  10/99
BUCKS COUNTY, PA
 2200 Cabot Boulevard..........................         4.40            4.50              2.3%        Hussman Corp (38%), Nobel
                                                                                                      Printing (38%) - 6/97;
                                                                                                      McCaffrey Mgt
                                                                                                      (24%) - 8/00
 2250 Cabot Boulevard..........................         3.50            4.50             28.6%        Bucks County Nut (100%) -
                                                                                                      7/99
 2260 Cabot Boulevard(12)......................                                                       Sager Electrical (14%) -
                                                        8.78            9.00              2.5%        10/98; Terminix Intrntnl
 2270 Cabot Boulevard(12)......................                                                       (13%) - 11/96
 3000 Cabot Boulevard..........................        17.03           18.95             11.3%        Geraghty & Miller (31%) -
                                                                                                      11/97; Prudential Insur.
                                                                                                      (21%) - 7/98;
                                                                                                      Luigi Bormioli Co.
                                                                                                      (11%) -  6/98
 3329 Street Road -- Greenwood Sq.(12).........
 3331 Street Road -- Greenwood Sq.(12).........        16.54           18.95             14.6%        Waste Management (27%) -
 3333 Street Road -- Greenwood Sq.(12).........                                                       3/97
BURLINGTON COUNTY, NJ
 8000 Lincoln Drive............................        17.13           19.30           $ 12.7%        CSC (67%) - 11/01; Blue
                                                                                                      Cross (33%) - 2/07
NORTHERN SUBURBAN WILMINGTON
 One Righter Parkway...........................      $ 19.30           20.50              6.2%        Kimberly Clark (89%) -
                                                                                                       12/05
                                                       -----           -----            -----
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR THE
 ACQUISITION PROPERTIES........................      $ 16.23(13)      $19.01(11)(13)     17.2%
                                                       =====           =====            =====
CONSOLIDATED TOTAL/WEIGHTED AVERAGE FOR ALL
 PROPERTIES....................................      $ 15.15(14)      $17.54(11)(14)     15.8%
                                                       =====           =====            =====
</TABLE>
 
- ---------------
 
 (1) Calculated by dividing net rentable square feet included in leases dated on
     or before September 30, 1996 by the aggregate net rentable square feet
     included in the Property.
 
 (2) "Total Base Rent" for the twelve months ended September 30, 1996 represents
     base rents received during such period, excluding tenant reimbursements,
     calculated in accordance with generally accepted accounting principles
     determined on a straight-line basis. Tenant reimbursements generally
     include payment of real estate taxes, operating expenses, and escalations
     and common area maintenance and utility charges.
 
 (3) Represents the Total Base Rent for the twelve months ended September 30,
     1996, plus tenant reimbursements for the twelve months ended September 30,
     1996, divided by the net rentable square feet leased.
 
 (4) "Average Annualized Rental Rate" is calculated as follows: (i) for office
     leases written on a triple net basis, the sum of the annualized contracted
     base rental rates payable for all space leased as of September 30, 1996
     (without giving effect to free rent or scheduled rent increases that would
     be taken into account under generally accepted accounting principles) plus
     the 1996 budgeted operating expenses excluding tenant electricity; and (ii)
     for office leases written on a full service basis, the annualized
     contracted base rate payable for all space leased as of September 30, 1996.
     In both cases, the annualized rental rate is divided by the total square
     footage leased as of September 30, 1996 without giving effect to free rent
     or scheduled rent increases that would be taken into account under
     generally accepted accounting principles.
 
 (5) Represents the weighted average asking rates, as of June 30, 1996, of
     directly competitive properties in the relevant submarket within the
     Market, as identified by C&W.
 
 (6) Represents the percentage by which the June 30, 1996 C&W weighted average
     asking rate exceeds the September 30, 1996 average annualized rental rate
     of the applicable Property.
 
 (7) Property occupied by a single tenant under a triple net lease agreement,
     pursuant to which the tenant subcontracts directly with third party
     contractors for all building services.
 
 (8) These rates represent triple net lease rates (leases under which tenants
     are required to pay all real property taxes, insurance and expenses of
     maintaining the leased space).
 
 (9) Rental rates represent management's estimate of asking rental rates in
     these markets for comparable properties.
 
(10) Excludes 1510 Gehman Road, which is an industrial Property.
 
(11) Represents the Class A weighted average rental rate for the submarkets in
     which the Properties are located (weighted by Property net rentable square
     footage) as compared to the Class A office weighted average asking rate of
     $18.94 per square foot for the Market (weighted by Market net rentable
     square footage)as identified in the C&W Mid-Year Report.
 
(12) The data reflected for these properties are presented on a consolidated
     basis.
 
(13) Excludes 2200 Cabot Boulevard and 2250 Cabot Boulevard, which are
     industrial properties.
 
(14) Excludes 1510 Gehman Road, 2200 Cabot Boulevard and 2250 Cabot Boulevard,
     which are industrial properties.


                                       66
<PAGE>   5
 
TENANTS
 
     Initial Properties.  The Initial Properties are leased to approximately 146
tenants that are engaged in a variety of businesses. The following table sets
forth information regarding the Company's leases with its 20 largest tenants
based upon annualized base rent for the Initial Properties as of September 30,
1996:
 
<TABLE>
<CAPTION>
                                                                                                             PERCENTAGE OF
                                      REMAINING      AGGREGATE NET      PERCENTAGE OF       ANNUALIZED         AGGREGATE
                        NUMBER OF    LEASE TERM     RENTABLE SQUARE   AGGREGATE LEASED       BASE RENT        ANNUALIZED
     TENANT NAME         LEASES       IN MONTHS       FEET LEASED        SQUARE FEET          (000'S)          BASE RENT
- ----------------------  ---------   -------------   ---------------   -----------------   ---------------   ---------------
<S>                     <C>         <C>             <C>               <C>                 <C>               <C>
Reed Technology.......       1            178            79,204               5.9%            $   733              5.1%
Conti Mortgage........       1             56            53,906               4.0%                596              4.2%
IMS...................       1            115            40,774               3.1%                494              3.5%
HIP Health Plan of
  NJ..................       1            136            37,515               2.8%                463              3.2%
Clair O'Dell Agency...       1             59            25,177               1.9%                441              3.1%
CoreStates............       1            116            30,359               2.2%                410              2.9%
Nibco, Inc............       1             36            98,725               7.4%                395              2.8%
Parker, McKay &
  Criscuolo...........       1             57            25,905               1.9%                388              2.7%
GMAC..................       1             81            30,138               2.3%                354              2.5%
Neutronics............       1             77            47,604               3.6%                346              2.4%
Corning Packaging.....       1             30            46,250               3.5%                331              2.3%
Ford Motor Co.........       1             22            53,900               4.0%                327              2.3%
Marshall, Dennehey....       2             (a)           19,633               1.5%                321              2.2%
New England Mutual....       1            117            31,907               2.4%                320              2.2%
AT&T Communications...       3             (b)           32,774               2.5%                288              2.0%
Information
  Resources...........       1             52            21,008               1.6%                284              2.0%
American Executive
  Centers.............       1            114            16,853               1.3%                279              2.0%
Devco Mutual..........       1             54            13,332               1.0%                230              1.6%
Ohio Casualty.........       1             59            19,877               1.5%                229              1.6%
Franciscan Health
  Systems.............       1             34            23,588               1.8%                225              1.6%
                            --
                                         ----           -------              ----               -----             ----
        Consolidated
          Total/
          Weighted
          Average.....      23             75           748,429              56.1%            $ 7,454             52.3%
                            ==           ====           =======              ====               =====             ====
</TABLE>
 
- ---------------
(a) Consists of two leases: a lease representing 12,971 square feet that expires
    in May 1997 and a lease representing 6,662 square feet that expires in
    October 2001.
(b) Consists of three leases: a lease representing 11,000 square feet that
    expires in August 1998; a lease representing 13,107 square feet that expires
    in December 1996 and a lease representing 8,667 square feet that expires in
    November 1997.
 
                                       67
<PAGE>   6
 
     Acquisition Properties.  The Acquisition Properties are leased to
approximately 76 tenants that are engaged in a variety of businesses. The
following table sets forth information regarding leases with the 20 largest
tenants at the Acquisition Properties based upon annualized base rent for the
Acquisition Properties as of September 30, 1996:
 
<TABLE>
<CAPTION>
                                                                                                             PERCENTAGE OF
                                      REMAINING      AGGREGATE NET      PERCENTAGE OF       ANNUALIZED         AGGREGATE
                        NUMBER OF    LEASE TERM     RENTABLE SQUARE   AGGREGATE LEASED       BASE RENT        ANNUALIZED
     TENANT NAME         LEASES       IN MONTHS       FEET LEASED        SQUARE FEET          (000'S)          BASE RENT
- ----------------------  ---------   -------------   ---------------   -----------------   ---------------   ---------------
<S>                     <C>         <C>             <C>               <C>                 <C>               <C>
Kimberly Clark........       1            112            93,014              14.1%            $ 1,814             20.1%
Waste Management......       1              6            45,764               6.9%                715              8.0%
CSC...................       1             63            36,830               5.6%                626              6.9%
Blue Cross............       1            126            18,093               2.7%                315              3.5%
FPA Corporation.......       1              6            16,453               2.5%                280              3.1%
Prudential............       2             (a)           13,945               2.1%                271              3.0%
Sprint................       1             55            15,348               2.3%                253              2.8%
Metpath...............       1            185            28,475               4.3%                249              2.8%
Macro.................       1             56            15,425               2.3%                231              2.6%
Transition Software...       1             48            15,101               2.3%                227              2.5%
KWS&P.................       1             31            22,706               3.4%                212              2.4%
Nason Cullen Inc......       1             59            12,566               1.9%                201              2.2%
Strohl Systems........       1             38            11,277               1.7%                186              2.1%
Nextel
  Communication.......       1             56            11,004               1.7%                182              2.0%
Geraghty & Miller.....       1             15            10,840               1.6%                173              1.9%
Outdoor World Corp....       1             20             9,579               1.5%                153              1.7%
Bucks County Nut......       1             35            40,000               6.1%                140              1.6%
Advanta...............       1             34             8,339               1.3%                129              1.4%
Orbital Engineer......       1             53             7,468               1.1%                117              1.3%
First American........       1             39             6,258               0.9%                114              1.3%
                            --
                                         ----           -------              ----               -----             ----
        Consolidated
        Total/Weighted
          Average.....      21             65           438,435              65.5%            $ 6,588             72.2%
                            ==           ====           =======              ====               =====             ====
</TABLE>
 
- ---------------
 
(a) Consists of two leases: a lease representing 7,445 square feet that expires
    in July 1998, and a lease representing 6,500 square feet that expires in
    November 1996.
 
                                       68
<PAGE>   7
 
     Properties.  On a combined basis, the Properties are leased to 222 tenants
that are engaged in a variety of businesses. The following table sets forth
information, on a combined basis, regarding leases at the Properties with the 20
largest tenants based upon annualized base rent from the Properties as of
September 30, 1996:
 
<TABLE>
<CAPTION>
                                                                                                             PERCENTAGE OF
                                      REMAINING      AGGREGATE NET      PERCENTAGE OF       ANNUALIZED         AGGREGATE
                        NUMBER OF    LEASE TERM     RENTABLE SQUARE   AGGREGATE LEASED       BASE RENT        ANNUALIZED
     TENANT NAME         LEASES       IN MONTHS       FEET LEASED        SQUARE FEET         $ (000'S)         BASE RENT
- ----------------------  ---------   -------------   ---------------   -----------------   ---------------   ---------------
<S>                     <C>         <C>             <C>               <C>                 <C>               <C>
Kimberly Clark........       2             (a)           99,238               5.0%            $ 2,013              8.7%
Waste Management......       1              6            45,764               2.3%                752              3.2%
Reed Technology.......       1            178            79,204               4.0%                733              3.1%
CSC...................       1             63            36,830               1.9%                626              2.7%
Conti Mortgage........       1             56            53,906               2.7%                596              2.6%
IMS...................       1            115            40,774               2.0%                495              2.1%
HIP Health Plan NJ....       1            136            37,515               1.9%                463              2.0%
Clair O'Dell Agency...       1             59            25,177               1.3%                441              1.9%
CoreStates............       1            116            30,359               1.5%                410              1.8%
Nibco, Inc............       1             36            98,725               5.0%                395              1.7%
Parker, McKay &
  Criscuolo...........       1             57            25,905               1.3%                389              1.7%
GMAC..................       1             81            30,138               1.5%                355              1.5%
Neutronics............       1             77            47,604               2.4%                346              1.5%
Corning Packaging.....       1             30            46,250               2.3%                331              1.4%
Ford Electronics......       1             22            53,900               2.7%                327              1.4%
Marshall, Dennehey....       2             (b)           19,633               1.0%                321              1.4%
New England Mutual....       1            117            31,907               1.6%                320              1.4%
Blue Cross............       1            126            18,093               0.9%                315              1.4%
AT&T
  Communications......       3             (c)           32,774               1.6%                288              1.2%
Information
  Resources...........       1             52            21,008               1.1%                284              1.2%
                            --
                                         ----           -------              ----          ----------             ----
        Consolidated
          Total
          Weighted
          Average.....      24             76           874,704              43.9%            $10,200             43.8%
                            ==                          =======              ====          ==========             ====
</TABLE>
 
- ---------------
(a) Consists of two leases: a lease representing 93,014 square feet that expires
    in December 2005, and a lease representing 6,224 square feet that expires in
    November 1997.
 
(b) Consists of two leases: a lease representing 12,971 square feet that expires
    in May 1997 and a lease representing 6,662 square feet that expires in
    October 2001.
 
(c) Consists of three leases: a lease representing 11,000 square feet that
    expires in August 1998; a lease representing 13,107 square feet that expires
    in December 1996 and a lease representing 8,667 square feet that expires in
    November 1997.
 
                                       69
<PAGE>   8
 
LEASE EXPIRATIONS
 
     Initial Properties.  The following table sets forth detailed lease
expiration information for the Initial Properties for leases in place as of
September 30, 1996, assuming that none of the tenants exercise renewal options
or termination rights, if any, at or prior to the scheduled expirations:
 
<TABLE>
<CAPTION>
                                                                                                      PERCENTAGE
                                                                                                          OF
                                                                                                        TOTAL
                                                   RENTABLE                                             FINAL
                                     NUMBER OF      SQUARE                        FINAL ANNUALIZED    ANNUALIZED
                                       LEASES      FOOTAGE          FINAL          BASE RENT PER         BASE
                                      EXPIRING    SUBJECT TO     ANNUALIZED         SQUARE FOOT       RENT UNDER
     YEAR OF LEASE EXPIRATION        WITHIN THE    EXPIRING    BASE RENT UNDER         UNDER           EXPIRING    CUMULATIVE
           DECEMBER 31                YEAR(1)       LEASES     EXPIRING LEASES   EXPIRING LEASES(1)     LEASES       TOTAL
- -----------------------------------  ----------   ----------   ---------------   ------------------   ----------   ----------
<S>                                  <C>          <C>          <C>               <C>                  <C>          <C>
1996(2)............................       15         54,004      $   676,134           $12.52              4.4%         4.4%
1997...............................       42        115,886        1,701,924            14.69             11.1%        15.5%
1998...............................       20        100,621(3)       977,905(3)          9.72              6.4%        21.9%
1999...............................       28        296,212(3)     2,495,062(3)          8.42             16.3%        38.2%
2000...............................       10         62,670          874,483            13.95              5.7%        45.5%
2001...............................       20        212,726        2,970,875            13.97             19.4%        63.3%
2002...............................        1          8,912          169,328            19.00              1.1%        64.4%
2003...............................        7        109,336        1,361,239            12.45              8.9%        73.3%
2004...............................        1          9,262          185,240            20.00              1.2%        74.5%
2005...............................        2         19,387          365,564            18.86              2.4%        76.9%
2006...............................        6        145,449        1,942,732            13.36             12.7%        89.6%
2007 and thereafter................        2        116,719        1,580,118            13.54             10.4%       100.0%
                                         ---      ---------      -----------           ------           ------         ----
Consolidated Total/Weighted
  Average..........................      154      1,251,184      $15,300,604           $12.23            100.0%       100.0%
                                         ===      =========      ===========           ======           ======         ====
</TABLE>
 
- ---------------
(1) "Final Annualized Base Rent" for each lease scheduled to expire represents
    the cash rental rate of base rents, excluding tenant reimbursements, in the
    final month prior to expiration multiplied by 12. Tenant reimbursements
    generally include payments on account of real estate taxes, operating
    expense escalations and common area utility charges.
 
(2) Represents lease expirations from September 30, 1996 through December 31,
    1996.
 
(3) Includes 152,625 net rentable square feet and $780,711 of final annualized
    base rent ($5.12 per net rentable square foot) associated with 1998 and 1999
    lease expirations on the Company's sole industrial property included in the
    Initial Properties.
 
                                       70
<PAGE>   9
 
     Acquisition Properties.  The following table sets forth detailed lease
expiration information for the Acquisition Properties for leases in place as of
September 30, 1996, assuming none of the tenants exercise renewal options or
termination rights, if any, at or prior to the scheduled expirations:
 
<TABLE>
<CAPTION>
                                                                                                      PERCENTAGE
                                                                                                          OF
                                                                                                        TOTAL
                                                   RENTABLE                                             FINAL
                                     NUMBER OF      SQUARE                        FINAL ANNUALIZED    ANNUALIZED
                                       LEASES      FOOTAGE          FINAL          BASE RENT PER         BASE
                                      EXPIRING    SUBJECT TO     ANNUALIZED         SQUARE FOOT       RENT UNDER
     YEAR OF LEASE EXPIRATION        WITHIN THE    EXPIRING    BASE RENT UNDER         UNDER           EXPIRING    CUMULATIVE
            DECEMBER 31               YEAR(1)       LEASES     EXPIRING LEASES   EXPIRING LEASES(1)     LEASES       TOTAL
- -----------------------------------  ----------   ----------   ---------------   ------------------   ----------   ----------
<S>                                  <C>          <C>          <C>               <C>                  <C>          <C>
1996(2)............................       7          23,245      $   334,950           $14.41              3.4%         3.4%
1997...............................      18         130,449        1,866,640            14.31             19.0%        22.4%
1998...............................      14          42,303          659,835            15.60              6.7%        29.1%
1999...............................      20         143,085        1,605,792            11.22             16.3%        45.4%
2000...............................       4          35,008          445,238            12.72              4.5%        49.9%
2001...............................      10         108,623        1,849,219            17.02             18.8%        68.7%
2002...............................       1           4,433           82,764            18.67              0.8%        69.5%
2003...............................      --              --               --               --               --         69.5%
2004...............................      --              --               --               --               --         69.5%
2005...............................       1          93,014        2,252,799            24.22             22.9%        92.4%
2006...............................      --              --               --               --               --         92.4%
2007 and thereafter................       3          48.069          742,447            15.45              7.6%       100.0%
                                        ---       -------- -     -----------           ------           ------
Consolidated Total/Weighted
  Average..........................      78         628,229      $ 9,839,684           $15.66            100.0%       100.0%
                                        ===       =========      ===========           ======           ======
</TABLE>
 
- ---------------
(1) "Final Annualized Base Rent" for each lease scheduled to expire represents
    the cash rental rate of base rents, excluding tenant reimbursements, in the
    final month prior to expiration multiplied by 12. Tenant reimbursements
    generally include payments on account of real estate taxes, operating
    expense escalations and common area utility charges.
 
(2) Represents lease expirations from September 30, 1996 through December 31,
    1996.
 
                                       71
<PAGE>   10
 
     Properties.  The following table sets forth detailed lease expiration
information for the Properties on a combined basis for leases in place as of
September 30, 1996, assuming that none of the tenants exercise renewal options
or termination rights, if any, at or prior to the scheduled expirations:
 
<TABLE>
<CAPTION>
                                                                                                      PERCENTAGE
                                                                                                          OF
                                                                                                        TOTAL
                                                   RENTABLE                                             FINAL
                                     NUMBER OF      SQUARE                        FINAL ANNUALIZED    ANNUALIZED
                                       LEASES      FOOTAGE          FINAL          BASE RENT PER         BASE
                                      EXPIRING    SUBJECT TO     ANNUALIZED         SQUARE FOOT       RENT UNDER
     YEAR OF LEASE EXPIRATION        WITHIN THE    EXPIRING    BASE RENT UNDER         UNDER           EXPIRING    CUMULATIVE
           DECEMBER 31                YEAR(1)       LEASES     EXPIRING LEASES   EXPIRING LEASES(1)     LEASES       TOTAL
- -----------------------------------  ----------   ----------   ---------------   ------------------   ----------   ----------
<S>                                  <C>          <C>          <C>               <C>                  <C>          <C>
1996(2)............................       22         77,249      $ 1,011,084           $13.09              4.0%         4.0%
1997...............................       60        246,335        3,568,563            14.49             14.2%        18.2%
1998...............................       34        142,924(3)     1,637,739(3)         11.46              6.5%        24.7%
1999...............................       48        439,297(3)     4,100,854(3)          9.34             16.3%        41.0%
2000...............................       14         97,678        1,319,720            13.51              5.3%        46.3%
2001...............................       30        321,349        4,820,094            15.00             19.2%        65.5%
2002...............................        2         13,345          252,092            18.89              1.0%        66.5%
2003...............................        7        109,336        1,361,239            12.45              5.4%        71.9%
2004...............................        1          9,262          185,240            20.00              0.7%        72.6%
2005...............................        3        112,401        2,618,363            23.29             10.4%        83.0%
2006...............................        6        145,449        1,942,732            13.36              7.7%        90.7%
2007 and thereafter................        5        164,788        2,322,565             9.24              9.3%       100.0%
                                         ---      ---------      -----------           ------           ------
Consolidated Total/
  Weighted Average.................      232      1,879,413      $25,140,285           $13.38            100.0%       100.0%
                                         ===      =========      ===========           ======           ======
</TABLE>
 
- ---------------
(1) "Final Annualized Base Rent" for each lease scheduled to expire represents
    the cash rental rate of base rents, excluding tenant reimbursements, in the
    final month prior to expiration multiplied by 12. Tenant reimbursements
    generally include payments on account of real estate taxes, operating
    expense escalations and common area utility charges.
 
(2) Represents lease expirations from September 30, 1996 through December 31,
    1996.
 
(3) Includes 152,625 net rentable square feet and $780,711 of final annualized
    base rent ($5.12 per net rentable square foot) associated with 1998 and 1999
    lease expirations on the Company's sole industrial property included in the
    Initial Properties.
 
                                       72
<PAGE>   11
 
                  LEASING EXPIRATIONS -- PROPERTY BY PROPERTY
 
     The following table sets forth detailed lease expiration information for
each of the Properties for leases in place as of September 30, 1996, assuming
that none of the tenants exercise renewal options or termination rights, if any,
at or prior to the scheduled expirations.
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES:
HORSHAM/WILLOW GROVE/
 JENKINTOWN, PA
650 Dresher Road
Square Footage of Expiring Leases.....      --             --          --            --            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --            --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --            --            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --            --            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --            --            --          --
Number of Leases Expiring.............      --             --          --            --            --            --          --
1155 Business Center Drive
Square Footage of Expiring Leases.....      --             --       1,023         6,988         2,298            --          --
Percentage of Total Leased Square
 Feet.................................      --             --         2.0%         13.7%          4.5%           --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --     $11,253       $97,622       $29,070            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --      $11.00        $13.97            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --         1.7%         14.4%          4.3%           --          --
Number of Leases Expiring.............      --             --           1             1             1            --          --
500 Enterprise Road
Square Footage of Expiring Leases.....      --             --          --            --        12,845        53,906          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --          19.2%         80.8%         --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --            --      $122,028      $595,661          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --            --         $9.50        $11.05          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --          17.0%         83.0%         --
Number of Leases Expiring.............      --             --          --            --             1             1          --
One Progress Avenue
Square Footage of Expiring Leases.....      --             --          --            --            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --            --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --            --            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --            --            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --            --            --          --
Number of Leases Expiring.............      --             --          --            --            --            --          --
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES:
HORSHAM/WILLOW GROVE/
 JENKINTOWN, PA
650 Dresher Road
Square Footage of Expiring Leases.....      30,138          --          --            --           --          30,138
Percentage of Total Leased Square
 Feet.................................       100.0%         --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................    $403,849          --          --            --           --        $403,849
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      $13.40          --          --            --           --          $13.40
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................       100.0%         --          --            --           --           100.0%
Number of Leases Expiring.............           1          --          --            --           --               1
1155 Business Center Drive
Square Footage of Expiring Leases.....          --          --          --        40,774           --          51,083
Percentage of Total Leased Square
 Feet.................................          --          --          --          79.8%          --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --      $538,217           --        $676,162
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --        $13.20           --          $13.24
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --          79.6%          --           100.0%
Number of Leases Expiring.............          --          --          --             1           --               4
500 Enterprise Road
Square Footage of Expiring Leases.....          --          --          --            --           --          66,751
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $717,689
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $10.75
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               2
One Progress Avenue
Square Footage of Expiring Leases.....          --          --          --            --       79,204          79,204
Percentage of Total Leased Square
 Feet.................................          --          --          --            --        100.0 %         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --     $967,873        $967,873
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --       $12.22          $12.22
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --        100.0 %         100.0%
Number of Leases Expiring.............          --          --          --            --            1               1
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       73
<PAGE>   12
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
SOUTHERN ROUTE
202 CORRIDOR, PA
456 Creamery Way
Square Footage of Expiring Leases.....      --             --          --            --            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --            --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --            --            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --            --            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --            --            --          --
Number of Leases Expiring.............      --             --          --            --            --            --          --
486 Thomas Jones Way
Square Footage of Expiring Leases.....   2,676          3,895       8,612        10,086           961            --          --
Percentage of Total Leased Square
 Feet.................................    10.2 %         14.9%       32.8%         38.5%          3.7%
Final Annual Base Rent Under
 Expiring Leases(2)................... $30,774        $46,935     $99,944      $113,468       $11,532            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............  $11.50         $12.05      $11.61        $11.25        $12.00            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................       0              0        33.0%         37.5%          3.8%
Number of Leases Expiring.............       1              1           3             1             1            --          --
468 Creamery Way
Square Footage of Expiring Leases.....      --             --          --        23,588         5,346            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --          81.5%         18.5%           --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --      $224,086       $67,627            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --         $9.50        $12.65            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --          76.8%         23.2%           --          --
Number of Leases Expiring.............      --             --          --             1             1            --          --
110 Summit Drive
Square Footage of Expiring Leases.....   2,600             --          --        26,920            --            --          --
Percentage of Total Leased Square
 Feet.................................     8.8 %                                   91.2%
Final Annual Base Rent Under
 Expiring Leases(2)................... $22,646             --          --      $191,110            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............   $8.71             --          --         $7.10            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................    10.6 %                                   89.4%
Number of Leases Expiring.............       1             --          --             2            --            --          --
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
SOUTHERN ROUTE
202 CORRIDOR, PA
456 Creamery Way
Square Footage of Expiring Leases.....      47,604          --          --            --           --          47,604
Percentage of Total Leased Square
 Feet.................................       100.0%         --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................    $357,030          --          --            --           --        $357,030
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............       $7.50          --          --            --           --           $7.50
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................       100.0%         --          --            --           --           100.0%
Number of Leases Expiring.............           1          --          --            --           --               1
486 Thomas Jones Way
Square Footage of Expiring Leases.....          --          --          --            --           --          26,230
Percentage of Total Leased Square
 Feet.................................                                                                         100.00%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $302,653
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $11.54
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................                                                                         100.00%
Number of Leases Expiring.............          --          --          --            --           --               7
468 Creamery Way
Square Footage of Expiring Leases.....          --          --          --            --           --          28,934
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $291,713
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $10.08
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               2
110 Summit Drive
Square Footage of Expiring Leases.....          --          --          --            --           --          29,520
Percentage of Total Leased Square
 Feet.................................                                                                         100.00%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $213,756
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --           $7.24
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................                                                                         100.00%
Number of Leases Expiring.............          --          --          --            --           --               3
</TABLE>
 
- ---------------
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                                       74
<PAGE>   13
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
BLUE BELL/PLYMOUTH MEETING/ FORT WASHINGTON, PA
2240/50 Butler Pike
Square Footage of Expiring Leases.....      --             --       4,430        17,080            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --         8.5%         33.0%           --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --     $56,483      $187,880            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --      $12.75        $11.00            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --         8.1%         27.0%           --            --          --
Number of Leases Expiring.............      --             --           1             1            --            --          --
120 West Germantown Pike
Square Footage of Expiring Leases.....      --             --       1,450            --            --        29,096          --
Percentage of Total Leased Square
 Feet.................................                                4.8%                                     95.2%
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --     $17,400            --            --      $510,427          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --      $12.00            --            --        $17.54          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --                        3.3%                                     96.7%
Number of Leases Expiring.............      --             --           1            --            --             2          --
140 West Germantown Pike
Square Footage of Expiring Leases.....      --             --       7,460        16,900         1,264            --          --
Percentage of Total Leased Square
 Feet.................................      --             --        29.1%         66.0%          4.9%           --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --    $125,701      $215,059       $16,432            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --      $16.85        $12.73        $13.00            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --        35.2%         60.2%          4.6%           --          --
Number of Leases Expiring.............      --             --           1             2             1            --          --
2260 Butler Pike
Square Footage of Expiring Leases.....      --             --          --         3,041        21,008         7,843          --
Percentage of Total Leased Square
 Feet.................................                                              9.5%         65.9%         24.6%
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --       $41,662      $283,608       $98,038          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --        $13.70        $13.50        $12.50          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --           9.8%         67.0%         23.2%         --
Number of Leases Expiring.............      --             --          --             1             1             1          --
 
<CAPTION>
                                                                                            2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
 
BLUE BELL/PLYMOUTH MEETING/ FORT WASHI
2240/50 Butler Pike
Square Footage of Expiring Leases.....          --          --          --        30,359           --          51,869
Percentage of Total Leased Square
 Feet.................................          --          --          --          58.5%          --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --      $450,831           --        $695,194
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --        $14.85           --          $13.40
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --          64.9%          --           100.0%
Number of Leases Expiring.............          --          --          --             1           --               3
120 West Germantown Pike
Square Footage of Expiring Leases.....          --          --          --            --           --          30,546
Percentage of Total Leased Square
 Feet.................................                                                                          100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $527,827
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $17.28
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................                                                                          100.0%
Number of Leases Expiring.............          --          --          --            --           --               3
140 West Germantown Pike
Square Footage of Expiring Leases.....          --          --          --            --           --          25,624
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $357,192
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $13.94
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               4
2260 Butler Pike
Square Footage of Expiring Leases.....          --          --          --            --           --          31,892
Percentage of Total Leased Square
 Feet.................................                                                                          100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $423,308
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --          $13.27
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               3
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       75
<PAGE>   14
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
MAIN LINE, PA
16 Campus Boulevard
Square Footage of Expiring Leases.....      --             --          --            --            --         8,000          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --            --          12.2%         --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --            --            --       $96,000          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --            --            --        $12.00          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --            --          13.4%         --
Number of Leases Expiring.............      --             --          --            --            --             1          --
18 Campus Boulevard
Square Footage of Expiring Leases.....      --          6,224          --         2,042            --        29,434          --
Percentage of Total Leased Square
 Feet.................................      --           16.5%         --           5.4%           --          78.1%         --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --        $78,360          --       $26,546            --      $447,354          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --         $12.59          --        $13.00            --        $15.20          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --           14.2%         --           4.8%           --          81.0%         --
Number of Leases Expiring.............      --              1          --             1            --             3          --
LEHIGH VALLEY, PA
7310 Tilghman Street
Square Footage of Expiring Leases.....  13,107          8,667      11,000         3,829            --         2,980          --
Percentage of Total Leased Square
 Feet.................................    33.1 %         21.9%       27.8%          9.7%           --           7.5%         --
Final Annual Base Rent Under
 Expiring Leases(2)................... $108,788       $86,670     $92,950       $34,461            --       $29,055          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............   $8.30         $10.00       $8.45         $9.00            --         $9.75          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................    30.9 %         24.6%       26.4%          9.8%           --           8.3%         --
Number of Leases Expiring.............       1              1           1             1            --             1          --
7248 Tilghman Street
Square Footage of Expiring Leases.....      --          5,327          --         2,695            --        32,180          --
Percentage of Total Leased Square
 Feet.................................      --           13.2%         --           6.7%           --          80.1%         --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --        $59,929          --       $30,993            --      $348,540          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --         $11.25          --        $11.50            --        $10.83          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --           13.6%         --           7.1%           --          79.3%         --
Number of Leases Expiring.............      --              1          --             1            --             2          --
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                     <C>           <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
MAIN LINE, PA
16 Campus Boulevard
Square Footage of Expiring Leases.....          --          --          --        57,463           --        65,463
Percentage of Total Leased Square
 Feet.................................          --          --          --          87.8%          --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --      $620,837           --      $716,837
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --        $10.80           --        $10.95
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --          86.6%          --         100.0%
Number of Leases Expiring.............          --          --          --             3           --             4
18 Campus Boulevard
Square Footage of Expiring Leases.....          --          --          --            --           --        37,700
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --      $552,260
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --        $14.65
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --         100.0%
Number of Leases Expiring.............          --          --          --            --           --             5
LEHIGH VALLEY, PA
7310 Tilghman Street
Square Footage of Expiring Leases.....          --          --          --            --           --        39,583
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --      $351,924
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --         $8.89
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --         100.0%
Number of Leases Expiring.............          --          --          --            --           --             5
7248 Tilghman Street
Square Footage of Expiring Leases.....          --          --          --            --           --        40,202
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --      $439,462
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --        $10.93
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --         100.0%
Number of Leases Expiring.............          --          --          --            --           --             4
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       76
<PAGE>   15
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
6575 Snowdrift Road
Square Footage of Expiring Leases.....      --             --          --        46,250            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --         100.0%           --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --          --      $330,688            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --          --         $7.15            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --         100.0%           --            --          --
Number of Leases Expiring.............      --             --          --             1            --            --          --
LANSDALE, PA
1510 Gehman Road
Square Footage of Expiring Leases.....      --             --      53,900        98,725            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --        35.3%         64.7%           --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)...................      --             --    $361,130      $419,581            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      --             --       $6.70         $4.25            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --        46.3%         53.7%           --            --          --
Number of Leases Expiring.............      --             --           1             1            --            --          --
BURLINGTON COUNTY, NJ
One Greentree Centre
Square Footage of Expiring Leases.....   3,701         15,394       5,172         4,415            --        10,303          --
Percentage of Total Leased Square
 Feet.................................     6.6%          27.6%        9.3%          7.9%           --          18.5%         --
Final Annual Base Rent Under
 Expiring Leases(2)................... $60,813       $247,192     $84,954       $78,366            --      $182,038          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............  $16.43         $16.06      $16.43        $17.75            --        $17.67          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     6.2%          25.1%        8.6%          8.0%           --          18.5%         --
Number of Leases Expiring.............       2              6           3             1            --             2          --
Two Greentree Centre
Square Footage of Expiring Leases.....   5,680         18,838       3,732         3,183            --            --          --
Percentage of Total Leased Square
 Feet.................................    10.1%          33.6%        6.7%          5.7%           --            --          --
Final Annual Base Rent Under
 Expiring Leases(2)................... $99,400       $283,350     $69,917       $50,928            --            --          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............  $17.50         $15.04      $11.75        $16.00            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................    10.3%          29.2%        7.2%          5.3%           --            --          --
Number of Leases Expiring.............       1              5           2             1             1            --          --
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
6575 Snowdrift Road
Square Footage of Expiring Leases.....          --          --          --            --           --          46,250
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $330,688
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --           $7.15
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               1
LANSDALE, PA
1510 Gehman Road
Square Footage of Expiring Leases.....          --          --          --            --           --         152,625
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --            --           --        $780,711
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --            --           --           $5.12
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               2
BURLINGTON COUNTY, NJ
One Greentree Centre
Square Footage of Expiring Leases.....          --          --          --        16,853           --          55,838
Percentage of Total Leased Square
 Feet.................................          --          --          --          30.2%          --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................          --          --          --      $332,847           --        $986,210
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............          --          --          --        $19.75           --          $17.66
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --          33.8%          --           100.0%
Number of Leases Expiring.............          --          --          --             1           --              15
Two Greentree Centre
Square Footage of Expiring Leases.....       5,255          --      19,387            --           --          56,075
Percentage of Total Leased Square
 Feet.................................         9.4%         --        34.5%           --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................     $99,845          --    $365,564            --           --        $969,004
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............      $19.00          --      $18.86            --           --          $16.82
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................        10.3%         --        37.7%           --           --           100.0%
Number of Leases Expiring.............           1          --           2            --           --              12
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       77
<PAGE>   16
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
Three Greentree Centre
Square Footage of Expiring Leases.....       --        17,676          --            --        13,150        26,430          --
Percentage of Total Leased Square
 Feet.................................       --          26.6%         --            --          19.8%         39.8%         --
Final Annual Base Rent Under
 Expiring Leases(2)...................       --      $317,173          --            --      $242,155      $450,885          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............       --        $17.94          --            --        $18.41        $17.06          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................       --          26.9%         --            --          20.5%         38.2%         --
Number of Leases Expiring.............       --             3          --            --             2             2          --
CAMDEN COUNTY, NJ
457 Haddonfield Road
Square Footage of Expiring Leases.....                 11,521          --         7,233         5,798         6,978       8,912
Percentage of Total Leased Square
 Feet.................................                   11.4%         --           7.2%          5.6%          6.9%        8.8%
Final Annual Base Rent Under
 Expiring Leases(2)...................               $184,682          --      $105,819      $102,032      $144,134    $169,328
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............                 $16.03          --        $14.63        $17.60        $20.66      $19.00
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................                   10.4%         --           6.0%          5.8%          8.1%        9.6%
Number of Leases Expiring.............                      1          --             1             2             3           1
OTHER MARKETS
168 Franklin Corner Road,
 Lawrenceville, NJ
Square Footage of Expiring Leases.....    8,467           550          --         4,504            --         3,902          --
Percentage of Total Leased Square
 Feet.................................     48.6%          3.2%         --          25.8%           --          22.4%         --
Final Annual Base Rent Under
 Expiring Leases(2)................... $106,041        $7,150          --       $62,200            --       $39,020          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............   $12.52        $13.00          --        $13.81            --        $10.00          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     49.5%          3.3%         --          29.0%           --          18.2%         --
Number of Leases Expiring.............        3             1          --             1            --             1          --
5910-6090 Six Forks, Raleigh, NC
Square Footage of Expiring Leases.....   17,773        27,794       3,842        18,733            --         1,674          --
Percentage of Total Leased Square
 Feet.................................     24.2%         37.9%        5.2%         25.6%           --           2.3%         --
Final Annual Base Rent Under
 Expiring Leases(2)................... $247,672      $390,483     $58,175      $286,723            --       $26,784          --
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............    13.94         14.05       15.14         15.31            --         16.00          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     23.2%         36.5%        5.4%         26.8%           --           2.5%         --
Number of Leases Expiring.............        6            22           5            10            --             1          --
 
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                     <C>           <C>         <C>         <C>           <C>           <C>
INITIAL PROPERTIES (CONTINUED):
Three Greentree Centre
Square Footage of Expiring Leases.....    9,226             --          --            --           --        66,482
Percentage of Total Leased Square 
 Feet.................................     13.9%            --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)................... $170,681             --          --            --           --    $1,180,894
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............   $18.50             --          --            --           --        $17.76
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     14.5%            --          --            --           --         100.0%
Number of Leases Expiring.............        1             --          --            --           --             8
CAMDEN COUNTY, NJ
457 Haddonfield Road
Square Footage of Expiring Leases.....   13,589          9,262          --            --       37,515       100,808
Percentage of Total Leased Square
 Feet.................................     13.5%           9.2%         --            --         37.2%        100.0%
Final Annual Base Rent Under
 Expiring Leases(2)................... $269,926       $185,240          --            --     $612,245    $1,773,406
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............   $19.86          20.00          --            --       $16.32        $17.59
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     15.2%          10.5%         --            --         34.5%        100.0%
Number of Leases Expiring.............        2              1          --            --            1            12
OTHER MARKETS
168 Franklin Corner Road,
 Lawrenceville, NJ
Square Footage of Expiring Leases.....       --             --          --            --           --        17,423
Percentage of Total Leased Square
 Feet.................................       --             --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................       --             --          --            --           --      $214,411
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............       --             --          --            --           --        $12.31
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................       --             --          --            --           --         100.0%
Number of Leases Expiring.............       --             --          --            --           --             6
5910-6090 Six Forks, Raleigh, NC
Square Footage of Expiring Leases.....    3,524             --          --            --           --        73,340
Percentage of Total Leased Square
 Feet.................................      4.8%            --          --            --           --         100.0%
Final Annual Base Rent Under
 Expiring Leases(2)...................  $59,908             --          --            --           --    $1,069,745
Final Annual Base Rent per Square Foot
 Under Expiring Leases(3).............    17.00             --          --            --           --         14.59
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      5.6%            --          --            --           --         100.0%
Number of Leases Expiring.............        1             --          --            --           --            45
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       78
<PAGE>   17
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
CONSOLIDATED TOTALS FOR INITIAL
 PROPERTIES
 Square Footage of Expiring Leases....  54,004        115,886     100,621       296,212        62,670       212,726       8,912
 Percentage of Total Leased Square
   Feet...............................     4.6 %          9.2%        8.0%         23.6%          5.0%         17.0%         .7%
 Total Annual Base Rent Under Expiring
   Leases(2).......................... $676,134    $1,701,924    $977,905    $2,495,062      $874,483    $2,970,875    $169,328
 Total Annual Base Rent per Square
   Feet Under Expiring Leases(3)......  $12.86         $14.69       $9.72         $8.42        $13.95        $13.97      $19.00
 Percentage of Total Final Annual Base
   Rate Represented by Expiring
   Leases.............................     4.8 %         11.0%        6.4%         16.2%          5.7%         19.3%        1.1%
 Number of Leases Expiring............      15             42          20            28            10            20           1
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
CONSOLIDATED TOTALS FOR INITIAL
 PROPERTIES
 Square Footage of Expiring Leases....     109,336       9,262      19,387       145,449      116,719       1,251,184
 Percentage of Total Leased Square
   Feet...............................         8.7%        0.8%        1.5%         11.6%         9.3 %         100.0%
 Total Annual Base Rent Under Expiring
   Leases(2)..........................  $1,361,239    $185,240    $365,564    $1,942,732    $1,580,118    $15,300,604
 Total Annual Base Rent per Square
   Feet Under Expiring Leases(3)......      $12.45      $20.00      $18.86        $13.36       $13.54          $12.23
 Percentage of Total Final Annual Base
   Rate Represented by Expiring
   Leases.............................         8.9%        1.2%        2.4%         12.7%        10.3 %         100.0%
 Number of Leases Expiring............           7           1           2             6            2             154
</TABLE>
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
ACQUISITION PROPERTIES:
HORSHAM/WILLOW GROVE/JENKINTOWN PA
700/800 Business Center Drive
Square Footage of Expiring Leases.....      --             --          --        22,761            --        30,773          --
Percentage of Total Leased Square
 Feet.................................      --             --          --          27.8%           --          37.5%         --
Final Annual Base Rent Under Expiring
 Leases(2)............................      --             --          --      $348,223            --      $499,965          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............      --             --          --        $15.30            --        $16.25          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --          27.5%           --          39.5%         --
Number of Leases Expiring.............      --             --          --             3            --             2          --
KING OF PRUSSIA, PA
500 North Gulph Road
Square Footage of Expiring Leases.....   2,362          8,214       6,617        35,085        15,101        12,566          --
Percentage of Total Leased Square
 Feet.................................     3.0 %         10.3%        8.3%         43.9%         18.9%         15.7%         --
Final Annual Base Rent Under Expiring
 Leases(2)............................ $43,697       $133,067    $123,521      $608,010      $286,919      $226,188          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............  $18.50         $16.20      $18.67        $17.33        $19.00        $18.00          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     3.1 %          9.4%        8.7%         42.8%         20.2%         15.9%         --
Number of Leases Expiring.............       1              1           3             5             1             1          --
Bucks County, PA
2200 Cabot Boulevard
Square Footage of Expiring Leases.....      --         20,700          --        21,000        13,381            --          --
Percentage of Total Leased Square
 Feet.................................      --           37.6%         --          38.1%         24.3%           --          --
Final Annual Base Rent Under Expiring
 Leases(2)............................      --       $108,054          --       $80,850       $53,524            --          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............      --          $5.22          --         $3.85         $4.00            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --           44.6%         --          33.3%         22.1%           --          --
Number of Leases Expiring.............      --              1          --             1             1            --          --
2250 Cabot Boulevard
Square Footage of Expiring Leases.....      --             --          --        40,000            --            --          --
Percentage of Total Leased Square
 Feet.................................      --             --          --         100.0%           --            --          --
Final Annual Base Rent Under Expiring
 Leases(2)............................      --             --          --      $140,000            --            --          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............      --             --          --         $3.50            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --         100.0%           --            --          --
Number of Leases Expiring.............      --             --          --             1            --            --          --
 
<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
ACQUISITION PROPERTIES:
HORSHAM/WILLOW GROVE/JENKINTOWN PA
700/800 Business Center Drive
Square Footage of Expiring Leases.....          --          --          --            --       28,475          82,009
Percentage of Total Leased Square
 Feet.................................          --          --          --            --         34.7 %         100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --     $418,583      $1,266,771
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --       $14.70          $15.45
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --         33.0 %         100.0%
Number of Leases Expiring.............          --          --          --            --            1               6
KING OF PRUSSIA, PA
500 North Gulph Road
Square Footage of Expiring Leases.....          --          --          --            --           --          79.945
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --           --      $1,421,402
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --          $17.78
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --              12
Bucks County, PA
2200 Cabot Boulevard
Square Footage of Expiring Leases.....          --          --          --            --           --          55,081
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --           --        $242,428
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --           $4.40
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               3
2250 Cabot Boulevard
Square Footage of Expiring Leases.....          --          --          --            --           --          40,000
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --           --        $140,000
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --           $3.50
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               1
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       79
<PAGE>   18
<TABLE>
<CAPTION>
       YEAR OF LEASE EXPIRATION        1996(1)        1997         1998         1999          2000          2001         2002
- -------------------------------------- --------    ----------    --------    ----------    ----------    ----------    --------
<S>                                    <C>         <C>           <C>         <C>           <C>           <C>           <C>
ACQUISITION PROPERTIES (CONTINUED):
2260/2270 Cabot Boulevard
Square Footage of Expiring Leases.....  11,283          7,356       8,203            --         2,796            --          --
Percentage of Total Leased Square
 Feet.................................    38.1 %         24.8%       27.7%           --           9.4%           --          --
Final Annual Base Rent Under Expiring
 Leases(2)............................ $94,613        $72,021     $70,782            --       $34,111            --          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............   $8.39          $9.79       $8.63            --        $12.20            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................    34.9 %         26.5%       26.1%           --          12.6%           --          --
Number of Leases Expiring.............       3              4           3            --             1            --          --
3000 Cabot Boulevard
Square Footage of Expiring Leases.....   1,900         10,840      11,378         4,933            --            --          --
Percentage of Total Leased Square
 Feet.................................     6.5 %         37.3%       39.2%         17.0%           --            --          --
Final Annual Base Rent Under Expiring
 Leases(2)............................ $34,200       $173,440    $203,048       $84,101            --            --          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............  $18.00         $16.00      $17.85        $17.05            --            --          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     6.9 %         35.1%       41.1%         17.0%           --            --          --
Number of Leases Expiring.............       1              1           2             2            --            --          --
GREENWOOD SQUARE
Square Footage of Expiring Leases.....   6,500         80,658      16,105        11,373         3,730        28,454       4,433
Percentage of Total Leased Square
 Feet.................................     4.3 %         52.8%       10.6%          7.5%          2.4%         18.6%        2.9%
Final Annual Based Rent Under Expiring
 Leases(2)............................ $141,440    $1,334,481    $262,484      $193,957       $70,684      $460,126     $82,764
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............  $21.76         $16.54      $16.30        $17.05        $18.95        $16.17      $18.67
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................     5.6 %         52.4%       10.3%          7.6%          2.8%         18.1%        3.2%
Number of Leases Expiring.............       1             10           6             5             1             6           1
Burlington County, NJ
8000 Lincoln Drive
Square Footage of Expiring Leases.....      --             --          --            --            --        36,830          --
Percentage of Total Leased Square
 Feet.................................      --             --          --            --            --          67.1%         --
Final Annual Base Rent Under Expiring
 Leases(2)............................      --             --          --            --            --      $662,940          --
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............      --             --          --            --            --        $18.00          --
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................      --             --          --            --            --          67.2%         --
Number of Leases Expiring.............      --             --          --            --            --             1          --
 
ACQUISITION PROPERTIES (CONTINUED):

<CAPTION>
                                                                                             2007 AND
       YEAR OF LEASE EXPIRATION            2003         2004        2005         2006       THEREAFTER       TOTAL
- --------------------------------------  ----------    --------    --------    ----------    ----------    -----------
<S>                                      <C>          <C>         <C>         <C>           <C>           <C>
2260/2270 Cabot Boulevard
Square Footage of Expiring Leases.....          --          --          --            --           --          29,638
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --           --        $271,527
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --           $9.16
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --              11
3000 Cabot Boulevard
Square Footage of Expiring Leases.....          --          --          --            --           --          29,051
Percentage of Total Leased Square
 Feet.................................          --          --          --            --           --           100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --           --        $494,789
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --          $17.03
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --           --               6
GREENWOOD SQUARE
Square Footage of Expiring Leases.....          --          --          --            --        1,501         152,754
Percentage of Total Leased Square
 Feet.................................          --          --          --            --          1.0 %         100.0%
Final Annual Based Rent Under Expiring
 Leases(2)............................          --          --          --            --           --      $2,545,336
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --           --          $16.67
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --           --           100.0%
Number of Leases Expiring.............          --          --          --            --            1              31
Burlington County, NJ
8000 Lincoln Drive
Square Footage of Expiring Leases.....          --          --          --            --       18,093          54,923
Percentage of Total Leased Square
 Feet.................................          --          --          --            --         32.9 %         100.0%
Final Annual Base Rent Under Expiring
 Leases(2)............................          --          --          --            --     $323,865        $986,805
Final Annual Base Rent per Square Foot
 under Expiring Leases(3).............          --          --          --            --       $17.90          $17.97
Percentage of Total Final Annual Base
 Rent Represented by Expiring
 Leases...............................          --          --          --            --         32.8 %         100.0%
Number of Leases Expiring.............          --          --          --            --            1               2
</TABLE>
 
- ---------------
Footnotes appear on page 81.
 
                                       80
<PAGE>   19
<TABLE>
<CAPTION>
    YEAR OF LEASE EXPIRATION      1996(1)         1997          1998          1999          2000          2001         2002
- -------------------------------- ----------    ----------    ----------    ----------    ----------    ----------    --------
<S>                              <C>           <C>           <C>           <C>           <C>           <C>           <C>
Northern Suburban Wilmington
One Righter Parkway
Square Footage of Expiring
 Leases.........................      1,200         2,681            --         7,933            --            --          --
Percentage of Total Leased
 Square Feet....................        1.1%          2.6%           --           7.6%           --            --          --
Final Annual Base Rent Under
 Expiring Leases(2).............    $21,000       $45,577            --      $150,651            --            --          --
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................     $17.50        $17.00            --        $18.99            --            --          --
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................        0.9%          1.9%           --           6.1%           --            --          --
Number of Leases Expiring.......          1             1            --             3            --            --          --
 
<CAPTION>
                                                                                           2007 AND
    YEAR OF LEASE EXPIRATION         2003          2004          2005          2006       THEREAFTER       TOTAL
- --------------------------------  ----------    ----------    ----------    ----------    ----------    -----------
<S>                                <C>          <C>           <C>           <C>           <C>           <C>
Northern Suburban Wilmington
One Righter Parkway
Square Footage of Expiring
 Leases.........................          --            --        93,014            --           --         104,828
Percentage of Total Leased
 Square Feet....................          --            --          88.7%           --           --           100.0%
Final Annual Base Rent Under
 Expiring Leases(2).............          --            --    $2,252,799            --           --      $2,470,027
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................          --            --        $24.22            --           --          $23.56
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................          --            --          91.2%           --           --           100.0%
Number of Leases Expiring.......          --            --             1            --           --               6
</TABLE>
 
- ---------------
 
(1) Represents lease expirations from September 30, 1996 to December 31, 1996.
 
(2) Represents annual base rent for the final annual period in accordance with
    lease terms.
 
(3) Calculated by dividing the annual base rent for the final annual period by
    the net rentable square feet subject to such leases.
 
CONSOLIDATED TOTALS FOR ACQUISITION PROPERTIES
<TABLE>
<CAPTION>
    YEAR OF LEASE EXPIRATION      1996(1)         1997          1998          1999          2000          2001         2002
- -------------------------------- ----------    ----------    ----------    ----------    ----------    ----------    --------
<S>                              <C>           <C>           <C>           <C>           <C>           <C>           <C>
Square Footage of Expiring
 Leases.........................     23,245       130,449        42,303       143,085        35,008       108,623       4,433
Percentage of Total Leased
 Square Feet....................        3.7%         20.8%          6.7%         22.8%          5.6%         17.2%        0.7%
Final Annual Base Rent Under
 Expiring Leases(2).............   $334,950    $1,866,640      $659,835    $1,605,792      $445,238    $1,849,219     $82,764
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................     $14.41        $14.31        $15.60        $11.22        $12.72        $17.02      $18.67
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................        3.4%         19.0%          6.7%         16.3%          4.5%          8.8%        0.8%
Number of Leases Expiring.......          7            18            14            20             4            10           1
 
<CAPTION>
                                                                                           2007 AND
    YEAR OF LEASE EXPIRATION         2003          2004          2005          2006       THEREAFTER       TOTAL
- --------------------------------  ----------    ----------    ----------    ----------    ----------    -----------
<S>                                <C>          <C>           <C>           <C>           <C>           <C>
Square Footage of Expiring
 Leases.........................          --            --        93,014            --       48,069         628,229
Percentage of Total Leased
 Square Feet....................          --            --          14.8%           --          7.7 %         100.0%
Final Annual Base Rent Under
 Expiring Leases(2).............          --            --    $2,252,799            --     $742,447      $9,839,684
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................          --            --        $24.22            --       $15.45          $15.66
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................          --            --          22.9%           --          7.6 %         100.0%
Number of Leases Expiring.......          --            --             1            --            3              78
</TABLE>
 
- ---------------
 
(1) Represents lease expirations from September 30, 1996 to December 31, 1996.
 
(2) Represents annual base rent for the final annual period in accordance with
    lease terms.
 
(3) Calculated by dividing the annual base rent for the final annual period by
    the net rentable square feet subject to such leases.
 
CONSOLIDATED TOTALS FOR ALL PROPERTIES
<TABLE>
<CAPTION>
    YEAR OF LEASE EXPIRATION      1996(1)         1997          1998          1999          2000          2001         2002
- -------------------------------- ----------    ----------    ----------    ----------    ----------    ----------    --------
<S>                              <C>           <C>           <C>           <C>           <C>           <C>           <C>
Square Footage of Expiring
 Leases.........................     77,249       246,335       142,924       439,297        97,678       321,349      13,345
Percentage of Total Leased
 Square Feet....................        4.1%         13.1%          7.6%         22.8%          5.2%         17.1%        0.7%
Final Annual Base Rent Under
 Expiring Leases(2)............. $1,011,084    $3,568,563    $1,637,739    $4,100,854    $1,319,720    $4,820,094    $252,092
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................     $13.09        $14.49        $11.46         $9.34        $13.51        $15.00      $18.89
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................        4.0%         14.2%          6.5%         16.3%          5.3%         19.2%        1.0%
Number of Leases Expiring.......         22            60            34            48            14            30           2
 
<CAPTION>
                                                                                           2007 AND
    YEAR OF LEASE EXPIRATION         2003          2004          2005          2006       THEREAFTER       TOTAL
- --------------------------------  ----------    ----------    ----------    ----------    ----------    -----------
<S>                                <C>          <C>           <C>           <C>           <C>           <C>
Square Footage of Expiring
 Leases.........................     109,336         9,262       112,401       145,449      164,788       1,879,413
Percentage of Total Leased
 Square Feet....................         5.8%          0.5%          6.0%          7.7%         8.8 %         100.0%
Final Annual Base Rent Under
 Expiring Leases(2).............  $1,361,239      $185,240    $2,618,363    $1,942,732    $2,322,565    $25,140,285
Final Annual Base Rent per
 Square Foot under Expiring
 Leases(3)......................      $12.45        $20.00        $23.29        $13.36        $9.24          $13.38
Percentage of Total Final Annual
 Base Rent Represented by
 Expiring Leases................         5.4%          0.7%         10.4%          7.7%         9.3 %         100.0%
Number of Leases Expiring.......           7             1             3             6            5             232
</TABLE>
 
- ---------------
 
(1) Represents lease expirations from September 30, 1996 to December 31, 1996.
 
(2) Represents annual base rent for the final annual period in accordance with
    lease terms.
 
(3) Calculated by dividing the annual base rent for the final annual period by
    the net rentable square feet subject to such leases.
 
                                       81
<PAGE>   20
 
HISTORICAL TENANT IMPROVEMENTS AND LEASING COMMISSIONS
 
     The following table sets forth certain historical information regarding
tenant improvements ("TI") and leasing commission ("LC") costs attributable to
leases that commenced (i.e., the date the renewal or replacement tenant began to
pay rent) for the Initial Properties during each of the periods presented. TI
and LC costs for commenced leases during a particular period do not equal the
cash paid during such period due to the timing of payments. The following
results for the nine-month period ended September 30, 1996 are not necessarily
indicative of the results that may be expected for the full fiscal year.
Historical TI and LC data relating to the Acquisition Properties was not made
available to the Company.
 
<TABLE>
<CAPTION>
                                                                       JANUARY 1 TO        TOTAL/WEIGHTED
                               1993         1994         1995       SEPTEMBER 30, 1996        AVERAGE
                             --------     --------     --------     ------------------     --------------
<S>                          <C>          <C>          <C>               <C>                 <C>
NEW TENANTS(1)(2)
Number of Leases...........        21            8           31                17                    77
Square feet of re-tenanted
  space....................    91,590       52,312(2)   168,618           160,863               473,383
TI per square foot.........  $   7.01     $  22.72(2)  $   4.26          $   3.88            $     6.70
LC per square foot.........  $   2.87     $   2.67     $   2.19          $   1.42            $     2.11
                             --------     --------     --------          --------            ----------
  Total TI and LC per
     square foot...........  $   9.88     $  25.39(2)  $   6.45          $   5.30            $     8.81
                             ========     ========     ========          ========            ==========
RENEWAL/EXPANSION LEASES(1)
Number of Leases...........        24           29           32                20                   105
Square feet of
  Renewals/Expansions......    72,961      122,178      308,331           148,309               651,779
TI per square foot.........  $   4.21     $   4.31     $   4.88          $   3.46            $     4.38
LC per square foot.........  $    .64     $   2.13     $   0.79          $   1.14            $     1.10
                             --------     --------     --------          --------            ----------
  Total TI and LC per
     square foot...........  $   4.85     $   6.44     $   5.67          $   4.60            $     5.48
                             ========     ========     ========          ========            ==========
TOTAL NEW TENANTS AND
  RENEWAL/EXPANSION
  LEASES(1)(2)
Number of Leases...........        45           37           63                37                   182
Square feet................   164,551      174,490      476,949           309,172             1,125,162
TI per square foot.........  $   5.77     $   9.83     $   4.66          $   3.68            $     5.36
LC per square foot.........  $   1.88     $   2.29     $   1.28          $   1.29            $     1.52
                             --------     --------     --------          --------            ----------
  Total TI and LC per
     square foot...........  $   7.65     $  12.12     $   5.94          $   4.97            $     6.88
                             ========     ========     ========          ========            ==========
</TABLE>
 
- ---------------
(1) Includes TI and LC costs relating to the 23 Initial Properties that are
    office buildings and excludes the one industrial property.
(2) Represents costs associated with conversion of approximately 44,000 net
    rentable square feet of warehouse/laboratory space to office space.
 
                                       82
<PAGE>   21
 
HISTORICAL CAPITAL EXPENDITURES
 
     The following table sets forth information relating to the combined
historical capital expenditures (excluding those expenditures which are
recoverable from tenants) of the 23 Initial Properties that are office
buildings. Historical capital expenditure data relating to the Acquisition
Properties was not made available to the Company.
 
<TABLE>
<CAPTION>
                                                                                        JANUARY 1 TO
                                                                                        SEPTEMBER 30,
                                              1993           1994           1995            1996
                                           ----------     ----------     ----------     -------------
<S>                                        <C>            <C>            <C>            <C>
Number of Net Rentable Square Feet(1)....   1,027,431      1,027,431      1,032,764        1,082,257
Capital Expenditures Incurred............  $       --     $   46,060     $   78,601      $   126,738
Capital Expenditures per net rentable
  square foot............................  $       --     $     0.04     $     0.08      $      0.12
Annual Weighted Average per square foot
(January 1, 1993 to September 30, 1996)............................................      $      0.06
</TABLE>
 
- ---------------
 
(1) Net rentable square feet are weighted to reflect the acquisitions of 168
    Franklin Corner Road in November 1995 and the LibertyView Building (457
    Haddonfield Road) in July 1996. In all instances the one industrial property
    (1510 Gehman Road) included in the Initial Properties and the Acquisition
    Properties are excluded from the calculations.
 
POTENTIAL REVENUE INCREASE AT REPLACEMENT COST RENTS
 
     The Company believes that the SSI/TNC Properties, the Acquisition
Properties and LibertyView have been purchased at substantial discounts to
replacement cost and have the potential for significant internal revenue growth
as rental rates for office properties in their respective submarkets recover to
levels that would provide a reasonable return on investment to a developer of a
new Class A multi-tenant office building ("Replacement Cost Rents").
 
                    ESTIMATED REPLACEMENT COST RENT ANALYSIS
                         MULTI-TENANT OFFICE BUILDINGS
                         (PER NET RENTABLE SQUARE FOOT)
 
<TABLE>
<CAPTION>
                                                                   SUBURBAN MARKET(1)
                                                                   -------------------
                                                                     LOW        HIGH
                                                                   -------     -------
        <S>                                                        <C>         <C>
        Total Construction (Replacement) Costs(1)................  $135.00     $145.00
        Estimated Replacement Cost Rents(1)......................  $ 22.00     $ 24.00
        Weighted Average Class A Rental Rates(2).................  $ 18.94     $ 18.94
                                                                   -------     -------
        Increase in Class A Rental Rates Necessary to Reach
          Replacement Cost Rents.................................  $  3.06     $  5.06
        Percentage Increase in Class A Rental Rates Necessary to
          Reach Replacement Cost Rents...........................    16.2 %      26.7 %
</TABLE>
 
- ---------------
(1) Replacement cost data obtained from C&W Market Analyses. C&W consulted the
    Marshall Valuation Service, a nationally recognized construction cost
    manual, which indicated that the total cost of development ranges from
    approximately $135 to $145 per square foot. This cost includes land, both
    direct and indirect costs of construction, a contingency for initial leasing
    expenses and an allowance for overhead. This Replacement Cost Rents data
    excludes any provision for developers' profit.
(2) Market estimate, provided by C&W.
 
     The Company believes that large corporate users of Class A office space are
beginning to face a shortage of large contiguous blocks of Class A space. This
is illustrated by the fact that, according to C&W, there has been extremely
limited office development for the period from January 1, 1995 to June 30, 1996
(approxi-
 
                                       83
<PAGE>   22
 
mately 255,000 net rentable square feet of new office development out of a total
inventory of approximately 43.7 million square feet of office space in the
submarkets where the Properties are located).
 
                   HISTORICAL SQUARE FEET UNDER CONSTRUCTION
                                PHILADELPHIA MSA
                                    [CHART]
 

<TABLE>
<CAPTION>
    1991          1992        1993         1994        1995        JUNE 30, 1996
    ----          ----        ----         ----        ----        -------------
 <S>            <C>          <C>          <C>         <C>             <C>     
 1,359,500      332,000      157,290      52,390      227,390         26,600
</TABLE>
 

HISTORICAL OCCUPANCY
 
     The table below sets forth the average occupancy rates, based on square
feet leased, of the Initial Properties at the indicated dates. Historical
occupancy data relating to the Acquisition Properties was not made available to
the Company.
 
<TABLE>
<CAPTION>
                                                      AGGREGATE RENTABLE     PERCENTAGE LEASED
                            DATE                        SQUARE FEET(1)       AT PERIOD END(2)
        --------------------------------------------  ------------------     -----------------
        <S>                                           <C>                    <C>
        September 30, 1996..........................       1,333,794               93.8%
        December 31, 1995...........................       1,212,056               89.7%
        December 31, 1994...........................       1,180,056               94.0%
        December 31, 1993...........................       1,180,056               92.1%
        December 31, 1992...........................       1,180,056               91.4%
        December 31, 1991...........................       1,180,056               83.8%
</TABLE>
 
- ---------------
(1) The Properties at 168 Franklin Corner Road and 457 Haddonfield Road
    (LibertyView) are excluded from the data for these years because the Company
    acquired such Properties subsequent to the applicable period. 168 Franklin
    Corner Road was acquired in November 1995 and, at that time, was 54% leased.
    457 Haddonfield Road was acquired in July 1996, and at that time was 67%
    leased.
 
(2) Percentage leased for four of the Initial Properties (One, Two and Three
    Greentree Centre and Twin Forks Office Park) is as of January 31. The
    Company does not believe that percentages at December 31 for such Properties
    are materially different than the percentages at January 31.
 
                                       84
<PAGE>   23
 
               OCCUPANCY AND RENTAL RATES -- PROPERTY BY PROPERTY
 
     The following table sets forth the occupancy rates, average annual
effective rental rate per leased square foot and total annual rental revenue for
each of the Initial Properties during the periods specified. Historical
occupancy data and average annual effective rental rates relating to the
Acquisition Properties were not made available to the Company.
 
<TABLE>
<CAPTION>
                                                                                                                  AS OF AND
                                                                                                                   FOR THE
                                                                                                                   PERIOD
                                                            YEAR ENDED DECEMBER 31,                                 ENDED
                                     ----------------------------------------------------------------------     SEPTEMBER 30,
                                        1991           1992           1993           1994           1995            1996
                                     ----------     ----------     ----------     ----------     ----------     -------------
<S>                                  <C>            <C>            <C>            <C>            <C>            <C>
HORSHAM/WILLOW GROVE/
  JENKINTOWN, PA
650 DRESHER ROAD
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    17.39     $    17.39     $    17.09     $    16.89     $    15.23        $ 16.50
  Total Annual Rental Revenue
    (2)..........................    $  524,000     $  524,000     $  515,000     $  509,000     $  306,000         --
1155 BUSINESS CENTER DRIVE
  Percentage Leased at Period
    End..........................            99%           100%            96%            97%           100%            99%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.43     $    16.68     $    17.14     $    16.51     $    16.50        $ 17.22
  Total Annual Rental Revenue
    (2)..........................    $  751,000     $  854,000     $  863,000     $  813,000     $  827,000         --
500 ENTERPRISE ROAD
  Percentage Leased at Period
    End..........................            74%            74%            74%            93%            84%            98%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    11.92     $    12.80     $    13.70     $    11.55     $    13.13        $ 15.03
  Total Annual Rental Revenue
    (2)..........................    $  471,000     $  638,000     $  683,000     $  626,000     $  813,000         --
ONE PROGRESS AVENUE
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    12.64     $    12.06     $    11.88     $    12.56     $    11.45        $ 11.75
  Total Annual Rental Revenue
    (2)..........................    $1,001,000     $  955,000     $  941,000     $  995,000     $  907,000         --
SOUTHERN ROUTE 202
  CORRIDOR, PA
456 CREAMERY WAY
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $     8.82     $     5.13     $     7.71     $     7.18     $     7.12        $  7.25
  Total Annual Rental Revenue
    (2)..........................    $  420,000     $  244,000     $  367,000     $  342,000     $  339,000         --
486 THOMAS JONES WAY
  Percentage Leased at Period
    End..........................            66%            66%            88%            88%            86%          50.9%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    14.91     $    15.18     $    14.75     $    14.74     $    14.58        $ 15.46
  Total Annual Rental Revenue
    (2)..........................    $  416,000     $  517,000     $  646,000     $  669,000     $  649,000         --
</TABLE>
 
                                       85
<PAGE>   24
 
<TABLE>
<CAPTION>
                                                                                                                  AS OF AND
                                                                                                                   FOR THE
                                                                                                                   PERIOD
                                                            YEAR ENDED DECEMBER 31,                                 ENDED
                                     ----------------------------------------------------------------------     SEPTEMBER 30,
                                        1991           1992           1993           1994           1995            1996
                                     ----------     ----------     ----------     ----------     ----------     -------------
<S>                                  <C>            <C>            <C>            <C>            <C>            <C>
468 CREAMERY WAY
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    12.44     $    12.96     $    13.00     $    13.31     $    12.89        $ 13.88
  Total Annual Rental Revenue
    (2)..........................    $  360,000     $  375,000     $  376,000     $  385,000     $  373,000         --
110 SUMMIT DRIVE
  Percentage Leased at Period
    End..........................            79%            90%           100%           100%            87%            68%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $     8.30     $    10.13     $     9.42     $     9.60     $     8.46        $  7.20
  Total Annual Rental Revenue
    (2)..........................    $  314,000     $  356,000     $  377,000     $  419,000     $  360,000         --
BLUE BELL/PLYMOUTH MEETING/FORT
  WASHINGTON, PA
2240/50 BUTLER PIKE
  Percentage Leased at Period
    End..........................            79%           100%           100%           100%           100%            99%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    17.66     $    17.66     $    16.69     $    16.50     $    16.27        $ 17.55
  Total Annual Rental Revenue
    (2)..........................    $  819,000     $  842,000     $  871,000     $  861,000     $  849,000         --
120 WEST GERMANTOWN PIKE
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    19.28     $    20.26     $    20.66     $    20.43     $    18.73        $ 17.52
  Total Annual Rental Revenue
    (2)..........................    $  589,000     $  619,000     $  631,000     $  624,000     $  563,000         --
140 WEST GERMANTOWN PIKE
  Percentage Leased at Period
    End..........................           100%            72%            96%           100%           100%            99%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.65     $    16.86     $    16.19     $    15.34     $    15.61        $ 17.38
  Total Annual Rental Revenue
    (2)..........................    $  432,000     $  367,000     $  365,000     $  394,000     $  405,000         --
2260 BUTLER PIKE
  Percentage Leased at Period
    End..........................           100%           100%            75%            75%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.23     $    16.62     $    18.42     $    17.30     $    16.76        $ 17.82
  Total Annual Rental Revenue
    (2)..........................    $  497,000     $  530,000     $  455,000     $  416,000     $  436,000         --
MAIN LINE, PA
16 CAMPUS BOULEVARD
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%             0%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.57     $    17.53     $    18.68     $    18.15     $    17.22        $ 13.58
  Total Annual Rental Revenue
    (2)..........................    $1,122,000     $1,187,000     $1,265,000     $1,229,000     $1,069,000         --
18 CAMPUS BOULEVARD
  Percentage Leased at Period
    End..........................            35%            77%            77%            82%            82%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    18.33     $    16.94     $    17.69     $    17.56     $    17.14        $ 18.62
  Total Annual Rental Revenue
    (2)..........................    $  224,000     $  350,000     $  513,000     $  524,000     $  532,000         --
</TABLE>
 
                                       86
<PAGE>   25
 
<TABLE>
<CAPTION>
                                                                                                                  AS OF AND
                                                                                                                   FOR THE
                                                                                                                   PERIOD
                                                            YEAR ENDED DECEMBER 31,                                 ENDED
                                     ----------------------------------------------------------------------     SEPTEMBER 30,
                                        1991           1992           1993           1994           1995            1996
                                     ----------     ----------     ----------     ----------     ----------     -------------
<S>                                  <C>            <C>            <C>            <C>            <C>            <C>
LEHIGH VALLEY, PA
7310 TILGHMAN STREET
  Percentage Leased at Period
    End..........................            78%            90%            82%            82%            93%            99%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    10.26     $    10.91     $    11.85     $    11.99     $    11.23        $  8.89
  Total Annual Rental Revenue
    (2)..........................    $  366,000     $  350,000     $  402,000     $  395,000     $  393,000         --
7248 TILGHMAN STREET
  Percentage Leased at Period
    End..........................            96%            96%            83%            92%            92%            94%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    12.68     $    12.66     $    13.82     $    14.22     $    13.81        $ 14.76
  Total Annual Rental Revenue
    (2)..........................    $  439,000     $  522,000     $  537,000     $  549,000     $  557,000             --
6575 SNOWDRIFT ROAD
  Percentage Leased at Period
    End..........................           100%           100%           100%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $     7.82     $     7.98     $     8.09     $     8.52     $     7.35        $  7.15
  Total Annual Rental Revenue
    (2)..........................    $  315,000     $  369,000     $  374,000     $  394,000     $  340,000             --
1510 GEHMAN ROAD
  Percentage Leased at Period
    End..........................            50%            85%            85%           100%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $     5.53     $     5.82     $     7.47     $     7.27     $     7.21        $  4.72
  Total Annual Rental Revenue
    (2)..........................    $  419,000     $  676,000     $  969,000     $1,082,000     $1,101,000             --
BURLINGTON COUNTY, NJ
ONE GREENTREE CENTRE
  Percentage Leased at Period End
    (3)..........................            81%            97%           100%            93%            91%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.82     $    14.96     $    15.53     $    15.80     $    18.42        $ 16.07
  Total Annual Rental Revenue
    (2)..........................    $  815,000     $  744,000     $  855,000     $  854,000     $  949,000             --
TWO GREENTREE CENTRE
  Percentage Leased at Period End
    (3)..........................            83%            84%            79%            75%           100%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    16.74     $    17.78     $    18.49     $    16.18     $    13.60        $ 16.02
  Total Annual Rental Revenue
    (2)..........................    $  794,000     $  832,000     $  845,000     $  698,000     $  666,000             --
THREE GREENTREE CENTRE
  Percentage Leased at Period End
    (3)..........................           100%            95%           100%            74%            99%            96%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    17.77     $    17.77     $    18.35     $    15.94     $    15.78        $ 16.41
  Total Annual Rental Revenue
    (2)..........................    $1,226,000     $1,194,000     $1,234,000     $  957,000     $  942,000             --
</TABLE>
 
                                       87
<PAGE>   26
 
<TABLE>
<CAPTION>
                                                                                                                  AS OF AND
                                                                                                                   FOR THE
                                                                                                                   PERIOD
                                                            YEAR ENDED DECEMBER 31,                                 ENDED
                                     ----------------------------------------------------------------------     SEPTEMBER 30,
                                        1991           1992           1993           1994           1995            1996
                                     ----------     ----------     ----------     ----------     ----------     -------------
<S>                                  <C>            <C>            <C>            <C>            <C>            <C>
CAMDEN COUNTY, NJ
457 HADDONFIELD ROAD
  (LIBERTYVIEW)
  Percentage Leased at Period End
    (4)..........................            --             --             --             --             63%            83%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (4)..........................            --             --             --             --             --        $ 18.63
  Total Annual Rental Revenue
    (4)..........................            --             --             --             --             --             --
OTHER MARKETS
168 FRANKLIN CORNER ROAD,
  LAWRENCEVILLE, NJ
  Percentage Leased at Period End
    (5)..........................            --             --             --             --             55%            55%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (5)..........................            --             --             --             --     $    15.95        $ 15.55
  Total Annual Rental Revenue
    (5)..........................            --             --             --             --     $   23,000             --
5910-6090 SIX FORKS, RALEIGH, NC
  Percentage Leased at Period End
    (3)..........................            92%            93%            97%           100%            97%           100%
  Average Annual Effective Rental
    Rate Per Leased Square Foot
    (1)..........................    $    11.16     $    12.37     $    11.22     $    13.13     $    14.27        $ 14.25
  Total Annual Rental Revenue
    (2)..........................    $  630,000     $  833,000     $  779,000     $  944,000     $1,026,000             --
</TABLE>
 
- ---------------
 
(1) For the years ended December 31, 1991 through 1995, represents annual rental
    revenue divided by the average occupancy level. For the nine-month period
    ended September 30, 1996, represents: (i) for office leases written on a
    triple net lease basis, the sum of the annualized contracted base rental
    rates payable for all space leased as of September 30, 1996 without giving
    effect to free rent or scheduled rent increases that would be taken into
    account under generally accepted accounting principles plus the 1996
    budgeted operating expense excluding tenant electricity; and (ii) for office
    leases written on a full service basis, the annualized contracted base
    rental rate payable for all space leased as of September 30, 1996 without
    giving effect to free rent or scheduled rent increases that would be taken
    into account under generally accepted accounting principles. In both cases,
    the annualized rental is divided by the total square footage leased as of
    September 30, 1996.
(2) Represents rental revenue including tenant reimbursements, determined on a
    straight-line basis in accordance with generally accepted accounting
    principles. Tenant reimbursements generally include payment of real estate
    taxes, operating expenses and escalations and common area maintenance and
    utility charges.
(3) Percentage leased for four of the Properties (One, Two and Three Greentree
    Centre and Twin Forks Office Park) is as of January 31. The Company does not
    believe that percentages at December 31 for such Properties are materially
    different than the percentages at January 31.
(4) Property acquired in July 1996.
(5) Property acquired in November 1995.
 
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SUBMARKETS AND PROPERTY INFORMATION
 
     The Properties owned and operated by the Company contain an aggregate of
approximately 2.0 million net rentable square feet. Thirty-five of the
Properties are located in the Market. The C&W Mid-Year Report divides the six
Pennsylvania counties included within the Market into nine submarkets. While the
Company considers all nine of these Pennsylvania submarkets and the two southern
New Jersey counties within the Market as its primary market, its currently owned
Properties are concentrated in several key submarket areas. These submarkets are
discussed below. Unless otherwise indicated, the market data contained in the
following discussion have been derived from the C&W Mid-Year Report and from
nine additional market analyses prepared by C&W at the request of the Company
(the "C&W Market Analyses").
 
                        HORSHAM/WILLOW GROVE/JENKINTOWN
 
     The Company owns four Initial Properties and will acquire two Properties in
the Horsham/Willow Grove/Jenkintown submarket. This submarket contains, as of
June 30, 1996, approximately 3.3 million net rentable square feet of commercial
office space. As of June 30, 1996, total vacancy was approximately 12.1%, down
from 15.6% as of June 30, 1995. Demand for office space in this submarket has
historically come from the movement of users outward from Philadelphia and from
the formation of new high-tech/service oriented businesses.
 
HORSHAM BUSINESS CENTER
 
     Horsham Business Center is a business park developed by the Company and
consists of 16 Class A suburban office buildings aggregating approximately
600,000 net rentable square feet. Horsham Business Center is located on the
northwestern side of the Philadelphia metropolitan area in Montgomery County,
Pennsylvania.
 
     As of June 30, 1996, the direct competition to the Company's Properties
within this submarket consisted of approximately 1.1 million net rentable square
feet of existing Class A office space (in 22 buildings), with an overall vacancy
rate of 8.9%, as compared to 17.2% as of June 30, 1995. The weighted average
asking rental rate in directly competitive properties is $18.02 per square foot
compared to the average existing rental rates of $16.50 and $17.22 in the
Company's two buildings as of September 30, 1996.
 
     650 Dresher Road
 
          650 Dresher Road is a one story office building completed in 1984.
     This Property contains 30,138 net rentable square feet and is situated on
     4.2 acres. This Property is constructed of structural steel framing with a
     brick exterior. As of September 30, 1996, this Property was 100% leased to
     GMAC Mortgage Corporation at an average annualized existing base rent of
     $11.75 per leased square foot. After factoring in 1996 projected operating
     expense recoveries, the annualized existing rental rate at the building as
     of August 31, 1996 excluding tenant utilities was $16.50 per leased square
     foot. The lease is scheduled to expire in May 2003 and is structured on a
     triple net basis which allows for a complete pass through of all property
     operating expenses.
 
     1155 Business Center Drive
 
          1155 Business Center Drive is a two story office building completed in
     1990. This Property contains 51,388 net rentable square feet and is
     situated on 5 acres. This Property is constructed of structural steel
     framing with a brick exterior. As of September 30, 1996, this Property was
     99.4% leased to four tenants with an average annualized existing base rent
     of $12.37 per leased square foot. After factoring in 1996 projected
     operating expense recoveries, the average annualized existing rental rate
     at the building as of September 30, 1996 excluding tenant utilities was
     $17.22 per leased square foot. The largest tenant in this property is IMS
     (International Mill Service) occupying 40,774 square feet or 79.4% of the
     total net rentable square feet, with a lease scheduled to expire in March
     2006. There are no existing leases at this property that are scheduled to
     expire in 1996 or 1997.
 
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     700/800 Horsham Business Center Drive (Acquisition Properties)
 
          700/800 Business Center Drive is a two building, one and two story
     office complex completed in 1986. These buildings aggregate 82,009 net
     rentable square feet and are situated on 13.2 acres. The buildings are
     constructed of structural steel framing with a brick exterior. As of
     September 30, 1996, the buildings were 100% leased to five tenants. After
     factoring in 1996 projected operating expense recoveries, the average
     annualized existing rental rate at the buildings as of September 30, 1996
     excluding tenant utilities was $14.60 per leased square foot. The primary
     tenant, is Metpath, which occupies 28,475 net rentable square feet,
     expanding to 51,236 net rentable square feet in July 1999, under a lease
     scheduled to expire in January 2012.
 
KEITH VALLEY BUSINESS CENTER
 
     Keith Valley Business Center contains two office buildings, and is located
in Horsham, Montgomery County, Pennsylvania. Keith Valley Business Center is
located several miles from, and is within the same submarket as, Horsham
Business Center.
 
     500 Enterprise Road
 
          500 Enterprise Road is a one story office/flex building completed in
     1990. This Property contains 67,800 net rentable square feet and is
     situated on 7.4 acres. This Property is constructed of structural steel
     framing with a brick exterior. As of September 30, 1996, this Property was
     98.5% leased to two tenants, with an average annualized existing base rent
     per leased square foot of $10.75. After factoring in 1996 projected
     operating expense recoveries, the average annualized existing rental rate
     at this Property as of September 30, 1996 excluding tenant utilities was
     $15.03 per leased square foot. Conti Trade Services Corporation, a wholly
     owned subsidiary of Continental Grain, leases 53,906 square feet
     (representing 79.6% of the net rentable square feet) under a lease
     scheduled to expire in April 2001, provided that Conti Trade Services
     Corporation may terminate the lease in April 2000 with a penalty payment.
     The other lessee (constituting 12,845 net rentable square feet) at this
     Property is Pioneer Technologies, under a lease scheduled to expire in
     October 2000. This property competes for tenants in the same office
     submarket as the Properties in the Horsham Business Center.
 
     One Progress Drive
 
          One Progress Drive is a two story office building completed in 1986.
     This Property contains 79,204 net rentable square feet and is constructed
     of structural steel framing with a brick exterior. As of September 30,
     1996, this Property was 100% leased to Reed Technology at an average
     existing base rent per leased square foot of $9.25. After factoring in 1996
     projected operating expense recoveries, the annualized existing rental rate
     at the building as of September 30, 1996, excluding tenant utilities, is
     $11.75 per leased square foot. Reed Technology is a wholly-owned subsidiary
     of Reed Elsevier, and the lease is scheduled to expire in June 2011. In
     connection with this tenancy, the interior of the building was
     substantially renovated at the tenant's expense. The lease contains the
     following two early termination provisions: in July 2001 the tenant may
     terminate the lease upon one year's prior written notice to the Company and
     by making a termination payment of $3.2 million; in July 2006 the tenant
     may terminate the lease upon one year's written notice and by making a
     termination payment of $840,000. According to C&W, One Progress Drive
     competes for tenants in the same office submarket as the Horsham Business
     Center properties. The tenant has a right of first offer to purchase this
     Property during the term of its lease.
 
                          SOUTHERN ROUTE 202 CORRIDOR
 
     The Company owns four Properties in the Southern Route 202 Corridor
submarket. This submarket contains, as of June 30, 1996, approximately 3.5
million net rentable square feet of commercial office space and an additional
approximately 2.6 million net rentable square feet of flex space. As of June 30,
1996, total vacancy for commercial office space in this submarket was
approximately 13.9%, down from 22.9% as of
 
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June 30, 1995. Over the 18-month period ended June 30, 1996, net absorption of
office space in this submarket averaged 39,800 square feet per quarter or
approximately 160,000 square feet per annum. Leasing activity during this period
averaged approximately 100,000 square feet per quarter or 400,000 square feet
per annum. As of June 30, 1996, total vacancy for flex space in this submarket
was approximately 2.8%, down from 8.5% at the end of the first quarter of 1995.
 
     The Company's Properties in this submarket are located in two separate
business complexes: Whitelands Business Park and Oaklands Corporate Center, in
which the Company developed a total of seven buildings. Of these seven
buildings, four were build-to-suit and were sold to the occupant. The buildings
were constructed between 1987 and 1990, contain an aggregate of 171,698 net
rentable square feet and are situated on 17.6 acres.
 
OAKLANDS BUSINESS CENTER
 
     456 Creamery Way
 
          456 Creamery Way is a single story office/flex building completed in
     1987. This Property contains 47,604 net rentable square feet and is
     situated on 5.2 acres and is currently 100% leased to Neutronics, Inc.
     under a lease scheduled to expire in January 2003 at an existing rental
     rate of $7.25 per square foot. This lease is written on a triple net basis
     and, pursuant to its terms, the tenant contracts directly with third
     parties that provide building services, including landscaping, janitorial
     service and snow removal.
 
     486 Thomas Jones Way
 
          486 Thomas Jones Way is a two story office building completed in 1990.
     This Property contains 51,500 net rentable square feet and is situated on
     4.6 acres. This Property is constructed of steel framing with a brick
     exterior. As of September 30, 1996, this Property was 50.93% leased to
     seven tenants at an average annualized existing rental rate of $11.54 per
     square foot. After factoring in 1996 projected operating expense
     recoveries, the average annualized existing rental rate at this Property as
     of September 30, 1996 excluding tenant utilities was $15.46 per leased
     square foot. The primary tenant at this Property is First American Real
     Estate, which occupies 10,086 square feet under a lease scheduled to expire
     in December 1999.
 
     468 Creamery Way
 
          468 Creamery Way is a single story office building completed in 1990.
     This Property contains 28,934 net rentable square feet and is situated on
     2.6 acres. As of September 30, 1996, this Property was 100% leased to two
     tenants at an average annualized existing rental rate of $10.08 per square
     foot. After factoring in 1996 projected operating expense recoveries, the
     average annualized existing rental rate at this Property as of September
     30, 1996 excluding tenant utilities was $13.88 per leased square foot. The
     primary tenant at this Property is Franciscan Health System, which occupies
     23,588 square feet under a lease scheduled to expire in June 1999.
 
WHITELANDS BUSINESS CENTER
 
     110 Summit Drive
 
          110 Summit Drive is a single story office building completed in 1985.
     This Property contains 43,660 net rentable square feet and is situated on
     5.2 acres. As of September 30, 1996, this Property was 67.6% leased to
     three tenants at an average existing base rent of $7.20 per square foot.
     The primary tenant is Maris Equipment, which occupies 21,580 square feet
     under a lease scheduled to expire in April 1999.
 
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                   BLUE BELL/PLYMOUTH MEETING/FORT WASHINGTON
 
     The Company owns four Properties in the Blue Bell/Plymouth Meeting/Fort
Washington submarket. As of June 30, 1996, this submarket contains approximately
4.9 million square feet of commercial office space. As of June 30, 1996, total
vacancy for commercial office space was approximately 6.9%, down from 11.8% as
of June 30, 1995. As of September 30, 1996, there were no projects under
construction. Absorption of office space in this submarket has averaged 55,000
square feet per quarter or 218,000 square feet annually during the 18-month
period ended June 30, 1996. Leasing activity has averaged approximately 95,000
square feet per quarter or 380,000 square feet per annum during the 18-month
period ended June 30, 1996.
 
MEETINGHOUSE BUSINESS CENTER
 
     Meetinghouse Business Center was developed by the Company and consists of
five office buildings aggregating approximately 140,000 net rentable square
feet. This complex is located on the northeastern side of the Philadelphia
metropolitan area in Montgomery County, Pennsylvania. The buildings were
completed in 1984 and are situated on 20.5 acres. The buildings are one and two
story, with structural steel framing and stone and stucco exteriors. This
complex was developed consistent with the requirements of the Meetinghouse
historical district. The complex is at the interchange of the Pennsylvania
Turnpike (both East-West and Northeast Extension) and Interstate 476, which is
the largest interchange on the Pennsylvania Turnpike.
 
     Meetinghouse Business Center competes for tenants in the Blue Bell/Plymouth
Meeting/Fort Washington submarket which consists of approximately 4.9 million
square feet. As of June 30, 1996, total vacancy in this marketplace was 6.9%,
which represents a significant decline from 11.8% as of June 30, 1995. C&W
identified five other buildings which directly compete with Meetinghouse
Business Center. These buildings aggregate 443,000 net rentable square feet, and
as of June 30, 1996 were less than 1.9% vacant. Average annual asking rental
rates for this direct competition range from $18.00 to $19.00 per square foot
while existing tenants at this Property were paying $15.45 to $18.60 per square
foot as of September 30, 1996.
 
     2240/50 Butler Pike
 
          2240/50 Butler Pike is a one story office building completed in 1984.
     This Property contains 52,183 net rentable square feet and is situated on
     7.5 acres. As of September 30, 1996, this Property was 99.4% leased to
     three tenants. The primary tenant is CoreStates Bank, which occupies 30,359
     net rentable square feet (representing 58% of the aggregate net rentable
     square feet at the Property) at an existing annualized rental rate of
     $13.50 per square foot under a lease scheduled to expire in April 2006. The
     other major tenant in this Property is Worldwide Marketing, which occupies
     17,080 net rentable square feet (representing 33% of the net rentable
     square feet at the Property) at an existing annualized rental rate of
     $11.00 per square foot under a lease scheduled to expire in October 1999.
     After factoring in 1996 projected operating expense recoveries, the annual
     average existing rental rate for this Property as of September 30, 1996
     (excluding tenant utilities) was $17.55 per leased square foot.
 
     120 W. Germantown Pike
 
          120 W. Germantown Pike is a two story office building completed in
     1984. This Property contains 30,546 net rentable square feet and is
     situated on 3.2 acres. As of September 30, 1996, this Property was 100%
     leased to three tenants. The primary tenant is Clair O'Dell, a regional
     insurance agency, which occupies 25,177 net rentable square feet
     (representing 82% of the net rentable square feet at the Property) under a
     lease scheduled to expire in July 2001 at an existing annualized rental
     rate of $17.50 per square foot. After factoring in 1996 projected operating
     expense recoveries, the average annual existing rental rate for this
     Property as of September 30, 1996 excluding tenant utilities was $17.52 per
     leased square foot.
 
     140 W. Germantown Pike
 
          140 W. Germantown Pike is a two story office building completed in
     1984. This Property contains 25,953 net rentable square feet and is
     situated on 3.6 acres. As of September 30, 1996, this Property was
 
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     98.7% leased to four tenants. The primary tenant is Healthcare, Inc., which
     occupies 11,822 net rentable square feet (representing 46% of the net
     rentable square feet at the Property) under a lease scheduled to expire in
     September 1999 at an average annualized existing rental rate of $12.50
     square foot. After factoring in 1996 projected operating expense
     recoveries, the annual existing rental rate for all tenants at this
     Property as of September 30, 1996 (excluding tenant utilities) was $17.38
     per leased square foot.
 
     2260 Butler Pike
 
          2260 Butler Pike is a one story office building completed in 1984.
     This Property contains 31,892 net rentable square feet and is situated on
     6.2 acres. As of September 30, 1996, this Property was 100% leased to three
     tenants. The primary tenant is Information Resources, which occupies 21,008
     net rentable square feet (representing 66% of the net rentable square feet
     at the Property) under a lease scheduled to expire in December 2000 at an
     existing annualized rental rate of $13.50 per square foot. After factoring
     in 1996 projected operating expense recoveries, the annual existing rental
     rate for all tenants at this Property as of September 30, 1996 (excluding
     tenant utilities) was $17.82 per leased square foot.
 
                                   MAIN LINE
 
     The Company owns two Properties in the Main Line submarket. This submarket
contains, as of June 30, 1996, approximately 2.5 million square feet of
commercial office space. As of June 30, 1996, the total vacancy rate was
approximately 8.5%, down from 14.5% at June 30, 1995. Over the 18-month period
ended June 30, 1996, net absorption of office space in this submarket totalled
approximately 150,000 square feet, while leasing activity exceeded 315,000
square feet. The Company's Properties in this submarket are located in the
Newtown Square Corporate Campus.
 
NEWTOWN SQUARE CORPORATE CAMPUS
 
     According to C&W, as of June 30, 1996, there were 21 buildings aggregating
approximately 2.3 million net rentable square feet that are in direct
competition to the Company's Newtown Square Properties. The vacancy rate in
these directly competitive properties was 7.2% as of June 30, 1996. As a result,
vacancy rates in these directly competitive properties compare favorably to the
8.5% vacancy rate in the overall Main Line office submarket area as of June 30,
1996. Rental rates in the directly comparable properties range from $18.00 per
square foot full service (which includes a pro rata share of all costs of
operating the property) to $24.00 per square foot plus tenant electricity. On a
gross rental rate basis, excluding tenant utilities, existing tenants in 16 and
18 Campus Boulevard were paying from $11.49 to $17.60 and from $16.50 to $17.95,
respectively, per leased square foot plus electricity as of September 30, 1996.
 
     16 Campus Boulevard
 
          16 Campus Boulevard is a three story office building completed in
     1990. This Property contains 65,463 net rentable square feet and is
     situated on 14.6 acres. This Property is constructed of structural steel
     framing with a brick exterior. As of September 30, 1996, this Property was
     100% leased to four tenants at an average annualized base rent per leased
     per square foot of $9.43. The largest tenant at this Property, New England
     Mutual Life, occupies 31,907 net rentable square feet under a lease
     scheduled to expire in 2006. 16 Campus Boulevard also is the headquarters
     building of the Company. After factoring in 1996 projected operating
     expense recoveries, the average annual existing rental rate for the
     building as of September 30, 1996 (excluding tenant utilities) was $13.58
     per square foot. A tenant at this Property has a right of first offer to
     purchase this Property during the term of its lease, which is scheduled to
     expire in June 2006.
 
     18 Campus Boulevard
 
          18 Campus Boulevard is a two story office building completed in 1990.
     This Property contains 37,700 net rentable square feet and is situated on
     6.4 acres. This Property is constructed of structural steel framing with a
     brick exterior. This Property is currently 100% leased to tenants at an
     average existing annualized base rent per square foot of $14.62. The major
     tenant at the Property, Devco Mutual, occupies 13,332 net rentable square
     feet under a lease expiring in January 2001, provided, that, Devco may
     terminate the lease at January 1998 with a penalty payment. There are no
     existing leases that are scheduled to expire in 1996. The aggregate net
     rentable square footage of leases expiring in 1997
 
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<PAGE>   32
 
     represent 14.2% of this Property's total net rentable square feet. After
     factoring in 1996 projected operating expense recoveries, the annual
     existing rental rate for this Property as of September 30, 1996 (excluding
     tenant utilities) was $18.62 per leased square foot.
 
                                 LEHIGH VALLEY
 
     The Company owns three Properties in the Lehigh Valley submarket. This
submarket contains approximately 4.4 million square feet of commercial office
space. As of June 30, 1996, total vacancy in this submarket was approximately
11.6% down from 15.4% at June 30, 1995. Over the 18-month period ended June 30,
1996, absorption of office space in this submarket was approximately 37,000
square feet per quarter or 148,000 square feet per year.
 
     In addition to competing in the office market within this submarket,
certain of the Properties compete in the industrial/flex market sector.
According to C&W, as of June 30, 1996 there was an estimated 19.1 million net
rentable square feet of industrial space located in 12 business parks throughout
this market sector. As of June 30, 1996, the vacancy rate in this market sector
was 9.9%. Included in this market sector was an estimated 1.7 million square
feet of flex space as of June 30, 1996. As of that date, the vacancy rate for
flex space was only 14.2%. C&W identified seven flex complexes aggregating
629,000 net rentable square feet that are in direct competition with the
Properties located within this submarket. Such competing properties had an
overall vacancy rate of 5.2% as of June 30, 1996, compared to 36.7% as of June
30, 1995. Average asking rents in these competing properties ranged from $3.75
to $10.50 per square foot.
 
IRON RUN CORPORATE CENTER
 
     The Company owns three Properties in the Iron Run Corporate Center, a 725
acre business park located in Allentown, Pennsylvania. The park contains 37
buildings containing over 3 million net rentable square feet. The Company
developed five buildings in the park totalling over 326,000 net rentable square
feet. Two buildings, aggregating 200,000 net rentable square feet, were
build-to-suit for an end user and a life insurance company. The Company's three
Iron Run Corporate Center buildings aggregate 129,113 net rentable square feet
and are both office and office/flex buildings.
 
     7310 Tilghman Street
 
          7310 Tilghman Street is a one story office building completed in 1985.
     This Property contains 40,000 net rentable square feet and is situated on
     5.2 acres. The structural steel framed building has a brick exterior and an
     interior ceiling height capability of 18 feet. As of September 30, 1996,
     this Property was 99% leased to three tenants at an average annualized
     existing base rent of $8.89 per square foot. The primary tenant is AT&T,
     which occupies 32,774 net rentable square feet under three leases scheduled
     to expire as follows: December 1996 (13,107 net rentable square feet);
     November 1997 (8,667 net rentable square feet); and August 1998 (11,000 net
     rentable square feet).
 
     7248 Tilghman Street
 
          7248 Tilghman Street is a one story office/flex building completed in
     1987. This Property contains 42,863 net rentable square feet and is
     situated on 4.2 acres. As of September 30, 1996, this Property was 94%
     leased to four tenants. The primary tenant is Ohio Casualty, which occupies
     19,877 net rentable square feet under a lease scheduled to expire in July
     2001. After factoring in 1996 projected operating expense recoveries, the
     annual existing rental rate for this Property as of September 30, 1996
     excluding tenant utilities was 14.76 per leased square foot.
 
     According to C&W, these properties compete for office tenants in the Lehigh
Valley area which contains of 4.3 million net rentable square feet and, as of
June 30, 1996, had a total vacancy of 11.6%, down from 15.4% at June 30, 1995.
The average asking rental rate for properties directly competing with the
Properties in this submarket ranges between $8.75 to $13.50 per square foot on a
triple net basis.
 
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     6575 Snowdrift Road
 
          6575 Snowdrift Road is a one story office/flex building completed in
     1989. This Property contains 46,250 net rentable square feet and is
     situated on 6.3 acres. As of September 30, 1996, this Property was 100%
     leased to Corning Packaging under a lease scheduled to expire in February
     1999 at an average annual rental rate of $7.15 per leased square foot.
 
                                    LANSDALE
 
     The Company has a warehouse/distribution facility located in Lansdale,
Pennsylvania, which is located along the Northeast Extension of the Pennsylvania
Turnpike between Plymouth Meeting and Allentown, Pennsylvania. C&W indicated
that, in the four suburban Pennsylvania counties that are adjacent to the City
of Philadelphia, there were an estimated 67.5 million net rentable square feet
of warehouse/distribution space with a vacancy rate of 13.5% as of June 30,
1996. C&W has indicated that the Company's Property in this submarket competes
within the Western Montgomery County area submarket. Within this submarket,
there are approximately 4.5 million net rentable square feet of
warehouse/distribution space with a vacancy rate as of June 30, 1996 of 15.0%.
During the 18-month period ended June 30, 1996, the vacancy rate for warehouse
space in the Western Montgomery County market area was highly variable, with a
rate as low as 11.4% and as high as 16.3%. During such period, leasing activity
amounted to over 700,000 square feet which equated to 120,000 square feet per
quarter.
 
     1510 Gehman Road
 
          1510 Gehman Road is a warehouse/flex building located in northern
     Montgomery County completed in 1990 and situated in a park that contains
     three buildings that were developed by the Company. Two of the buildings
     were build-to-suit for a user and the other facility was sold to an
     institutional investor in 1992. This Property contains 152,625 net rentable
     square feet and is situated on 14.8 acres. This Property is constructed of
     structural steel framing, insulated metal panels and exterior masonry units
     with an interior ceiling height of 24 feet. This Property consists of 65%
     warehouse space and 35% finished space. As of September 30, 1996, this
     Property was 100% leased to two tenants with an average annualized existing
     base rent per leased square foot of $4.72. Nibco, Inc. occupies 98,725 net
     rentable square feet as warehouse space under a lease scheduled to expire
     in August 1999 at an existing rate of $4.00 per net rentable square foot.
     Ford Electronics occupies 53,900 net rentable square feet utilized as
     design space under a lease scheduled to expire in June 1998 at an existing
     rental rate of $6.05 per net rentable square foot. Ford has contractual
     right to acquire the 1510 Gehman Road property provided Ford occupies
     greater than 50% of the building. As of November 7, 1996, Ford occupied 35%
     of the building and the balance was occupied by Nibco, Inc.
 
                   BUCKS COUNTY OFFICE AND INDUSTRIAL MARKET
 
     Eight of the Acquisition Properties are located in the Bucks County Office
and Industrial market. This submarket contains, as of June 30, 1996
approximately 37 million net rentable square feet of industrial space and 2.6
million net rentable square feet of office space. As of June 30, 1996, the
vacancy rate in this submarket was approximately 16.8% for industrial properties
and 12.8% for office properties, down from 18.4% at January 1, 1996.
 
     As of June 30, 1996, the average rental rate for Class A office space was
$18.95 (full service), per net rentable square foot. Office leasing activity
during the past few years has averaged approximately 150,000 to 200,000 net
rentable square feet per year while net absorption of office space has averaged
approximately 75,000 to 200,000 net rentable square feet per year.
 
     The average rental rate for industrial space in this submarket was $3.37
per square foot for the six-month period ended June 30, 1996, but varies between
$3.00 to $5.00 per net rentable square foot depending on tenant size, percentage
of office and special finishes. The average rental rate for office/flex space
was $6.45 per net rentable square foot for the six month period ended June 30,
1996 but was between $6.00 and $10.00 per net rentable square foot depending on
tenant size, percentage of office and special finishes. Leasing activity
 
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in this submarket during the six month period ended June 30, 1996 was
approximately 353,000 net rentable square feet.
 
     2200 Cabot Boulevard (an Acquisition Property)
 
          2200 Cabot Boulevard is a one story industrial building completed in
     1979. This Property contains 55,081 net rentable square feet and is
     situated on 3.98 acres. This Property is constructed of structural steel
     framing with a brick and glass exterior. As of September 30, 1996, this
     Property was 100% leased to three tenants with an average annualized
     existing base rent of $4.40 per square foot. The largest tenants in this
     Property are Hussman and Noble Printing, occupying 21,000 and 20,700 square
     feet, respectively, with leases scheduled to expire in March 1999 and May
     1997, respectively, provided, that, Hussman may terminate the lease at
     September 1997 with a penalty payment.
 
     2250 Cabot Boulevard (an Acquisition Property)
 
          2250 Cabot Boulevard is a one story industrial building completed in
     1982. This Property contains 40,000 net rentable square feet and is
     situated on 3.3 acres. This Property is constructed of structural steel
     framing with a brick and glass exterior. As of September 30, 1996, this
     Property was 100% leased to one tenant with an average annualized existing
     base rent of $3.50 per square foot. This tenant, Bucks County Nut, occupies
     40,000 square feet under a lease scheduled to expire in July 1999.
 
     2260/2270 Cabot Boulevard (Acquisition Properties)
 
          2260/2270 Cabot Boulevard consists of two one story office/flex
     buildings completed in 1984. This Property contains an aggregate of 29,638
     net rentable square feet and is situated on 2.1 acres. This Property is
     constructed of structural steel framing with a brick and glass exterior. As
     of September 30, 1996, this Property was 100% leased to 12 tenants with an
     average annualized existing base rent of $8.54 per square foot. The largest
     tenant in this Property, Sager Electrical, occupies 4,238 square feet under
     a lease scheduled to expire in October 1998.
 
     3000 Cabot Boulevard (an Acquisition Property)
 
          3000 Cabot Boulevard is a one story office building completed in 1986.
     This Property contains 34,640 net rentable square feet and is situated on
     4.9 acres. This Property is constructed of structural steel framing with a
     brick and glass exterior. As of September 30, 1996, this Property was 83.8%
     leased to six tenants with an average annualized existing base rent of
     $17.03 per square foot. The largest tenant in this Property, Geraghty
     Miller, occupies 10,840 square feet under a lease scheduled to expire in
     November 1997.
 
     3333, 3331, 3329 Street Road -- Greenwood Square (Acquisition Properties)
 
          The Greenwood Square Property consists of three multi-story office
     buildings completed from 1985 through 1988. 3333 Street Road is a three
     story office building, containing 60,408 net rentable square feet situated
     on 3.4 acres; 3331 Street Road is a four story office building, containing
     80,521 net rentable square feet situated on 4.5 acres; and 3329 Street Road
     is a two story office building, containing 25,000 net rentable square feet
     situated on 1.5 acres. All three buildings are constructed of structural
     steel with brick and glass exteriors. As of September 30, 1996 this
     Property was 92.1% leased to 30 tenants with an average annualized existing
     gross rent of $16.54 per square foot. The largest tenant in this Property,
     Waste Management, occupies 45,764 net rentable square feet under a lease
     scheduled to expire in March 1997.
 
                      KING OF PRUSSIA/VALLEY FORGE MARKET
 
     The Company is acquiring one building in the King of Prussia/Valley Forge
market. As of June 30, 1996, this submarket contained approximately 9.3 million
square feet of office space. As of June 30, 1996, vacancy in this submarket was
approximately 10.8%, down from 17.6% at June 30, 1995. Leasing activity in this
 
                                       96
<PAGE>   35
 
submarket for the six months ended June 30, 1996 was 586,438 net rentable square
feet. Absorption in this submarket for the six months ended June 30, 1996 was
939,237 net rentable square feet compared to 167,504 net rentable square feet
for the comparable period during 1995.
 
     500 North Gulph Road (an Acquisition Property)
 
          500 North Gulph Road is a five story office building completed in
     1979. This Property contains 92,851 net rentable square feet and is
     situated on 5.3 acres. This Property is constructed of structural steel
     framing with a pre-cast concrete exterior. As of September 30, 1996, this
     Property was 86.1% leased to 13 tenants with an average annualized existing
     gross rent of $16.51 per square foot. The largest tenants in this Property
     are Strohl Systems and Transition Software, which are related companies and
     occupy 26,378 net rentable square feet under two separate leases scheduled
     to expire in October 1999 and September 2000.
 
                              SOUTHERN NEW JERSEY
 
     The Southern New Jersey market is divided into two principal submarket
areas: Burlington County and Camden County.
 
BURLINGTON COUNTY SUBMARKET
 
     The Company owns three Initial Properties and will acquire one Property in
Burlington County. This submarket contains approximately 4.6 million net
rentable square feet of commercial office space. As of June 30, 1996, total
office vacancy was 19.3% down from 21.2% as of June 30, 1995 in this submarket.
However, the vacancy rate of Class A space as of June 30, 1996 was 12.6%
compared to the market average of 19.3%. Leasing activity within the Burlington
County market was approximately 93,000 square feet per quarter or 371,000 square
feet per annum during the 18-month period ended June 30, 1996.
 
     One Greentree Centre
 
          One Greentree Centre is a three story midrise office building
     completed in 1982. This Property contains 55,838 net rentable square feet
     and is situated on 4.2 acres. This Property is constructed of structural
     steel framing with a brick exterior. The lobby in this Property was
     renovated in 1996. As of September 30, 1996, this Property was 100% leased
     to fourteen tenants at an average annualized base rent per leased square
     foot of $16.07 full service. The largest tenant in this Property is
     American Executive Centers, which occupies 16,853 square feet under a lease
     scheduled to expire in January, 2006. Aggregate square footage of leases
     scheduled to expire in 1996, 1997 and 1998 represent 7%, 28% and 9% of this
     Property's total net rentable square footage.
 
     Two Greentree Centre
 
          Two Greentree Centre is a three story midrise office building
     completed in 1983. This Property contains 56,075 net rentable square feet
     and is situated on 4.2 acres. This Property is a sister building to One
     Greentree Center and is constructed of structural steel framing with a
     brick exterior. The lobby was renovated in 1996. As of September 30, 1996,
     this Property was 100% leased to eleven tenants at an average annualized
     base rent per lease square foot of $16.02 full service. The largest tenant
     in this Property is Merrill, Lynch, Pierce, Fenner and Smith, which
     occupies 12,672 net rentable square feet under a lease scheduled to expire
     in November 2005. Aggregate square footage of leases scheduled to expire in
     1996, 1997 and 1998 represent 0%, 30%, and 5%, respectively, of this
     Property's total net rentable square feet.
 
     Three Greentree Centre
 
          Three Greentree Centre is a four story midrise office building
     completed in 1984. This Property contains 69,101 net rentable square feet
     and is situated on 5.4 acres. This Property is constructed of structural
     steel framing with a brick and dryvit exterior. The two story lobby was
     renovated in 1996. As of
 
                                       97
<PAGE>   36
 
     September 30, 1996, this Property was 96% leased to eight tenants at an
     average annualized base rent per lease square foot of $16.41 full service.
     The largest tenant at the Property is Parker, McKay, Criscuolo &
     Associates, a regional law firm, which occupies 25,905 net rentable square
     feet under a lease scheduled to expire in May 2001. Aggregate square
     footage of leases scheduled to expire in 1996, 1997 and 1998 represent 0%,
     25% and 0%, respectively, of this Property's total net rentable square
     feet.
 
     8000 Lincoln Drive (an Acquisition Property)
 
          8000 Lincoln Drive is a five story office building completed in 1983.
     This Property contains 54,923 net rentable square feet and is situated on
     7.5 acres. This Property is constructed of structural steel framing with a
     pre-cast concrete exterior. As of September 30, 1996, this Property was
     100% leased for occupancy by January 1997 to two tenants with an average
     annualized existing base rent of $17.13 per square foot. The largest tenant
     in this Property will be Computer Science Corp. occupying 36,830 net
     rentable square feet under a lease scheduled to expire in November 2001,
     provided that, Computer Science may terminate the lease at November 1999
     with a penalty payment.
 
     C&W identified 15 office buildings aggregating approximately 1.3 million
net rentable square feet that, as of June 30, 1996, compete directly with the
Greentree Centre Properties. As of June 30, 1996, these competing properties
were approximately 22% vacant, with rental rates ranging from $19.50 to $22.00,
per square foot for leases with full operating expenses included.
 
CAMDEN COUNTY SUBMARKET
 
     The Company owns one Property in Camden County. This submarket contains
approximately 4.8 million net rentable square feet of commercial office space.
At June 30, 1996, the vacancy rate was approximately 20%. This high vacancy rate
is primarily attributable to vacancy rates of 18.4% and 21% on Class B and Class
C space, respectively. At June 30, 1996, the vacancy rate for Class A office
space was 9.0%. While there has been negative absorption in this submarket in
the 18-month period ended June 30, 1996, C&W has reported that during the
three-month period ended June 30, 1996, absorption has been a positive 112,572
square feet. In addition, during the 18-month period ended June 30, 1996,
leasing activity in this submarket has approximated 70,000 square feet per
quarter or 280,000 square feet annually.
 
     457 Haddonfield Road
 
          457 Haddonfield Road (known as the LibertyView Building) is a seven
     story midrise office building completed in 1990. This Property contains
     121,737 net rentable square feet and is situated on approximately 7 acres.
     This Property features a structural steel framing, reinforced concrete
     footings with an exterior of precast panels with reflective glass. Key
     features in this Property include a two story marble lobby, working
     balconies on the upper floors, permanent neon lighting and dramatic views
     of Center City Philadelphia. As of September 30, 1996, this Property was
     83% leased to twelve tenants at an average annualized existing rental rate
     of $18.63 per square foot. The largest tenant of this Property is HIP
     Health of N.J., which occupies 37,515 net rentable square feet under a
     lease scheduled to expire in December 2007.
 
                          NORTHERN SUBURBAN WILMINGTON
 
     New Castle County Delaware
 
          The Company is acquiring one building in the Northern Suburban
     Wilmington submarket. As of June 30, 1996 the subtotal market contained
     approximately 3.0 net rentable million square feet of commercial office
     space, with a vacancy rate of 12.6% which is down from 15.7% at June 30,
     1995. C&W has identified eleven Class A Buildings aggregating approximately
     1.2 million net rentable square feet which are directly competitive with
     the Company's Property in this submarket. As of June 30, 1996, vacancy in
     the competitive submarket product was approximately 3.7%. The average
     rental rate for comparable properties in the submarket for Class A space is
     $20.50 per net rentable square foot. Leasing
 
                                       98
<PAGE>   37
 
     activity in the submarket during the eighteen months period ended June 30,
     1996 has averaged 544,000 net rentable square feet on an annualized basis,
     while annual net absorption of office space has averaged approximately
     350,000 net rentable square feet.
 
     One Righter Parkway -- Delaware Corporate Center I  (an Acquisition
Property)
 
          Delaware Corporate Center I is a three story office building completed
     in 1989. This Property contains 104,828 net rentable square feet and is
     situated on 3 acres. This Property is constructed of structural steel
     framing and precast concrete exterior. As of September 30, 1996, this
     Property was 100% leased to six tenants with an average annualized existing
     base rent of $19.30 per square foot. The largest tenant in this Property,
     Kimberly Clark, occupies 93,014 net rentable square feet under a lease
     scheduled to expire in December 2005. Delaware Corporate Center I is a
     ground leased property. See "-- Ground Lease." Fee ownership is held by
     Woodlawn Trustees, Incorporated, and the ground lessee's interest will be
     acquired by the Operating Partnership from the seller. Fifty-one years
     remain on the original term of the ground lease and the ground lessee has
     the option to extend the term for two consecutive ten-year terms. The
     ground lessee holds a right of first refusal to acquire the fee interest in
     the property. The property is ground leased on a triple-net basis, with the
     ground lessee assuming all carrying charges respecting the property, in
     addition to payment of base rent.
 
                                 OTHER MARKETS
 
     168 Franklin Corner Road
 
          168 Franklin Corner Road is located in Lawrenceville, Mercer County,
     New Jersey and was completed in 1976. This Property contains 32,000 net
     rentable square feet. As of September 30, 1996, this Property was 55%
     leased to six tenants at an average annualized existing rental rate of
     $12.31 per leased square foot.
 
     Twin Forks Office Park
 
          Twin Forks Office Park is located in Raleigh, North Carolina. This
     Property was completed in 1982 and contains 73,339 net rentable square
     feet. As of September 30, 1996 this Property was 100% leased to 46 tenants
     at an average annualized existing rental rate of $14.25 per leased square
     foot. The primary tenant in this Property is GE Mortgage, occupying 19,373
     square feet (26% of the total net rentable square feet at the Property)
     under a lease that expired in October 1996. GE Mortgage has announced its
     intention to vacate and to relocate its Raleigh operations to Cherry Hill,
     NJ. Since this announcement the Company has actively been marketing this
     space and, as of September 30, 1996, has re-leased 8,801 of the total
     19,373 square feet to three tenants at an annualized existing rental rate
     of $15.25 per square foot.
 
COMPETITION
 
     The Company competes with other owners and developers that have greater
resources and more experience than the Company. Within the Suburban Philadelphia
Office and Industrial Market, the Company's office and industrial Properties
compete generally with properties owned by other real estate developers and
institutions principally on the basis of price, property quality and location,
especially proximity to major area highways, suburban residential areas, and
access to the central Philadelphia business district and the northeast corridor
business communities of New York, Baltimore and Washington. The Company's
industrial Properties compete principally with buildings owned by other local
developers largely on the basis of services provided and access to
transportation, both highway and rail, and access to Northeast corridor and
national markets.
 
ENVIRONMENTAL MATTERS
 
     Under various Federal, state and local laws, ordinances and regulations, a
current or previous owner or operator of real property may be liable for the
costs of removal or remediation of certain hazardous or toxic
 
                                       99
<PAGE>   38
 
substances on, in or under such property. Such laws often impose such liability
without regard to whether the owner or operator knew of, or was responsible for,
the presence of such hazardous or toxic substances. The costs of remediation or
removal of such substances may be substantial, and the presence of such
substances, or the failure to promptly remediate such substances, may adversely
affect the owner's or operator's ability to sell or rent such property or to
borrow using such property as collateral. Persons who arrange for the disposal
or treatment of hazardous or toxic wastes may be liable for the costs of removal
or remediation of such wastes at the disposal or treatment facility, regardless
of whether such facility is owned or operated by such person. Certain other
federal, state and local laws, ordinances and regulations may impose liability
on an owner of real property where on-site contamination discharges into waters
of the state, including groundwater, or otherwise affects the beneficial use of
such waters. Other federal, state and local laws, ordinances and regulations
require abatement or removal of certain asbestos-containing materials in the
event of demolition or certain renovations or remodeling and also govern
emissions of asbestos fibers in the air. The operation and subsequent removal of
certain underground storage tanks are also regulated by federal, state and local
laws, ordinances and regulations. In connection with its ownership and operation
of the Properties, the Company could be held liable for the costs of remedial
action with respect to contamination, asbestos-containing materials or tanks or
related claims.
 
     All of the Properties have been subjected to either Phase I environmental
site assessments, or updates of earlier assessments, performed by independent
third parties. Phase I environmental site assessments are intended to evaluate
the environmental condition of, and potential environmental liabilities
associated with, the Property and include a site visit and review of public and
historical records, but involve no soil or groundwater sampling or subsurface
investigation. Such assessments generally consist of an investigation of
environmental conditions of the Properties, including a preliminary
investigation of the Properties and identification of publicly known conditions
concerning properties in the vicinity of the Properties, an investigation as to
the presence of polychlorinated biphenyls and aboveground and underground
storage tanks at the Properties and the preparation and issuance of written
reports. The primary focus of the recent Phase I environmental site assessments
and updates of earlier assessments conducted on the Properties was to identify
any "recognized environmental conditions." These are conditions arising from the
presence or likely presence of hazardous substances or petroleum products that
would present a risk of harm to the public health or environment or that would
be the subject of an enforcement action if brought to the attention of
appropriate governmental agencies, or of third party actions.
 
     Except as discussed below with respect to the Whitelands Property, the
environmental site assessments have not revealed any significant environmental
liability, nor is the Company aware of any environmental liability with respect
to the Properties that the Company's management believes would have a material
adverse effect on the Company. An environmental assessment has identified
environmental contamination of potential concern with respect to the Whitelands
Property (110 Summit Drive). Petroleum products, solvents and heavy metals were
detected in the groundwater. These contaminants are believed to be associated
with debris deposited by others in a quarry formerly located on the Whitelands
Property. The quarry previously appeared on the Comprehensive Environmental
Response Compensation and Liability Information System List, a list maintained
by the United States Environmental Protection Agency (the "EPA") of abandoned,
inactive or uncontrolled hazardous waste sites which may require cleanup. The
EPA conducted a preliminary assessment in 1984 with the result that no further
action was taken. Subsequently, the quarry was removed from the list. While the
Company believes it is unlikely that the Operating Partnership will be required
to undertake remedial action with respect to such contamination, there can be no
assurance in this regard. If the Operating Partnership were required to
undertake remedial action on the Whitelands Property, it has been indemnified
against the cost of such remediation by the seller, SSI, subject to a maximum of
$2,018,000. The term of SSI's indemnity agreement expires on August 22, 2001. If
SSI is unable to fulfill its obligations under its indemnity agreement or if the
Operating Partnership is required to undertake remedial action after the
expiration of the five-year term of the agreement, the costs of such remediation
could be substantial. Because the Company does not believe that any remediation
at the Whitelands Property is probable, no amounts have been accrued for any
such potential liability.
 
                                       100
<PAGE>   39
 
     No assurance can be given that existing environmental studies with respect
to the Properties reveal all environmental liabilities or that any prior owner
of any such property did not create any material environmental condition not
know to the Company. Moreover, no assurance can be given that: (i) future laws,
ordinances or regulations will not impose any material environmental liability
or (ii) the current environmental condition of the Properties will not be
affected by tenants and occupants of the Properties, by the condition of
properties in the vicinity of the Properties (such as the presence of
underground storage tanks) or by third parties unrelated to the Company.
 
GROUND LEASE
 
     Delaware Corporate Center I (an Acquisition Property) is a ground leased
property. Fee ownership is held by Woodlawn Trustees, Incorporated, and the
ground lessee's interest will be acquired by the Operating Partnership from the
seller. Fifty-one years remain on the original term of the ground lease and the
ground lessee has the option to extend the term for two consecutive ten-year
terms. The ground lessee holds a right of first refusal to acquire the fee
interest in the property. The property is ground leased on a triple-net basis,
with the ground lessee assuming all carrying charges respecting the property, in
addition to payment of base rent which is approximately $109,000 per annum,
subject to certain periodic adjustments.
 
INSURANCE
 
     The Operating Partnership carries comprehensive liability, fire, extended
coverage and rental loss insurance covering all of the Properties, with policy
specifications and insured limits which the Company believes are adequate and
appropriate under the circumstances. There are, however, certain types of losses
that are not generally insured because they are either uninsurable or not
economically feasible to insure. Should an uninsured loss or a loss in excess of
insured limits occur, the Company could lose its capital invested in the
Property, as well as the anticipated future revenues from the Property and, in
the case of debt which is with recourse to the Company, would remain obligated
for any mortgage debt or other financial obligations related to the Property.
Any such loss would adversely affect the Company. Moreover, the Company will
generally be liable for any unsatisfied obligations other than non-recourse
obligations. Company management believes that the Properties are adequately
insured. No assurance can be given that material losses in excess of insurance
proceeds will not occur in the future.
 
CERTAIN PROPERTY TAX INFORMATION
 
     The aggregate real estate property tax obligations paid by the Company
(with or without tenant reimbursement) for calendar 1995 were approximately
$391,000. The aggregate real estate property tax obligations paid by SSI and TNC
(with or without tenant reimbursement) for calendar 1995 with respect to the
SSI/TNC Properties were approximately $968,000. These amounts do not include
real estate property taxes paid directly by tenants. On a pro forma basis, more
than 95.3% of the aggregate annualized base rent at the Properties as of
September 30, 1996 is generated by leases which contain provisions requiring
tenants to pay as additional rent their proportionate share of any real estate
taxes or increases in real estate taxes over base amounts.
 
EMPLOYEES
 
     As of September 30, 1996, the Company employed 26 persons, including four
executive officers.
 
LEGAL PROCEEDINGS
 
     The Company is not currently involved in any material litigation nor, to
the Company's knowledge, is any material litigation currently threatened against
the Company, other than routine litigation arising in the ordinary course of
business, substantially all of which is expected to be covered by liability
insurance.
 
MORTGAGE DEBT AND CREDIT FACILITY
 
     Mortgage Indebtedness
 
     The following table sets forth the Company's mortgage indebtedness that
will remain outstanding after the closing of the Offering and the Concurrent
Investments and the application of the use of proceeds therefrom. In addition to
mortgage indebtedness listed below, the Credit Facility is expected to be
secured by
 
                                       101
<PAGE>   40
 
cross-collateralized mortgages and assignments and rents on all Properties,
except for those set forth in the table below.
 
<TABLE>
<CAPTION>
                                        PROPERTIES -- INDEBTEDNESS
                                          (DOLLARS IN THOUSANDS)
                             PRINCIPAL BALANCE         INTEREST
                                   AS OF               RATE AT         ANNUAL DEBT   MATURITY    PREPAYMENT
     PROPERTY/LOCATION       SEPTEMBER 30, 1996   SEPTEMBER 30, 1996   SERVICE(1)      DATE       PREMIUMS
- ---------------------------  ------------------   ------------------   -----------   ---------   ----------
<S>                          <C>                  <C>                  <C>           <C>         <C>
Horsham Business Center
Horsham, PA
  650 Dresher Road(2)......       $  2,500               8.00%           $   237        8/1998      None
                                                                                                   After
                                                                                                   2/1/97
Oaklands Corporate Center
Exton, PA
  486 Thomas Jones Way(3)..
  468 Creamery Way(3)......          6,427               8.00%               638        2/1998      None
Whitelands Business Park
Exton, PA
  110 Summit Drive(4)......          1,583               9.25%               220        4/1997      None
Iron Run Industrial Park
Allentown, PA
  7310 Tilghman Street.....          2,533               9.25%               274        3/2000      (9)
  6575 Snowdrift Road......          2,348               8.00%               230        2/1998      None
Greentree Centre
Marlton, New Jersey
  One Greentree
     Centre(5)(6)
  Two Greentree
     Centre(5)(6)
  Three Greentree
     Centre(5)(6)                    6,147               9.00%               628        4/2001      (10)
LibertyView
Cherry Hill, NJ
  457 Haddonfield
     Road(7)(8)............           8,461               8.00%              339        1/1999      (11)
                                        910               8.00%                0       12/1997
                                                                                                    None
Twin Forks Office Park
Raleigh, NC
  5910-6090 Six Forks(6)...       $   2,704               9.00%          $   276        4/2001      (12)
                                  ---------                              -------             
TOTAL MORTGAGE
  INDEBTEDNESS.............       $  33,613                              $ 2,842
                                  =========                              =======
</TABLE>

- ---------------
 (1) "Annual Debt Service" is calculated for the twelve-month period ending
     December 31, 1996. For loans that bear interest at a variable rate, the
     rates in effect at September 30, 1996 have been assumed to remain constant
     for the balance of 1996.
 
 (2) On July 31, 1996, this loan was refinanced by paying the former mortgage
     lender $2.4 million in full satisfaction thereof with the partial proceeds
     of a new loan from GMAC in the principal amount of $2.5 million. The new
     mortgage loan matures on August 1, 1998, bears interest at a variable rate
     equal to LIBOR plus 250 basis points and provides for principal
     amortization of $4,000 per month during the period September 1, 1997
     through July 1, 1998.
 
 (3) Both of these properties secure a single loan.
 
 (4) Interest rate is variable and equal to the prime rate plus 1.0%.
 
                                       102
<PAGE>   41
 
 (5) These properties secure two loans payable to a single lender. The interest
     rate was fixed at 9.0% through October 15, 1996 and is currently fixed at
     9.31% through April 15, 1998. After April 15, 1998, the interest rate is
     reset based upon the mortgage lender's evaluation of such factors as
     financial performance and projected risk of the Properties securing such
     loan. The mortgage loans are due on April 15, 2001, and the lender has the
     right to call the loans at par on April 15, 1998.
 
 (6) The Company has made an application to the lender that, if accepted, would
     result in (i) an increase in the principal amount of the Greentree Centre
     loan to $7.3 million and the Twin Forks loan to $2.7 million, (ii) a fixed
     interest rate of 7.6%, (iii) a maturity date of 5 years from closing, and
     (iv) a 20-year amortization of principal.
 
 (7) The $8,461,000 debt was incurred as a result of the acquisition of the
     Property on July 19, 1996 and the amount of debt service reflects debt
     service from July 19, 1996 through December 31, 1996. Pursuant to the terms
     of this loan, the Company has the right to borrow up to approximately $1.4
     million to fund tenant improvements and leasing commissions.
 
 (8) The $910,000 of debt was incurred as a result of the acquisition of the
     Property on July 19, 1996. The mortgage note payable is in the principal
     amount of $1.0 million, is due in December 1997 and does not bear interest.
     The Company recorded a $104,000 adjustment to the purchase price and a
     corresponding reduction in debt to reflect the fair value of the note
     payable to the seller and will accrue interest expense to the date of
     maturity.
 
 (9) Four percent through December 31, 1996, which prepayment penalty is reduced
     by 1% for each subsequent year through 1999.
 
(10) This loan may not be prepaid unless the Twin Forks loan is also prepaid.
     The prepayment penalty equals greater of 1% of principal amount prepaid or
     a yield maintenance premium.
 
(11) One percent of any portion of the original acquisition portion of the loan
     being prepaid.
 
(12) This loan may be prepaid without prepayment of the loan secured by One
     Greentree Centre, Two Greentree Centre and Three Greentree Centre, provided
     certain loan-to-value ratios and coverage tests with regard to the
     Greentree Centre loan are satisfied and upon payment of a premium equal to
     the greater of 1% of the principal amount prepaid or a yield maintenance
     premium.
 
CREDIT FACILITY
 
     The Company and Operating Partnership have obtained a commitment from Smith
Barney Mortgage Capital Group, Inc. and NationsBank, N.A. for a two year, $80
million secured revolving Credit Facility. The Credit Facility will be used to
refinance existing indebtedness, fund acquisitions and new development projects,
and for general working capital purposes, including capital expenditures and
tenant improvements. The amount available to be borrowed under the Credit
Facility will be reduced by the amount of the letters of credit issued by the
lenders for as long as such letters of credit are outstanding. The Credit
Facility will be recourse to the Company and the Operating Partnership and will
be secured by, among other items, cross-collateralized and cross-defaulted first
mortgage liens on approximately 25 Properties, owned directly or indirectly by
the Company, the Operating Partnership or their representative subsidiaries.
 
     The Credit Facility will bear interest at a per annum floating rate equal
to the 30, 60, or 90-day LIBOR, plus 175 basis points. The Credit Facility will
require monthly payments of interest only, with all outstanding advances and all
accrued but unpaid interest due 2 years from the closing of the Credit Facility.
A fee equal to 0.75% of the maximum amount available under the Credit Facility
will be paid to the lenders in respect of the Credit Facility at closing. In
addition, a fee of 0.25% per annum (0.125% per annum until 4/1/97) on the unused
amount of the Credit Facility will be payable quarterly in arrears. An annual
fee in the amount of $35,000 will be payable annually in advance to NationsBank,
N.A. as compensation for administration of the Credit Facility. The Credit
Facility will carry minimum debt service coverage, fixed charge,
debt-to-tangible net worth ratios and other financial covenants and tests, and
will require payment of prepayment premiums in certain instances.
 
                                       103
<PAGE>   42
 
     Closing of the Credit Facility is subject to satisfactory completion of
this Offering, the negotiation and execution of a definitive Credit Facility
agreement and related documentation, and other customary closing conditions.
 
OPTION PROPERTIES
 
     At the closing of the SSI/TNC Transaction, the Operating Partnership
acquired an option from an affiliate of TNC (C/N Horsham Towne Limited
Partnership) entitling the Company to acquire, at its discretion, the four
Option Properties at any time during the two-year period ending August 22, 1998
(subject to two extensions of one year each). The Operating Partnership may not
exercise its option for less than all of the Option Properties. The parties have
agreed that the purchase price payable by the Operating Partnership upon
exercise of its option will consist of $10.00 in excess of the mortgage debt
encumbering the Option Properties at the time of exercise (which, as of
September 30, 1996, aggregated $21.0 million, including approximately $4.2
million of accrued debt and unpaid interest). The right of the Operating
Partnership to exercise its option to acquire the Option Properties is
conditioned on receipt of consent of the mortgage lender for the Option
Properties. As of the date hereof, no lender consent has been requested, and no
determination to seek any such consent has been made. There can be no assurance
that any of the Option Properties will be acquired.
 
     The following table summarizes certain information with respect to the
Option Properties:
<TABLE>
<CAPTION>
                                                                                                          AVERAGE TOTAL
                                                                                      TOTAL                 BASE RENT
                                                                PERCENTAGE          BASE RENT             PLUS EXPENSE
                                                               LEASED AS OF      FOR THE TWELVE          RECOVERIES PER
                                                     NET        SEPTEMBER         MONTHS ENDED           RENTABLE SQUARE
                                         YEAR     RENTABLE         30,         SEPTEMBER 30, 1996        FOOT LEASED AT
           PROPERTY/LOCATION             BUILT   SQUARE FEET     1996(1)           (000'S)(2)         SEPTEMBER 30, 1996(3)
- ---------------------------------------- -----   -----------   ------------   ---------------------   ---------------------
<S>                                      <C>     <C>           <C>            <C>                     <C>
HORSHAM BUSINESS CENTER HORSHAM, PA
  255 Business Center Drive.............  1987      50,616          100%             $   524                 $ 14.60
  355 Business Center Drive.............  1987      26,637           88%                 139                    8.48
  455 Business Center Drive.............  1988      51,505           94%                 420                   11.97
  555 Business Center Drive.............  1988      30,122           99%                 340                   16.26
                                                   -------                           -------
                                                   158,880                           $ 1,423
                                                   =======                           =======
 
<CAPTION>
                                           TENANTS LEASING 10% OR MORE
                                          OF RENTABLE SQUARE FOOTAGE PER
                                           PROPERTY AS OF SEPTEMBER 30,
           PROPERTY/LOCATION              1996 AND LEASE EXPIRATION DATE
- ----------------------------------------  ------------------------------
<S>                                      <<C>
HORSHAM BUSINESS CENTER HORSHAM, PA
  255 Business Center Drive.............  Stroehmann (38%) - 6/99;
                                          Great Expectations
                                          (23%) - 3/97;
                                          GMAC (13%) - 9/97-9/01;
                                          Buckman Van Buren (21%) - 2/97
  355 Business Center Drive.............  Anthem Electronic
                                          (34%) - 9/01;
                                          Seimens Printing Sys.
                                          (22%) - 8/98;
                                          GE Capital (16%) - 9/01
  455 Business Center Drive.............  Astea (65%) - 10/02;
                                          Letven/Diccicco (29%) - 7/00
  555 Business Center Drive.............  GMAC (77%) - 9/99;
                                          First American Home Care
                                          (13%) - 4/00
</TABLE>
 
- ---------------
(1) Based on all leases dated on or before September 30, 1996.
 
(2) "Total Base Rent" for the twelve months ended June 30, 1996 represents base
    rents excluding tenant reimbursements calculated in accordance with
    generally accepted accounting principles determined on a straight-line
    basis. Tenant reimbursements generally include payment of real estate taxes,
    operating expenses and escalations and common area maintenance and utility
    charges.
 
(3) Represents Total Base Rent for the twelve months ended September 30, 1996,
    plus tenant reimbursements for the twelve months ended September 30, 1996,
    divided by net rentable square feet leased.
 
                                       104
<PAGE>   43
 
                   AGGREGATE TAX BASIS -- INITIAL PROPERTIES
 
     The following table sets forth the aggregate tax basis of the Initial
Properties as of December 31, 1995 for federal income tax purposes:
 
<TABLE>
<CAPTION>
                                                               31.5       19
                     AGGREGATE            40 YEAR   39 YEAR    YEAR      YEAR       19 YEAR         18 YEAR      7 YEAR    5 YEAR
SUBMARKET/PROPERTY   TAX BASIS    LAND    MACRS(1)  MACRS(1)  MACRS(1)  ACRS(2)  STRAIGHT-LINE   STRAIGHT-LINE   MACRS(3)  ACRS(2)
- -------------------  ---------   ------   -------   -------   -------   ------   -------------   -------------   -------   ------
                                                                    (IN THOUSANDS)
<S>                  <C>         <C>      <C>       <C>       <C>       <C>      <C>             <C>             <C>       <C>
HORSHAM/WILLOW
 GROVE/JENKINTOWN,
 PA
  650 Dresher
    Road...........   $ 2,702    $  413       --        --        --    $1,158           --         $   967       $ 120     $ 44
  1155 Business
    Center Drive...     5,434       943       --    $4,491        --       --            --              --          --       --
  500 Enterprise
    Road...........     4,981       814       --     4,167        --       --            --              --          --       --
  One Progress
    Avenue.........     3,687       803       --     2,884        --       --            --              --          --       --
SOUTHERN ROUTE 202
  CORRIDOR, PA
  456 Creamery
    Way............     1,865       311       --     1,554        --       --            --              --          --       --
  486 Thomas Jones
    Way............     4,607       467       --       322    $3,818       --            --              --          --       --
  468 Creamery
    Way............     2,370       253       --       118     1,999       --            --              --          --       --
WHITELANDS BUSINESS
  PARK
  110 Summit
    Drive..........     2,727       343       --        --       183      888         1,039              --         265        9
BLUE BELL/PLYMOUTH
  MEETING/FORT
  WASHINGTON, PA
  2240/50 Butler
    Pike...........     4,995       448       --        --       275      903            --           2,693         548      128
  120 West
    Germantown
    Pike...........     3,558       379       --        --        97    2,794            --              --         283        5
  140 West
    Germantown
    Pike...........     2,867       318       --        --       509    1,723            --              --         292       25
  2260 Butler
    Pike...........     3,023       381       --        --       496    1,962            --              --         159       25
MAIN LINE, PA
  16 Campus
    Boulevard......     6,178     1,082       --     5,096        --       --            --              --          --       --
  18 Campus
    Boulevard......     3,414       692       --     2,722        --       --            --              --          --       --
LEHIGH VALLEY, PA
  7310 Tilghman
    Street.........     2,789       213       --        --       414      804           897              --         437       24
  7248 Tilghman
    Street.........     2,519       371       --        --     2,148       --            --              --          --       --
  6575 Snowdrift
    Road...........     3,184       245       --       245     2,694       --            --              --          --       --
  1510 Gehman
    Road...........     4,998       526       --     4,472        --       --            --              --          --       --
BURLINGTON COUNTY,
  NJ
  One Greentree
    Centre.........     7,436       751      401        --       617    5,667            --              --          --       --
  Two Greentree
    Centre.........     8,030       744      897        --       594    5,795            --              --          --       --
  Three Greentree
    Centre.........    10,170       987    1,134        --       423    7,626            --              --          --       --
CAMDEN COUNTY, NJ
  457 Haddonfield
    Road(4)........         0        --       --        --        --       --            --              --          --       --
OTHER MARKETS
  168 Franklin
    Corner Road,
    Lawrenceville,
    NJ.............     3,199       481       --     2,718        --       --            --              --          --       --
Twin Forks Office
  Park
  5910-6090 Six
    Forks
  Raleigh, NC......     7,779     2,487      961        --       537    3,794            --              --          --       --
</TABLE>
 
- ---------------
(1) Modified accelerated cost recovery system -- straight line.
(2) Accelerated cost recovery system.
(3) Modified accelerated cost recovery system -- accelerated.
(4) Acquired in July 1996.
 
                                       105
<PAGE>   44
 
C&W MID-YEAR REPORT AND C&W MARKET ANALYSES
 
     The C&W Market Analyses were prepared for the Company by Cushman &
Wakefield of Pennsylvania, Inc., which is a real estate service firm with
significant experience and expertise relating to the Suburban Philadelphia
Office and Industrial Market and the various submarkets therein. The information
in the C&W Mid-Year Report and C&W Market Analyses reflect data available at
June 30, 1996 and August 1, 1996, respectively, and do not reflect data or
changes subsequent to those dates. The information contained in the C&W Mid-Year
Report and C&W Market Analyses have been gathered by C&W from sources assumed to
be reliable, including publicly available records. Because records of all
transactions are not readily available, the information contained in the C&W
Mid-Year Report and C&W Market Analyses may not reflect all transactions
occurring in the geographic area discussed in the C&W Mid-Year Report and C&W
Market Analyses. In addition, transactions that are reported may not be
described accurately or completely in the publicly available records. C&W shall
not be responsible for and does not warrant the accuracy or completeness of any
such information derived from such publicly available records (or information
relating to transactions that were not reported).
 
     In connection with the C&W Mid-Year Report and C&W Market Analyses, C&W
made numerous assumptions with respect to industry performance, general business
and economic conditions, and other matters. Any estimates or approximations
contained therein could reasonably be subject to different interpretations by
other parties. Because predictions of future events are inherently subject to
uncertainty, none of C&W, the Company or any other person can assume that such
predicted rental rates, absorption or other events will occur as outlined or
predicted in the C&W Mid-Year Report or C&W Market Analyses. Reported asking
rental rates of properties, replacement cost rents or estimated replacement
costs do not purport to necessarily reflect the rental rates at which properties
may actually be rented, actual rents required to support new development or the
actual cost of replacement. In many instances, asking rents and actual rental
rates differ significantly.
 
     Changes in local, national and international economic conditions will
affect the markets described in the C&W Mid-Year Report and C&W Market Analyses.
Therefore, C&W can give no assurance that occupancy and absorption levels and
rental rates as of the date of the C&W Mid-Year Report or C&W Market Analyses
will continue or that such occupancy levels and rental rates will be attained at
any time in the future. Forecasts of absorption rates, rental activity,
replacement cost rents and replacement costs are C&W's estimates as of the dates
of the C&W Mid-Year Report and C&W Market Analyses. Actual future market
conditions may differ materially from the forecasts and projections contained
therein.
 
     C&W is a part of a national network of affiliated companies providing real
estate services. As such, from time to time, C&W and its affiliates have
provided and in the future may provide real estate related services, including
brokerage and leasing agent services, to the Company or its principals, or may
represent the Company, its principals or others doing business with the Company.
C&W received compensation of $21,000 from the Company in connection with C&W's
preparation of the C&W Market Analyses.

 
                                       106

<PAGE>   1


Exhibit 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent public accountants, we hereby consent to the incorporation by
reference in this Form 8-K of our report dated October 31, 1996 on the statement
of revenue and certain expenses of the Delaware Corporate Center Acquisition
Property ("Delaware Corporate Center") included in the Form S-11 Registration
Statement (No. 333-13969) of Brandywine Realty Trust. It should be noted that we
have not audited any financial statements of the Delaware Corporate Center
subsequent to December 31, 1995 or performed any audit procedures subsequent to
that date.



                                                             ARTHUR ANDERSEN LLP
Philadelphia, Pa.,
 December 12, 1996
<PAGE>   2
Exhibit 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent public accountants, we hereby consent to the incorporation by
reference in this Form 8-K of our report dated October 31, 1996 on the combined
statement of revenue and certain expenses of the Equivest Management, Inc.
Acquisition Properties ("700/800 Business Center Drive") included in the Form
S-11 Registration Statement (No. 333-13969) of Brandywine Realty Trust. It
should be noted that we have not audited any financial statements of 700/800
Business Center Drive subsequent to December 31, 1995 or performed any audit
procedures subsequent to that date.



                                                             ARTHUR ANDERSEN LLP
Philadelphia, Pa.,
 December 12, 1996


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