CALI REALTY CORP /NEW/
8-K, 1996-12-30
REAL ESTATE INVESTMENT TRUSTS
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K


                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported) November 7, 1996

                             Cali Realty Corporation
- --------------------------------------------------------------------------------

             (Exact name of registrant as specified in its charter) 


         Maryland                    1-13274                   22-3305147
- --------------------------------------------------------------------------------
(state or other jurisdiction       (Commission                (IRS Employer
     or incorporation)             File Number)           Identification Number)


                  11 Commerce Drive, Cranford, New Jersey 07016
- --------------------------------------------------------------------------------

        Registrant's telephone number, including area code (908) 272-8000 


                                       N/A
- --------------------------------------------------------------------------------
          (Former name or former address, if changed since last report)
<PAGE>
Item 5.  Other Events.

         From  November  7,  1996  through   December  29,  1996,   Cali  Realty
Corporation and subsidiaries (the "Company") acquired,  through three individual
transactions  with unrelated  sellers,  a  three-building  office  complex,  two
neighboring  office buildings and one individual office building  (collectively,
the  "Acquisitions").  Each of the  Acquisitions  was  disclosed  as a  proposed
acquisition in the Company's Current Report on Form 8-K, dated October 29, 1996.
The aggregate  acquisition  cost of the  Acquisitions  was  approximately  $90.4
million.

         The following is a summary of each of the Acquisitions:

         On November 7, 1996,  the Company  acquired Five Sentry  Parkway East &
West ("Five Sentry"),  a two-building  office complex comprised of approximately
131,000 net rentable square feet located in Plymouth Meeting, Montgomery County,
Pennsylvania,  for approximately $12.4 million in cash, which was drawn from one
of the Company's credit facilities.  Such borrowing was subsequently repaid from
the net proceeds  received  from the Company's  public common stock  offering of
17,537,500 shares (the "November Offering") on November 22, 1996.

         On  December  10,  1996,  the  Company   acquired  300  Tice  Boulevard
("Whiteweld"),  a 230,000 net rentable  square foot office  building  located in
Woodcliff Lake, Bergen County,  New Jersey,  for approximately  $35.0 million in
cash, made available from the net proceeds received from the November Offering.

         On December 17, 1996, the Company acquired the  International  Court at
Airport Business Center  ("Airport  Center"),  a  three-building  office complex
comprised of  approximately  370,000 net rentable square feet located in Lester,
Delaware  County,  Pennsylvania  for  approximately  $43.0 million in cash, made
available from the net proceeds received from the November Offering.

         The foregoing  descriptions of the  Acquisitions are not intended to be
complete and are qualified in their  entirety by the completed  text of material
agreements setting forth the specific terms of the Acquisitions,  which material
agreements are filed as Exhibits 10.51 through 10.56 hereto and are incorporated
herein by reference.
<PAGE>
Item 7.  Financial Statements, Proforma Financial Information and Exhibits.

(c)      Exhibits.

Exhibit
Number                              Exhibit Title
- ------                              -------------
 
10.51       Agreement of  Assignment  of Agreement for Purchase and Sale of Real
            Estate and Related Property,  dated as of October 23, 1996,  between
            Bryemere, L.P. and Five Sentry Realty Associates, L.P.

10.52       Purchase  Agreement,  dated  October  11,  1996,  between  Whiteweld
            Centre, Inc. and Cali Realty Acquisition Corporation.

10.53       First  Amendment  to Purchase  Agreement,  dated as of December  10,
            1996,  by  and  between  Whiteweld  Centre,  Inc.  and  Cali  Realty
            Acquisition Corporation.

10.54       Agreement  of  Sale,   dated   October  23,   1996,   by  and  among
            Henderson/Tinicum   Partnership,   International  Court  II  Limited
            Partnership,  International  Court  III  Joint  Venture,  Wilbur  C.
            Henderson  &  Son,  David  Henderson  and  Cali  Realty  Acquisition
            Corporation.

10.55       Amendment to Agreement of Sale, dated December 3, 1996, by and among
            Henderson/Tinicum   Partnership,   International  Court  II  Limited
            Partnership,  International  Court  III  Joint  Venture,  Wilbur  C.
            Henderson  &  Son,  David  Henderson  and  Cali  Realty  Acquisition
            Corporation.

10.56       Second  Amendment to Agreement of Sale,  dated December 17, 1996, by
            and  among  Henderson/Tinicum  Partnership,  International  Court II
            Limited Partnership,  International Court III Joint Venture,  Wilbur
            C.  Henderson & Son,  David  Henderson  and Cali Realty  Acquisition
            Corporation.
<PAGE>
                                   SIGNATURES


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

Dated:  December 30, 1996    

                                      CALI REALTY CORPORATION

                                      By:  /s/ Thomas A. Rizk
                                          ------------------
                                          Thomas A. Rizk
                                          President and Chief
                                          Executive Officer

                                      By: /s/Barry Lefkowitz
                                          ------------------
                                          Barry Lefkowitz
                                          Vice President - Finance
                                          and Chief Financial
                                          Officer

<PAGE>

                                 Exhibit Index


Exhibit
Number                              Exhibit Title
- ------                              -------------
 
10.51       Agreement of  Assignment  of Agreement for Purchase and Sale of Real
            Estate and Related Property,  dated as of October 23, 1996,  between
            Bryemere, L.P. and Five Sentry Realty Associates, L.P.

10.52       Purchase  Agreement,  dated  October  11,  1996,  between  Whiteweld
            Centre, Inc. and Cali Realty Acquisition Corporation.

10.53       First  Amendment  to Purchase  Agreement,  dated as of December  10,
            1996,  by  and  between  Whiteweld  Centre,  Inc.  and  Cali  Realty
            Acquisition Corporation.

10.54       Agreement  of  Sale,   dated   October  23,   1996,   by  and  among
            Henderson/Tinicum   Partnership,   International  Court  II  Limited
            Partnership,  International  Court  III  Joint  Venture,  Wilbur  C.
            Henderson  &  Son,  David  Henderson  and  Cali  Realty  Acquisition
            Corporation.

10.55       Amendment to Agreement of Sale, dated December 3, 1996, by and among
            Henderson/Tinicum   Partnership,   International  Court  II  Limited
            Partnership,  International  Court  III  Joint  Venture,  Wilbur  C.
            Henderson  &  Son,  David  Henderson  and  Cali  Realty  Acquisition
            Corporation.

10.56       Second  Amendment to Agreement of Sale,  dated December 17, 1996, by
            and  among  Henderson/Tinicum  Partnership,  International  Court II
            Limited Partnership,  International Court III Joint Venture,  Wilbur
            C.  Henderson & Son,  David  Henderson  and Cali Realty  Acquisition
            Corporation.























                                  EXHIBIT 10.51

<PAGE>
                  AGREEMENT OF  ASSIGNMENT OF AGREEMENT FOR PURCHASE AND SALE OF
REAL ESTATE AND RELATED PROPERTY (the "Assignment  Agreement") entered into this
23rd day of October,  1996,  between  BRYEMERE,  L.P.,  a  Pennsylvania  limited
partnership ("Contract Vendee"), having an office c/o 443 South Gulph Road, King
of  Prussia,   Pennsylvania   19406  and  FIVE  SENTRY  REALTY  ASSOCIATES  L.P.
("Assignee"),  a  Pennsylvania  limited  partnership,  having an office c/o Cali
Realty Corporation, 11 Commerce Drive, Cranford, New Jersey 07016.

                              W I T N E S S E T H:

                  WHEREAS,  as of the 17th day of July,  1996,  an Agreement for
Purchase  and Sale of Real Estate and Related  Property was entered into between
Mellon Bank,  N.A., as Ancillary  Trustee under Trust Agreement dated August 10,
1984, as seller  ("Seller"),  and Contract  Vendee,  as purchaser,  covering the
purchase and sale of premises known as Five Sentry Parkway,  East and West, City
of Blue Bell,  Montgomery County,  Pennsylvania,  which agreement was amended by
that certain letter agreement (the "Letter  Agreement")  dated September 6, 1996
(collectively, the "Sales Agreement") and more particularly described in Exhibit
"A" annexed hereto ("Premises"); and

                  WHEREAS,  Contract Vendee is desirous of assigning to Assignee
all of the right,  title and  interest  of  Contract  Vendee in and to the Sales
Agreement; and

                  WHEREAS,  the  parties  agree that any  capitalized  terms not
otherwise defined herein shall have the meaning  attributed to them in the Sales
Agreement.

                  NOW,  THEREFORE,  in  consideration  of the  Premises  and the
mutual covenants expressed herein, the parties hereto hereby agree as follows:

                  1. ASSIGNMENT OF SALES AGREEMENT; ASSIGNMENT PRICE.


                  (a) So long as the  conditions  to the Closing have  occurred,
Contract  Vendee agrees to assign to Assignee all of Assignor's  rights,  titles
and  interests  in and to the Sales  Agreement  (but not  including  the Deposit
posted by Contract Vendee with Seller),  which  assignment shall be effective as
of the Closing,  on the terms and  conditions  set forth below,  pursuant to the
Assignment of Sales Agreement (the "Assignment") annexed hereto as Exhibit "B".


                  (b) The assignment price payable to Contract Vendee on account
of this Assignment  Agreement is of One Million Five Hundred Thousand and xx/100
($1,500,000.00) Dollars (the "Assignment Price"), payable as follows:

                           (i) Two  Hundred  Thousand  and xx/100  ($200,000.00)
Dollars (the  "Deposit") to be paid to Adelman Lavine Gold and Levine and Pryor,
Cashman,  Sherman & Flynn  (collectively,  the "Escrow  Agent") upon delivery to
Assignee of a fully executed copy of this  Assignment  Agreement,  which Deposit
shall be held in escrow in accordance with the provisions hereinafter set forth;
and

                           (ii) One Million  Three  Hundred  Thousand and xx/100
($1,300,000.00)  Dollars at Closing  (as  defined  below),  by wire  transfer of
immediately available funds to Contract Vendee and as provided herein.
<PAGE>
                  (c) At and only upon the Closing,  Assignee  shall also pay to
Seller  the  amount  due  Seller  under the Sales  Agreement  on  account of the
Purchase  Price  thereunder  in an  amount  equal to Ten  Million  Nine  Hundred
Thousand and xx/100 ($10,900,000.00)  Dollars, subject to adjustment as provided
in the Sales  Agreement,  which  Contract  Vendee  represents  and  warrants  to
Assignee is the Purchase Price. In the event that Seller has applied the Deposit
posted by  Contract  Vendee to the  Purchase  Price  under the Sales  Agreement,
Assignee shall  reimburse  Contract  Vendee for the Deposit at Closing and shall
pay to Seller the Purchase Price in an amount equal to $10,700,000.00.

                  2. INTENTIONALLY OMITTED


                  3. MATTERS TO WHICH THIS SALE IS SUBJECT

                  (a) Except as set forth in subsection (b) below,  title to the
Real Property and to the Personal Property shall be as set forth in Section 6 of
the Sales Agreement. Contract Vendee represents and warrants to Assignee that it
has not issued any notice of any defect,  encumbrance  or other title  objection
and  covenants  that it (i) shall not issue any such notice  without  Assignee's
prior  consent,  (ii) will issue any such notice which  Assignee so requests and
(iii) will exercise the options set forth in Section 6.C. of the Sales Agreement
as directed by Assignee.

                  (b)  Notwithstanding  the  provisions of subsection (a) above,
Contract  Vendee shall cause to be terminated  and removed of record the matters
described in No. 17 of Schedule B, Section 1 of the Title Commitment,  and title
to the Premises shall conveyed to Assignee free and clear of such matters at the
Closing.

                  4. REPRESENTATIONS AND WARRANTIES.

                  (a)  Contract  Vendee,  to induce  Assignee to enter into this
Assignment   Agreement  and  to  complete  the  Closing,   makes  the  following
representations and warranties to Assignee, which representations and warranties
are true and correct as of the date of this Assignment  Agreement,  and shall be
true and  correct  at and as of the  Closing  in all  respects  as  though  such
representations  and  warranties  were  made  both at and as of the date of this
Assignment Agreement, and at and as of the Closing:

                           (i) Annexed hereto as Exhibit "C" annexed hereto is a
true, complete and correct copy of the Sales Agreement,  and the Sales Agreement
has not been modified, changed or amended (other than by the Letter Agreement);

                           (ii) The Sales Agreement is in full force and effect,
is a valid contract and is legally enforceable in accordance with its terms, and
represents the entire agreement  between Contract Vendee and Seller with respect
to the Premises;

                           (iii)  Contract  Vendee  has,  to  the  best  of  its
knowledge,   heretofore  timely  performed  and  observed  all  of  the  duties,
obligations,  terms, covenants and conditions of the Sales Agreement on its part
to be performed or observed thereunder;

                           (iv)  All  representations  contained  in  the  Sales
Agreement made by Contract Vendee, and to the best knowledge of Contract Vendee,
made by Seller, are and continue to be true and correct;
<PAGE>
                           (v) Neither Seller nor Contract Vendee has declared a
default  under the Sales  Agreement,  and,  to the best  knowledge  of  Contract
Vendee,  no event has occurred or failed to occur  which,  but for the giving of
notice or passage of time,  or both,  would  constitute a default  thereunder by
either Seller or Contract Vendee;

                           (vi)  Contract  Vendee  has not  assigned,  conveyed,
encumbered, mortgaged, pledged or transferred all or any part of its interest in
the Sales Agreement;

                           (vii) No person,  firm,  corporation  or other entity
other than  Assignee has any right or option to acquire the Premises or any part
thereof arising from any act of Contract Vendee;

                           (viii)   Contract   Vendee  has   delivered  or  made
available to Assignee true,  correct and complete  copies any and all documents,
instruments,  agreements and other items in its  possession  with respect to the
Premises,  including without limitation the Leases,  the Service Contracts,  the
Title  Commitment,  the  Required  Number  of  Estoppel  Certificates,  Seller's
Estoppel  Certificates,  the Information Package,  any schedules,  summaries and
projections  of tenant  improvement  costs and leasing  commission  obligations,
tenant  profiles and summaries and  structural,  engineering  and  environmental
assessment reports with respect to the Premises;

                           (ix) Contract  Vendee has not received from Seller or
any other party any notice of any litigation,  insurance claim, personal injury,
proceeding  (zoning  or  otherwise)  or  governmental  investigation  pending or
threatened  against or relating to the Premises or the transaction  contemplated
by the Sales Agreement other than as set forth on Exhibit "D" annexed hereto; to
the extent any matter is set forth on Exhibit "D";  Contract  Vendee  represents
and warrants that there is adequate liability insurance coverage for same;

                           (x) To the best  knowledge  of Contract  Vendee,  the
only leases, tenancies,  licenses and other agreements for the use and occupancy
of any  portion  of the  Premises  other  than  the  Leases  are  those  leases,
tenancies,  licenses  and  other  agreements  listed  on  Exhibit  "E" (the "New
Leases"),  which Exhibit is a true, correct and complete list of New Leases; the
representations and warranties of Seller with respect to the Leases set forth in
Sections 8.A.9 and 8.A.10.  of the Sales Agreement are hereby deemed repeated in
their entirety in this  Assignment  Agreement by Contract Vendee with respect to
the New Leases;

                           (xi)  Annexed  hereto  as  Exhibit  "F"  is  a  true,
complete and correct schedule of the leasing  commission  agreements for the New
Leases.  True, complete and correct copies of said agreements are annexed hereto
as a schedule to Exhibit "F";


                           (xii) To the best knowledge of Contract Vendee, there
has been no  material  adverse  change  in the  status  of the  Premises  or any
contracts  or  agreements   relating  thereto   (including   without  limitation
additional leases,  renewals,  extensions or amendments  thereto,  or additional
service contracts) except for the New Leases;
<PAGE>
                           (xiii) The execution and delivery of this  Assignment
Agreement and the performance by Contract  Vendee of its  obligations  hereunder
will not conflict with or result in a breach of any law, regulation or order, or
any  agreement or  instrument  to which  Contract  Vendee is a party or by which
Contract Vendee is bound; and this Assignment  Agreement and the documents to be
delivered by Contract  Vendee  pursuant to this  Assignment  Agreement will each
constitute  the  legal,  valid  and  binding  obligations  of  Contract  Vendee,
enforceable in accordance with their respective terms,  covenants and conditions
subject only to the Seller's consent to the assignment of the Sales Agreement to
Assignee as set forth in the Sales Agreement;  and there are no claims, defenses
(personal or otherwise) or offsets to the validity of or enforceability  against
Contract Vendee of this  Assignment  Agreement and the documents to be delivered
pursuant hereto;

                           (xiv)  Intentionally Deleted.

                           (xv)  Intentionally Deleted.

                           (xvi)  Contract  Vendee  has not  received  any Lease
Proposals  from Seller nor has  Contract  Vendee  consented to or been deemed to
have  consented to any Lease  Proposals  except for the sublease  identified  on
Exhibit "I";

                           (xvii)  Annexed  hereto as Exhibit  "J" is a true and
correct list of Service  Contracts which have been assigned to and/or assumed by
Contract Vendee under the Sales Agreement;

                           (xviii)  As of the  date  of  Closing,  there  are no
payments  required to be paid with respect to the period prior to Closing  under
the  documents  specified in No. 4, No. 8 and No. 12 of Schedule B, Section 2 of
the Title Commitment; and

                           (xix)  Contract  Vendee shall maintain a net worth of
at least $500,000 for at lease one (1) year following the Closing.

                  (b)  Assignee,  to induce  Contract  Vendee to enter into this
Assignment Agreement and to complete the Closing, hereby represents and warrants
that the execution and delivery of this Assignment Agreement and the performance
by Assignee of its  obligations  hereunder will not conflict with or result in a
breach of any law,  regulation or order, or any agreement or instrument to which
Assignee is a party or by which Assignee is bound; and this Assignment Agreement
and the  documents  to be  delivered  by Assignee  pursuant  to this  Assignment
Agreement  will each  constitute  the legal,  valid and binding  obligations  of
Assignee,  enforceable in accordance with their respective terms,  covenants and
conditions; and there are no claims, defenses (personal or otherwise) or offsets
to the  validity  of or  enforceability  against  Assignee  of  this  Assignment
Agreement and the documents to be delivered pursuant hereto.

                  5. COVENANTS.

                  Contract  Vendee hereby  covenants and agrees that between the
date hereof and the Closing,  and with respect to the Closing,  it shall perform
and observe the following with respect to the Premises and the Sales Agreement:

                  (a)  Contract  Vendee  shall  continue  to timely  perform and
observe all of the duties,  obligations,  terms, covenants and conditions of the
Sales Agreement on its part to be performed or observed thereunder;
<PAGE>
                  (b)  Contract  Vendee  shall  not  modify,  terminate,  amend,
cancel, surrender or, with the exception of this Assignment Agreement,  make any
agreement affecting the Sales Agreement without first obtaining Assignee's prior
written consent, which will not be unreasonably withheld or delayed;

                  (c) Contract  Vendee shall not grant any consents or approvals
with  respect to the  Premises  and shall not enter into or caused to be entered
into any agreements,  leases,  tenancies,  licenses or contracts with respect to
the Premises without first obtaining  Assignee's  prior written  consent,  which
will not be unreasonably withheld or delayed;

                  (d) Contract Vendee shall use its best efforts to cause Seller
(i) to operate and maintain the Premises in the ordinary  course of business and
use reasonable efforts to reasonably  preserve for Assignee the relationships of
Seller and Seller's tenants,  suppliers,  managers,  employees and others having
on-going  relationships  with  the  Premises,   (ii)  to  complete  any  capital
expenditure  program currently in process or anticipated to be completed through
the date of  closing  under the Sales  Agreement  and (iii) not to defer  taking
actions or spending its funds, or otherwise manage the Premises differently, due
to the pending sale of the  Premises,  except as  specifically  permitted in the
Sales Agreement;

                  (e)  Contract  Vendee  shall  forward to Assignee all notices,
communications,  demands or requests received by Contract Vendee with respect to
the Premises promptly after receipt;

                  (f) Contract  Vendee shall advise Seller that Contract  Vendee
has assigned the Sales  Agreement to Assignee  effective as of the Closing,  and
shall use its best  efforts to obtain and  deliver an  original  counterpart  of
Seller's unconditional written consent to Assignee as to such assignment in form
and substance reasonably  satisfactory to Assignee,  and cause Seller to prepare
and execute all  documents,  items and  instruments  required to be delivered at
Closing  under the Sales  Agreement in the name and for the benefit of Assignee.
The Seller's  consent to the assignment of the Sales Agreement to Assignee shall
be  unconditional  or, if  conditions  are  imposed,  Contract  Vendee,  and not
Assignee,  shall be required to perform or satisfy  same,  except that  Assignee
shall agree to be bound by and assume the obligations of the Purchaser under the
Sales Agreement;

                  (g) Contract  Vendee shall include  Assignee and its agents in
all aspects in the closing of the Sales  Agreement,  including by way of example
and not  limitation,  closing  documents and closing  adjustments  provided that
Closing under this Assignment Agreement occurs simultaneously with closing under
the Sales Agreement;

                  (h)  Contract  Vendee shall  cooperate  in all  respects  with
Assignee in connection with the acquisition by Assignee of the Premises;

                  (i) Contract Vendee shall cause to be completed, at no cost to
Assignee,  no later than  December  31,  1996,  all parking lot  renovations  in
accordance  with  the  revised  layout  plans  illustrating  a  minimum  of  448
additional  parking spaces (3.4 spaces per thousand square feet) attached hereto
as Exhibit "K", in a good "and workmanlike  manner,  lien free and in accordance
with all applicable laws and all insurance  requirements.  Contract Vendee shall
deliver (or cause to be  delivered) to Assignee  within ten (10) days  following
<PAGE>
completion  of the work,  (x) a copy of a final,  unconditional  Certificate  of
Occupancy (or other reasonable  documentary  proof) evidencing the completion of
such work in accordance  with law, (y) a certificate  from a licensed  architect
that such work has been completed in accordance  with law and the plans attached
as Exhibit  "K", and (z) evidence  reasonably  satisfactory  to Assignee and its
title  company that such work has been paid for in full and free from any liens.
Contract  Vendee shall  indemnify,  defend and hold  Assignee  harmless from and
against all claims, suits, liens, actions proceedings,  liabilities, damages and
expenses (including, without limitation,  reasonable attorneys fees) arising out
of or relating to the performance of the work  (including,  without  limitation,
any injury or damage to  property) or the failure  liensto  complete the same in
accordance with this  paragraph.  The provisions of this paragraph shall survive
the closing; and

                  (j)  Contract  Vendee  shall use its best efforts to cause the
Seller to perform all of its covenants and obligations under the Sales Agreement
in accordance with its terms up to the date of the Closing.

                  6. ASSIGNEE'S RIGHTS RESPECTING SALES AGREEMENT.

                  If Contract  Vendee shall fail to obtain  Seller's  consent to
the  assignment of the Sales  Agreement to Assignee in  accordance  with Section
5(f) above,  Contract  Vendee shall notify Assignee of such failure and Contract
Vendee  shall  close  title to the  Premises  in its own  name  and  immediately
thereafter  convey title to the Premises to Assignee  upon,  and subject to, the
terms and  conditions  set  forth in the Sales  Agreement  as  modified  by this
Assignment  Agreement  except  that:  (i) at the  Closing,  Assignee  shall  pay
Contract Vendee (or, at the Contract Vendee's direction,  the Seller) the amount
due Seller  under the Sales  Agreement  on account of the  Purchase  Price in an
amount equal to $10,900,000.00,  subject to adjustment as provided herein and in
the Sales Agreement;  (ii) Contract Vendee shall be deemed to have made, for the
benefit of Assignee, all representations, warranties and covenants of the Seller
contained in the Sales Agreement,  and Contract Vendee shall execute and deliver
to Assignee at the Closing a  certification  of same; and (iii) Contract  Vendee
shall pay, and indemnify and hold Assignee harmless from, all costs and expenses
relating to or arising out of Contract Vendee's failure to obtain the consent of
the Seller to the  assignment  of the Sales  Agreement  to  Assignee  including,
without  limitation,  Contract  Vendee's  closing  title  to  the  Premises  and
conveyance of same to Assignee,  all transfer  taxes,  title  insurance fees and
premiums and recording fees, but excluding  Assignee's  attorney's fees incurred
in connection with such transaction, which obligation shall survive the Closing.

                  7. ITEMS TO BE  DELIVERED OR CAUSE TO BE DELIVERED BY CONTRACT
                  VENDEE ON THE CLOSING DATE

                  On the Closing  date,  Contract  Vendee,  at its sole cost and
expense, will deliver or cause to be delivered to Assignee the following:

                  (a)  All  of  the  documents,  items  and  instruments  to  be
delivered  by  Seller  and  Contract  Vendee  under  and  pursuant  to the Sales
Agreement;

                  (b) Any documents reasonably required by Assignee or necessary
in  order  to  effectuate  the  transactions  contemplated  by  this  Assignment
Agreement,  including  by  way  of  example  and  not  limitation,   affidavits,
assurances, acknowledgments, deeds, and transfer tax returns;
<PAGE>
                  (c) The Assignment;

                  (d) Seller's written consent and approval to the assignment of
the Sales  Agreement  to Assignee as  provided in Section  5(f) above  (subject,
however, to Section 6 above);


                  (e) An affidavit on account of Contract  Vendee in the form of
Exhibit "G", FIRPTA Affidavit;

                  (f) Any  agreements  contracts,  reports,  analysis,  studies,
leases, licenses,  tenancies,  material, documents and items with respect to the
Premises in the  possession  of Contract  Vendee or required to be  delivered to
Assignee  pursuant to the terms hereof which have not previously  been delivered
to Assignee;

                  (g) All  estoppel  certificates  required to be  delivered  by
Seller  pursuant to Section  10.D.(ii) of the Sales Agreement and those estoppel
certificates   which   Contract   Vendee  has   acknowledged   as  having   been
satisfactorily delivered pursuant to Paragraph 2 of the Letter Agreement;


                  (h) The  Replacement  Reserve  and  the  Common  Area  Reserve
described  in Section 17 hereof,  together  with  Escrow  Agreement I and Escrow
Agreement II (as hereinafter defined); and


                  (i) All other documents, instruments and materials required to
be delivered to Assignee pursuant to the terms of this Assignment Agreement.

                  8. SURVIVAL OF REPRESENTATIONS, WARRANTIES AND OBLIGATIONS

                  The  representations,  warranties and  obligations of Contract
Vendee set forth in Sections  4(a)(i),  (vi), (vii) and (xix) of this Assignment
Agreement  shall  remain in effect  for a period of one (1) year  following  the
Closing and thereafter if Assignee shall have given to Contract Vendee notice of
a breach thereof within one (1) year period.

                  9. OBLIGATIONS WITH RESPECT TO SALES AGREEMENT.

                  Contract  Vendee and Assignee hereby agree as to the following
with respect to certain of the  obligations  of Contract  Vendee under the Sales
Agreement and this Assignment Agreement:

                  (a) Contract  Vendee shall pay an amount which is equal to the
amount Contract Vendee is obligated to pay pursuant to Section 9.A. of the Sales
Agreement,  all realty  transfer taxes,  recordation and documentary  stamps and
taxes imposed on account of the Assignment Price, and one-half of all reasonable
escrow fees.  Contract  Vendee's tax obligation  attributable  to the Assignment
Price  shall be held in  escrow  by Pryor,  Cashman,  Sherman & Flynn  ("PCS&F")
pending a final determination by the Pennsylvania  Supreme Court regarding taxes
of this type. If it is finally determined that said tax is due, then such amount
shall be promptly paid to the appropriate taxing authority;  if it is determined
that no such tax is due, then such amount shall be promptly returned to Contract
Vendee together with any interest thereon.
<PAGE>
                  (b) Any claims arising out of Contract Vendee's entry upon the
Premises shall be the  responsibility of Contract Vendee, and any claims arising
out of  Assignee's  entry  upon  the  Premises  shall be the  responsibility  of
Assignee;

                  (c)  Contract  Vendee  shall be obligated to make the payments
required of it pursuant to Section
9. of the Sales Agreement;

                  (d)  Contract  Vendee  shall be obligated to make all payments
due on account of  outstanding  or deferred  leasing  commissions  and costs for
tenant improvements for all Leases (including but not limited to the obligations
under the Merck lease and Selas Fluids  lease)  executed  prior to Closing under
the Sales  Agreement,  and all  Leasing  Costs  with  respect  to (i) New Leases
executed  prior to  Closing  under  the  Sales  Agreement,  (ii)  extensions  or
expansions  of  existing  Leases  executed  prior to  Closing  under  the  Sales
Agreement,  and (iii) the failure of a tenant to exercise a cancellation  option
(if any)  contained  in a New Lease  executed  prior to Closing  under the Sales
Agreement. The foregoing obligations shall survive Closing;

                  (e) Contract  Vendee shall cause Seller to pay one-half of the
cost of the title commitment and the new owner's title insurance policy insuring
Assignee; and

                  (f)  Contract  Vendee  shall  deliver to  Assignee  reasonably
satisfactory  evidence that the base amount to be used for calculating operating
expense  escalation  payments under each of the Merck leases shall be a total of
no less than $639,668.

                  10. TITLE.

                  Notwithstanding  anything  to the  contrary  contained  in the
Sales  Agreement,  title to the Premises shall be insured by  Commonwealth  Land
Title Insurance  Company or such other title company  selected by Assignee (with
the consent of Seller,  to the extent such  consent is required  under the Sales
Agreement) which is licensed in the State of Pennsylvania (the "Title Company").
If title to the  Premises  is not  conveyed  to  Assignee  pursuant to the Sales
Agreement  and this  Assignment  Agreement as a result of any act or omission of
Contract Vendee, Contract Vendee shall be responsible for all title fees, survey
expenses and search charges of the Title Company. In all other events,  Assignee
and Seller  shall be  responsible  for the  premiums,  costs and expenses of the
Title Company.

                  11. CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS.

                  The  obligations  of  Assignee  to accept the  Assignment,  to
acquire the Premises and to perform the other  covenants and  obligations  to be
performed  by  Assignee on the  Closing  date shall be subject to the  following
conditions  (all  or any of  which  may be  waived,  in  whole  or in  part,  by
Assignee):

                  (a) The  representations  and warranties made by Seller in the
Sales Agreement and Contract  Vendee in this Assignment  Agreement shall be true
and  correct  in all  respects  with the same  force and  effect as though  such
representations  and warranties  had been made on and as of the Closing,  except
that for purposes of this paragraph (a), the  representations  and warranties of
Contract  Vendee shall be without  regard to any knowledge  standard of Contract
Vendee.
<PAGE>
                  (b)  Seller  and  Contract  Vendee,  respectively,  shall have
performed all covenants  and  obligations  undertaken by Seller in Section 10 of
the  Sales  Agreement  and  Contract  Vendee  in  Section  5 of this  Assignment
Agreement in all respects and complied with all conditions required by the Sales
Agreement and this  Assignment  Agreement to be performed or complied with by it
on or before the Closing.

                  (c) The satisfaction by Seller of its obligations as set forth
in Section 8.D., 9.B.4.,  9.B.5.,  10.D., 10.E. and 10.G. of the Sales Agreement
and which shall be subject to Assignee's  approval,  which approval shall not be
unreasonably withheld or delayed.

                  (d) The Title Company is prepared to issue to Assignee a Title
Policy meeting the  requirements  set forth in Section 6. of the Sales Agreement
subject only to the payment of the premium therefor by Assignee.

                  (e)  Seller  and  Contract  Vendee,  respectively,  shall have
delivered to Assignee all of the documents enumerated in Section 10.A. and 10.B.
of the Sales Agreement and Section 7 of this Assignment  Agreement  subject only
to the payment of the premium therefore by Assignee.

                  12. CLOSING.

                  The closing of title shall take place on or about  November 1,
1996 (the "Closing"), at the time and location specified in the Sales Agreement,
unless extended in accordance with this Assignment  Agreement.  This transaction
shall be consummated  simultaneously  with the transaction  covered by the Sales
Agreement.  The Premises shall be conveyed  directly from the Seller to Assignee
at the Closing so as to vest title to the Premises in the  Assignee  pursuant to
the terms of the Sales  Agreement  subject,  however,  to the terms of Section 6
hereof.

                  13. INTENTIONALLY OMITTED

                  14. REMEDIES.

                  (a) In the event  Assignee  fails to perform  on the  Closing,
Assignee's  sole liability and Contract  Vendee's sole recourse shall be limited
to the amount of the  Deposit.  Contract  Vendee  agrees that  retention  of the
Deposit  constitutes  fixed and liquidated  damages  resulting  from  Assignee's
default, and Contract Vendee waives any other claim, at law or in equity, either
against  Assignee  or  against  any  person,  known  or  unknown,  disclosed  or
undisclosed.

                  (b) (i) If, after  complying with the terms of this Assignment
Agreement,  Contract  Vendee shall be unable to perform in  accordance  with the
terms of this  Assignment  Agreement,  Contract  Vendee  shall direct the Escrow
Agent to refund to Assignee the Deposit,  whereupon  this  Assignment  Agreement
shall be deemed  cancelled  and the  parties  hereto  shall be  released  of all
obligations and liabilities under this Assignment  Agreement,  except those that
are  expressly  stated  to  survive  the  cancellation  or  termination  of this
Assignment Agreement.
<PAGE>
                           (ii)  In the  event  of any  default  on the  part of
Seller or Contract  Vendee,  or Seller's or Contract  Vendee's failure to comply
with any representation, warranty or agreement in the Sales Agreement or herein,
respectively,  Assignee  shall be  entitled  to (a)  terminate  this  Assignment
Agreement  upon notice to Contract  Vendee,  in which event the Deposit shall be
returned by Escrow Agent to Assignee and neither party shall thereafter have any
further  obligations  under this  Assignment  Agreement,  (b) commence an action
against Seller, Contract Vendee or both seeking specific performance of Seller's
and Contract Vendee's  obligations under the Sales Agreement and this Assignment
Agreement, respectively or (c) in the event of a willful default by Seller under
the Sales Agreement,  Contract Vendee under the Assignment  Agreement,  or both,
Assignee  may  pursue  any and all of its  remedies  at law or in  equity or any
combination thereof against the defaulting party.

                  15. ESCROW AGREEMENT

                  The parties agree that the Deposit shall be held by the Escrow
Agent in escrow and disposed of only in accordance  with the  provisions of this
Section  15. The parties  agree that if the Deposit is cash,  such cash shall be
invested in an assignable interest-bearing  certificate of deposit, money market
fund,  treasury bill or other similar  security  approved by Contract Vendee and
Assignee, and all interest accruing thereon shall be paid to Assignee, except as
otherwise provided herein.

                  (a) The Escrow  Agent will  deliver  the  Deposit to  Contract
Vendee or to Assignee, as the case may be, under the following conditions:

                           (i) To Contract Vendee at Closing;

                           (ii) To  Contract  Vendee  upon  receipt  of  written
demand  therefor,  such  demand  stating  that  Assignee  has  defaulted  in the
performance  of this  Assignment  Agreement and  specifically  setting forth the
facts and  circumstances  underlying  such  default.  The Escrow Agent shall not
honor such demand  until more than five (5) days have  elapsed  after the Escrow
Agent has mailed a copy of such demand to Contract  Vendee or  Assignee,  as the
case may be, nor  thereafter  if the Escrow  Agent shall have  received  written
notice of objection  from Assignee in accordance  with the  provisions of clause
(b) of this Section 15; or

                           (iii) To  Assignee  upon  receipt of  written  demand
therefor,  such  demand  stating  that this  agreement  has been  terminated  in
accordance with the provisions  hereof,  or Contract Vendee has defaulted in the
performance of this Assignment  Agreement,  and  specifically  setting forth the
facts and  circumstances  underlying  the same. The Escrow Agent shall not honor
such demand  until more than five (5) days have  elapsed  after the Escrow Agent
has mailed a copy of such demand to Contract Vendee or Assignee, as the case may
be, nor  thereafter,  if the Escrow Agent shall have received  written notice of
objection  from the other party in accordance  with the provisions of clause (b)
of this Section 15.

                  (b) Upon the  filing of a written  demand  for the  Deposit by
Assignee or Contract  Vendee,  pursuant to subclause (ii) or (iii) of clause (a)
of this Section 15, the Escrow Agent shall  promptly  mail a copy thereof to the
other  party.  The other party shall have the right to object to the delivery of
the Deposit by filing  written notice of such objection with the Escrow Agent at
any time  within  five (5) days  after the  mailing  of such copy to it, but not
thereafter.  Such notice shall set forth the basis for objecting to the delivery
of the Deposit.  Upon receipt of such  notice,  the Escrow Agent shall  promptly
mail a copy thereof to the party who filed the written demand.
<PAGE>
                  (c) In the event the  Escrow  Agent  shall have  received  the
notice of objection provided for in clause (b) above and within the time therein
prescribed,  the Escrow Agent shall  continue to hold the Deposit  until (i) the
Escrow Agent receives written notice from Contract Vendee and Assignee directing
the  disbursement  of said Deposit,  in which case,  the Escrow Agent shall then
disburse said Deposit in accordance with said direction, or (ii) in the event of
litigation between Contract Vendee and Assignee,  the Escrow Agent shall deliver
the Deposit to the Clerk of the Court in which said  litigation  is pending,  or
(iii) the Escrow Agent takes such affirmative  steps as the Escrow Agent may, in
the Escrow Agent's  reasonable  opinion,  elect in order to terminate the Escrow
Agent's duties  including,  but not limited to,  depositing the Deposit with the
Court and bringing an action for interpleader,  the costs thereof to be borne by
whichever of Contract Vendee or Assignee is the losing party.

                  (d) The  Escrow  Agent  may act upon any  instrument  or other
writing  believed  by it in  good  faith  to be  genuine  and to be  signed  and
presented by the proper person and it shall not be liable in connection with the
performance  of any duties  imposed upon the Escrow Agent by the  provisions  of
this Agreement, except for damage caused by the Escrow Agent's own negligence or
willful  default.  The Escrow  Agent  shall  have no duties or  responsibilities
except  those set  forth  herein.  The  Escrow  Agent  shall not be bound by any
modification  of this  agreement,  unless the same is in  writing  and signed by
Assignee and Contract  Vendee,  and, if the Escrow Agent's duties  hereunder are
affected, unless Escrow Agent shall have given prior written consent thereto. In
the event that the Escrow  Agent  shall be  uncertain  as to the Escrow  Agent's
duties or rights  hereunder,  or shall  receive  instructions  from  Assignee or
Contract Vendee which, in the Escrow Agent's  opinion,  are in conflict with any
of the provisions  hereof,  the Escrow Agent shall be entitled to hold and apply
the  Deposit  pursuant  to clause  (c) above and may  decline  to take any other
action.  The  Escrow  Agent  shall not charge a fee for its  services  as escrow
agent.

                  16. NOTICE

                  All  notices,  demands,  requests,  or other  writings in this
agreement provided to be given or made or sent, or which may be given or made or
sent,  by either  party  hereto to the  other or by  Escrow  Agent,  shall be in
writing  and shall be  delivered  by  depositing  the same  with any  nationally
recognized  overnight delivery service, or by telecopy or fax machine, in either
event with all transmittal  fees prepaid,  properly  addressed,  and sent to the
following addresses:

If to Assignee:                    Five Sentry Realty Associates L.P.
                                   c/o Cali Realty Acquisition Corp.
                                   11 Commercial Drive
                                   Cranford, New Jersey  07016
                                   Attn: John J. Cali and Roger W. Thomas, Esq.
                                   (908) 272-8000 (tele.)
                                   (908) 272-6755 (fax)


with a copy to:                    Wayne Heicklen, Esq.
                                   Pryor, Cashman, Sherman & Flynn
                                   410 Park Avenue
                                   New York, New York  10022
                                   (212) 326-0854 (tele.)
                                   (212) 326-0806 (fax)
<PAGE>
If to Contract Vendee:             Bryemere, L.P.
                                   443 South Gulph Road
                                   King of Prussia, Pennsylvania  19406
                                   Attn: J. Brian O'Neill
                                   (610) 962-5101 (tele.)
                                   (610) 962-5108 (fax)

with a copy to:                    Kevin W. Walsh, Esq.
                                   Adelman Lavine Gold and Levin
                                   Suite 1900
                                   Two Penn Center Plaza
                                   Philadelphia, Pennsylvania  19102
                                   (215) 568-7515 (tele.)
                                   (215) 557-7922 (fax)

If to Escrow Agent:                Commonweath Land Title Insurance Company
                                   655 Third Avenue
                                   New York, New York
                                   Attention: William Deatley
                                   (212) 949-0100 (tele.)
                                   (212)  856-9308 (fax)

or to such other  address  as either  party may from time to time  designate  by
written  notice  to the  other  or to the  Escrow  Agent.  Notices  given by (i)
overnight  delivery  service as aforesaid shall be deemed received and effective
on the first  business day  following  such  dispatch  and (ii)  telecopy or fax
machine shall be deemed given at the time and on the date of machine transmittal
provided same is sent prior to 4:00 p.m. on a business day (if sent later,  then
notice shall be deemed given on the next  business day) and if the sending party
receives a written send verification on its machines and forwards a copy thereof
by regular  mail  accompanied  by such notice or  communication.  Notices may be
given by counsel for the parties  described  above,  and such  Notices  shall be
deemed  given by  Assignee  or  Contract  Vendee,  as the  case may be,  for all
purposes hereunder.

                  17. REPLACEMENT RESERVE ACCOUNT; COMMON AREA RENOVATIONS

                  (a) Contract  Vendee  shall remit a portion of the  Assignment
Price  in the  amount  of  Five  Hundred  Thousand  ($500,000.00)  Dollars  (the
"Replacement  Reserve")  directly to PCS&F and held by PCS&F,  as escrow  agent,
pursuant to the terms of the escrow  agreement  ("Escrow  Agreement  I") annexed
hereto as Exhibit "L". Assignee shall have the right to draw down any part of or
all of the Replacement  Reserve to pay for replacement air conditioning units or
other capital expenditures as they occur for a period of five (5) years from the
Closing.  Any funds remaining in the Replacement  Reserve at the end of the five
(5) year period shall be returned to Contract Vendee with interest.

                  (b)  Contract  Vendee  shall  also  remit  a  portion  of  the
Assignment Price in an amount not to exceed One Hundred  Thousand  ($100,000.00)
Dollars  (the  "Common  Area  Reserve")  directly to PCS&F and held by PCS&F who
shall act jointly with Adelman Lavine Gold and Levin as escrow agent pursuant to
the terms of an escrow  agreement  ("Escrow  Agreement  II"),  to be agreed upon
between the parties for purposes of funding common area renovations.  The Common
Area Reserve shall be released to Contract  Vendee in accordance with the Escrow
Agreement as the common area renovations are completed pursuant to the plans and
specifications to be agreed upon between the parties. Any funds remaining in the
Common Area  Reserve  upon  completion  of the common area  renovation  shall be
returned to Contract Vendee with interest.
<PAGE>
                  (c)  Assignee  hereby  consents  to  Contract  Vendee  or  its
affiliated  construction entity to perform the common area renovations set forth
in Section 17(b). If Contract Vendee or its affiliated construction entity shall
not  perform  said  work,  then  Assignee  shall  have the right to  select  the
contractor  therefor.  Any funds  remaining  in the  Common  Area  Reserve  upon
completion of the Common Area  renovations  shall be returned to Contract Vendee
with interest.

                  18. MISCELLANEOUS

                  (a) If any  instrument  or  deposit is  necessary  in order to
obviate a defect in or  objection or exception  to title,  the  following  shall
apply:  (i) any such  instrument  shall be in such form and shall  contain  such
terms and conditions as may be required by the Title Company to omit any defect,
objection or exception  to title,  (ii) any such deposit  shall be made with the
Title Company,  and (iii)  Contract  Vendee agrees to execute,  acknowledge  and
deliver,  or  cause  to  be  executed,  acknowledged  and  delivered,  any  such
instrument and to make any such deposit.

                  (b) This Assignment Agreement constitutes the entire agreement
between the parties and incorporates  and supersedes all prior  negotiations and
discussions between the parties.

                  (c) This  Assignment  Agreement  cannot be amended,  waived or
terminated orally, but only by an agreement in writing signed by the party to be
charged.

                  (d)  This  Assignment   Agreement  shall  be  interpreted  and
governed  by the laws of the State of New Jersey  and shall be binding  upon the
parties hereto and their respective successors and assigns.

                  (e) Whenever in this Assignment Agreement there is a provision
for the return of the  Deposit,  the  provision  shall be deemed to include  all
interest earned thereon and paid to Assignee.

                  (f) The caption headings in this Assignment  Agreement are for
convenience only and are not intended to be part of this agreement and shall not
be  construed  to  modify,  explain  or alter  any of the  terms,  covenants  or
conditions herein contained.

                  (g) If any term,  covenant or condition  of this  agreement is
held to be invalid,  illegal or  unenforceable  in any respect,  this  agreement
shall be construed without such provision.

                  (h) Each party shall, from time to time, execute,  acknowledge
and deliver such further  instruments,  and perform such additional acts, as the
other party may  reasonably  request in order to  effectuate  the intent of this
agreement.  Nothing  contained in this  Assignment  Agreement shall be deemed to
create  any  rights or  obligations  of  partnership,  joint  venture or similar
association  between  Contract Vendee and Assignee.  This  Assignment  Agreement
shall  be  given a fair  and  reasonable  construction  in  accordance  with the
intentions  of the  parties  hereto,  and  without  regard  to or aid of  canons
requiring  construction  against  Contract  Vendee,  Assignee or the party whose
counsel drafted this agreement.

                  (i)  This  Assignment  Agreement  shall  not be  effective  or
binding  until such time as it has been  executed  and  delivered by all parties
hereto.  This  Assignment  Agreement  may be executed  by the parties  hereto in
counterparts, all of which together shall constitute a single agreement.
<PAGE>
                  (j) This  Assignment  Agreement shall not create any rights in
any third parties against Assignee not otherwise heretofore in existence.

                  IN WITNESS  WHEREOF,  the parties have executed this agreement
as of the day and year first above written.

                                       CONTRACT VENDEE:

                                       BRYEMERE, L.P.

                                       By:  Bryemere Estate Planning and 
                                            Construction, Inc.,
                                            its general partner

                                       By:  /s/J. Brian O'Neill
                                            -------------------
                                     Name: J. Brian O'Neill
                                    Title:          
                                  

                                       ASSIGNEE:

                                       FIVE SENTRY REALTY ASSOCIATES L.P.

                                       By:  Cali Sub VIII, Inc.,
                                            its general partner


                                       By:  /s/ Roger W. Thomas
                                            -------------------
                                      Name: Roger W. Thomas
                                     Title: Vice President

                                       ESCROW AGENT:

                                       PRYOR, CASHMAN, SHERMAN & FLYNN


                                       By: /s/ Pryor, Cashman, Sherman & Flynn
                                           ------------------------------------
                                     Name:  
                                    Title:

                                       ADELMAN LAVINE GOLD AND LEVIN


                                       By: /s/ Kevin W. Walsh
                                           ------------------
                                     Name: Kevin W. Walsh
                                    Title: Treasurer



<PAGE>
                                LIST OF EXHIBITS

         Exhibit "A"  - Description of Premises

         Exhibit "B"  -  Form of Assignment of the Sales Agreement

         Exhibit "C"  -  Sales Agreement

         Exhibit "D"  -  Schedule of Litigation/Proceedings

         Exhibit "E"  -  New Leases

         Exhibit "F"  -  Schedule of Leasing Commissions for New Leases

         Exhibit "G"  -  FIRPTA Affidavit

         Exhibit "H" - 1995 Income and Expense Statement

         Exhibit "I"  -  Lease Proposal

         Exhibit "J" -  Service Contracts Assigned to and/or Assumed by Contract
                            Vendee under the Sales Agreement

         Exhibit "K"  -  Parking Lot Renovation Plans

         Exhibit "L"  -  Escrow Agreement I






                                  EXHIBIT 10.52

<PAGE>













                               PURCHASE AGREEMENT



                         DATED OCTOBER 11, 1996 BETWEEN



                             WHITEWELD CENTRE, INC.


                                       and


                       CALI REALTY ACQUISITION CORPORATION


<PAGE>
                           INDEX TO PURCHASE AGREEMENT

                         dated October 11, 1996, between

                             WHITEWELD CENTRE, INC.
                                       and
                       CALI REALTY ACQUISITION CORPORATION


Section                                  

 1.      Subject of Conveyance
 2.      Definitions of Certain Terms
 3.      Inspection Period;
           Purchaser's Right of Inspection Prior to Closing
 4.      Purchase Price and Terms of Payment
 5.      Matters to Which this Sale is Subject
 6.      Adjustments
 7.      Estoppel Certificates
 8.      Items to be Delivered by Seller on the Closing Date
 9.      Seller's Representations and Warranties
10.      Seller's Covenants
11.      Conditions Precedent to Purchaser's Obligations
12.      Expenses
13.      Tax Reduction and Appeals
14.      Leasing Commissions and Tenant Improvement Obligations
15.      Broker
16.      Title Report
17.      Casualty Loss
18.      Condemnation
19.      Remedies
20.      Assessment
21.      Closing
22.      Notice
23.      Escrow Agreement
24.      Assignment
25.      Environmental Representations
26.      Miscellaneous



<PAGE>




                              SCHEDULE OF EXHIBITS



Exhibit A                  Land
Exhibit B                  List of Personal Property
Exhibit C                  Schedule of Leases
Exhibit D                  Title Exceptions
Exhibit E                  Estoppel Certificates
Exhibit F                  Rent Roll
Exhibit G                  Schedule of Service Contracts
Exhibit H                  Tax Reduction Proceeding
Exhibit I                  Schedule of Leasing Commissions


<PAGE>

                                    AGREEMENT



         THIS  AGREEMENT made this 11th day of October,  1996 between  WHITEWELD
CENTRE, INC., a New Jersey corporation having an office c/o Whiteweld, Barrister
& Brown,  Inc., 300 Tice Boulevard,  Woodcliff Lake, New Jersey 07675 ("Seller")
and CALI  REALTY  ACQUISITION  CORPORATION,  a Maryland  corporation,  having an
office at 11 Commerce Drive, Cranford, New Jersey 07016 ("Purchaser").


                                    RECITALS

         A. Seller is the owner of the Premises (as hereinafter defined) located
in the  County of Bergen,  Township  of  Woodcliff  Lake,  State of New  Jersey,
commonly known as Whiteweld Centre, 300 Tice Boulevard, Woodcliff Lake.

         B. Seller has agreed to sell to Purchaser,  and Purchaser has agreed to
purchase  from Seller,  the Premises (as  hereinafter  defined),  subject to the
terms and conditions set forth herein.

         NOW, THEREFORE, in consideration of the mutual promises hereinafter set
forth and of other good and valuable consideration,  the receipt and sufficiency
of which are hereby  acknowledged,  the parties hereto,  intending to be legally
bound hereby, do hereby agree as follows:

         1. SUBJECT OF CONVEYANCE.

                  Seller hereby agrees to sell and convey,  and Purchaser hereby
agrees  to  purchase,  subject  to all terms  and  conditions  set forth in this
Agreement:

                           (i) those  certain  plots,  pieces or parcels of land
situate, lying and being in the County of Bergen, Township of Woodcliff Lake and
State of New Jersey  comprised  of  approximately  20 acres in the  aggregate of
developed land, as described in Exhibit A annexed hereto (the "Land"); and

                           (ii)  the   buildings,   open   parking   areas   and
improvements, including without limitation, all mechanical, electrical, heating,
ventilation,  air conditioning and plumbing  fixtures,  systems and equipment as
well as all compressors,  engines,  elevators and escalators, if any, erected on
the Land and commonly known as Whiteweld Centre,  300 Tice Boulevard,  Woodcliff
Lake, New Jersey (collectively, the "Building"); and

                           (iii) All leases and other agreements with respect to
the  occupancy  of the Land and  Building,  together  with  all  amendments  and
modifications  thereto, and rents,  additional rents,  reimbursements,  profits,
income, receipts and Security Deposits thereunder ("Leases") and all of Seller's
right,  title and  interest in and to those  contracts  and  agreements  for the
servicing,  maintenance  and  operation  of  the  Land  and  Building  ("Service
Contracts") to the extent Purchaser elects to assume same as provided in Section
8 herein; and
<PAGE>
                           (iv) all right,  title and  interest,  if any, of the
Seller in and to those certain fixtures, equipment, furniture and other personal
property affixed to or appurtenant to the Land and Building  including,  without
limitation, all carpets, drapes and other furnishings; maintenance equipment and
tools; keys to locks on or in the Building; and all other machinery,  equipment,
meters,  boilers, repair parts, fixtures and tangible personal property of every
kind and character and all accessions and additions  thereto owned by and in the
possession of Seller and attached to or located upon and used in connection with
the ownership,  maintenance,  or operation of the Land or Building which are not
the  property of tenants of the  Building  or of other  persons  (the  "Personal
Property"); and

                           (v) all right,  title and  interest,  if any,  of the
Seller in and to any land lying in the bed of any public  street,  road,  alley,
easements,  rights of way, water, water courses,  hereditaments or avenue opened
or proposed,  in front of or adjoining  said Land and  Building,  including  all
strips and gores  between  the Land and  abutting  property,  to the center line
thereof; and

                           (vi) all right, title and interest of Seller, if any,
in and to all site plans,  surveys,  soil and substrata  studies,  architectural
drawings, plans and specifications,  engineering plans and studies, floor plans,
landscape plans, operating or maintenance manuals and other plans and studies of
any kind owned by Seller, if any, with respect to the Land, the Building, or the
Personal Property ("Plans"); and

                           (vii)  all  books,  records,   promotional  material,
tenant data,  leasing material and forms, past and current rent rolls, paid bill
files, bank statements,  tax returns,  market studies, keys, and other materials
of any kind  owned  by  Seller,  if any,  which  are or may be used in  Seller's
ownership or use of the Land, the Building or the Personal  Property ("Books and
Records"); and

                           (viii) all right,  title and  interest of Seller,  if
any, in and to any and all
licenses and permits  owned or held by Seller  (including  any  certificates  of
occupancy)  to the  extent  such are  assignable  and in any way  related  to or
arising out of or used in  connection  with the  ownership  or  operation of the
Land,  the  Building  or the  Personal  Property  (collectively,  "Licenses  and
Permits"); and

                           (ix) all other rights,  privileges and  appurtenances
owned by Seller,  if any,  and in any way  related  to the rights and  interests
described above in this Section.

The  foregoing  properties,  rights  and  interests  set forth or  described  in
sub-sections (i) - (ix) of this Section 1 are hereinafter  collectively referred
to as the "Premises".


         2. DEFINITIONS OF CERTAIN TERMS.

                  For purposes of this Agreement,  unless the context  otherwise
requires:

                           "Additional   Rent"  shall  mean  any   component  of
additional  rent,  however  characterized,  under  a  Lease,  including  without
limitation,  real estate taxes, electrical charges,  utility costs and operating
expenses.
<PAGE>
                           "Appurtenances"  shall  mean  all  right,  title  and
interest,  if any, of Seller in and to any award or payment made, or to be made,
(x) for any taking in condemnation,  eminent domain or agreement in lieu thereof
of land adjoining all or any part of the Land or Building, (y) for damage to the
Land or Building or any part  thereof by reason of change of grade or closing of
any such street, road, highway or avenue, and (z) for any taking in condemnation
or eminent domain of any part of the Land or Building.

                           "Cash  Payment" is  Thirty-Four  Million Nine Hundred
and Fifty  Thousand  ($34,950,000)  Dollars,  subject to  adjustment as provided
herein.

                           "Closing" is on or about December 6, 1996 but subject
to the provisions of Section 21.

                           "Closing  Date" shall mean the date on which the deed
to the Premises shall be delivered and title thereto conveyed to Purchaser.

                           "Deed"  shall  mean a  bargain  and  sale  deed  with
covenants in proper  statutory  form for  recording so as to convey to Purchaser
good and marketable  title to the fee simple of the Premises,  free and clear of
all liens and encumbrances, except the Permitted Encumbrances.

                           "Deposit"   is  Two   Hundred   and  Fifty   Thousand
($250,000) Dollars.

                           "Element" is as defined in Section 25.

                           "Environmental  Documents"  is as  defined in Section
25.

                           "Environmental   Inspection  Period"  is  the  period
commencing on the Execution Date and ending November 29, 1996.


                           "Escrow Agent" is  Commonwealth  Land Title Insurance
Company.

                           "Estoppel Certificate" is as defined in Section 7.

                           "Execution  Date" is the date  that a fully  executed
copy of this Agreement is in the possession of counsel to Purchaser and Seller.

                           "Governmental  Authorities"  shall  mean any  agency,
board, bureau, commission, department or body of any municipal, county, state or
federal  governmental  unit, or any subdivision  thereof,  having,  asserting or
acquiring  jurisdiction  over all or any part of the Premises or the management,
operation, use or improvement thereof.

                           "Hazardous   Materials"   shall   include,    without
limitation,  gasoline,  petroleum products,  explosives,  radioactive materials,
polychlorinated  biphenyls,  asbestos or any materials containing  asbestos,  or
related or similar  materials,  or any other substance or material  defined as a
hazardous or toxic substance or waste or toxic  pollutant by any federal,  state
or local law, ordinance, rule, or regulation.


                           "Inspection  Period" is the period  commencing on the
Execution Date and ending November 8, 1996.
<PAGE>
                           "ISRA" is the Industrial Site Recovery Act,  N.J.S.A.
13:1K-6 et seq.,  the  regulations  promulgated  thereunder  and any amending or
successor legislation and regulations.

                           "ISRA Compliance Date" is as defined in Section 25.

                           "Major Facility" is as defined in the Spill Act.

                           "NJDEP" is the New Jersey Department of Environmental
Protection.

                           "Permitted Encumbrances" is as defined in Section 5.

                           "Premises" is as defined in Section 1.

                           "Purchase Price" is as defined in Section 4.

                           "Rent  Roll" is the rent  roll for the  Premises  set
forth in Exhibit F in the form required under Section 9(b).

                           "Security  Deposits" are those deposits  posted under
the Leases and all other  deposits,  if any,  in the  nature of  security  for a
Tenant's performance under its Lease.

                           "Service  Contracts"  shall mean those  contracts set
forth in Exhibit G.

                           "Spill  Act"  shall mean the Spill  Compensation  and
Control Act,  N.J.S.A.  58:10-23.11  et seq.,  together  with any  amendments or
revisions thereof and any regulations promulgated thereunder and any amending or
successor legislation and regulations.

                           "Tenants"  shall  mean any and all  occupants  of the
Premises as of the date hereof.

                           "Tests and Studies" is as defined in Section 3.

                           "Title Company" is Commonwealth  Land Title Insurance
Company.

                           "Title Policy" is as defined in Section 16.


         3. INSPECTION PERIOD; PURCHASER'S RIGHT OF INSPECTION PRIOR TO CLOSING

                  During the  Inspection  Period  (except as otherwise set forth
herein),  Purchaser,  at its sole expense, may perform Tests and Studies and may
inspect the physical  (including  environmental) and financial  condition of the
Premises,  including but not limited to the Leases,  contracts,  engineering and
environmental  reports,  development approval agreements,  permits and approvals
and Service  Contracts,  which  inspection shall be satisfactory to Purchaser in
its sole discretion.  Purchaser may terminate this Agreement for any reason,  by
written notice to Seller given within the Inspection Period (except as otherwise
set forth herein). In the event Purchaser  terminates this Agreement,  Purchaser
shall be entitled to the return of the Deposit with interest earned thereon, and
this  Agreement  shall be null and void and the parties hereto shall be relieved
of all further obligations hereunder except as otherwise provided herein.
<PAGE>
                  During the  Inspection  Period  (except as otherwise set forth
herein),  Purchaser,  its agents and contractors,  shall have the right to enter
upon the Premises and perform (or cause to be performed)  tests,  investigations
and studies of or related to the  Premises  including,  but not limited to, soil
borings, ground water investigation,  percolator tests, surveys,  architectural,
engineering,  subdivision,  environmental,  access, financial,  market analysis,
development and economic feasibility studies and other tests,  investigations or
studies  as  Purchaser,  in its sole  discretion,  determines  is  necessary  or
desirable  to  satisfy  Purchaser  of the  feasibility  of owning  and using the
Premises  (collectively  the "Tests and  Studies"),  provided that it shall give
Seller  notification  of its intention to conduct any such  inspection  and that
such inspection shall not  unreasonably  impede the normal  day-to-day  business
operation of the  Premises.  Such right of  inspection  and the exercise of such
right  shall  not  constitute  a  waiver  by  Purchaser  of  the  breach  of any
representation  or warranty of Seller  which might have been  disclosed  by such
inspection.

                  Notwithstanding   the   foregoing,   during  the   Environment
Inspection Period, Purchaser, its agents and contractors may continue to inspect
the environmental condition of the Premises and may have the right to enter upon
the  Premises  and  perform (or cause to be  performed)  those Tests and Studies
which relate to the environmental  condition of the Premises,  including but not
limited to, soil  borings,  ground  water  investigation,  percolator  tests and
environmental  studies,  upon the terms and conditions set forth in this Section
3, which  inspection  shall be satisfactory to Purchaser in its sole discretion.
Purchaser  may  terminate  this  Agreement  for  any  reason   relating  to  the
environmental  condition of the Premises,  by written notice to the Seller given
within the Environmental  Inspection Period. In the event that Purchaser has not
notified Seller of its intention to terminate this Agreement upon the expiration
of the  Environmental  Inspection  Period,  Purchaser  shall be  deemed  to have
terminated this Agreement and the provisions of this Section 3 shall apply.

                  Seller agrees to permit  Purchaser access to the Premises upon
prior notice to Seller for the purpose of performing  the Tests and Studies.  To
assist  Purchaser  in the  performance  of its Tests  and  Studies,  Seller  has
previously  delivered to Purchaser true and complete copies of all test borings,
environmental   reports  (including,   without  limitation,   all  Environmental
Documents),  surveys, title materials and engineering and architectural data and
the like relating to the Premises  that are in Seller's  possession or under its
control.  In the event any  additional  materials  or  information  come  within
Seller's  possession or control after the date of this  Agreement,  Seller shall
promptly submit true and complete copies of the same to Purchaser.  Seller shall
cooperate with Purchaser in facilitating the Tests and Studies and shall obtain,
at no cost or expense to Seller, any consents that may be necessary in order for
Purchaser to perform the same. Purchaser shall repair and restore any portion of
the surface of the Premises  disturbed by Purchaser,  its agents or  contractors
during the  conduct of any of the Tests and  Studies to  substantially  the same
condition as existed prior to such disturbance.

         4. PURCHASE PRICE AND TERMS OF PAYMENT.

         The purchase price for the Premises is THIRTY FIVE MILLION TWO
HUNDRED  THOUSAND  and xx/100  ($35,200,000)  Dollars  (the  "Purchase  Price"),
payable as follows:

                  (a)  Delivery  of the  Deposit  to  the  Escrow  Agent  on the
Execution Date, which shall be held pursuant to the terms of Section 23; and
<PAGE>
                  (b) The Cash Payment, by a bank,  certified or cashier's check
on the  Closing  Date or by the wiring of federal  funds to Seller or the Escrow
Agent, subject to adjustment as provided herein.


         5. MATTERS TO WHICH THIS SALE IS SUBJECT

                  The  Premises  are sold and are to be conveyed  subject to the
following (collectively the "Permitted Encumbrances"):

                  (a) The liens of real estate taxes,  personal  property taxes,
water charges, and sewer charges provided same are not due and payable;

                  (b) The rights of Tenants, as tenants only;

                  (c)  Those  restrictions,  covenants,  agreements,  easements,
matters  and  things  affecting  title to the  Premises  and  more  particularly
described  in  Exhibit  "D"  annexed  hereto and by this  reference  made a part
hereof;

                  (d) Any and all  laws,  statutes,  ordinances,  codes,  rules,
regulations,  requirements,  or  executive  mandates  as the same may be amended
subsequent  to the date  hereof  affecting  the  Premises  adopted by the United
States,  the State of New Jersey,  the  Township of  Woodcliff  Lake and any and
every other Governmental Authority having jurisdiction thereof;

                  (e) The state of facts shown on that certain  survey  prepared
by Schan  Associates  and dated  December  12, 1994 and any other state of facts
which a recent and accurate survey of the Premises would actually show, provided
same do not  impair the use of the  Premises  as an office  building  and do not
render title uninsurable at standard rates; and

                  (f) Those Service Contracts which are assumed by Purchaser, at
its option, at Closing.


         6. ADJUSTMENTS

                  (a) The following items with respect to the Premises are to be
apportioned as of midnight on the date preceding the Closing:

                           (i) Rents,  escalation  charges and percentage  rents
payable by Tenants as and when collected.  All monies received from Tenants from
and  after the  Closing  shall  belong to  Purchaser  and  shall be  applied  by
Purchaser to current rents and other charges under the Leases. After application
of such monies to current rents and charges, Purchaser agrees to remit to Seller
any  excess  amounts  paid by a Tenant to the  extent  that such  Tenant  was in
arrears in the  payment of rent prior to the  Closing,  not in excess of one (1)
month's rent. The provisions of this  subsection  6(a) shall survive the Closing
Date.

                           (ii) Utility  charges  payable by Seller,  including,
without limitation,  electricity,  water charges and sewer charges. If there are
meters on the  Premises,  Seller  will cause  readings  of all said meters to be
performed not more than five (5) days prior to the Closing Date.

                           (iii) Amounts payable under the Service Contracts, to
the extent Purchaser assumes such Service Contracts at Closing.
<PAGE>
                           (iv)  Real  estate  taxes  due and  payable  over the
calendar year. If the Closing Date shall occur before the tax rate is fixed, the
apportionment  of real estate  taxes shall be upon the basis of the tax rate for
the preceding year applied to the latest  assessed  valuation.  If subsequent to
the Closing Date, real estate taxes (by reason of change in either assessment or
rate or for any other reason) for the Premises should be determined to be higher
or lower than those that are apportioned,  a new computation  shall be made, and
Seller agrees to pay Purchaser any increase shown by such recomputation and vice
versa. The provisions of this Subsection 6(a)(v) shall survive the Closing Date.

                           (v) Income from  vending  machines,  if any,  and all
other income, if any, other than rents.

                  (b) At the Closing,  Seller shall  deliver to Purchaser a list
of the Additional  Rents billed to Tenants for the calendar year 1996 (both on a
monthly basis and in the aggregate), the basis for which the monthly amounts are
being billed and the amounts  incurred by Seller on account of the components of
Additional Rent for calendar year 1996. Upon the  reconciliation by Purchaser of
the Additional Rents billed to Tenants,  and the amounts  actually  incurred for
calendar year 1996,  Seller and Purchaser  shall be liable for  overpayments  of
Additional  Rents,  and shall be entitled to payments from Tenants,  as the case
may be, on a pro rata basis based upon each party's  period of ownership  during
calendar year 1996. To the extent that Purchaser  determines,  in its reasonable
discretion,  that any  overpayments  due to Tenants are material in light of the
amounts  actually  incurred,  Purchaser  shall be given a credit at the Closing.
Purchaser  agrees  to  remit to  Tenants  such  overpayments  as are due to each
Tenant.

                  (c)  Except  as  otherwise  provided  in this  Agreement,  the
adjustments  shall be made in  accordance  with the  customs in respect to title
closings in the State of New Jersey.

                  (d)  Any  errors  in  calculations  or  adjustments  shall  be
corrected or adjusted as soon as practicable after the Closing.

                  (e) The provisions of this Section 6 shall survive the Closing
Date.

         7. ESTOPPEL CERTIFICATES

                  (a) Seller  represents to Purchaser  that Seller has delivered
to each Tenant an estoppel certificate in the form annexed hereto as Exhibit "E"
for  Tenant's  execution,  completed to reflect the  Tenant's  particular  Lease
status.

                  (b) Seller  agrees to use its best  efforts to obtain from all
Tenants and deliver same to Purchaser (i) the estoppel  certificates referred to
in subsection 7(a), or at a minimum and in satisfaction of the remainder of this
Section  7,  (ii)  estoppel  certificates  in the form in which  each  Tenant is
obligated to deliver same as provided in its Lease. All certificates referred to
in  (i)  and  (ii)  above  shall  be  collectively   referred  to  as  "Estoppel
Certificates".

                  (c) As a condition  to Closing,  Seller  shall  deliver (i) an
Estoppel  Certificate  from each Tenant  which is leasing  demised  space in the
Premises of 10,000 square feet or more and (ii) Estoppel  Certificates  from the
remaining Tenants leasing  seventy-five (75%) percent of the aggregate remaining
square footage of the Premises.
<PAGE>
                  (d) For an Estoppel  Certificate  to be deemed  delivered  for
purposes of this Agreement, it must certify that the Tenant's most recent rental
payment  under its Lease was made not more than one (1) month prior to the month
in which the Closing occurs.

                  (e) Seller  shall  deliver  its own  Estoppel  Certificate  on
behalf of each Tenant  which has failed to deliver such  certificate  on its own
behalf.


         8. ITEMS TO BE DELIVERED BY SELLER ON THE CLOSING DATE

                  On the Closing  Date,  Seller,  at its sole cost and  expense,
will deliver or cause to be delivered to Purchaser  the  following  documents in
connection  with the Premises in form and substance  reasonably  satisfactory to
Purchaser:

                  (a) The Deed duly executed and  acknowledged.  The delivery of
the Deed shall  also be deemed to  transfer  all of  Seller's  right,  title and
interest in and to the Personal Property.

                  (b) All  original  Leases and all other  documents  pertaining
thereto,  and certified  copies of such Leases or other  documents where Seller,
using its best efforts, is unable to deliver originals of same.

                  (c) All other original  documents or instruments  initialed by
or on behalf of the  parties  to this  Agreement  or  referred  to  herein,  and
certified  copies of same where  Seller,  using its best  efforts,  is unable to
deliver originals.

                  (d) A letter  to  Tenants  advising  the  Tenants  of the sale
hereunder  and  directing  that rent and other  payments  thereafter  be sent to
Purchaser or its designee, as Purchaser shall so direct.

                  (e) Duly executed and  acknowledged  assignment of all Leases,
Security  Deposits and  Intangible  Property in form  reasonably  acceptable  to
Purchaser.

                  (f) A cashier's  check to the order of Purchaser in the amount
of the Security Deposits and any prepaid rents,  together with interest required
to be paid thereon. At the election of Purchaser, such amount may be allotted to
Purchaser as a credit against the Cash Payment.

                  (g) An affidavit,  or such other  documents as required by the
Title  Company,  executed  by Seller  certifying  (i)  against  any work done or
supplies delivered to the Premises which might be grounds for a materialman's or
mechanic's  lien under or  pursuant to New Jersey  law,  in form  sufficient  to
enable the Title  Company to  affirmatively  insure  Purchaser  against any such
lien,  (ii) that the  signatures  on the Deed are  sufficient to bind Seller and
convey the Premises to  Purchaser,  (iii) the  conveyance  is not  prohibited or
restricted  in any way under the laws of the  State of New  Jersey  and (iv) the
Rent  Roll.  Seller  shall  also  deliver  a  survey  affidavit  in the form and
substance required by the Title Company.
<PAGE>
                  (h) Any and all  affidavits and other  instruments  (including
but not  limited to all  organizational  documents  of the  Seller and  Seller's
general  partner  including  limited  partnership  agreements,  certificates  of
partnership, by laws, articles of incorporation, and good standing certificates)
and  documents  which the Title  Company  shall  reasonably  require in order to
insure title to  Purchaser,  subject to no  exceptions  other than the Permitted
Encumbrances.

                  (i) The Estoppel Certificates required in Section 7.

                  (j) Plans, Books and Records.

                  (k) The  certificates  of  occupancy  for the  Building  and a
letter from the local municipal zoning  department  certifying that the Premises
complies in all respects with the current zoning ordinance.

                  (l) A Rent Roll, current as of the Closing Date,  certified by
Seller as being true and correct in all respects.

                  (m) All proper instruments as shall be reasonably required for
(i) the  conveyance of title to the  Appurtenances,  and (ii) the  assignment of
and/or collection rights to any condemnation or eminent domain claims, awards or
payments, as well as the right to claim or collect damages resulting from damage
to the  Premises  or any part  thereof  by  reason of the  changing  of grade or
closing of any street, road, highway or avenue.

                  (n) Duly executed and acknowledged assignment of those Service
Contracts which Purchaser has elected to assume in form reasonably acceptable to
Purchaser.

                  (o) A certificate signed by an officer of Seller to the effect
that  Seller is not a  "foreign  person"  as that  term is  defined  in  Section
1445(f)(3) of the Internal Revenue Code of 1986, as amended.

                  (p) All such transfer and other tax  declarations  and returns
and information returns, duly executed and sworn to by Seller as may be required
of Seller by law in connection with the conveyance of the Premises to Purchaser,
including but not limited to, Internal Revenue Service forms 1099-S and 1096.

                  (q) A  statement  setting  forth the  Purchase  Price with all
adjustments and prorations shown thereon.

                  (r) The  Seller's  closing  certificate  with  respect  to the
representations  and warranties  described in Section 9 hereof and  recertifying
that same are true and correct on the Closing Date.

                  (s) The Additional Rent list described in Section 6 hereof.


         9. SELLER'S REPRESENTATIONS AND WARRANTIES

                  In order to induce Purchaser to purchase the Premises,  Seller
hereby  warrants,  represents  and agrees that the  following are true as of the
date hereof and will be true on the Closing Date:
<PAGE>
                  (a)  Annexed  hereto as Exhibit  "C" is a true,  complete  and
correct schedule of all Leases, which Leases are valid and bona fide and are now
in full force and effect.  No defaults exist  thereunder and no condition exists
which,  with the passage of time or the giving of notice or both,  will become a
default;  the Leases  constitute  all of the leases,  tenancies  or  occupancies
affecting the Premises on the date hereof; all Tenants have commenced occupancy;
there are no  agreements  which  confer  upon any Tenant or any other  person or
entity any rights with respect to the Premises,  nor is any Tenant  entitled now
or in the future to any concession,  rebate, offset,  allowance or free rent for
any period, nor has any such claim been asserted by any Tenant.

                  (b) Annexed hereto as Exhibit "F" (the "Rent Roll") is a true,
complete  and  correct  listing of all Leases,  which sets forth:  (i) the total
number of Tenants at the  Premises;  (ii) the name of each  Tenant;  (iii) fixed
rent actually  being  collected;  (iv)  expiration  date or status of the Leases
(including  all  rights or  options  to  renew);  (v)  Security  Deposits;  (vi)
arrangements  under  which any Tenant is  occupying  space on the date hereof or
will in the future,  occupy such space; (vii) any notices given by any Tenant of
an intention to vacate space in the future; and (viii) the base year(s) and base
year amounts for all items of rent or  additional  rent billed to each Tenant on
that basis.  Seller has performed all of the obligations and observed all of the
covenants required of the landlord under the terms of the Leases.

                  (c)  All  work,  alterations,  improvements  or  installations
required to be made for or on behalf of all Tenants under the Leases have in all
respects  been  carried  out,  performed  and  complied  with,  and  there is no
agreement  with any  Tenant  for the  performance  of any work to be done in the
future.  No work has been  performed  at the  Premises  which  would  require an
amendment to the certificate of occupancy, and any and all work performed at the
Premises  to the date  hereof  and to the  Closing  Date has been and will be in
accordance with the rules,  laws and regulations of all applicable  authorities.
All bills and claims for labor  performed and materials  furnished to or for the
benefit of the Premises will be paid in full on the Closing Date.

                  (d)  There  are  no  service   contracts,   union   contracts,
employment  agreements  or  other  agreements  affecting  the  Premises  or  the
operation  thereof,  except the Service Contracts.  True,  accurate and complete
copies of the Service  Contracts have been initialed by the parties.  All of the
Service  Contracts  are and will on the Closing Date be  unmodified  and in full
force and effect  without  any default or claim of default by any of the parties
thereto.  All sums  presently  due and  payable  by  Seller  under  the  Service
Contracts have been fully paid and all sums which become due and payable between
the date hereof and the Closing Date shall be fully paid on the Closing Date.

                  (e) There are no actions, suits, labor disputes, litigation or
proceedings currently pending or, to the knowledge of Seller, threatened against
or  related  to Seller or to all or any part of the  Premises  or the  operation
thereof, nor does Seller know of any basis for any such action.

                  (f) There are no outstanding  requirements or  recommendations
by (i) the insurance company(s) which issued the insurance policies insuring the
Premises;  (ii) any board of fire underwriters or other body exercising  similar
functions,  or (iii) the holder of any mortgage,  which require or recommend any
repairs or work to be done on the Premises.

                  (g) No Tenants  are in arrears for the payment of rent for any
month preceding the month of the date of this Agreement, nor has Seller received
notice of an  intention  to vacate from any Tenant,  except as noted on the Rent
Roll.
<PAGE>
                  (h) The  Seller  has  received  no  written  notice and has no
knowledge  of  (i)  any  pending  or  contemplated  annexation  or  condemnation
proceedings,  or private purchase in lieu thereof, affecting or which may affect
the Premises,  or any part thereof,  (ii) any proposed or pending  proceeding to
change or redefine the zoning classification of all or any part of the Premises,
(iii) any proposed or pending special assessments  affecting the Premises or any
portion thereof,  (iv) any penalties or interest due with respect to real estate
taxes assessed  against the Premises and (v) any proposed  change(s) in any road
or grades with  respect to the roads  providing a means of ingress and egress to
the Premises.  Seller agrees to furnish Purchaser with a copy of any such notice
received within two (2) days after receipt.

                  (i) Seller has provided Purchaser with all reports in Seller's
possession  or under  its  control  related  to the  physical  condition  of the
Premises and all Books and Records  necessary  for  Purchaser to conduct its due
diligence and Tests and Studies.

                  (j)  Seller  has  no  knowledge  of  any  notices,  suits,  or
judgments  relating to any  violations  (including  environmental)  of any laws,
ordinances  or  regulations   affecting  the  Premises,  or  any  violations  or
conditions  that may give rise  thereto  and has no reason to  believe  that any
Governmental Authorities contemplates the issuance thereof.

                  (k) There are no employees  working at or in  connection  with
the Premises.  There is currently no union agreement  affecting the Premises and
none will be in effect on the Closing Date.

                  (l) Annexed hereto as Exhibit "I" is a schedule of all leasing
commission  obligations  affecting the Premises.  The respective  obligations of
Seller and Purchaser with respect to said  commissions  are set forth in Section
14.

                  (m)  Seller  (A)  is a duly  organized  and  validly  existing
corporation under the laws of the State of New Jersey, and is duly authorized to
transact  business in the State of New Jersey;  (B) has all requisite  power and
authority  to execute and deliver this  Agreement  and all other  documents  and
instruments  to be executed and  delivered by it  hereunder,  and to perform its
obligations hereunder and under such other documents and instruments in order to
sell the Premises in  accordance  with the terms and  conditions  hereof and all
necessary actions of the stockholders and board of directors of Seller to confer
such power and  authority  upon the persons  executing  this  Agreement  and all
documents  which are  contemplated  by this  Agreement  on its behalf  have been
taken.

                  (n) This Agreement,  when duly executed and delivered, will be
the legal,  valid and binding  obligation of Seller,  enforceable  in accordance
with  the  terms of this  Agreement.  Seller's  performance  of its  duties  and
obligations under this Agreement and the transfer documents  contemplated hereby
will not conflict with, or result in a breach of or default under, any provision
of  any of  Seller's  organizational  documents,  any  agreements,  instruments,
decrees, judgments,  injunctions,  orders, writs, laws, rules or regulations, or
any  determination  or award of any court or  arbitrator,  to which  Seller is a
party or by which its assets are or may be bound.

                  (o)  No  petition  in  bankruptcy  (voluntary  or  otherwise),
assignment for the benefit of creditors,  or petition seeking  reorganization or
arrangement or other action under Federal or State bankruptcy laws is pending or
threatened against, or contemplated by Seller.
<PAGE>
                  (p) No person, firm, or entity has any rights in, or rights to
acquire all or any part of the Premises.

                  (q) The Personal Property is now owned and will on the Closing
Date be owned by Seller free and clear of any conditional bills of sale, chattel
mortgages,  security  agreements  or  financing  statements  or  other  security
interests of any kind.

All  representations  and warranties  provided by Seller in this Agreement shall
survive the Closing Date for a period of one (1) year and shall not be merged in
the delivery of the Deed. Seller agrees to indemnify and hold Purchaser harmless
against all claims,  liabilities,  losses,  deficiencies  and damages as well as
reasonable  expenses  (including  attorney's  fees),  and interest and penalties
related  thereto,  asserted by any third party against or incurred by Purchaser,
by  reason  of or  resulting  from any  breach,  inaccuracy,  incompleteness  or
nonfulfillment  of the  covenants,  representations  and  warranties  of  Seller
contained in this Agreement.

         10.SELLER'S COVENANTS

                  10.1 Seller  covenants and agrees that between the date hereof
and the Closing Date it shall perform or observe the  following  with respect to
the Premises:

                  (a) Seller,  as  landlord,  will not enter into any new leases
with respect to the Premises,  or renew or modify any Lease, without Purchaser's
prior written consent.

                  (b) If prior to the Closing  Date Seller  shall have  received
from  (i) any  insurance  company  which  issued a policy  with  respect  to the
Premises,  (ii) any board of fire underwriters or other body exercising  similar
functions,  or (iii)  the  holder  of any  mortgage,  any  notice  requiring  or
recommending any repair work to be done on the Premises, Seller will do the same
expeditiously  and  diligently  at its own cost and expense prior to the Closing
Date.

                  (c) Seller  will  operate  and  maintain  the  Premises in the
ordinary  course of business and use reasonable  efforts to reasonably  preserve
for  Purchaser  the  relationships  of Seller and Seller's  Tenants,  suppliers,
managers,  employees and others having on-going relationships with the Premises.
Seller will  complete any capital  expenditure  program  currently in process or
anticipated  to be  completed.  Seller  will not defer  taking  any  actions  or
spending any of its funds, or otherwise manage the Premises differently,  due to
the pending sale of the Premises.

                  (d) Seller shall not:

                           (i) Enter into any agreement  requiring  Seller to do
work for any Tenant  after the Closing Date without  first  obtaining  the prior
written consent of Purchaser; or

                           (ii) Accept the surrender of any Service  Contract or
Lease, or grant any concession, rebate, allowance or free rent.

                  (e) Seller shall not,  between the date hereof and the Closing
Date,  apply  any of such  Security  Deposits  with  respect  to any  Tenant  in
occupancy on the Closing Date.
<PAGE>
                  (f) Between the date hereof and the Closing Date,  Seller will
not  renew,  extend or modify any of the  Service  Contracts  without  the prior
written consent of the Purchaser in each instance first had and obtained. At the
Closing,  Seller will cancel or will have previously cancelled (effective on the
Closing Date) all Service  Contracts  except those which Purchaser has agreed in
writing to assume, with all cancellations at Seller's sole cost and expense.

                  (g) Seller shall not remove any Personal Property as set forth
in Exhibit  "B"  annexed  hereto,  fixtures  or  equipment  located in or on the
Premises, except as may be required for repair and replacement. All replacements
shall be free and clear of liens and  encumbrances  and shall be of  quality  at
least  equal to the  replaced  items and shall be deemed  included in this sale,
without cost or expense to Purchaser.

                  (h) Seller shall,  upon request of Purchaser at any time after
the date  hereof,  assist  Purchaser  in its  preparation  of audited  financial
statements,  statements of income and expense,  and such other  documentation as
Purchaser may reasonably  request,  covering the period of Seller's ownership of
the Premises.

                  (i) Between the date hereof and the Closing Date,  Seller will
make all required payments under any mortgage  affecting the Premises within any
applicable grace period, but without reimbursement by Purchaser therefor. Seller
shall also comply with all other terms covenants, and conditions of any mortgage
on the Premises.

                  (j)  Seller  shall not cause or permit  the  Premises,  or any
interest therein, to be alienated,  mortgaged, liened, encumbered (other than by
mechanic's or materialman's  liens or claims which are removed or bonded against
prior to Closing) or otherwise be transferred.

                  (k) Up to and  including  the Closing  Date,  Seller agrees to
maintain and keep such hazard, liability and casualty insurance policies in full
force and effect in such amounts and covering such risks sufficiently to protect
the Premises and to protect,  to a reasonable and prudent  extent,  the owner of
the  Premises,  in  such  amounts  as are  required  so as not  to be  deemed  a
co-insurer,  and for actual replacement cost, against any loss, damage, claim or
liability.

                  (l)  Seller  shall  permit   Purchaser   and  its   authorized
representatives  to  inspect  the Books and  Records  of its  operations  at all
reasonable  times for a period of one (1) year  subsequent  to the Closing Date.
All Books and Records not conveyed to Purchaser  hereunder  shall be  maintained
for Purchaser's inspection at Seller's address as set forth above.

                  (m) All violations of laws, statutes, ordinances, regulations,
orders or  requirements  affecting the Premises,  whether or not such violations
are  now  noted  in the  records  of or have  been  issued  by any  Governmental
Authorities  will be complied  with by Seller and the Premises  will be conveyed
free of any such violations.

                  10.2  Seller  covenants  and  agrees  that  commencing  at the
Closing and continuing  during such time as Whiteweld,  Barrister & Brown,  Inc.
occupies space in the Building, Purchaser shall retain the right, at Purchaser's
sole discretion,  to use the name "Whiteweld Centre". Provided that Purchaser is
using  said  name,  Seller,  its  affiliates  or both shall not use said name in
competition with Purchaser.
<PAGE>
         11.CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS.

                  The  obligations  of Purchaser to purchase the Premises and to
perform the other  covenants and obligations to be performed by Purchaser on the
Closing Date shall be subject to the following  conditions  (all or any of which
may be waived, in whole or in part, by Purchaser):

                           (i) The representations and warranties made by Seller
herein shall be true and correct in all respects  with the same force and effect
as though such  representations  and  warranties  had been made on and as of the
Closing Date.

                           (ii) Seller shall have  performed  all  covenants and
obligations  undertaken  by Seller in  Section  10  hereof in all  respects  and
complied  with all  conditions  required by this  Agreement  to be  performed or
complied with by it on or before the Closing Date.

                           (iii) The Title Company is  unconditionally  prepared
to issue to  Purchaser  a Title  Policy  meeting the  requirements  set forth in
Section 17 hereof for an "insurable title".

                           (iv) Seller shall have  delivered to Purchaser all of
the documents enumerated in Section 8 hereof.

         12.EXPENSES

                  (a) Seller shall pay the fees,  costs and expenses of Seller's
counsel,  and any and all sales taxes,  transfer taxes,  documentary  stamps and
other taxes and charges imposed in connection with the delivery and recording of
the  Deed,  all  customary  prorations  and  appointments  and  one-half  of all
reasonable escrow fees.

                  (b)  Purchaser  shall pay the  fees,  costs  and  expenses  of
Purchaser's  counsel,  all title insurance  premiums and charges,  all recording
fees, all survey or surveyor  charges,  and any fees, costs or expenses incurred
by Purchaser in connection with its inspection of the Premises,  including,  but
not  limited  to, any  architects',  engineers',  accountants',  appraisers'  or
contractors'  fees or costs,  all  customary  prorations  and  appointments  and
one-half of all reasonable escrow fees.

                  (c) The  obligations of Seller and Purchaser set forth in this
Section  12  shall  survive  the  Closing  or the  earlier  termination  of this
Agreement.

         13.TAX REDUCTION AND APPEALS

                  Seller is hereby  authorized  to continue  the  proceeding  or
proceedings  now pending for the  reduction  of the  assessed  valuation  of the
Premises  as set forth on  Exhibit  "H" and to  litigate  or settle  the same in
Seller's  discretion.  Any refund  payable  on account of tax years or  portions
thereof  preceding  the Closing  shall be the  property of Seller.  Purchaser is
hereby  authorized  by  Seller,  in  Purchaser's  sole  discretion,  to file any
applicable proceeding for the 1996 fiscal year for the reduction of the assessed
valuation of the Premises. The net refund of taxes, if any, for any tax year for
which  Seller or  Purchaser  shall be entitled  to share in the refund  shall be
divided  between Seller and Purchaser in accordance  with the  apportionment  of
taxes pursuant to the provisions hereof.  All expenses in connection  therewith,
including counsel fees, shall be borne by Seller. The provisions of this Section
shall survive the Closing Date.
<PAGE>
         14. LEASING COMMISSIONS AND TENANT IMPROVEMENT OBLIGATIONS

                  All leasing commissions due on account of the original term of
all Leases made before the date of this  Agreement and  extensions  and renewals
which are  presently  effective  (but not renewals or  extensions of such leases
which are exercised after the Closing Date) shall be paid by Seller. All leasing
commissions  on account  of  extensions  or  renewals  of Leases  made after the
Closing Date shall be paid by  Purchaser.  All tenant  improvements  obligations
shall be satisfied  prior to the Closing  Date.  The  provisions of this Section
shall survive the Closing.

         15. BROKER

                  Purchaser and Seller  represent  that they have not dealt with
any brokers, finders or salesmen, in connection with this transaction, and agree
to indemnify,  defend and hold each other  harmless from and against any and all
loss, cost, damage, liability or expense,  including reasonable attorneys' fees,
which they may  sustain,  incur or be exposed to by reason of any claim for fees
or commissions. The provisions of this Section shall survive the Closing Date or
other termination of this Agreement.

         16. TITLE REPORT

                  (a)  Purchaser   agrees   promptly  after  execution  of  this
Agreement to order a report of title or title  commitment from the Title Company
and to direct the Title Company to provide Seller with a copy thereof.  It shall
be a condition to Closing that Seller transfer, and that the Title Company agree
to  insure,  title to the  Premises  in the amount of the  Purchase  Price (at a
standard rate for such  insurance) in the name of Purchaser,  after  delivery of
the Deed, by a standard 1992 ALTA Owners  Policy,  with ALTA  endorsements  Form
3.1,  Form 8.1,  Form 9 and any other  endorsements  as  required  by  Purchaser
attached,  free and clear of all liens,  encumbrances  and other matters,  other
than the Permitted  Encumbrances  (the "Title Policy").  The Title Company shall
provide  affirmative  insurance  that any Permitted  Encumbrances  have not been
violated,  and that any future violation thereof will not result in a forfeiture
or  reversion  of title and the  exception  for taxes  shall  apply  only to the
current taxes not yet due and payable.  Seller shall provide such affidavits and
undertakings as the Title Company insuring title to the Premises may require and
shall cure all other defects and  exceptions.  The words  "insurable  title" and
"insurable"  as used in this Agreement are hereby defined to mean title which is
insurable  at standard  rates  (without  special  premium) by the Title  Company
without  exception other than the Permitted  Encumbrances,  and standard printed
policy and survey  exceptions.  Seller  shall be  obligated  to expend up to the
Purchase Price to cause title to the Premises to be conveyed to Purchaser in the
manner required under this Agreement.

                  (b)  If,  at the  Closing,  Seller  is  unable  to  convey  to
Purchaser  insurable title to the Premises subject to and in accordance with the
provisions  of this  Agreement,  Seller shall be entitled,  upon written  notice
delivered to Purchaser at or prior to the Closing, to reasonable adjournments of
the Closing  Date one or more times,  for a period or periods not to exceed,  in
the  aggregate,  thirty (30) days,  to enable  Seller to convey such title or to
fulfill such obligations. If Seller does not so elect to adjourn the Closing, or
if at the  adjourned  date  Seller is still  unable to  convey  insurable  title
subject to, and in  accordance  with the  provisions  of, this  Agreement,  then
Purchaser  may, at its option,  (a) terminate  this  Agreement by written notice
<PAGE>
delivered as provided in Section 22 hereof, in which event the sole liability of
Seller shall be to direct the Title  Company to refund the Deposit with interest
thereon  to  Purchaser,  and to refund to  Purchaser  all  charges  made for (i)
examining the title, (ii) any appropriate  additional municipal searches made in
accordance with this Agreement,  and (iii) survey and survey inspection charges;
or (b) accept title to the Premises  subject to such  defect(s),  in which event
such defect(s)  shall become  Permitted  Encumbrance(s).  Upon such refund being
made to Purchaser in  accordance  with clause (a) of the  immediately  preceding
sentence,  then this Agreement shall automatically become void and of no further
force or effect,  and neither party shall have any  obligations of any nature to
the other hereunder or by reason hereof,  except obligations which,  pursuant to
the  provisions  of  this  Agreement,   are  expressly  stated  to  survive  the
termination  of this  Agreement.  If Seller  elects to  adjourn  the  Closing as
provided above,  this Agreement shall remain in effect for the period or periods
of adjournments, in accordance with its terms.

                  (c) Upon notice to Seller,  Purchaser  shall have the right to
cause one or more title  insurance  companies,  whether or not through  abstract
agencies, to insure Purchaser's title to the Premises on a co-insurance basis or
to change title companies, so long as in each instance, said company and agency,
to the extent applicable,  is a duly licensed title insurance company authorized
to conduct business in the State of New Jersey.

                  (d) Seller shall cause the surveyor to (a) certify and warrant
directly to Purchaser and to the Title Company the square footage and acreage of
the Land (to the nearest one-one hundredth (1/100)), (b) certify that the survey
is a complete  and accurate  representation  of the  Premises,  (c) certify that
there are no gores,  gaps or strips,  and such other facts that are  customarily
required by the Title  Company,  (d) provide  directly to the  Purchaser and the
Title  Company  a metes  and  bounds  description  of the Land and any  off-site
private easements benefiting the Premises,  and (e) otherwise prepare the survey
in accordance with the customary requirements of a lending institution financing
such a  transaction.  Seller shall cause the surveyor to update the survey as of
the Closing Date and shall have the general  survey  exception  removed from the
Title Policy and the survey affirmatively insured to Purchaser.

         17. CASUALTY LOSS

                  (a) If prior to the Closing  Date any part of the  Premises is
damaged as the result of fire or other casualty and the estimated cost of repair
of the damage exceeds  $100,000,  Purchaser  shall have the option to either (i)
accept  title to the  Premises  without  any  abatement  of the  Purchase  Price
whatsoever,  in which event on the Closing  Date all of the  insurance  proceeds
shall be assigned by Seller to Purchaser and any moneys theretofore  received by
Seller in  connection  with such  fire or other  casualty  shall be paid over to
Purchaser,  or (ii) cancel this  Agreement  and the  Deposit  together  with all
interest earned thereon shall be returned to Purchaser by the Escrow Agent,  and
upon such return neither party shall have any further liability or obligation to
the  other.  In the event  that the  damages  shall not  exceed  $100,000,  this
Agreement shall remain in full force and effect, the insurance proceeds shall be
assigned by Seller to Purchaser  and all sums  received by Seller in  connection
therewith  shall be paid  over to  Purchaser.  Seller  shall  maintain  adequate
insurance  on the Premises to cover the full  replacement  value of the Building
without reduction for depreciation,  including  adequate rental value insurance,
so as not to be deemed a co-insurer and for actual  replacement  costs,  with no
more than a  $100,000  deductible  and  Seller  shall  give  Purchaser  a credit
therefor on the Closing Date in case of fire or other casualty  occurring before
the Closing Date.
<PAGE>
                  (b) Seller  shall not settle any fire or casualty  loss claims
in connection  with the Premises  without  obtaining  Purchaser's  prior written
consent.

                  (c) Seller  hereby  agrees to furnish  Purchaser  with written
notification of any such fire or casualty within  twenty-four (24) hours of such
event.

         18. CONDEMNATION

                  In the event of the institution of any proceedings,  judicial,
administrative or otherwise,  which shall relate to the proposed material taking
of any portion of the Premises by eminent  domain prior to the Closing  Date, or
in the event of the  material  taking of any portion of the  Premises by eminent
domain prior to the Closing Date,  Purchaser  shall have the right and option to
terminate  this  Agreement by giving the Seller written notice to such effect at
any time after its receipt of written  notification of any such occurrence.  Any
damage to or  destruction  of the  Premises  as a result of a taking by  eminent
domain  shall be  deemed  "material"  for  purposes  of this  Section  18 if the
estimate  of the damage,  which  estimate  shall be  performed  by an  insurance
adjustor and Purchaser's architect,  shall exceed $100,000.  Should Purchaser so
terminate  this  Agreement  in  accordance  with this  Section  18, the  Deposit
together with interest earned thereon shall immediately be returned to Purchaser
by the Escrow Agent and upon such return,  neither  party shall have any further
liability or obligations to the other. In the event Purchaser shall not elect to
cancel  this  Agreement,  Seller  shall  assign all  proceeds  of such taking to
Purchaser, and same shall be Purchaser's sole property, and Purchaser shall have
the sole right to settle any claim in connection with the Premises.

         19.      REMEDIES

                  (a) In the event  Purchaser  fails to perform  on the  Closing
Date,  Purchaser's sole liability and Seller's sole recourse shall be limited to
the  amount  of the  Deposit.  Seller  agrees  that  retention  of  the  Deposit
constitutes fixed and liquidated damages resulting from Purchaser's default, and
Seller waives any other claim, at law or in equity,  either against Purchaser or
against any person, known or unknown, disclosed or undisclosed.

                  (b) (i) If, after  complying with the terms of this Agreement,
Seller  shall be unable to convey the Premises in  accordance  with the terms of
this  Agreement,  the sole obligation and liability of Seller shall be to direct
the Escrow Agent to refund to Purchaser the Deposit,  and to pay Purchaser's net
cost of examining  title,  which cost is not to exceed the charges  fixed by the
local board of title  underwriters  and  actually to be paid by  Purchaser,  and
survey charges actually to be paid by Purchaser, which charges are not to exceed
$5,000,  whereupon  this  Agreement  shall be deemed  cancelled  and the parties
hereto  shall  be  released  of  all  obligations  and  liabilities  under  this
Agreement, except those that are expressly stated to survive the cancellation or
termination of this Agreement.

                           (ii)  In the  event  of any  default  on the  part of
Seller or  Seller's  failure  to comply  with any  representation,  warranty  or
agreement in any material respect, Purchaser shall be entitled to terminate this
Agreement upon notice to Seller, in which event the Deposit shall be returned by
Escrow Agent to Purchaser  and neither party shall  thereafter  have any further
obligations  under this Agreement;  to commence an action against Seller seeking
specific performance of Seller's obligations under this Agreement; to pursue all
of its remedies at law or in equity; or to do any or all of the above.
<PAGE>
                  (c) The acceptance of the Deed by Purchaser  shall be deemed a
full performance and discharge of every agreement and obligation of Seller to be
performed  under this Agreement,  except those,  if any, which are  specifically
stated in this Agreement to survive the Closing.

         20.      ASSESSMENT

                  If, on the Closing  Date,  the  Premises  or any part  thereof
shall be or shall have been affected by an assessment or  assessments  which are
or may become payable in annual installments,  of which the first installment is
either  then a charge or lien or has been paid,  then for the  purposes  of this
Agreement all the unpaid  installments of any such  assessment,  including those
which are to become due and payable after the Closing  Date,  shall be deemed to
be due and  payable  and to be liens  upon the  Premises  and  shall be paid and
discharged by Seller on the Closing Date.

         21.      CLOSING

                  The closing and  delivery  of the Deed (the  "Closing")  shall
take place at the offices of Pryor,  Cashman,  Sherman & Flynn, 410 Park Avenue,
New York,  New York 10022 on or about the Closing  Date.  Upon notice to Seller,
Purchaser may elect to accelerate  the Closing Date to a date not less than five
(5) days after the date of Purchaser's notice.

         22.      NOTICE

                  All  notices,  demands,  requests,  or other  writings in this
Agreement provided to be given or made or sent, or which may be given or made or
sent,  by either  party  hereto to the  other or by  Escrow  Agent,  shall be in
writing  and shall be  delivered  by  depositing  the same  with any  nationally
recognized  overnight delivery service, or by telecopy or fax machine, in either
event with all transmittal  fees prepaid,  properly  addressed,  and sent to the
following addresses:

         If to Purchaser: Cali Realty Acquisition Corporation
                                   11 Commerce Drive
                                   Cranford, New Jersey  07016
                                   Attn: John J. Cali and Roger W. Thomas, Esq.
                                   (908) 272-8000 (tele.)
                                   (908) 272-6755 (fax)

         with a copy to:  Andrew S. Levine, Esq.
                                   Pryor, Cashman, Sherman & Flynn
                                   410 Park Avenue
                                   New York, New York  10022
                                   (212) 326-0414 (tele.)
                                   (212) 326-0806 (fax)

         If Seller:                Whiteweld Centre, Inc.
                                   c/o Whiteweld, Barrister & Brown, Inc.
                                   300 Tice Boulevard
                                   Woodcliff Lake, New Jersey  07675
                                   (201) 307-8957 (tele.)
                                   (201) 476-1536 (fax)
<PAGE>
         with a copy to:           Michael F. Rehill, Esq.
                                   Law Offices of Williamson & Rehill
                                   Whiteweld Centre
                                   300 Tice Boulevard
                                   Woodcliff Lake, New Jersey  07675
                                   (201) 476-1515 (tele.)
                                   (201) 476-1818 (fax)

         If to Escrow Agent:       Commonwealth Land Title Insurance Company
                                   655 Third Avenue, 11th Floor
                                   New York, New York 10017
                                   (212) 949-0100 (tele.)
                                   (212) 856-9308  (fax)

or to such other  address  as either  party may from time to time  designate  by
written  notice  to the  other  or to the  Escrow  Agent.  Notices  given by (i)
overnight  delivery  service as aforesaid shall be deemed received and effective
on the first  business day  following  such  dispatch  and (ii)  telecopy or fax
machine shall be deemed given at the time and on the date of machine transmittal
provided same is sent prior to 4:00 p.m. on a business day (if sent later,  then
notice shall be deemed given on the next  business day) and if the sending party
receives a written send  confirmation on its machine and forwards a copy thereof
by regular  mail  accompanied  by such notice or  communication.  Notices may be
given by counsel for the parties  described  above,  and such  Notices  shall be
deemed  given by  Purchaser  or  Seller,  as the case may be,  for all  purposes
hereunder.

         23.      ESCROW AGREEMENT

                  Upon the signing of this  Agreement by the parties,  Purchaser
shall  deliver  the  Deposit to the Escrow  Agent.  The  parties  agree that the
Deposit  shall be held by the  Escrow  Agent in escrow and  disposed  of only in
accordance with the provisions of this Section 23. The parties agree that if the
Deposit is cash,  such cash shall be invested in an assignable  interest-bearing
certificate  of deposit,  money  market  fund,  treasury  bill or other  similar
security  approved by Seller and Purchaser,  and all interest  accruing  thereon
shall be paid to Purchaser, except as otherwise provided herein.

                  (a) The Escrow  Agent will deliver the Deposit to Seller or to
Purchaser, as the case may be, under the following conditions:

                           (i) To Seller on the Closing Date;

                           (ii)  To  Seller  upon  receipt  of  written   demand
therefor, such demand stating that Purchaser has defaulted in the performance of
this  Agreement  and  specifically  setting  forth the  facts and  circumstances
underlying such default. The Escrow Agent shall not honor such demand until more
than five (5) days have elapsed after the Escrow Agent has mailed a copy of such
demand to Seller or Purchaser,  as the case may be, nor thereafter if the Escrow
Agent  shall  have  received  written  notice of  objection  from  Purchaser  in
accordance with the provisions of clause (b) of this Section 23; or
<PAGE>
                           (iii) To  Purchaser  upon  receipt of written  demand
therefor,  such  demand  stating  that this  Agreement  has been  terminated  in
accordance  with  the  provisions   hereof,  or  Seller  has  defaulted  in  the
performance  of this  Agreement,  and  specifically  setting forth the facts and
circumstances  underlying the same. The Escrow Agent shall not honor such demand
until more than five (5) days have  elapsed  after the Escrow Agent has mailed a
copy of such demand to Seller or Purchaser,  as the case may be, nor thereafter,
if the Escrow Agent shall have  received  written  notice of objection  from the
other party in accordance with the provisions of clause (b) of this Section 23.

                  (b) Upon the  filing of a written  demand  for the  Deposit by
Purchaser or Seller,  pursuant to subclause  (ii) or (iii) of clause (a) of this
Section 24, the Escrow  Agent shall  promptly  mail a copy  thereof to the other
party.  The other  party  shall have the right to object to the  delivery of the
Deposit by filing  written notice of such objection with the Escrow Agent at any
time  within  five  (5) days  after  the  mailing  of such  copy to it,  but not
thereafter.  Such notice shall set forth the basis for objecting to the delivery
of the Deposit.  Upon receipt of such  notice,  the Escrow Agent shall  promptly
mail a copy thereof to the party who filed the written demand.

                  (c) In the event the  Escrow  Agent  shall have  received  the
notice of objection provided for in clause (b) above and within the time therein
prescribed,  the Escrow Agent shall  continue to hold the Deposit  until (i) the
Escrow Agent  receives  written  notice from Seller and Purchaser  directing the
disbursement  of said  Deposit,  in which  case,  the  Escrow  Agent  shall then
disburse said Deposit in accordance with said direction, or (ii) in the event of
litigation  between  Seller and  Purchaser,  the Escrow Agent shall  deliver the
Deposit to the Clerk of the Court in which said litigation is pending,  or (iii)
the Escrow  Agent takes such  affirmative  steps as the Escrow Agent may, in the
Escrow  Agent's  reasonable  opinion,  elect in order to  terminate  the  Escrow
Agent's duties  including,  but not limited to,  depositing the Deposit with the
Court and bringing an action for interpleader,  the costs thereof to be borne by
whichever of Seller or Purchaser is the losing party.

                  (d) The  Escrow  Agent  may act upon any  instrument  or other
writing  believed  by it in  good  faith  to be  genuine  and to be  signed  and
presented by the proper person and it shall not be liable in connection with the
performance  of any duties  imposed upon the Escrow Agent by the  provisions  of
this Agreement, except for damage caused by the Escrow Agent's own negligence or
willful  default.  The Escrow  Agent  shall  have no duties or  responsibilities
except  those set  forth  herein.  The  Escrow  Agent  shall not be bound by any
modification  of this  Agreement,  unless the same is in  writing  and signed by
Purchaser and Seller,  and, if the Escrow Agent's duties hereunder are affected,
unless the Escrow Agent shall have given prior written consent  thereto.  In the
event that the Escrow Agent shall be uncertain as to the Escrow  Agent's  duties
or rights  hereunder,  or shall receive  instructions  from  Purchaser or Seller
which, in the Escrow Agent's opinion, are in conflict with any of the provisions
hereof,  the  Escrow  Agent  shall be  entitled  to hold and apply  the  Deposit
pursuant  to clause  (c) above and may  decline  to take any other  action.  The
Escrow Agent shall not charge a fee for its services as escrow agent.

         24.      ASSIGNMENT.

                  Purchaser shall have the right, at its sole option,  to assign
its rights hereunder to an affiliate of Purchaser upon written notice to Seller.
No assignment shall relieve Purchaser of its obligations hereunder.
<PAGE>
         25.      ENVIRONMENTAL REPRESENTATIONS

         A.  Seller  represents  and  warrants  that (a) there are no  Hazardous
Materials on or at the Premises,  except those in compliance with all applicable
federal, state and local laws, ordinances,  rules and regulations;  (b) no owner
or occupant  nor any prior owner or occupant of the  Premises  has  received any
notice or advice from any Governmental  Authority or any source  whatsoever with
respect to  Hazardous  Materials  on, from or  affecting  the  Premises;  (c) no
portion  of the  Premises  has ever been used by  Seller  or any  former  owner,
occupant or operator to generate,  manufacture,  refine,  produce, treat, store,
handle, dispose of, transfer, process or transport Hazardous Materials,  whether
or not any of those parties has received notice or advice from any  Governmental
Authority or other source with respect  thereto;  (d) no portion of the Premises
is now,  or has ever been used as a "Major  Facility,"  and Seller has not used,
and does not intend to use, any portion of the Premises  for that  purpose;  and
(e) Hazardous  Materials have not been  transported from the Premises to another
location which is not in compliance with all applicable federal,  state or local
environmental laws,  regulations or permit  requirements.  Seller covenants that
the Premises has been kept free of Hazardous  Materials,  and neither Seller nor
any occupant of the Premises has used,  transported,  stored,  disposed of or in
any manner dealt with Hazardous Materials on the Premises,  except in compliance
with all  applicable  federal,  state  and  local  laws,  ordinances,  rules and
regulations.  Seller has complied with, and ensures  compliance by all occupants
of the Premises with, all applicable federal,  state and local laws, ordinances,
rules and  regulations,  and has kept the  Premises  free and clear of any liens
imposed pursuant to such laws,  ordinances,  rules or regulations.  In the event
that Seller  receives any notice or advice from any  governmental  agency or any
source whatsoever with respect to Hazardous  Materials on, from or affecting the
Premises, Seller shall immediately notify Purchaser.

         B. Seller represents and warrants that no lien has been attached to the
Premises  as a result  of any  action  by the  Commissioner  of the NJDEP or its
successor or its designee pursuant to the New Jersey Spill  Compensation Fund as
such term is defined in the Spill Act expending monies from said fund to pay for
"cleanup and removal  costs" or "natural  resources"  damages as a result of any
"discharge" of any "hazardous  substances" on or at the Premises,  as such terms
are defined in the Spill Act.  Seller further  represents,  covenants and agrees
that  Seller has not in the past,  and does not now own,  operate or control any
Major Facility or any hazardous or solid waste disposal facility.

         C.   Notwithstanding   anything  to  the  contrary  contained  in  this
Agreement, the obligation of the Purchaser to pay the Cash Payment and otherwise
close  title  to the  Premises  on the  Closing  Date  shall be  subject  to the
condition that Seller obtain a Letter of Non-Applicability pursuant to ISRA from
the Industrial Site Evaluation Element or its successor  (hereinafter called the
"Element")  of the NJDEP,  on or before the date  (hereinafter  called the "ISRA
Compliance  Date"),  that is thirty (30) days after the Execution  Date. If this
condition is not  satisfied  on or before the ISRA  Compliance  Date,  Purchaser
shall have the right to extend the ISRA  Compliance  Date or to  terminate  this
Agreement,  in which event this Agreement shall be rendered null and void and of
no further force or effect,  Seller shall promptly  reimburse  Purchaser for the
costs of obtaining  its title  search,  appraisal and any survey of the Premises
obtained by  Purchaser,  the Deposit shall  promptly be paid to  Purchaser,  and
neither party shall have any further  liability or obligation to the other under
or by virtue of this Agreement.
<PAGE>
         D.  Seller  shall  provide  Purchaser  with all  information,  reports,
studies and analysis which Seller delivered to the NJDEP for the application and
issuance of the Letter of Non-Applicability.

         E. For purposes of this Agreement,  the term "Environmental  Documents"
shall  mean all  environmental  documentation  in the  possession  or under  the
control of Seller  concerning  the Premises or its environs  including,  without
limitation,  all sampling plans, cleanup plans, preliminary assessment plans and
reports,  site  investigation  plans and  reports,  remedial  investigation  and
reports, remedial action plans and reports or the equivalent,  sampling results,
sampling result quality assurance/quality control documentation,  correspondence
to or from  the  Element  or any  other  municipal,  county,  state  or  federal
Governmental  Authority,  submissions  to the  Element  or any other  municipal,
county,  state  or  federal  Governmental  Authority  and  directives,   orders,
approvals  and  disapprovals  issued by the  Element  or any other  Governmental
Authority.   Within  five  (5)  days  from  the  date  of  this  Agreement,  and
subsequently promptly upon receipt by Seller or Seller's representatives, Seller
shall  deliver to  Purchaser:  (i) all  Environmental  Documents  concerning  or
generated by or on behalf of  predecessors  in title or former  occupants of the
Premises;  (ii) all  Environmental  Documents  concerning  or generated by or on
behalf  of  Seller,   whether  currently  or  hereafter   existing;   (iii)  all
Environmental  Documents  concerning  or generated by or on behalf of current or
future occupants of the Premises,  whether currently or hereafter existing;  and
(iv) a description of all known operations,  past and present, undertaken at the
Premises,  and  existing  maps,  diagrams  and  other  Environmental   Documents
designating the location of past and present operations at the Premises and past
and present storage of hazardous or toxic  substances,  pollutants or wastes, or
fill  materials,  above or below ground,  in, on, under or about the Premises or
its environs.

         F. Seller shall notify  Purchaser in advance of all meetings  scheduled
between  Seller  or  Seller's  representatives  and  NJDEP  and  Purchaser,  and
Purchaser's  representatives shall have the right, without obligation, to attend
and participate in all such meetings.

         G. Seller shall indemnify,  defend and hold harmless Purchaser from and
against all claims, liabilities,  losses, damages, penalties and costs, foreseen
or unforeseen including, without limitation, counsel, engineering,  attorney and
other professional or expert fees, which Purchaser may incur, resulting directly
or  indirectly,  wholly  or  partly,  from any  misrepresentation  or  breach of
warranty by Seller or by reason of Seller's  action or non-action with regard to
Seller's obligation under this Section 26.

         H.       This Section 25 shall survive Closing.


         26. MISCELLANEOUS

                  (a) If any  instrument  or  deposit is  necessary  in order to
obviate a defect in or  objection or exception  to title,  the  following  shall
apply:  (i) any such  instrument  shall be in such form and shall  contain  such
terms and conditions as may be required by the Title Company to omit any defect,
objection or exception  to title,  (ii) any such deposit  shall be made with the
Title Company,  and (iii) Seller agrees to execute,  acknowledge and deliver any
such instrument and to make any such deposit.

                  (b) This Agreement  constitutes the entire  agreement  between
the  parties  and  incorporates  and  supersedes  all  prior   negotiations  and
discussions between the parties.
<PAGE>

                  (c) This  Agreement  cannot be amended,  waived or  terminated
orally, but only by an agreement in writing signed by the party to be charged.

                  (d) This Agreement  shall be  interpreted  and governed by the
laws of the State of New Jersey and shall be binding upon the parties hereto and
their respective successors and assigns.

                  (e) Whenever in this  Agreement  there is a provision  for the
return of the  Deposit,  the  provision  shall be deemed to include all interest
earned thereon and paid to Purchaser.

                  (f) The caption headings in this Agreement are for convenience
only  and  are not  intended  to be part of  this  Agreement  and  shall  not be
construed to modify,  explain or alter any of the terms, covenants or conditions
herein contained.

                  (g) If any term,  covenant or condition  of this  Agreement is
held to be invalid,  illegal or  unenforceable  in any respect,  this  Agreement
shall be construed without such provision.

                  (h) Each party shall, from time to time, execute,  acknowledge
and deliver such further  instruments,  and perform such additional acts, as the
other party may  reasonably  request in order to  effectuate  the intent of this
Agreement.  Nothing  contained in this  Agreement  shall be deemed to create any
rights or  obligations  of  partnership,  joint  venture or similar  association
between  Seller  and  Purchaser.  This  Agreement  shall  be  given  a fair  and
reasonable construction in accordance with the intentions of the parties hereto,
and without regard to or aid of canons  requiring  construction  against Seller,
Purchaser or the party whose counsel drafted this Agreement.

                  (i) This  Agreement  shall not be effective  or binding  until
such time as it has been  executed  and  delivered by all parties  hereto.  This
Agreement may be executed by the parties  hereto in  counterparts,  all of which
together shall constitute a single Agreement.
<PAGE>
         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the day and year first above written.

                                            PURCHASER

                                            CALI REALTY ACQUISITION CORPORATION


                                             By: /s/ Roger W. Thomas
                                                 -------------------
                                           Name: Roger W. Thomas
                                          Title: Vice President



                                            SELLER

                                            WHITEWELD CENTRE, INC.


                                             By: /s/ James J. Bovino
                                                 -------------------
                                           Name: James J. Bovino
                                          Title: President



         The undersigned  joins in the execution of the Agreement solely for the
purpose of  acknowledging  the receipt of the Deposit and its  agreement to hold
the Deposit in escrow in accordance with the terms hereof.

ESCROW AGENT


   By:/s/ William N. Deary 
      --------------------
 Name: William N. Deary
Title: Vice President






 


                                  EXHIBIT 10.53

<PAGE>
                               FIRST AMENDMENT TO
                               PURCHASE AGREEMENT

         FIRST AMENDMENT TO PURCHASE  AGREEMENT (this  "Amendment")  dated as of
December  10,  1996,  by  and  between  WHITEWELD  CENTRE,  INC.,  a New  Jersey
corporation  having an office c/o Whiteweld,  Barrister & Brown,  Inc., 300 Tice
Boulevard,  Woodcliff  Lake,  New  Jersey  07675  ("Seller"),  and  CALI  REALTY
ACQUISITION CORPORATION,  a Maryland corporation having an office at 11 Commerce
Drive, Cranford, New Jersey 07016 ("Purchaser").

                              W I T N E S S E T H :

         WHEREAS,  Seller and  Purchaser  have entered  into a certain  Purchase
Agreement  dated  October 11, 1996 (the  "Agreement"),  pursuant to which Seller
agreed to sell and Purchaser  agreed to purchase the property  commonly known as
Whiteweld Centre, 300 Tice Boulevard,  Woodcliff Lake, New Jersey, as more fully
described in the Agreement (the "Premises"); and

         WHEREAS,  Seller and  Purchaser  have agreed to amend the  Agreement as
hereinafter set forth.

         NOW, THEREFORE, in consideration of Ten ($10.00) and 00/100 Dollars and
the mutual  covenants and agreements  hereinafter set forth, and intending to be
legally bound hereby, it is hereby agreed by the parties as follows:


         1. The  Purchase  Price  is  hereby  reduced  by Two  Hundred  Thousand
($200,000) Dollars to Thirty Five Million ($35,000,000) Dollars.


         2. (a)  Purchaser  has  advised  Seller that in addition to the leasing
commissions  reflected on Schedule "J" to the Agreement,  there is an additional
leasing commission (the "Cushman  Commission") which is the obligation of Seller
in accordance  with Section 14 of the  Agreement,  due to Cushman & Wakefield of
New Jersey,  Inc.  ("Cushman") in connection with the Lease dated April 13, 1992
between Seller and Integral Systems, Inc. In addition, the agreement pursuant to
which the leasing  commission  due Strategic  Alliance,  which  commission  (the
"Strategic Commission") is set forth on Schedule "J" of the Agreement,  provides
that the full amount of said commission becomes immediately due and payable upon
a sale of the Premises. Seller hereby agrees that the Strategic Commission shall
be paid to Strategic Alliance at the Closing and the Cushman Commission shall be
paid to Cushman at the  Closing,  and  Purchaser  is hereby  entitled to pay the
Strategic  Commission to Strategic Alliance or its designee against a receipt of
same and to pay the  Cushman  Commission  to Cushman or its  designee  against a
receipt of same, in each event to be paid out of Seller's funds.


            (b)  Seller  shall  provide   Purchaser  with  evidence  at  Closing
reasonably  satisfactory  to Purchaser  that the commission due to CB Commercial
Real Estate Group in Connection  with the Lease dated  December 15, 1992 between
Seller and Comdisco  Inc. and to Jacobson,  Goldfarb and Tanzman  Associates  in
connection  with the Lease  dated May 25,  1994,  between  Seller and Chase Home
Mortgage Company have been fully paid.
<PAGE>
         3. (a) Seller has agreed that  certain  work is to be  performed at the
Premises  following  the  Closing  for which it shall be liable.  Said work (the
"Property  Repairs") and the estimated  dollar amount  required to complete each
item of work (the  "Allocated  Amounts")  are set forth on Exhibit  3(a) annexed
hereto. At Closing,  Seller shall deposit with Pryor,  Cashman,  Sherman & Flynn
(the "Escrowee")  pursuant to an escrow agreement executed at Closing the sum of
One Hundred Twenty-Six  Thousand  ($126,000)  Dollars (the "Repair Escrow").  No
later than three (3) days following Closing, and subject to the requirements set
forth in this Section 3(a), Seller shall commence the Property Repairs and shall
complete  same within  thirty  (30) days  thereafter  except for those  Property
Repairs  that can not  reasonably  be  completed  within  thirty (30) days.  The
Property Repairs shall be diligently  pursued,  shall be performed in a good and
workmanlike manner, and shall be completed with new, first class materials.  The
Property Repairs shall be deemed  completed upon the approval of Purchaser,  and
upon the delivery to Purchaser of evidence  reasonably  satisfactory  to it that
all of the parties  performing said repairs have been paid in full, that none of
said  parties have any right to file a lien against the Premises for any purpose
and that any permits or licenses  necessary  to evidence the  acceptance  of the
Property  Repairs by any applicable  governmental  authorities have been issued.
Upon completion of each of the Property  Repairs as required  herein,  Purchaser
shall  direct  Escrowee  to  release  to Seller  the  Allocated  Amount for said
Property Repair from the Repair Escrow.


            (b) Prior to commencing  any of the Property  Repairs,  Seller shall
obtain Purchaser's  approval of any plans,  specifications or other construction
program for, and the parties  performing,  the Property  Repairs,  shall provide
Purchaser with evidence of such insurance as Purchaser reasonably requires,  and
shall coordinate the Property Repairs with Purchaser. Seller hereby indemnifies,
defends and holds harmless  Purchaser from any and all losses,  costs,  damages,
expenses  (including  reasonable  attorney's fees) or claims which Purchaser may
incur on  account of the  Property  Repairs  or the  failure to perform  same in
accordance with this Amendment.  In the event that Seller requires access to any
of the space  occupied  by  tenants at the  Premises  to  perform  the  Property
Repairs, said access shall be subject to the rights of said tenants.


            (c) In the event that the Property  Repairs are not completed in the
manner  and  within the time  frame set forth  above,  Purchaser  shall have the
right,  but  not  the  obligation,  to  commence  and  complete  same  and to be
reimbursed  from the  Repair  Escrow,  upon  demand,  for all of its  costs  and
expenses incurred on account thereof.

         4. (a) Prior to closing, Seller shall have entered into a five (5) year
lease with Town & Country  Developers,  Inc.  ("T&C") for an  aggregate of 5,776
square  feet at an  annual  rental  rate of  $24.00  per  square  foot (the "T&C
Lease").  The form of the T&C Lease shall be reasonably  acceptable to Purchaser
and shall include among other things,  the following terms and  conditions:  T&C
shall  not be  permitted  to sublet  the  premises  demised  under the T&C Lease
without  the  Landlord's  prior  written  consent,  which  consent  shall not be
unreasonably  withheld  or  delayed;  Landlord  shall be entitled to collect any
incremental income, however characterized,  received from a subtenant or upon an
assignment  of the  lease;  and all costs of  tenant  improvements  and  leasing
commissions in connection with a sublet shall be borne by T&C.
<PAGE>
            (b) In  addition,  at  Closing,  T&C shall  deliver to  Purchaser  a
guaranty  of T&C's  obligations  under the T&C Lease by James J.  Bovino,  which
guaranty shall be in form and substance satisfactory to Purchaser.

         5. (a) Seller,  for its own account and on behalf of others,  is in the
process  of  obtaining  approvals  for  the  construction  of  a  heliport  (the
"Heliport") on a portion of the Premises shown on the site plan attached  hereto
as Exhibit 6(a). Purchaser hereby consents to Whiteweld, Barrister & Brown, Inc.
("WBB")  continuing to pursue said  approvals on behalf of Seller and such other
parties,  provided that any submissions be delivered to Purchaser prior to their
submission to the relevant  governmental  authorities for  Purchaser's  approval
(Seller  hereby  representing  and  warranting  that none of the  submissions or
approvals to date have imposed any  obligations  on the owner of the  Premises),
not to be  unreasonably  withheld or denied,  and  provided,  further,  that any
conditions,  requirements or limitations on the  development,  construction  and
operation of the Heliport shall  similarly be subject to  Purchaser's  approval,
not to be  unreasonably  withheld  or  denied.  If  Purchaser  shall  accept the
approvals for the Heliport, then WBB agrees to construct the Heliport at no cost
or expense to Purchaser  and subject to the  requirements  set forth below.  WBB
agrees  to keep  Purchaser  informed  on the  status of the  approvals,  and any
meetings or hearings with regard to the approvals.

            (b) Any work in connection  with the  development or construction of
the Heliport (the  "Heliport  Construction")  shall be commenced  promptly after
acceptance  of the approvals by Purchaser,  shall be continued  diligently,  and
shall be completed lien-free,  in a good and workmanlike manner using new, first
class materials. Prior to commencing the Heliport Construction, WBB shall obtain
Purchaser's approval of any plans,  specifications or other construction program
for,  and the parties  performing,  the  Heliport  Construction,  shall  provide
Purchaser with evidence of such insurance as Purchaser reasonably requires,  and
shall  coordinate  the  Heliport   Construction   with  Purchaser.   WBB  hereby
indemnifies,  defends  and holds  harmless  Purchaser  from any and all  losses,
costs, damages,  expenses (including reasonable attorney's fees) or claims which
Purchaser  may incur on account of the Heliport  Construction  or the failure to
perform same in accordance  with this Amendment.  WBB shall reimburse  Purchaser
for its reasonable costs in supervising and inspecting the Heliport Construction
from time to time.

            (c)  At  Purchaser's  election,  made  at any  time,  WBB  shall  be
obligated to post a bond or other evidence of security satisfactory to Purchaser
in its  discretion,  both as to amount and surety,  to insure  completion of the
Heliport Construction in the manner required herein.

            (d) In the event that the  approvals  are granted  and the  Heliport
Construction is completed,  the Heliport may not be used until such time as WBB,
Purchaser and Medco Containment Services, Inc. ("Medco") shall have entered into
an agreement  reasonably  acceptable to Purchaser  providing that so long as WBB
and Medco are tenants at the Premises,  such parties shall have a "preferential"
use of the Heliport,  and that Purchaser  shall have  substantially  similar use
rights. Purchaser shall also have the right to grant other parties the rights to
use the Heliport.

         6. In the event of any conflict or inconsistency  between the terms and
conditions of this Amendment and the terms and conditions of the Agreement,  the
terms and  conditions  of this  Amendment  shall govern and  control.  All other
terms,  conditions and provisions of the Agreement  shall continue in full force
and effect and unmodified.
<PAGE>
         7. Capitalized  terms used and not otherwise  defined herein shall have
the meanings respectively assigned to them in the Agreement.

         8. This Amendment shall be binding upon and inure to the benefit of the
successors, legal representatives, heirs and assigns of the parties hereto. This
Amendment  represents  the entire  agreement  of the parties with respect to the
matters  addressed  herein,  and may not be  amended  except  upon  the  written
agreement of both of the parties hereto.

         9. This Amendment may be executed by facsimile signatures in any number
of counterparts, each of which shall be deemed an original and all of which when
considered together shall be one and the same document.

                  IN WITNESS  WHEREOF,  the parties  hereto have  executed  this
Amendment as of the day and year first above written.


                                                WHITEWELD CENTRE, INC., Seller


                                                By: /s/ James J. Bovino 
                                                    --------------------
                                              Name: James J. Bovino
                                             Title: President

                                                CALI REALTY ACQUISITION
                                                   CORPORATION, Purchaser


                                                By: /s/ Roger W. Thomas 
                                                    ------------------- 
                                              Name: Roger W. Thomas
                                             Title: Vice President







 


                                  EXHIBIT 10.54




<PAGE>
                                AGREEMENT OF SALE
                                    PARCEL II
                             AIRPORT BUSINESS CENTER
                              TINICUM TOWNSHIP, PA


         THIS  AGREEMENT  is made this 23rd day of October,  1996,  by and among
HENDERSON/TINICUM  PARTNERSHIP  ("H/T  Partnership"),   a  Pennsylvania  general
partnership,  INTERNATIONAL COURT II LIMITED PARTNERSHIP  ("International  Court
II, LP"), a  Pennsylvania  limited  partnership,  INTERNATIONAL  COURT III JOINT
VENTURE  ("International  Court III, JV"), a Pennsylvania  general  partnership,
WILBUR  C.  HENDERSON  &  SON  ("Henderson  &  Son"),  a  Pennsylvania   general
partnership,  and DAVID C. HENDERSON ("David  Henderson"),  an individual,  (H/T
PARTNERSHIP,  INTERNATIONAL  COURT II,  L.P.,  INTERNATIONAL  COURT  III,  J.V.,
HENDERSON & SON, AND DAVID C. HENDERSON,  are sometimes hereinafter collectively
referred to as "Sellers" and each  individually  as  "Seller"),  and CALI REALTY
ACQUISITION CORPORATION ("Buyer"), a Delaware corporation.

                                    RECITALS:

         A.  H/T   Partnership  is  the  owner  of  certain  real  property  and
improvements thereon located in Tinicum Township, Delaware County, Pennsylvania,
containing  approximately  12.7 acres of land and  improved  with a  three-story
building  consisting of  approximately  95,000 rentable square feet and commonly
known as "International  Court I", all as more fully described on Exhibit "A-1",
attached hereto and made a part hereof (the "International Court I Building").

         B. International Court II, LP is the owner of certain real property and
improvements thereon located in Tinicum Township, Delaware County, Pennsylvania,
containing  approximately  13.6  acres of land and  improved  with a  four-story
building  consisting of approximately  208,000 rentable square feet and commonly
known as "International Court II", all as more fully described on Exhibit "A-2",
attached hereto and made a part hereof (the "International Court II Building").

         C.  International  Court III, JV is the owner of certain real  property
and  improvements  thereon located in the Township of Tinicum,  Delaware County,
Pennsylvania,  containing  approximately  4 acres  of land and  improved  with a
three-story building consisting of approximately 68,000 rentable square feet and
commonly  known as  "International  Court III",  all as more fully  described on
Exhibit "A-3",  attached hereto and made a part hereof (the "International Court
III Building").

         D.  Henderson & Son and David  Henderson are the owners,  as tenants in
common,  of a certain  unimproved  parcel of land  located in Tinicum  Township,
Delaware County, Pennsylvania,  containing approximately 12.7 acres of land, all
as more fully described on Exhibit "A-4", attached hereto and made a part hereof
(the "Parcel").

         E.  International  Court I Building,  International  Court II Building,
International  Court III Building and the Parcel make up an office park commonly
known as "Parcel II, Airport Business Center".  International  Court I Building,
International Court II Building,  International Court III Building are sometimes
hereinafter  referred to collectively as, the "Buildings" and individually as, a
"Building".  (References  to lot size for the  Buildings  and the Parcel are for
description only and are not representations as to actual size and dimension.)

         F. H/T  Partnership  desires  to sell to Buyer,  and Buyer  desires  to
purchase from H/T Partnership, the International Court I Building.
<PAGE>
         G.  International  Court  II,  LP  desires  to sell to Buyer  and Buyer
desires to purchase from International  Court II, LP, the International Court II
Building.

         H.  International  Court  III,  JV  desires  to sell to Buyer and Buyer
desires to purchase from  International  Court III, JV, the International  Court
III Building.

         I.  Henderson & Son and David  Henderson  desire to sell to Buyer,  and
Buyer desires to purchase from Henderson & Son and David Henderson, the Parcel.

         NOW,  THEREFORE,  the parties hereto,  in  consideration  of the mutual
promises and covenants  contained herein, and each intending to be legally bound
hereby, agree as follows:

1.       Sale of Property.

         A.  Subject  to and upon the  terms  and  conditions  set forth in this
Agreement,  each Seller agrees to sell, assign, transfer,  deliver and convey to
Buyer, and Buyer agrees to purchase, acquire and accept from each Seller, all of
each Seller's right,  title, and interest in the Building or the Parcel,  as the
case may be, which it owns, as set forth in the Recitals  above for the purchase
price hereinafter set forth.

         B. Buyer agrees to pay to each Seller and each Seller  agrees to accept
as the purchase  price for its  Building or the Parcel,  as the case may be, the
following sum:
<TABLE>
<CAPTION>

                  Property                                         Price
                  --------                                         -----
                  <S>                                           <C>
                  International Court I Building                $12,020,000
                  International Court II Building               $23,100,000
                  International Court III Building              $ 7,880,000
                  Parcel                                        $ 2,000,000
</TABLE>

Each  of  the  foregoing  sums  is  sometimes  hereinafter  referred  to as  the
"Individual  Purchase Price" for the Building or the Parcel designated  opposite
such  sum,  and  the  sum of all  of  them,  being  Forty-Five  Million  Dollars
($45,000,000.00), is sometimes hereinafter referred to as the "Purchase Price".

         C. Each Seller agrees to sell,  convey,  assign and transfer as part of
this Agreement,  with respect to its Building or the Parcel, as the case may be,
the following:

                  (1) All open parking areas and improvements, including without
limitation, all mechanical,  electrical,  heating, ventilation, air conditioning
and plumbing fixtures, systems and equipment as well as all compressors, engines
and elevators, if any; and
<PAGE>
                  (2) All  leases  and  other  agreements  with  respect  to the
occupancy  of the  Building  or the Parcel,  together  with all  amendments  and
modifications thereto ("Leases"),  and rents, additional rents,  reimbursements,
profits,  income and receipts with respect to the period  commencing on the date
of Closing and continuing  thereafter as set forth below, and Security Deposits,
as hereinafter defined, thereunder and all of Seller's right, title and interest
in and to those  contracts and  agreements for the  servicing,  maintenance  and
operation  of the  Building or the Parcel  ("Service  Contracts")  to the extent
Buyer elects to assume same as provided in Paragraph 3.D. herein; and

                  (3) All right,  title and  interest,  if any, of the Seller in
and to those certain fixtures, equipment,  furniture and other items of personal
property affixed to or appurtenant to the Building or the Parcel owned by Seller
and  constituting  either  a part of a  Building  or the  Parcel  or used in the
operation thereof, including,  without limitation, all carpets, drapes and other
furnishings;   maintenance   equipment  and  tools,  all  fixtures,   machinery,
transformers, apparatus, fittings, freezing, lighting, laundry, incinerating and
power  equipment  and  apparatus,  all engines,  pipes,  pumps,  tanks,  motors,
conduits,  switchboards,  plumbing,  lifting, cleaning, fire prevention and fire
extinguishing  and  refrigerating  equipment  and  apparatus;   shades,  blinds,
awnings,  screens,  storm doors and  windows,  cabinets,  partitions,  ducts and
compressors,  rugs,  furniture  and  furnishings,  hot  water  heaters,  garbage
receptacles  and containers  above and below ground,  keys to locks on or in the
Building, and all other machinery,  equipment,  meters,  boilers,  repair parts,
fixtures  and tangible  personal  property of every kind and  character  and all
accessions  and additions  thereto owned by and in the  possession of Seller and
attached  to or  located  upon  and  used  in  connection  with  the  ownership,
maintenance,  or  operation  of the  Building  or the  Parcel  which are not the
property  of  Tenants  of  the  Building  or of  other  persons  (the  "Personal
Property") (As used in this Agreement,  the term "Tenant" shall mean any and all
occupants of the Building or the Parcel.); and

                  (4) All right,  title and  interest,  if any, of the Seller in
and to any land  lying in the bed of any  public  street,  any  interest  in any
public or private road, alley,  easements,  rights of way, water, water courses,
sewer  rights,  hereditament  or  avenue  opened  or  proposed,  in  front of or
adjoining said Building or the Parcel,  as the case may be, including all strips
and gores  between the Building or the Parcel,  as the case may be, and abutting
property,  to the center line thereof all  appurtenances  to the Building or the
Parcel; and

                  (5) All right, title and interest of Seller, if any, in and to
all current or proposed site plans, and all surveys, soil and substrata studies,
architectural drawings, plans and specifications, engineering plans and studies,
floor plans,  landscape plans,  operating or maintenance manuals and other plans
and studies of any kind owned by Seller, if any, with respect to the Building or
the Parcel or the Personal Property ("Plans"); and
<PAGE>
                  (6) All books,  records,  promotional  material,  tenant data,
leasing material and forms, current rent rolls, market studies,  keys, and other
materials of any like kind owned by Seller,  if any, which are or may be used in
Seller's ownership or use of the Building or the Parcel or the Personal Property
(to the extent any such material or  information is contained in a document that
also contains  material or  information  with respect to a property other than a
Building or the Parcel,  then Seller shall retain  ownership of the document and
provide to Buyer a copy thereof, redacted to remove information relating to such
other property) during the three (3) year period immediately  preceding the date
of  Closing;  Seller  shall  retain  the  originals  of  such  for  purposes  of
record-keeping  and shall  provide true and correct  copies to Buyer ("Books and
Records"); and

                  (7) All right, title and interest of Seller, if any, in and to
the use of the  names,  "International  Court"  and a  license  to use the  name
"Airport  Business Center" as such relates to the Buildings and the Parcel,  but
Seller shall retain such right, title and interest, if any, in and to the use of
such name as such relates to other property  owned by any Seller,  and any other
name by which the property is commonly known, and all goodwill,  if any, related
to the name by which the Buildings are commonly known ("Trade Names"); and

                  (8) All right, title and interest of Seller, if any, in and to
any and all  licenses  and  permits  owned  or held  by  Seller  (including  any
certificates of occupancy) to the extent such are assignable and in any way used
in  connection  with the ownership or operation of the Building or the Parcel or
the Personal Property (collectively, "Licenses and Permits"); and

                  (9) All other rights,  privileges and  appurtenances  owned by
Seller,  if any,  and in any way related to the rights and  interests  described
above in this Section;  provided,  however, that if such rights,  privileges and
appurtenances  also  benefit  or relate to  property  constituting  the  Airport
Business  Center owned by Seller other than the Buildings  and the Parcel,  then
Seller shall retain an ownership  interest therein and shall grant and convey to
Buyer such  interest and right as may be necessary or desirable  for Buyer's use
and enjoyment of the Buildings and the Parcel.

(The  foregoing  Buildings,  the  Parcel,  rights  and  interests  set  forth or
described  in  subsections  (1)  through  (9) of this  Section  are  hereinafter
collectively referred to as the "Property".)

2.       Payment of Purchase Price.

         A.  Simultaneously with the execution and delivery of this Agreement by
each Seller,  Buyer shall deliver to Commonwealth  Land Title Insurance  Company
("Title Company"),  as escrow agent, a cash deposit in the amount of Two Hundred
Fifty Thousand Dollars ($250,000.00) to be held by Title Company as the security
for the performance of Buyer's obligations hereunder (together with all interest
earned thereon,  the "Initial  Deposit") pursuant to the provisions set forth in
Paragraph 19.

         B.  Within  five (5) days after the end of the  Inspection  Period,  as
hereinafter defined, Buyer shall at its sole option deliver to Title Company, as
escrow  agent,  either an  additional  cash deposit in the amount of Two Hundred
Fifty Thousand Dollars ($250,000.00),  together with all interest earned thereon
(the "Second Deposit") or an irrevocable and  unconditional,  domestic letter of
credit (the "Letter of Credit"),  issued by a financial  institution  reasonably
acceptable  to Sellers  for the  account of Buyer and  naming  Title  Company as
beneficiary, in the sum of Five Hundred Thousand Dollars ($500,000.00),  payable
on December 10, 1996, in form reasonably acceptable to Sellers (the "Letter of
<PAGE>
Credit  Deposit"),  to be  held  by  Title  Company  as  the  security  for  the
performance  of Buyer's  obligations  hereunder  pursuant to the  provisions set
forth in Paragraph 19. (The Initial Deposit and the Second Deposit,  if and when
made, are sometimes  hereinafter  collectively referred to as the "Deposit".) In
the event Buyer  elects to and does  deliver the Letter of Credit  Deposit,  the
Initial  Deposit  shall be  promptly  returned  to Buyer  by the  Escrow  Agent,
notwithstanding  anything to the contrary set forth in Paragraph 19 or otherwise
in this  Agreement,  and the Letter of Credit  Deposit shall be deemed to be the
Deposit for the purposes of this Agreement.

         C. At the  time of  Closing,  the  Deposit,  if not in the  form of the
Letter of Credit Deposit, shall be applied to the Purchase Price.

         D.  Buyer  shall  pay to each  Seller  the  balance  of the  Individual
Purchase Price for its Building or Parcel, as the case may be, plus or minus any
credits and adjustments as may be provided  herein,  and less the application of
the Deposit,  if not in the form of the Letter of Credit Deposit,  in cash or by
wire transfer of the immediately available federal funds to such Seller's order.

         E. In the event that the Parcel Closing, as hereinafter defined, is not
held on the same date as the Closing, as hereinafter  defined, but is held on or
before the first  anniversary of the date of Closing,  the  Individual  Purchase
Price for the Parcel shall be Two Million Dollars ($2,000,000.00); if the Parcel
Closing is held on a date that is after the first anniversary of the Closing but
before the second anniversary of the Closing,  the Individual Purchase Price for
the Parcel shall be Two Million Fifty Thousand Dollars  ($2,050,000.00);  and if
the Parcel Closing is held on a date that is after the second anniversary of the
Closing,  the Individual  Purchase Price for the Parcel shall be Two Million One
Hundred  Thousand  Dollars  ($2,100,000.00),  subject to  adjustment as provided
herein.  The  parties'  respective  rights and  obligations  with respect to the
Parcel are more fully set forth in Paragraph 26 hereof.

3.       Certain Conditions.

         The following shall be conditions  precedent to Buyer's  obligations to
close hereunder:

         A. Buyer shall have thirty (30) days,  commencing with the date of this
Agreement, in which to review all Leases, contracts,  income, expenses,  Service
Contracts,  Plans,  Books and  Records,  business  records,  including,  without
limitation,  engineering and environmental  reports,  to conduct or retain third
parties to conduct physical inspections,  soil tests and borings,  environmental
surveys and tests, ground water tests and investigations,  marketing surveys and
such other tests,  inspections  and surveys as Buyer deems relevant or necessary
to  this  purchase  ("Inspection  Period").  In the  event  Buyer,  in its  sole
discretion  is not  satisfied  for any reason with the  results of said  review,
tests, reports, or inspections,  this Agreement shall terminate as of the end of
the Inspection  Period.  In the event Buyer elects to continue with the purchase
of the  Property  under  this  Agreement,  Buyer  shall  provide  notice of such
election to Seller  prior to the  expiration  of the thirty (30) day  Inspection
Period.  The failure by Buyer to timely provide  written notice to Seller of its
election to continue with the purchase shall be evidence of Buyer's  termination
<PAGE>
of this Agreement. For purposes of the notice referred to above, only, Buyer may
provide  notice to Seller by hand  delivery  to  Seller's  address  set forth in
Paragraph  18  hereof,  and such  shall be  deemed  good  notice  on the date so
delivered.  Buyer may elect not to proceed under this Agreement within said time
period  for any reason  whatsoever  or no  reason.  In the event this  Agreement
terminates by operation of this  Paragraph,  Buyer will deliver to Seller at the
time that the  Deposit is  returned to Buyer,  copies of all  environmental  and
engineering  reports and tests that it has  received  or caused to be made,  the
Deposit shall be returned to Buyer,  this  Agreement  shall become null and void
and neither Seller nor Buyer shall have any further rights or obligations  under
this Agreement.

                  (1)  Seller   hereby   agrees  that  Buyer,   its  agents  and
contractors, shall have the right to enter onto the Buildings and the Parcel and
Seller agrees to permit inspections, tests, borings, investigations, and studies
by Buyer,  its agents and  contractors,  of or related to the  Buildings and the
Parcel,  as Buyer,  in its sole  discretion  may deem  necessary  or  desirable,
including  without  limitation,   tests  involving  the  roof,  HVAC  and  other
structural elements of each of the Buildings,  as well as soil borings and tests
and ground water tests and  investigations.  Prior to undertaking  any test that
will result in any  material  damage to the Real  Property,  Buyer shall  obtain
Seller's  written consent,  which consent shall not be unreasonably  withheld or
delayed.  If such consent is not denied within  twenty-four (24) hours after the
written  request  therefor is delivered to Seller,  the consent  shall be deemed
granted.  Seller shall advise Buyer of any conditions  which exist,  that due to
the nature of the test,  boring or investigation to be performed by or on behalf
of Buyer pose a dangerous  condition to Buyer or any other person.  Seller shall
cooperate with Buyer and shall use reasonable  efforts to secure the cooperation
of Tenants,  contractors  and engineers with Buyer's  inspections.  Seller shall
allow free access to the grounds and the common and Building system areas of the
Buildings and to the Parcel during normal business hours,  subject to the rights
of  Tenants  under  law  and  the  Leases.  Tenant  areas  will  be  subject  to
investigation  with  permission  of  Tenants,  who  generally  will  not  permit
inspection  during normal  business  hours.  Seller will, with the permission of
Tenants,  make available to Buyer its personnel to assist in obtaining access to
Tenant  areas  during  evening and weekend  hours.  Seller will deliver to Buyer
documents in its possession  concerning any Plans and/or  surveys,  current rent
roll, Licenses and Permits,  Books and Records of the last three years,  Leases,
Service  Contracts,  ground  water  tests  and  investigations,  soil  tests and
borings,  and hazardous waste reports which Seller has in Seller's possession or
subject to Seller's control,  in regard to the Property and such other documents
in Seller's  possession,  if any, which Buyer may  reasonably  desire to inspect
within three (3) business  days after written  request  therefor is delivered to
Seller.

                  (2)  Buyer  agrees  that it shall  indemnify  and hold  Seller
harmless from any and all actions,  causes of actions,  claims, suits, costs and
expenses,  including  reasonable counsel fees, as a result of personal injury or
damage to property,  including  the  Property,  to the extent  arising out of or
occurring as a result of the actions or failure to act of Buyer,  its  servants,
agents or  employees  and  contractors  in the  course  of having  access to the
Premises and or performing the tests and inspections permitted hereunder, except
to the extent caused by Seller, Tenants or their respective agents, servants and
employees or other third  parties over whom Buyer has no control.  Buyer further
agrees  that  if it  undertakes  any  tests  in  which  portions  of  Buildings,
improvements or land are damaged, displaced or removed, Buyer, at its cost, will
promptly  restore such to its condition prior to the performing of such tests or
inspections.
<PAGE>
         B. All of Seller's  representations shall be true and correct as of the
date of Closing, unless expressly limited to the date of this Agreement.

         C. As of  Closing,  the title to the  Property  shall  comply  with the
requirements specified in Paragraph 4 hereof.

         D.  Buyer,  at least  thirty-five  (35) days  prior to  Closing,  shall
identify  in writing to Seller  those  Service  Contracts  that Buyer  wishes to
assume ("Elected Service Contracts").  Seller shall cause all Service Contracts,
other than the Elected Service  Contracts,  to be terminated so that there shall
be no  contracts  or  agreements  for  supplies  or  services  to  the  Property
outstanding on the date of Closing. Buyer shall, in writing, on terms reasonably
acceptable to Seller,  agree to assume the Elected Service Contracts and release
Seller of all liability for obligations or occurrences  arising  therefrom after
the date of Closing.

         E. Seller shall have  performed all of its  covenants,  agreements  and
obligations  set  forth  herein  and shall  have  complied  with all  conditions
required by this  Agreement  to be  performed  or complied  with by Seller on or
before the date of Closing.

         F. Seller shall have  delivered to Buyer all of the documents  required
to be delivered as set forth in Paragraph 12 hereof.

         G. In the event the zoning  classification  of any  Building is changed
prior to Closing without Buyer's written approval, Buyer shall have the right to
cancel this Agreement and to receive the Deposit,  whereupon neither party shall
have any further rights, duties or obligations under this Agreement.

         H. Valid and final certificates of occupancy shall have been issued for
each  Building and for each of the spaces  leased to Tenants and no space in any
Building   shall  have  been  leased  or  occupied  in  violation  of  any  such
certificate.

         I. As of Closing,  there shall be no sewer moratorium  affecting any of
the Buildings or the Parcel.

         J. The Property shall be in compliance with all Environmental  Laws (as
hereinafter defined).

4.       Title.

         A. At the  Closing  and the  Parcel  Closing  hereunder,  title  to the
Buildings  and to the  Parcel,  shall be  transferred  in fee  simple,  good and
marketable,   free  and  clear  of  all  liens,   encumbrances,   easements  and
restrictions,  except for those items set forth on Exhibit  "B" hereto  attached
and made a part  hereof,  or those to which  Buyer  agrees  in  writing  to take
subject  to  ("Permitted  Exceptions")  and  shall  be  insurable  as  good  and
indefeasible  fee simple title to the  Property,  subject only to the  Permitted
Exceptions,  at standard rates by a responsible  title insurance  company in the
Philadelphia  and Delaware  County area.  There shall be no  restrictions  which
would  prohibit  the use of the  Buildings  or the  Parcel  as  offices,  office
buildings,  or an office park.  Each Seller  shall use its  diligent  efforts to
deliver  title  as  required  hereunder,  subject  to  the  provisions  of  this
Agreement.
<PAGE>
         B. Each Seller  shall  inform Buyer within ten (10) days after the date
of this  Agreement of the existence of any mortgage liens on the Building or the
Parcel,  which  it owns,  and the  outstanding  principal  balance  and  accrued
interest due and owing  thereon.  Each Seller shall use a portion of the Closing
proceeds to satisfy any amounts due under such mortgages. Any such mortgage lien
shall be discharged or satisfied  prior to or at Closing by Seller.  If any such
mortgage  lien is not held by an  institutional  lender,  then  Seller  shall be
obligated  to present at Closing a fully  executed  discharge  and  satisfaction
piece in recordable form and an original of such mortgage  properly endorsed for
cancellation.

         C. If, at or before Closing, it appears that any Building or the Parcel
may be or is  subject  to  mechanics'  or  materialmen's  liens  or the  lien of
decedent's  debts,  the Seller owning such Building or Parcel shall, at Seller's
cost and expense,  provide special insurance against such lien and upon so doing
the same shall be considered  good delivery of title with respect  thereto under
this  Agreement.  Each Seller shall discharge at Closing all monetary liens that
it voluntarily has agreed to attach to the Property in exchange for any monetary
benefit  (each such lien is sometimes  referred to  hereinafter  as a "Voluntary
Lien").

         D. If, at or before Closing, it appears that any Building or the Parcel
is subject to the possible lien of unsettled  corporate taxes or will be subject
to possible  corporate  tax  liability  of the Seller  owning  such  Building or
Parcel,  that Seller will enter into an agreement  satisfactory to Title Company
or deposit  funds or security  with Title  Company as  required to induce  Title
Company to insure title to the subject  Building or the Parcel free and clear of
loss or damage by reason of the nonpayment of such unsettled and other corporate
taxes and the same shall be  considered  good  delivery  of title  with  respect
thereto under this Agreement.

         E. In the event any  monetary  liens  (other  than a  mortgage  lien or
mechanic's  or  materialmen's  lien  or a  Voluntary  Lien)  exist  against  the
Property, which individually or in the aggregate are less than or equal to Three
Hundred Fifty Thousand Dollars  ($350,000.00),  then Seller shall discharge such
lien or liens prior to or at  Closing,  by payment or by posting a bond with the
court having jurisdiction over such lien. If Seller desires to contest said lien
and cannot discharge the lien by bonding, then Seller shall post an amount equal
to the lien,  plus  interest  payable  thereon,  if any,  with Title Company and
Buyer,  in escrow.  Seller  shall  execute and deliver an  agreement,  as may be
required by Title  Company to insure  over such lien,  and as may be required by
Buyer,  to provide  for the use of such funds to satisfy  such lien in the event
that any action to execute thereon is initiated against the encumbered  Building
or Parcel,  or in  connection  with any  financing  or sale of such  Building or
Parcel by Buyer. If such lien or liens are individually or in the aggregate with
the cost of  compliance as set forth in Paragraph  11.J hereof,  more than Three
Hundred Fifty Thousand Dollars  ($350,000.00),  then Buyer shall have the option
of either (i) terminating this Agreement and receiving back the Deposit, or (ii)
completing  Closing  hereunder and  receiving  from Seller a Three Hundred Fifty
Thousand Dollar ($350,000.00) credit against the Purchase Price.

5.       Closing.

         A. Closing on the purchase of the Buildings, and or the Parcel, if held
concurrently, (the "Closing") shall occur at the offices of Seller or such other
location as shall be mutually  agreed upon by the parties,  between  December 2,
1996,  and  December  6, 1996,  and in no event  shall  Closing be held prior to
December 2, 1996.
<PAGE>
         B. As more fully set forth below in  Paragraph  26,  Buyer may elect to
close on the purchase of the Parcel on a date other then the Closing. Closing on
the purchase of the Parcel if not concurrently with the Closing,  shall occur by
the parties at any time within  three (3) years after the Closing  upon ten (10)
days written  notice from Buyer to Seller at the offices of Seller or such other
location as shall be mutually agreed upon (the "Parcel Closing"),  and any term,
covenant,  representation  or warranty  made or given  herein with respect to or
applicable  to the Parcel shall extend to and be  applicable  to the date of the
Parcel  Closing,  and this Agreement  shall remain in full force and effect with
respect to the Parcel, unless specifically provided otherwise herein.

         C. Except as set forth in Paragraphs 4.C. and 4.D., all title insurance
fees and premiums shall be borne by Buyer.

6.       Apportionments at Closing.

         A. The payment of all realty  transfer taxes shall be the obligation of
Seller and shall be paid at Closing.

         B. The following items with respect to each Building and the Parcel are
to be apportioned as of 11:59 P.M. on the date preceding the Closing:


                  (1) Rents and percentage  rents payable by Tenants as and when
collected.  Any rent from a Tenant received by Buyer after Closing for the month
in which  Closing  occurs,  shall be  pro-rated on a per diem basis based on the
actual  number of days in such month,  and Buyer shall,  within thirty (30) days
after receipt of such rent,  provide to Seller its proportionate  share thereof.
All other monies  received  from Tenants from and after the Closing shall belong
to Buyer and shall be applied by Buyer to current  rents and other charges under
the Leases. After application of such monies to current rents and charges, Buyer
agrees to remit to Seller any excess amounts paid by a Tenant to the extent that
such Tenant was in arrears in the payment of rent prior to the  Closing,  not in
excess of one (1) month's rent. The provisions of this subsection  shall survive
the Closing.

                  (2)  Utility  charges  payable  by Seller,  including  without
limitation, electricity, water charges and sewer charges. If there are meters on
the Building,  Seller will cause readings of all said meters to be performed not
more than five (5) days prior to the Closing.

                  (3)      Amounts payable under the Elected Service Contracts.

                  (4)      Real estate taxes due and payable.

                  (5)      Income from vending machines, if any, and all other
income, if any, other than rents.

         C. At the Closing  Seller shall deliver to Buyer a certified  statement
for each Tenant of the Tenant's  Operating  Allowance,  the Operating Lease Year
and the Estimated  Operating Expenses (as defined in the Leases) with respect to
any  Operating  Lease  Year for which  the  expenses  have not been  reconciled,
setting forth  Seller's  expenses  passed  through to Tenant for such  Operating
Lease Year including, but not limited to, expenses common to all Tenants such as
<PAGE>
real estate taxes,  insurance costs,  common area utility costs and other common
area operating expenses as well as those charges specific to a particular Tenant
("Additional  Rent") as well as the amount Seller has paid or incurred,  monthly
and in the aggregate,  for each item of Additional  Rent to the date of Closing.
In the event that  Seller has  expended  more than the amount  billed to Tenant,
Buyer shall pay Seller the  difference  between the amount  expended or incurred
and the amount  billed to the Tenant.  In the event  Tenant has been billed more
than the expenses which Seller has paid or incurred,  Buyer shall be entitled to
a credit  against the  Purchase  Price in the amount of such  difference.  Buyer
agrees to remit said  amount to each  Tenant as shown on the  statement.  Seller
acknowledges  its  obligation  to each  Tenant  with  respect  to any  claims of
overpayment of Additional  Rent for any period to the date of Closing other than
as set forth on said statement,  and that such obligation shall survive Closing.
In the event that a Tenant subsequently disputes the amount of such expenditures
by Seller,  Seller shall provide Buyer with copies of the invoices and evidences
of payment of the invoices for the purposes of resolving  such  dispute.  In the
event Buyer is unable to resolve such dispute amicably, Buyer may request Seller
to provide counsel for any litigation which may ensue.

         D. Except as  otherwise  provided in this  Agreement,  the  adjustments
shall be made in  accordance  with the  customs in respect  to  closings  in the
Commonwealth of Pennsylvania.

         E. Any errors in  calculations  or  adjustments  shall be  corrected or
adjusted as soon as practicable after the Closing.

7.       Allocation of Purchase Price.

         The  parties  agree  that the price for the  three  Buildings  shall be
allocated  among the Buildings as set forth in Paragraph  1.B.  above,  and that
such division of the purchase price is a fair  allocation of the relative market
values of the Buildings.

         The parties agree that notwithstanding the aforesaid, the Agreement for
the sale of the Buildings is indivisible  and all Buildings must be purchased or
the Agreement is subject to  cancellation  by either party hereto  regardless of
the reason for the liability,  failure,  or refusal to offer to convey or accept
less than all the  Buildings,  provided,  however,  that no Seller may terminate
this  Agreement  due to the failure or refusal of another  Seller to comply with
the terms hereof and Buyer may not terminate  this  Agreement as to any Building
unless  Buyer  terminates  this  Agreement as to all  Buildings  and the Parcel.
Neither Buyer nor Seller may select any one or more of the Buildings for sale or
purchase at the allocated prices.

8.       As-Is Purchase.

         The parties  hereto  agree that,  except as  otherwise  represented  or
warranted  in this  Agreement,  the sale of the  Parcel and  Buildings  is on an
"as-is" basis. Buyer agrees that it will complete the purchase only on the basis
of its own  inspection of the Property,  tests and  inspections by engineers and
other consultants,  its analysis of the Leases and Tenants,  and verification of
the income and operating  expenses and not in reliance upon any  representations
or  statements  made  by  Seller,  its  employees  and  agents,  or  Broker,  as
hereinafter  defined,  its  agents,  servants  or  employees,  other  than those
contained in this Agreement or in any instrument or document  delivered pursuant
hereto.
<PAGE>
9.       Seller's Representations.

         A.  As a  material  inducement  to  cause  Buyer  to  enter  into  this
Agreement,  each Seller  hereby  makes the  following  covenants,  warrants  and
representations with respect to it and its respective Property:

                  (1) Each  Building  and the  Parcel  is zoned  BCD -  Business
Center District.

                  (2) With reference to the items of Personal Property,  if any,
sold pursuant to this Agreement, Seller, as to such items, if any, applicable to
its Building or Parcel,  is the sole and absolute owner thereof,  free and clear
of  all  security  interests,   bills  of  sale,  chattel  mortgages,   security
agreements,  liens and  encumbrances,  except for security  interests granted in
favor of the holder of any mortgage to be paid off on or before Closing.

                  (3) Annexed hereto as Exhibit "C" (the "Rent Roll") is a true,
complete  and correct  schedule of all Leases,  which  Leases are valid and bona
fide and are now in full force and effect.  Seller has  delivered to Buyer true,
correct and  complete  copies of all of the Leases.  Except as  disclosed on the
Rent Roll, to the best of Seller's knowledge, no defaults exist under any Lease.
The Leases constitute all of the leases,  tenancies or occupancies affecting the
Buildings  or  the  Parcel  on the  date  hereof;  all  Tenants  have  commenced
occupancy;  other than the Leases, there are no agreements which confer upon any
Tenant or any other person or entity any rights with respect to the Buildings or
the  Parcel;  no  Tenant is  entitled  now or in the  future to any  concession,
rebate,  offset,  allowance or free rent for any period,  nor has any such claim
been asserted by any Tenant; no Tenant is in arrears for the payment of rent for
any months preceding  September,  1996; all work,  alterations,  improvements or
installations  required  to be made for or on  behalf of all  Tenants  under the
Leases have in all respects been carried out,  performed and complied  with, and
there is no agreement with any Tenant for the performance of any work to be done
in the future.

                  (4) The Rent Roll sets forth:  (i) the total number of Tenants
at the Buildings and the Parcel; (ii) the name of each Tenant;  (iii) fixed rent
actually being  collected;  (iv)  expiration  date of the Leases  (including all
rights or options to renew);  all deposits posted under the Leases and all other
deposits,  if any, in the nature of security for  performance  by a Tenant under
its Lease ("Security  Deposits");  (vi)  arrangements  under which any Tenant is
occupying  space on the date  hereof or will in the  future,  occupy  such space
(other than under a Lease);  (vii) any written notices given by any Tenant of an
intention to vacate space in the future;  and (viii) the operating lease year(s)
and base year(s) and operating  lease year amounts and base year amounts for all
items of rent or Additional  Rent.  Seller has performed all of the  obligations
and observed all of the  covenants  required of the landlord  under the terms of
the Leases.

                  (5) There are no  service,  maintenance,  employment  or other
contracts affecting the Property or any portion thereof which will not have been
terminated  as of Closing,  other than the Elected  Service  Contracts.  Without
Buyer's consent, Seller shall not enter into any other contracts which cannot be
terminated prior to Closing.  True,  accurate and complete copies of the Service
Contracts  have  been  initiated  by the  parties.  All of the  Elected  Service
<PAGE>
Contracts  are and will on the date of Closing be  unmodified  and in full force
and effect  without  any default or claim of default by any party  thereto.  All
sums  presently  due and payable by Seller under the Elected  Service  Contracts
have been fully paid and all sums which become due and payable  between the date
hereof and the date of Closing shall be fully paid on the day of Closing, unless
Seller  is, in good  faith,  disputing  the  payment of such sum.  Seller  shall
provide to Buyer  prompt  notice of any dispute with or default by any vendor of
an Elected Service Contract but failure to do so will not constitute a breach of
this covenant.

                  (6) Each of the  respective  Sellers  is the sole owner of fee
simple title of the Building or the Parcel,  as set forth in the  Recitals,  and
has the  right to convey  by  special  warranty  deed fee  simple  title to such
Building or to the Parcel, as the case may be.

                  (7) To the best of Seller's knowledge, there are no violations
of any building codes, zoning codes or other township  ordinances  applicable to
the Buildings or the Parcel, or the operation  thereof.  Seller has no knowledge
of any notices,  suits,  investigations or judgments alleging or relating to any
violations  of any laws,  ordinances,  regulations,  codes,  decrees,  orders or
statutes affecting the Property,  or the use and operation  thereof,  and has no
reason to believe that any governmental agency,  authority or board contemplates
the issuance or commencement thereof.

                  (8) There are no pending legal  proceedings,  actions,  suits,
labor  disputes  currently  pending  or,  to the  best  of  Seller's  knowledge,
threatened  against or  affecting  title to the  Property or any part thereof or
Seller,  except suits for personal  injury to third  persons that are covered by
insurance.

                  (9) There are no  leasing  commissions  due on  account of the
original term of all Leases or any extensions and renewals  thereof and owing by
the Seller. All commissions,  including without  limitation,  those disclosed to
Buyer, and shall be fully satisfied by Seller prior to Closing.

                  (10) To the best of Seller's  knowledge,  the public utilities
available  for the  operation  of the  Buildings  as an office  park or any part
thereof,  i.e.,  water,  sewer, gas and electricity,  are fully available to the
Buildings and enter the office park through  Stevens  Drive in  accordance  with
valid easements which are recorded and which will enure to the benefit of Buyer.
To the best of  Seller's  knowledge,  said  utilities,  as built,  extend to the
cul-de-sac,  but do not extend to the edge of the  Parcel,  except  gas  service
which does not extend to the cul-de-sac.

                  (11) There exists no building permits under which work remains
to be completed.

                  (12)  To  the  best  of  Seller's  knowledge,   there  are  no
underground  storage  tanks on the  Buildings  or the Parcel,  except one 10,000
gallon tank for heating oil  servicing  International  Court II Building and all
required permits and registrations  with respect to such tank have been obtained
by Seller and remain in full force and effect.

                  (13)  Henderson/Tinicum  Partnership and Wilbur C. Henderson &
Son are  Pennsylvania  general  partnerships,  duly formed and validly  existing
under the laws of the  Commonwealth  of Pennsylvania  and the persons  executing
this Agreement on behalf the partners of such  partnership  are authorized to do
so.
<PAGE>
                  (14)   International   Court  II  Limited   Partnership  is  a
Pennsylvania  limited partnership duly formed and existing under the laws of the
Commonwealth of Pennsylvania.  The person or persons executing this Agreement on
behalf of the general  partner of such limited  partnership are authorized to do
so.

                  (15)  International  Court III Joint Venture is a Pennsylvania
general  partnership  duly  formed and  validly  existing  under the laws of the
Commonwealth of Pennsylvania.  The persons executing this Agreement on behalf of
the entities comprising the partnership are authorized to do so.

                  (16)  Seller  has had a  delineation  of the  wetlands  on the
Parcel made by a wetlands consultant. A copy of the wetlands delineation and the
site plan for said Parcel upon which the wetlands have been  delineated has been
or  will  be  delivered  to  Buyer.  To the  best of  Seller's  knowledge,  such
delineation of the wetlands is accurate and complete.

                  (17) Under current zoning and land development laws, codes and
ordinances and other laws and regulations  applicable to the Parcel, as a matter
of right,  without the need for any variance,  exception or other relief,  there
can be constructed on the Parcel with the wetlands  delineation  discussed above
in  Paragraph  9.A(17),  either (i) a minimum of 135,000  square  feet of office
space with parking therefor at the ratio of four spaces per 1,000 square feet of
space,  or (ii) a minimum of 150,000 square feet of office space with structured
parking as needed to  achieve a parking  ratio of four  spaces per 1,000  square
feet of space.  Sewer  capacity is  available  to support the  construction  and
operation  of the  amount  of  space  set  forth  in the  immediately  preceding
sentence.

                  (18) All documents  delivered by Seller to Buyer in accordance
with the  provisions  of this  Agreement  will be true  and  correct  copies  of
Seller's  records,  either maintained by Seller in its or his ordinary course of
business, or delivered to Seller for use in its or his business.

                  (19)  To  the  best  of  Seller's  knowledge,   there  are  no
outstanding  requirements  or  recommendations,  which  if  not  followed  could
jeopardize any insurance coverage,  by (i) the insurance company(s) which issued
the  insurance  policies  insuring  the  Buildings;   (ii)  any  board  of  fire
underwriters or other body exercising similar functions,  or (iii) the holder of
any  mortgage,  which require or recommend any repairs or work to be done on the
Buildings.

                  (20) The Seller  has  received  no  written  notice and has no
knowledge  of  (i)  any  pending  or  contemplated  annexation  or  condemnation
proceedings,  or private purchase in lieu thereof, affecting or which may affect
the Property,  or any part thereof,  (ii) any proposed or pending  proceeding to
change or redefine the zoning classification of all or any part of the Property,
(iii) any proposed or pending special assessments  affecting the Property or any
portion  thereof,  and (iv) any  proposed  changes  in any road or  grades  with
respect to the roads  providing a means of ingress  and egress to the  Property.
Seller  agrees to furnish Buyer with a copy of any such notice  received  within
two (2) days after receipt.

                  (21) All books  and  records  provided  by Seller to Buyer are
true, complete and correct.

                  (22) There are no employees of any Seller working at or in
connection with the Property.  There is currently no union  agreement  affecting
the Property and none will be in effect on the date of Closing.
<PAGE>
                  (23) Seller has all  requisite  power and authority to execute
and deliver this Agreement and all other  documents to be executed  delivered by
it  hereunder,  and to perform its  obligations  hereunder  and under such other
documents  and  instruments  in order to sell its Building or the Parcel and the
Property owned by it in accordance with the terms and conditions  hereof and all
necessary actions of the general and limited partners (stockholders and board of
directors)  of Seller to  confer  such  power  and  authority  upon the  persons
executing  this  Agreement  and all  documents  which are  contemplated  by this
Agreement on its behalf have been taken.

                  (24) This Agreement, when duly executed and delivered, will be
the legal,  valid and binding  obligation of Seller,  enforceable  in accordance
with  the  terms  of  this   Agreement,   subject  to  bankruptcy,   insolvency,
reorganization  or other  laws  affecting  the  rights of  creditors  generally.
Seller's  performance of its duties and obligations under this Agreement and the
transfer  documents  contemplated  hereby will not conflict with, or result in a
breach of or default  under,  any  provision  of any of Seller's  organizational
documents, any agreements, instruments, decrees, judgments, injunctions, orders,
writs, laws, rules or regulations, or any determination or aware of any court or
arbitrator,  to which Seller is a party or by which its or his assets are or may
be bound.

                  (25) No  petition  in  bankruptcy  (voluntary  or  otherwise),
assignment for the benefit or creditors,  or petition seeking  reorganization or
arrangement or other action under Federal or State bankruptcy laws is pending or
threatened against, or contemplated by Seller.

                  (26) No person, firm or entity has any rights in, or rights to
acquire all or any part of the Property.

         B. All  representations  and warranties herein made shall be considered
to have been made both as of the date of execution  hereof and as of the date of
Closing  hereunder,  unless  the  representation  is  as of  the  date  of  this
Agreement,  in which event the  representation is not as of the date of Closing.
With respect to  Henderson & Son and David C.  Henderson,  the  representations,
warranties set forth above in  subparagraphs  (6), (8), (9), (11),  (12),  (13),
(18), (20), (21), (22), (23), (24), (25) and (26) and covenants contained herein
shall  continue  and shall be  considered  to have been made both as of the date
hereof and as of the date of the Parcel Closing, to the extent applicable to the
Parcel and such Sellers or either, except as may be otherwise provided herein.

10.      Signage.

         A. Buyer and Seller of Parcel agree that such Seller will not post more
than one (1) sign on the Parcel of the same size as the existing  sign until the
date of the  Parcel  Closing.  Said sign shall be  limited  to  advertising  the
development or leasing of flex buildings  within Seller's  remaining  acreage in
the  Airport  Business  Center and the name,  address  and  telephone  number of
Seller's agent and shall include the  descriptive  word  "industrial".  If Buyer
does not close on the  purchase  of said  Parcel as  provided  herein,  Seller's
agreement  with  respect  to the  limitation  on  signage  on the  Parcel  shall
terminate and Seller will not thereafter be bound.
<PAGE>
         B.  Following  the Parcel  Closing,  Seller shall be entitled to post a
sign on the Parcel at the location  indicated on the sketch  attached hereto and
marked  Exhibit "H" for a period of two (2) years ending on the  anniversary  of
the  Parcel  Closing;  provided  however,  that if  Buyer  has  entered  into an
agreement for the sale or  development of said Parcel with a purchaser or lessee
who objects to the continuation of the sign for the balance of said two (2) year
period,   said  sign  shall  be  removed  to  a  location  on  the  premises  of
International  Court II  Building  or  International  Court  III  Building  at a
location mutually satisfactory to Buyer and Seller and as close to Interstate 95
as the existing sign. The cost of such removal and relocation of said sign shall
be borne by Seller.  Said sign after the date of Closing  shall be restricted to
the same  purposes as that agreed upon prior to the date of the Parcel  Closing.
In no event shall the sign located on Parcel II of the Airport  Business  Center
be used by Seller to  advertise  the sale or leasing of Seller's  office  space,
wherever  located.  Seller at its cost shall comply with all  applicable  codes,
rules,  regulations,  orders,  laws, and statutes  relating to the construction,
erection and  maintenance of such sign.  Seller shall maintain with an insurance
company  licensed  to  do  business  in  Pennsylvania,  casualty  and  liability
insurance  with  respect  to  such  sign in  amounts  and  coverages  reasonably
acceptable  to Buyer and naming  Buyer as an  additional  insured.  Seller shall
provide evidence,  reasonably  satisfactory to Buyer, of such insurance coverage
prior to the erection of such sign. Following the Parcel Closing,  Seller agrees
to  indemnify,  defend and hold Buyer  harmless  from and  against  all  claims,
damages,  liabilities and actions arising out of damage to property and injuries
to persons,  including death, resulting from the negligence or wilful misconduct
of Seller, its employees, agents, servants and independent contractors except to
the extent such damage or injury is caused by the  negligence  or  misconduct of
Buyer, its officers,  agents,  servants,  employees and independent contractors.
The terms of this Paragraph 10 shall survive closing.

11.      Other Obligations of Seller.

         During the period  between the execution of this  Agreement and Closing
hereunder and with respect to the Parcel,  the Parcel  Closing  hereunder,  each
Seller with respect to its property,  covenants and agrees that it shall perform
and observe the following with respect to the Property:

         A. Seller shall keep and maintain the  Buildings in the same  condition
as they now are,  ordinary  wear and tear and  damage by  accident  or  casualty
excepted.

         B. Seller will  operate and  maintain  the  Buildings  in the  ordinary
course  of  business  and  use  reasonable  efforts  to  maintain  the  existing
relationships of Seller and Seller's Tenants, suppliers, managers, employees and
others  having  on-going  relationships  with  the  Buildings.  Seller  will not
commence any capital expenditure  program.  Seller will not manage the Buildings
differently, due to the pending sale of the Buildings.

         C. Seller shall not:

                  (1) Enter into any agreement  requiring  Seller to do work for
any Tenant after the date of Closing  without first  obtaining the prior written
consent of Buyer; or

                  (2) Accept the surrender of any Service  Contract or Lease, or
grant any  concession,  rebate,  allowance or free rent,  without the consent of
Buyer, which consent shall not be unreasonably withheld.
<PAGE>
         D. Seller  shall not,  between the date hereof and the date of Closing,
apply  against  rent due any  Security  Deposits  with  respect to any Tenant in
occupancy on the date of Closing, unless such Tenant has vacated the Building.

         E.  Between the date  hereof and the date of  Closing,  Seller will not
renew,  extend or modify any of the Elected Service  Contracts without the prior
written  consent of the Buyer in each instance  first had and  obtained.  At the
Closing,  Seller will cancel or will have previously cancelled (effective on the
date of Closing) all Service  Contracts  except the Elected  Service  Contracts,
with all  cancellations  at Seller's  sole cost and  expense.  The snow  removal
contract expires at the end of October,  1996.  Seller will attempt to negotiate
the snow removal contract for the year commencing November, 1996, subject to the
approval of Buyer, which shall not be unreasonably  withheld.  If Buyer does not
approve such contract as negotiated by Seller,  then Seller shall not enter into
such contract  unless by its terms such contract can be terminated  effective at
the time of Closing.

         F. Seller shall not remove any of its Personal  Property  located in or
on the  Buildings  or the  Parcel,  except as may be  required  for  repair  and
replacement.  All replacements shall be free and clear of liens and encumbrances
and shall be of quality at least equal to the replaced items and shall be deemed
included in this sale, without cost or expense to Buyer.

         G. Seller  shall,  upon the request of Buyer at any time after the date
hereof,  assist  Buyer  in its  preparation  of  audited  financial  statements,
statements  of income and  expense,  and such other  documentation  as Buyer may
reasonably request, covering the period of Seller's ownership of the Property.

         H. Seller shall not voluntarily  cause the Buildings or the Parcel,  or
any interest therein, to be alienated, mortgaged, or otherwise be transferred.

         I. Up to and including  the date of Closing,  Seller agrees to maintain
and keep in full force and effect hazard and casualty insurance policies in such
amounts and for such coverages as set forth on Exhibit "D",  attached hereto and
made a part hereof.

         J. All violations of laws, statutes, ordinances,  regulations or orders
affecting the Buildings or the Parcel,  whether or not such  violations  are now
noted in the records of or have been issued by any governmental authorities will
be  complied  with by Seller and the  Buildings  and the Parcel will be conveyed
free of any such violations, provided that the cost of compliance,  individually
or in the  aggregate,  is less  than or equal to Three  Hundred  Fifty  Thousand
Dollars ($350,000.00). In the event that the cost of compliance, individually or
in the  aggregate  with the cost of  compliance  as set forth in  Paragraph  4.E
hereof,  is more than Three Hundred Fifty Thousand Dollars  ($350,000.00),  then
Buyer  shall  have the  option of either  (i)  terminating  this  Agreement  and
receiving back the Deposit,  or (ii) completing  Closing hereunder and receiving
from Seller a Three Hundred Fifty Thousand Dollar  ($350,000.00)  credit against
the  Purchase  Price.  Seller  shall  provide to Buyer  notice of any  violation
received by Seller within two (2) days after Seller's  receipt  thereof.  Seller
shall  provide to Buyer at least ten (10) days  prior to  Closing,  evidence  of
Seller's payment or of Seller's  correction of any violation made after the date
of this  Agreement.  Provided that if following  Closing,  the existence of such
<PAGE>
violation  shall not  prohibit  Buyer or any Tenant from using and  enjoying the
Building,  the Parcel or any part thereof, then if Seller disputes its liability
for or the  applicability  of any  violation,  Seller  shall  have the  right to
contest said  violation by  appropriate  measures.  In connection  with any such
contest,  Seller shall post with the court or agency  having  jurisdiction  over
such  contest,  or shall deposit in escrow with Title Company for the benefit of
Buyer pursuant to an escrow  agreement  satisfactory to Buyer and Title Company,
an amount equal to the estimated cost necessary to correct such violation,  plus
ten percent  (10%).  Seller shall have the right to continue  such contest after
Closing until a final determination  thereof by the appropriate court or agency,
provided  Seller also agrees in writing,  in form and  substance  acceptable  to
Buyer,  to  indemnify,  defend  and hold Buyer  harmless  from and  against  all
actions, causes of actions, fines, penalties, expenses, damages and costs, which
Buyer may incur resulting from such violation or contest.

12.      Documents to be Delivered at Settlement.

         A. At Closing, each Seller, as to its Building or Parcel and itself, at
its sole cost and expense, will deliver to Buyer the following,  all in form and
substance reasonably satisfactory to Buyer:

                  (1) The originals of all Leases,  together with all amendments
and modifications thereof and other documents pertaining thereto;

                  (2) Originals of all Permits and Licenses  Seller has obtained
pertaining to the operation and maintenance of the Buildings;

                  (3) A copy of the  notice  to the  Tenants  under  the  Leases
advising them of sale hereunder and instructing  such Tenants to make all future
rent payments to Buyer or its designee, as Buyer may direct;

                  (4) Copies of the income and expense records for the Buildings
for the previous two years

                  (5) To the extent  they are in Seller's  possession,  original
copies of the Building's plans and working drawings at the time of construction,
together with final "as built" surveys of the Buildings showing all improvements
now existing thereon.

                  (6) Original  Certificates  of Occupancy for the Buildings and
each of the spaces leased by Tenants.

                  (7)   Assignments,   in  form  acceptable  to  Buyer,  of  all
warranties and guarantees in Seller's possession in connection with construction
or maintenance of the Buildings.

                  (8) A certified statement to Buyer setting forth the amount of
all Security Deposits, and prepaid rents, together with any interest required to
be paid  thereon,  if any,  paid by the Tenants  under the Leases.  Seller shall
retain the  Security  Deposits  and Buyer  shall  receive a credit  against  the
Purchase  Price in an amount equal to all Security  Deposits and prepaid  rents,
together  with any interest  required to be paid  thereon,  if any,  paid by the
Tenants under Leases.
<PAGE>
                  (9) A letter  ("Estoppel  Letter") signed by each Tenant under
the Leases as reflected  on the list of Tenants  attached as Exhibit "C" hereto,
dated as no more than three weeks prior to Closing,  in  substantially  the form
attached  hereto as Exhibit "E", or if such Tenant refuses to execute fully such
an  Estoppel  Letter,  in such  form as may be set  forth in the  Lease for such
Tenant.

                  (10) A  Special  Warranty  Deed for  each  Building,  and,  if
appropriate, the Parcel, duly executed and acknowledged by Seller.

                  (11) A duly  executed  and  acknowledged  Bill of Sale for the
Personal Property.

                  (12) A FIRPTA Certificate duly executed by each Seller.

                  (13) A Rent Roll for the Buildings,  certified by Seller to be
true  and  correct  as of the date of  Closing,  setting  forth  the  names  and
locations  of Tenants,  and whether any Tenants are in arrears in the payment of
rent under such Tenant's Lease and the amount of such arrearage.

                  (14) An  affidavit,  or such other  documents  as  required by
Title  Company,  executed  by Seller  certifying  (i)  against  any work done or
supplies  delivered to the  Buildings or the Parcel which might be grounds for a
materialman's or mechanic's lien under or pursuant to Pennsylvania  law, in form
sufficient  to enable Title  Company to  affirmatively  insure Buyer against any
such lien,  (ii) that the  signatures on the Deeds are sufficient to bind Seller
and convey the Property to Buyer, (iii) that the conveyance is not prohibited or
restricted in any way under the laws of the  Commonwealth of  Pennsylvania,  and
(iv) the Rent Roll.

                  (15) Any and all fact affidavits and other previously executed
instruments  or  documents  (including  but not  limited  to all  organizational
documents  of  the  Seller  and  Seller's  general  partner   including  limited
partnership  agreements,  certificates  of  partnership,  by laws,  articles  of
incorporation,  and  good  standing  certificates)  which  Title  Company  shall
reasonably  require in order to insure title to Buyer,  subject to no exceptions
other than the Permitted Exceptions.

                  (16)  Originals  of all  Plans,  and  copies  of all Books and
Records for the past three years.

                  (17) All proper  instruments  as shall be reasonably  required
for (i) the conveyance of title to the appurtenances, and (ii) the assignment of
and/or collection rights to any condemnation or eminent domain claims, awards or
payments, as well as the right to claim or collect damages resulting from damage
to the  Buildings  or any part  thereof  by reason of the  changing  of grade or
closing of any street, road, highway or avenue.

                  (18) All such realty transfer tax affidavits and statements of
value and such transfer and other tax  declarations  and returns and information
returns,  duly  executed  and sworn to by Seller as may be required of Seller by
law in connection  with the  conveyance of the Property to Buyer,  including but
not limited to, Internal Revenue Service forms 1099-S and 1096.

                  (19) The  Seller's  closing  certificate  with  respect to the
representations  and warranties given herein and recertifying that same are true
and  correct on the date of Closing  and  containing  a  limitation  on survival
consistent with Paragraph 22(M) hereof.
<PAGE>
                  (20) A  letter  from  Tinicum  Township  certifying  that  the
Buildings comply in all respects with the current zoning ordinances,  if Tinicum
Township issues such letters as a matter of course.

                  (21) Such further  documents or  instruments  in form suitable
for recording, if appropriate, as necessary to effectuate the provisions hereof.

         B. At Closing,  Buyer,  at its sole cost and  expense,  will deliver to
Seller the  following,  all in form and  substance  reasonably  satisfactory  to
Seller:

                  (1) A certificate from its corporate secretary  certifying the
resolutions  of  Buyer   authorizing  the  transactions   contemplated  by  this
Agreement, and Buyer's articles of incorporation and bylaws; and

                  (2) A copy of the most recently  filed Form 10K by Cali Realty
Corporation ("Cali").

         C. At Closing,  Buyer and each Seller, as to its Building or Parcel and
itself, at a shared cost, will deliver to each other the following,  all in form
and substance reasonably satisfactory to them:

                  (1)  A  separate  assignment  and  assumption  agreement  duly
executed and  acknowledged  by Seller and Buyer,  pursuant to which Seller shall
assign to Buyer, and Buyer shall assume from Seller, all of Seller's interest in
and liability for future performance of the Leases,  Security  Deposits,  Plans,
Licenses and Permits, and Trade Names, all as more fully set forth above;

                  (2) An assignment and assumption agreement,  duly executed and
acknowledged  by Seller and Buyer,  pursuant  to which  Seller  shall  assign to
Buyer,  and Buyer shall  assume  from  Seller,  all of Seller's  interest in the
Elected Service Contracts; and

                  (3) A duly signed  statement  setting forth the Purchase Price
with all adjustments, credits and prorations shown thereon.

13.      Possession.

         Possession of the Property will be  transferred to the Buyer at Closing
by Special  Warranty  Deed and by keys to all of the Buildings and access to all
areas of the Property.

14.      Fire or Other Casualty.

         In the event of damage to or  destruction  of any of the  Buildings  by
fire or other  casualty of 25,000 square feet of rentable  office space or more,
Buyer shall have the option of:

         (a)  terminating  this  Agreement,  in which event the Deposit shall be
returned to Buyer and all rights and obligations of the parties  hereunder shall
terminate and shall be null and void; or
<PAGE>
         (b) of proceeding with Closing,  in which event the net proceeds of any
insurance  collected  prior  to  Closing  will be paid or  credited  to Buyer at
Closing,  and all unpaid claims and rights in  connection  with losses under any
insurance  policies  will he  assigned  to Buyer at Closing  and be  credited on
account of the  Purchase  Price and all claims and actions  with respect to such
casualty shall be assigned to Buyer. In consideration thereof,  Seller agrees to
continue  to  maintain  its  present  insurance  with risks  generally  known as
extended  coverage,  at Seller's cost and expense until Closing.  Forthwith upon
execution of this Agreement,  all of said policies of insurance will be endorsed
or  amended  to make  them  payable  to  Seller  and  Buyer as their  respective
interests may appear.  Certificates to this effect from the respective insurance
companies  will be  delivered  to Buyer  within  twenty  (20) days from the date
hereof and such  certificates  shall provide for at least ten (10) days' written
notice to Buyer in the event of  cancellation  or material change in coverage in
any of the policies evidenced thereby.

         In the event  that any of the  Buildings  is  damaged  by fire or other
casualty,  and less than 25,000 square feet of rentable office space has been so
damaged,  this  Agreement  shall  remain in full force and effect.  In the event
Seller expends any money in repairing any such casualty damage prior to Closing,
then  Seller  shall be  entitled  to a portion of  insurance  proceeds  equal to
Seller's expenditures.  Prior to Closing, Seller shall provide to Buyer evidence
of such  expenditures.  All remaining  insurance  proceeds  shall be assigned to
Buyer and all remaining sums received by Seller in connection therewith shall be
paid over to Buyer, and all rights to claims shall be assigned to Buyer.

         Seller  shall not settle or  compromise  any claims  without  obtaining
Buyer's prior written consent.

15.      Eminent Domain.

         In  the  event  Seller   receives   any  notice  of  any   condemnation
proceedings,  or other  proceedings  in the  nature  of  eminent  domain it will
forthwith  send a copy of such notice to Buyer.  If ten percent (10%) or more of
any of the  Buildings  or Parcel or all of them is proposed to be or is taken by
eminent domain,  Buyer may, within twenty (20) days of receipt of such notice of
condemnation, upon written notice to Seller, elect to cancel this Agreement, and
in such  event the  Deposit  together  with  interest  earned  thereon  shall be
returned to Buyer and neither party shall have any further rights or obligations
hereunder  and this  Agreement  shall be null and void. If all or any portion of
the  Buildings  or  Parcel  or all of them  has  been or is  hereafter  taken or
condemned and this Agreement is not cancelled,  Seller shall, at Closing, credit
or assign to Buyer  all of  Seller's  right,  title and  interest  in and to any
actions, claims, awards in condemnation, or damages of any kind, to which Seller
may have become entitled or may thereafter be entitled by reason of any exercise
of the  power  of  eminent  domain  with  respect  to or for the  taking  of the
Buildings, the Parcel or any portion thereof.
<PAGE>
16.      Default.

         A.       Buyer's Default.

                  In the event Buyer  defaults in its  performance  of any term,
covenant,  condition or obligation  under this Agreement,  Seller's sole remedy,
legal and equitable,  shall be to retain the Deposit to the extent  delivered to
the Title  Company at the time of the default,  and interest  earned  thereon as
liquidated  damages,  it being  understood that the exact amount of damages that
Seller will  sustain is difficult  of  determination  and that the amount of the
liquidated  damages  provided  herein is a reasonable  estimate of the amount of
damages Seller will sustain. Seller waives all other remedies. Buyer consents to
the  jurisdiction  of the Court of Common Pleas of Delaware  County,  and of the
United States District Court for the Eastern District of Pennsylvania and agrees
that service may be made upon Buyer by registered or certified U.S. Mail.

         B.       Seller's Default.

                  In the event Seller defaults in its obligations to close under
this Agreement,  Buyer shall be entitled to (a) enforce specific  performance of
this  Agreement  with an abatement  of the Purchase  Price in an amount equal to
Buyer's  costs and  expenses in  enforcing  its remedy of specific  performance,
including  without  limitation,  reasonable  attorney's  fees,  plus the damages
suffered by Buyer as measured by the  difference  between the return to Buyer of
interest  earned on the purchase money and the return from operating  income and
rents that Buyer would have earned had the sale been  completed as  contemplated
hereby,  during such  period  between  December  6, 1996,  and the date on which
Closing  actually  occurs;  or (b) to terminate this Agreement and to bring suit
for  all of  Buyer's  costs  and  expenses  incurred  in  connection  with  this
Agreement,  including  without  limitation,  reasonable  attorney's  fees  (both
in-house and outside  counsel) and fees of engineers and consultants and to have
the  Deposit  returned.  In the event  Seller  breaches  any  representation  or
warranty made or given by Seller in this  Agreement,  Buyer shall be entitled to
bring suit  against  such Seller or Seller  breaching  such  representations  or
warranties  for all  damages  suffered  by Buyer,  and all  costs and  expenses,
including  without  limitation,  reasonable  attorney's  fees (both in-house and
outside counsel) and fees of engineers and consultants; provided, however, in no
event shall the liability of Seller  hereunder,  in the aggregate of all claims,
exceed  Two  Million  Dollars  ($2,000,000).  The  foregoing  shall  be the sole
remedies available to Buyer.  Seller agrees that service may be made upon Seller
by registered or certified U.S. Mail.

                  In the event of a default by any one Seller, each other Seller
agrees that this  Agreement  shall  remain in full force and effect  against it,
notwithstanding  anything to the contrary  contained herein,  and this Agreement
shall   continue  and  be  extended  until  such  time  as  there  is  a  final,
nonappealable  resolution  of  any  claims  that  Buyer  may  have  against  the
defaulting Seller.
<PAGE>
17.      Notices.

         All notices  required or  permitted to he given  hereunder  shall be in
writing and sent by  registered  or certified  mail,  postage  prepaid,  or by a
recognized overnight delivery service addressed as follows:

                    If to Seller:             David C. Henderson
                                              200 Stevens Drive, Suite 210
                                              Lester, PA 19113

                    with a copy to:           Norman C. Henss, Esquire
                                              200 Stevens Drive, Suite 210
                                              Lester, PA 19113

                    with a copy to:           John C. Halderman, Esquire
                                              PECO Energy Company
                                              2301 Market Street
                                              S23-1
                                              Philadelphia, PA 19103

                    If to Buyer:              John R. Cali
                                              Chief Administrative Officer
                                              Cali Realty Corporation
                                              11 Commerce Drive
                                              Cranford, NJ 07016

                    With copy to:             Roger W. Thomas, Esquire, Counsel
                                              Cali Realty Corporation
                                              11 Commerce Drive
                                              Cranford, NJ 07016

                    And with copy to:         Andrew S. Levine, Esquire
                                              Pryor, Cashman, Sherman and Flynn
                                              410 Park Avenue
                                              New York NY 10022

or to such other  person or address as the party to be charged  with such notice
may designate by notice given in the aforesaid  manner.  Notices shall be deemed
given on the second day after  deposit  in the  United  States  Mail or the next
business day after deposit with a recognized overnight delivery service. Notices
given  by  counsel  for the  parties  shall  be  deemed  given  by the  party so
represented.

18.      Brokerage.

         Buyer  warrants and  represents  to Seller that the only brokers of any
kind that Buyer has dealt with in regard to this transaction
are Joseph  Vedejo of Jackson  Cross  Company  and Robert R.  Powell of Vanguard
Commercial  Mortgage  (the  "Broker")  who have  acted as joint  brokers on this
transaction.  Seller shall be liable for the  commission due Broker with respect
to  this  transaction  and  for any  brokerage,  finders  or  similar  feels  or
commissions due to any other party by reason by these  transactions;  and Seller
shall  defend,  indemnify  and hold Buyer  harmless  from all claims of any such
party   claiming  to  have  had  contact   with  Seller  with  regard  to  these
transactions. The provisions of this paragraph shall survive Closing.
<PAGE>
19.      Escrow Agreement.

         Upon the signing of this Agreement by the parties,  Buyer shall deliver
the First Deposit to the Title Company,  as escrow agent. The parties agree that
the First Deposit and the Second Deposit or the Letter of Credit Deposit, as the
case may be, when and if delivered, shall be held by the Title Company in escrow
and disposed of only in accordance with the provisions of this Paragraph 19. The
parties   agree  that  the  Deposit   shall  be   invested   in  an   assignable
interest-bearing  certificate  of deposit,  money market fund,  treasury bill or
other similar security  approved by Seller and Buyer, and all interest  accruing
thereon shall be paid to Buyer, except as otherwise provided herein. Buyer shall
be responsible for the payment of any taxes due on the interest earned,  if any,
on the Deposit.

         A. The Title Company will deliver the Deposit to Seller or to Buyer, as
the case may be, under the following conditions:

                  (1) If not in the form of the  Letter  of Credit  Deposit,  to
Seller  on the  Closing  Date for the  account  of  Buyer  provided  Closing  is
completed;

                  (2) If in the form of the Letter of Credit  Deposit,  to Buyer
on the Closing Date provided Closing is completed;

                  (3) If Buyer fails to close,  Seller,  upon receipt of written
demand therefor, such demand stating that Buyer has defaulted in the performance
of this Agreement and specifically setting forth the basis for such default. The
Title  Company  shall not honor such  demand  until more than ten (10) days have
elapsed  after the Title  Company  has mailed a copy of such demand to Seller or
Buyer,  as the case may be,  nor  thereafter  if the Title  Company  shall  have
received  written  notice  of  objection  from  Buyer  in  accordance  with  the
provisions of clause B of this Paragraph 19; or

                  (4) To Buyer upon  receipt of written  demand  therefor,  such
demand  stating that this Agreement has been  terminated in accordance  with the
provisions hereof, or Seller has defaulted in the performance of this Agreement,
and  specifically  setting forth the basis for the same. The Title Company shall
not honor such demand until more than ten (10) days have elapsed after the Title
Company has mailed a copy of such demand to Seller or Buyer, as the case may be,
nor  thereafter,  if the Title  Company shall have  received  written  notice of
objection from the other party in accordance  with the provisions of clause B of
this Paragraph 19.

         B. Upon the  filing of a written  demand  for the  Deposit  by Buyer or
Seller, pursuant to subclause 3 or 4 of clause A of this Paragraph 19, the Title
Company shall  promptly mail a copy thereof to the other party.  The other party
shall have the right to object to the delivery of the Deposit by filing  written
notice of such objection with the Title Company at any time within ten (10) days
after the mailing of such copy to it, but not thereafter.  Such notice shall set
forth the basis for  objecting to the  delivery of the Deposit.  Upon receipt of
such notice,  the Title Company shall  promptly mail a copy thereof to the party
who filed the written  demand.  In the event that  Closing is not  completed  by
<PAGE>
December 10, 1996, then Title Company shall thereafter promptly make demand upon
the issuer of the  Letter of Credit for  payment  thereof.  Upon  receipt of the
proceeds, Title Company shall deposit the same in an account as specified in the
first  paragraph of this Paragraph 19 and shall hold such proceeds in accordance
with the provisions hereof. In the event that the issuer of the Letter of Credit
refuses to honor payment thereof,  Title Company shall promptly notify Buyer and
Sellers, who jointly shall enforce collection thereof.  Buyer further guarantees
the payment of the Letter of Credit  proceeds from the issuer and will be liable
to make payment immediately if the issuer refuses to do so. If the issuer of the
Letter of Credit fails to pay the proceeds  over to Title  Company  after demand
for honor is made by Title Company,  Buyer agrees that interest on the amount of
the Letter of Credit  Deposit  shall  accrue,  and if Seller is  entitled to the
Deposit,  at an annual rate of six percent (6%),  until such time as such demand
is honored.

         C. In the event the Title  Company  shall have  received  the notice of
objection provided for in clause B above and within the time therein prescribed,
the Title Company shall continue to hold the Deposit until (i) the Title Company
receives written notice from Seller and Buyer directing the disbursement of said
Deposit,  in which case,  the Title  Company shall then disburse said Deposit in
accordance  with  said  direction,  or (ii) in the event of  litigation  between
Seller and Buyer,  the Title  Company  shall deliver the Deposit to the Clerk of
the Court or the office of Judicial  Support,  as the case may be, in which said
litigation is pending,  or (iii) the Title Company takes such affirmative  steps
as the Title Company may, in the Title Company's  reasonable  opinion,  elect in
order to terminate the Title  Company's  duties  including,  but not limited to,
depositing  the Deposit with the Court and bringing an action for  interpleader,
the costs  thereof  to be borne by  whichever  of Seller or Buyer is the  losing
party.

         D. The  Title  Company  may act upon any  instrument  or other  writing
believed by it in good faith to be genuine and to be signed and presented by the
proper person and it shall not be liable in connection  with the  performance of
any duties imposed upon the Title Company by the  provisions of this  Agreement,
except  for  damage  caused by the Title  Company's  own  negligence  or willful
default. The Title Company shall have no duties or responsibilities except those
set forth herein.  The Title Company shall not be bound by any  modification  of
this  Agreement,  unless the same is in writing  and signed by Buyer and Seller,
and, if the Title  Company's  duties  hereunder are  affected,  unless the Title
Company shall have given prior written  consent  thereto.  In the event that the
Title  Company  shall be  uncertain as to the Title  Company's  duties or rights
hereunder,  or shall receive  instructions  from Buyer or Seller  which,  in the
Title Company's opinion,  are in conflict with any of the provisions hereof, the
Title Company shall be entitled to hold and apply the Deposit pursuant to clause
C above and may decline to take any other  action.  The Title  Company shall not
charge a fee for its services as escrow agent.

         E. The Title Company shall not be:

                  (1)  Responsible  for any  loss  or  delay  occasioned  by the
closure or insolvency or the financial  institution  into which it deposited the
Deposit;

                  (2)  Responsible  for the dishonor of any check,  money order,
draft,  negotiable  instrument,  or other  financial  document,  received as the
Deposit; and
<PAGE>
                  (3) Liable for any error of  judgement  or for any act done or
omitted in good faith,  or for anything which it may in good faith do or refrain
from doing in connection herewith.

         F.  Buyer  and  Sellers  hereby  indemnify  and agree to save the Title
Company harmless from all liability,  loss, damage,  reasonable  attorney's fees
and expenses,  arising out of this Paragraph and its duties hereunder;  save and
except however any liability,  loss,  damage,  attorney's  fees and/or  expenses
caused by Title Company's fraud, negligence or willful default.

         G. The  Title  Company  shall  have the  authority  to deduct or offset
against the Deposit the following items: (1) Title Company's  attorney's fees as
provided under Paragraph 19.F; and (2) Title Company's loss,  damage or expenses
as provided under Paragraph 19.F.

20.      Entire Agreement.

         This  Agreement  contains  the entire  agreement  between  the  parties
relating  to the  purchase  and sale of the  Property.  All  prior  negotiations
between  the  parties are merged in this  Agreement  and there are no  promises,
agreements,  conditions,  undertakings,  warranties or representations,  oral or
written,  express or implied,  between  them other than as herein set forth.  No
change or  modification  of this Agreement  shall be valid unless the same is in
writing and signed by the parties hereto.  No waiver of any of the provisions of
this Agreement and other agreements reflected to herein shall be valid unless in
writing and signed by the party against whom it is sought to be enforced.

21.      Captions.

         The captions  contained  herein are not a part of this Agreement.  They
are only for the  convenience of the parties and do not in any modify,  amplify,
or give meaning to any of the terms, covenants or conditions of this Agreement.

22.      Miscellaneous.

         A. This Agreement  shall not be recorded in the office for recording of
deeds or in any other office or place of public record.

         B. This Agreement shall be construed and interpreted in accordance with
the laws of the Commonwealth of Pennsylvania.

         C. In the event  any one or more of the  provisions  contained  in this
Agreement are held to be invalid, illegal, or unenforceable in any respect, such
invalidity, illegality, or unenforceability will not affect any other provisions
hereof,  and this Agreement shall be construed as if such invalid,  illegal,  or
unenforceable provision had not been contained herein.

         D. This  Agreement  may be assigned by Buyer in its sole  discretion to
any other  entity which  controls,  is  controlled  by, or which is under common
control with,  the Buyer,  and may be assigned by Buyer to any other third party
upon the prior  written  consent of  Seller,  which  such  consent  shall not be
unreasonably withheld or delayed.

         E. Any paragraph headings or captions contained in this Agreement shall
be for  convenience of reference only and shall not affect the  construction  or
interpretation of any provisions of this Agreement.
<PAGE>
         F.  Seller  and Buyer  hereby  agree to  cooperate  with each  other in
accomplishing  each  and  every  condition  precedent  to  Closing  contemplated
hereunder,  and to that end agree,  when necessary,  to join in all applications
and to execute all other documents,  declarations and maps required to be signed
by  either  of them for  such  purpose  provided  that  Seller  shall be given a
reasonable  opportunity to review any documents required in connection hereunder
and such inspection shall involve no cost or expense to Seller.

         H. When the context of this Agreement so requires,  nouns  appearing in
the singular shall have the same effect as if used in the plural and vice versa,
and the proper gender shall be attributed to all pronouns.

         I. The date of this Agreement shall be the date on which it is executed
by all  parties  or,  if not  executed  simultaneously,  the date on which it is
executed by the last of the  parties,  which date will be inserted at the top of
the first page hereof.

         J. No waiver by either  party or any  failure  of, or  refusal  by, the
other party to comply with its obligations  under this Agreement shall be deemed
a waiver of any other or subsequent failure or refusal to so comply.

         K. The individuals  executing this Agreement represent and warrant that
they have full authority  and/or have been duly  authorized by their  respective
parties to do so on behalf of such parties.

         L. The parties waive the formal  requirements for tender of payment and
deed. The parties agree that all times are of the essence.

         M. It is the express intention of the parties that all representations,
warranties and indemnities contained in Paragraphs 9.A. (2), (3), (4), (7), (8),
(9), (13),  (14), (15), (18), (20), (21), (22), (23), (24), (25), (26), and (27)
of this Agreement shall survive Closing,  or the Parcel Closing, as the case may
be, the delivery of the deed and the  conveyance of the Buildings and the Parcel
and shall not merge into the deed,  for a period of one (1) year  following  the
Closing   or  the  Parcel   Closing,   as   appropriate,   except  as  to  those
representations,  warranties and indemnities of Seller set forth in Paragraph 25
which shall survive for a period of two (2) years from the Closing or the Parcel
Closing, as appropriate. To the extent an Estoppel Letter has been obtained with
respect to a Lease, then the  representations and warranties given in Paragraphs
9.A.(3) and (4) as they relate to such Lease,  shall not survive  Closing.  Suit
must  be  instituted  for  damages  for  the  breach  of  such  representations,
warranties  and  indemnities  within  the one (1)  year or two (2)  year  period
respectively. Suit may not be instituted for such breach unless Closing has been
consummated.  If the  representations,  warranties  and  covenants  contained in
Paragraph   9.A  and   Paragraph   25  do  not   survive   Closing,   then  such
representations,  warranties and covenants will be deemed  conditions of Closing
for which no suit or damages may be brought.  If Buyer has actual  knowledge  of
such breach of representations, warranties and covenants prior to or at Closing,
Buyer may terminate the  Agreement  for breach of said  condition;  but if Buyer
closes after such knowledge, Buyer shall be deemed to have waived such breach.

         N. This  Agreement  shall  inure to the benefit of and shall be binding
upon the parties hereto and their respective heirs, administrators,  successors,
executors and assigns.

         O. The  Legislature  has  established a Real Estate  Recovery Fund. The
purpose of the fund is to  compensate  persons who obtain a judgment  because of
the fraud,  misrepresentation  or deceit of an agent.  For  further  information
concerning the Recovery Fund telephone: (717) 783-3658.
<PAGE>
         P.  Whenever  used in  this  Agreement,  the  phrases  "to the  best of
Seller's  knowledge",  "Seller has no knowledge  of",  and like  qualifications,
shall mean that Wilbur C. Henderson,  David C. Henderson,  Patrick G. Tomlinson,
Richard L. Phillips,  Norman C. Henss, Kathy Santangelo and Annamarie Donley who
have  responsibility  for the  operation,  construction,  use and leasing of the
Buildings  or  Parcel,  have  actual  knowledge  or  knowledge  of  any  written
information,  notice or demand, after reasonable due diligence,  with respect to
such  referenced  fact,   condition  or  circumstances,   without  any  duty  to
independently  investigate such matter beyond Seller's Books and Records,  Plans
and files.

23.      Leasing Buildings.

         Seller  shall not enter into any new leases for the  Buildings or elect
to renew or amend any  existing  Leases  without  the prior  written  consent of
Buyer,  which consent shall not be  unreasonably  withheld during the Inspection
Period. In the event Buyer consents to any new lease or any renewal or amendment
of any existing Lease and Closing occurs, the Buyer shall be responsible for the
costs of any  tenant  improvements  and  broker  commissions  due in  connection
therewith.

24.      Confidentiality.

         The parties agree that each of them shall keep as confidential  (except
that  each may make  disclosures  to its  counsel,  advisors,  consultants,  and
contractors) the negotiations of this  transaction,  that this Agreement of Sale
has been executed,  and all of the details included in this Agreement until such
time as Buyer may be required to make such facts  known in  accordance  with the
rules  and  regulations  of  the  federal  and  state  securities  and  exchange
commissions and authorities.

25.      Environmental Representations and Indemnity.

         A. Each Seller  represents and warrants with respect to the Building or
Parcel that it owns that:

                  (1) Except as may be set forth in the  Environmental  Reports,
as hereinafter defined, to the best of Seller's knowledge, there is not present,
petroleum or any hazardous or toxic waste or hazardous  substance or contaminant
or  pollutant   (collectively,   "Contaminants"),   except  in  compliance  with
Environmental  Laws,  and  there  has  been  no  discharge,  release,  spillage,
controlled  loss,  seepage or  filtration or the like of  Contaminants  (each an
"Environmental   Event")   as  those   terms  are  used  in  the   Comprehensive
Environmental Response,  Compensation and Liability Act of 1980 ("CERCLA"),  the
Resource  Conservation and Recovery Act, the Clean Water Act, the Clean Air Act,
the Federal Water Pollution Control Act, the Pennsylvania Solid Waste Management
Act, the  Pennsylvania  Clean Streams Law, or any other federal,  state or local
law,  rule,   regulation,   statute  or  order   governing   Contaminants,   the
construction,  use and maintenance of improvements,  the discharge or release of
any  Contaminants,  the fill of any  wetland or the  installation  or use of any
tank,  above or below ground,  as such laws exist or may be amended from time to
time (collectively,  the "Environmental  Laws") in, on, over, under or migrating
from the  Buildings or the Parcel or any real estate  contiguous to the Building
or the Parcel.
<PAGE>
                  (2)  Seller has not  caused  and  Seller  shall not  knowingly
permit to exist,  any  conditions on the Buildings or the Parcel in violation of
Environmental  Laws in,  upon,  over,  under or  migrating  from or  within  the
Buildings or the Parcel or on any real estate contiguous to the Buildings or the
Parcel.

                  (3) Seller has not and shall not  knowingly  permit any person
or entity to engage in any activity on the  Buildings or the Parcel in violation
of an Environmental Law.

                  (4)  Seller  has not,  and  except  as may be set forth in the
Environmental Reports, to best of Seller's knowledge no one else has, discharged
any dredge or fill material into any "wetland" or "waters of the United  States"
or "waters of the  Commonwealth of  Pennsylvania" on the Buildings or the Parcel
or  property  adjacent  thereto,  as those  terms are  defined  in the rules and
regulations  promulgated  pursuant  to the Clean Water Act or the Dam Safety and
Encroachments  Act or other  applicable  federal,  state or local  wetland  law.
Seller  has  not  received  any  notices,  claims  or  other  correspondence  or
communication  from the United  States Army Corps of Engineers or from any other
governmental  authority  with respect to wetlands on the Parcel,  except such as
are identified in Exhibit F.

                  (5) Seller has  provided  Buyer with and shall  direct  within
three (3) days of the date hereof in writing (a  courtesy  copy of which will be
provided to Buyer) all of its environmental consultants, engineers and agents to
promptly  provide to Buyer copies of all: (A) permits,  licenses,  certificates,
registrations,  approvals, and any amendments thereto acquired for the Buildings
and the Parcel and for the conduct of Seller's  activities at or the  activities
of any Tenant (to the extent in their  respective  possession) the Buildings and
the Parcel pursuant to Environmental  Laws, which Seller believes constitute all
of the permits, licenses, certificates, registrations, and approvals that Seller
believes are  required for the  foregoing;  (B)  applications,  reports or other
materials  submitted  by or on  behalf  of  Seller,  or to the  extent  in their
respective  possession,  by any Tenant, to any governmental agency in connection
with  any  Environmental  Laws;  (C)   correspondence,   notices  of  violation,
summonses, orders,  administrative,  civil or criminal complaints,  requests for
information by governmental authorities or other documents received by Seller or
its  counsel  or  environmental   consultants   pertaining  to  compliance  with
Environmental Laws or the generation,  storage, treatment,  handling, discharge,
emission,  release or migration of any  Contaminants  on, over,  under,  from or
affecting  the  Buildings  and the  Parcel;  (D)  records  and  analyses  of any
environmental  tests  pertaining  to the  Buildings  and the  Parcel  including,
without  limitation,  the  results of any air,  water or soil  analyses  or tank
integrity  testing which are in the  possession of Seller or any managing  agent
for the  Buildings  or the Parcel or the  existence of which is known to Seller;
and  (E)  all   materials   relating   to   wetlands   delineations,permits   or
investigations  with respect to the  Buildings  or the Parcel,  which are in the
possession,  control or custody of Seller or any managing agent  responsible for
the management of the Buildings or the Parcel.  All of the foregoing (A) through
(E) are sometimes hereinafter referred to as the "Environmental Reports" and are
listed on Exhibit "F", attached hereto and made a part hereof.
<PAGE>
                  (6) No civil, criminal or administrative proceeding is pending
or, to the best of Seller's knowledge, threatened relating to Environmental Laws
or Contaminant  in, on, over,  under,  or migrating  from the Property;  neither
Seller  nor any of its  agents  has  received  any  notice  of  violation  or of
potential  liability regarding the Buildings or the Parcel or activities thereon
relating to Environmental  Laws or Contaminants in, on, over, under or migrating
from the Buildings and the Parcel;  notwithstanding  the foregoing,  the parties
recognize  that the  creek  transversing  the  Buildings  or the  Parcel  may be
contaminated;  Seller has not entered into any consent  order,  consent  decree,
administrative  order,  judicial order or settlement  relating to  Environmental
Laws or  Contaminants  in, on, over,  under, or migrating from the Buildings and
the Parcel  except as may be  required  in  connection  with the  request  for a
Wetlands  Delineation  (as  hereinafter  defined)  pursuant to Paragraph  26.C.,
copies of which have been or shall be provided to Buyer.

                  (7) To the best of Seller's knowledge,  no underground storage
tanks have been removed from the Buildings or the Parcel.

                  (8) All permits,  licenses,  certificates,  registrations  and
approvals  acquired  for the  Buildings  and the  Parcel,  copies of which  were
supplied  to  Buyer  pursuant  to  Paragraph  (5)  above,   and  to  the  extent
transferrable,  shall  be  transferred  with  the  Property  to  Buyer,  without
additional  payment by the Buyer to the Seller but at Buyer's  cost  (other than
Seller's  legal fees),  and shall,  upon  Closing,  be  transferred  to Buyer by
Seller.

         B. Seller hereby agrees to  indemnify,  defend and save Buyer  harmless
from and against any and all loss, damage, liability,  penalties,  fines and the
like,  of  whatever  nature,   including  without  limitation,   attorneys'  and
environmental  expert  fees  should  any of  the  foregoing  representations  or
warranties set forth in this Paragraph 25 prove to be untrue or inaccurate.

         C. The provisions of this Paragraph 25 shall survive the Closing, as to
the Buildings, and the Parcel Closing, as to the Parcel, for a period of two (2)
years.

26.      Parcel Option.

         A. In  addition  to the  rights of Buyer set forth  above,  during  the
period commencing on the date of Closing and terminating on the date that is the
day  immediately  preceding the fourth  anniversary  of the date of Closing (the
"Option Period"),  Buyer shall have the right, from time to time, to acquire the
Parcel by written notice to Seller.  Such written notice shall be effectuated by
Buyer  forwarding to Seller, a notice (the  "Acquisition  Notice") setting forth
the purchase price determined in accordance with  Subparagraph C. below, and the
entity to which the Parcel is to be conveyed (if different from Buyer).  Closing
of title on the Parcel shall take place within ten (10) days  following the date
of the  Acquisition  Notice,  but in no event  shall said date be later than the
last day of the Option Period.
<PAGE>
         B. Seller hereby grants Buyer an irrevocable  and  continuous  right of
access to the Parcel during the Option  Period.  Seller further grants Buyer the
right to pursue any and all course of action in the development of the Parcel or
portions  thereof,  but not to obtain  any final  approvals,  including  without
limitation,  the  right  to  apply  for and  prosecute,  subdivisions  and  land
development  applications,  approvals,  zoning  approvals,  variances  and other
zoning  relief,   permits,  or  any  other  governmental   action,   license  or
certification  required in connection with the development of the Parcel. Seller
agrees  to  cooperate  with  the  Buyer  in  pursuing  the  approvals,  permits,
variances,  etc.  outlined  above prior to the Parcel Closing and to execute and
deliver such applications, consents, and instruments in connection therewith, as
Buyer may reasonably request;  however, under no circumstances is this Agreement
deemed  to be  conditioned  upon  the  Buyer's  success  in  achieving  any such
approval,  consent or permit, nor shall the Seller be required to expend any sum
of money in connection with its agreement to cooperate.

         C. Prior to the Parcel  Closing,  Henderson  & Son and David  Henderson
shall obtain,  at their sole cost and expense,  a delineation of the wetlands on
the Parcel,  concurred  with by the United  States Army Corps of Engineers  (the
"Corps") through a jurisdictional  delineation as evidenced by a letter from the
Corps (the  "Wetlands  Delineation").  In the event that because of the Wetlands
Delineation under zoning and land development and environmental  laws, codes and
ordinances and other laws and regulations  applicable to the Parcel, as a matter
of right,  without  the need for any relief  ("Development  Conditions"),  there
cannot be constructed on the Parcel at least 135,000 square feet of office space
in a four-story  building  with parking  therefore at a ratio of four (4) spaces
per 1,000  square  feet of space,  then the  Individual  Purchase  Price for the
Parcel shall be adjusted downward to be equal to the product of 14.81 multiplied
by the number of square feet of office space with  parking  therefore at a ratio
of four (4) spaces per 1,000 square feet of space that can be so  constructed on
the Parcel. If, with the Wetlands  Delineation,  less than 80,000 square feet of
office  space  with  parking  therefore  at a ratio of four (4) spaces per 1,000
square  feet  of  space  can  be  built  on the  Parcel  under  the  Development
Conditions,  then Buyer shall have no  obligation  whatsoever  to  purchase  the
Parcel.  Such determination  shall be made by Buyer within sixty (60) days after
Buyer's receipt of the Wetlands  Delineation.  Except as set forth above,  Buyer
shall bear the risk of any change in the zoning of the Parcel.

         D. All of the terms and conditions  set forth in this  Agreement  shall
apply to the  acquisition of the Parcel  pursuant to an Acquisition  Notice or a
Put Notice, as hereinafter defined, and shall govern and control unless modified
pursuant to a written  instrument  executed by both  parties.  The parties shall
comply with the terms, covenants,  conditions,  obligations and requirements set
forth above, as and to the extent such are applicable to the Parcel.

         E. If Buyer has not acquired the Parcel by the date that is thirty (30)
days prior to the end of the Option Period, Seller shall have the right, but not
the  obligation,  to give Buyer a written  notice (the "Put  Notice")  requiring
Buyer to purchase and close title on the Parcel by the  expiration of the Option
Period.  If Buyer  fails to close  title on the  Parcel by the end of the Option
Period,  Buyer shall be deemed to be in default  hereunder  and the Seller shall
have  the  right to  retain  the  Deposit  (as  reduced  following  Closing)  as
liquidated damages.

         F. The parties agree that between the date hereof and the expiration of
the  Option  Period,  in  addition  to all of  their  respective  covenants  and
agreements contained elsewhere in this Agreement,  they shall perform or observe
the following with respect to the Parcel:
<PAGE>
                  (1) Seller  shall be  responsible  for all, and shall pay when
due, real estate taxes on the Parcel until actually conveyed to Buyer.

                  (2)  Seller  agrees  that it  shall  not  voluntary  cause  or
voluntary  permit  the  Parcel,  or  any  interest  therein,  to  be  mortgaged,
encumbered, transferred, conveyed, leased or assigned during the Option Period.

                  (3) Buyer shall be responsible for the general  maintenance of
the Parcel,  including the cutting of grass to the extent Buyer deems  necessary
and only to the extent permitted by Environmental Laws.

         G. Simultaneous with the execution of this Agreement, the parties shall
execute a memorandum  (the  "Memorandum"),  in recordable  form,  evidencing the
respective  rights  and  obligations  of the  parties  hereto  (other  than  the
Individual  Purchase Price for the Parcel) and either party shall have the right
to cause said  memorandum to be recorded in the Recorder of Deed's Office in and
for Delaware County,  Pennsylvania  only after Closing of title to the Buildings
has taken place and only if, prior thereto, Buyer executed, in proper recordable
form, an agreement terminating the Memorandum  ("Termination  Agreement") (which
instrument  shall  evidence a  termination  and release of the  Memorandum)  and
places same in escrow  with Title  Company.  The  Termination  Agreement  may be
released by Title  Company  upon the earlier of (i)  Buyer's  default  hereunder
after  notice and a fifteen (15) day  opportunity  to cure or (ii) ten (10) days
after the end of the Option Period.

         F. At the  Closing,  Buyer  shall  cause Cali to execute and deliver to
Seller,  an agreement by which Cali agrees to guaranty the  obligations of Buyer
to purchase the Parcel pursuant to this Paragraph 26,  substantially in the form
of Exhibit "G", attached hereto and made a part hereof.
 

         IN WITNESS WHEREOF,  the parties hereto,  intending to be legally bound
hereby,  have  caused this  Agreement  to be signed the day and year first above
written.

                                     SELLER:

[corporate seal]                              HENDERSON/TINICUM PARTNERSHIP
                                     By: HENDERSON DELAWARE CORP., general
                                     partner

Attest:____________________
By:_________________________________
                                                              President

                       [Signatures Continued on Next Page]

<PAGE>

[corporate seal]                                HENDERSON LESTER CORP., general
                                                partner

Attest:____________________
By:_________________________________
                                    President

                                                INTERNATIONAL COURT II LIMITED
PARTNERSHIP

[corporate seal]                                By: HENDERSON INTERSTATE CORP.,
its sole                                        general partner

Attest:____________________
By:_________________________________
                                    President

                                                INTERNATIONAL COURT III JOINT
VENTURE

[corporate seal]                                By: HENDERSON STEVEN CORP.,
general partner

Attest:____________________
By:_________________________________
                                    President

[corporate seal]                                ADWIN REALTY COMPANY, general
partner

Attest:____________________
By:_________________________________
                                    Vice-President


[corporate seal]                                WILBUR C. HENDERSON & SON

Witness:____________________
By:_________________________________
                                                General Partner

Witness:
By:_________________________________
                                                General Partner

Witness:
- ------------------------------------
                                                DAVID C. HENDERSON
<PAGE>


                                     BUYER:

[corporate seal]                                CALI REALTY ACQUISITION
CORPORATION

Attest:____________________
By:_________________________________


         The  undersigned  joins in this  execution  of this  Agreement  for the
limited purposes of  acknowledging  its receipt of the Deposit and its agreement
to hold the Deposit in escrow in accordance with the terms hereof.

                                  ESCROW AGENT:
[corporate seal]


Attest:_____________________
By:_________________________________









                                 EXHIBIT 10.55

<PAGE>
                         AMENDMENT TO AGREEMENT OF SALE
                                    PARCEL II
                             AIRPORT BUSINESS CENTER
                              TINICUM TOWNSHIP, PA


         THIS  AMENDMENT  is made this 3rd day of December,  1996,  by and among
HENDERSON/TINICUM PARTNERSHIP, a Pennsylvania general partnership, INTERNATIONAL
COURT II LIMITED PARTNERSHIP, a Pennsylvania limited partnership,  INTERNATIONAL
COURT III JOINT VENTURE, a Pennsylvania general partnership, WILBUR C. HENDERSON
& SON, a Pennsylvania general partnership, and DAVID C. HENDERSON, an individual
(hereinafter  collectively  referred to as "Sellers"  and each  individually  as
"Seller"),  and  CALI  REALTY  ACQUISITION  CORPORATION  ("Buyer"),  a  Delaware
corporation.

                                   BACKGROUND

         A.  Sellers and Buyer have  entered  into a certain  Agreement  of Sale
dated October 23, 1996 (the "Agreement of Sale"),  pursuant to which each Seller
agreed  to sell to Buyer  certain  property  owned by it,  and  Buyer  agreed to
purchase from each Seller such property,  all of which such property is commonly
known as the  Airport  Business  Center,  Parcel  II,  and is located in Tinicum
Township,  Delaware  County,  Pennsylvania,  and  more  fully  described  in the
Agreement of Sale.

         B. The  Sellers  and Buyer  desire to amend  the  Agreement  of Sale to
provide for an extension of the Inspection Period and the Closing period, and to
clarify the length of the Option Period as defined in the Agreement of Sale.

         C. Capitalized  terms used herein but not defined herein shall have the
meaning ascribed to such terms in the Agreement of Sale.

         NOW, THEREFORE,  for good and valuable  consideration,  the receipt and
sufficiency of which are acknowledged, and intending to be legally bound hereby,
the parties agree as follows:

         1. Inspection Period. The Inspection Period shall expire on December 3,
1996.

         2.  Closing.  Closing,  if  required to be made,  shall  occur  between
December 9, 1996, and December 13, 1996.

         3. Title.  Pursuant to Paragraph 4.A, Buyer timely  provided to Sellers
Buyer's  Title Notice in which Buyer listed as a Non-  Permitted  Exception  the
Declaration  of  Protective   Covenants  and  Easements  and  related  Declarant
Assignment  appearing  as items 9 and 7,  respectively,  on the Title  Company's
title commitment (collectively the "Declaration").

                  Seller  timely  responded  that  it is  unable  to  cause  the
Declaration  to be  completely  removed of record.  The parties agree to discuss
what changes and amendments to the Declaration are desired by Buyer and what, if
any, relief can be  accomplished.  Accordingly,  the parties agree that the time
period in which Buyer must elect to either take title subject to the Declaration
or to terminate the Agreement of Sale, is extended to December 3, 1996.
<PAGE>
         4. Parcel Option.  The Option Period shall be the three (3) year period
commencing  on the date of Closing and  terminating  on the date that is the day
immediately preceding the third anniversary of the date of Closing.

         5. No Other Changes.  Except as specifically  amended by the foregoing,
all of the terms, conditions,  covenants and agreements in the Agreement of Sale
dated October 23, 1996 shall remain unaltered and of full force and effect.

         6.  Miscellaneous.  This  Amendment  shall be  governed  and  construed
according to the laws of the Commonwealth of Pennsylvania.  This Amendment shall
inure to the  benefit  of, and be binding  upon,  the  parties  hereto and their
respective successors and assigns.

         7.  Counterparts.  This  Amendment  may be  executed  in  one  or  more
counterparts,  each of which  shall be deemed to be an  original as to any party
whose  signature  appears  thereon,  and all of which when taken  together shall
constitute one and the same instrument.  The parties agree to accept and rely on
fascimile copies of signatures as originals.

         IN WITNESS WHEREOF,  the parties hereto,  intending to be legally bound
hereby,  have  caused this  Agreement  to be signed the day and year first above
written.

                                     SELLERS:

                                     HENDERSON/TINICUM PARTNERSHIP

                                 By: _________________________________

                                     HENDERSON DELAWARE CORP., general
                                     partner

                                 By: HENDERSON LESTER CORP., general partner

                                 By: _________________________________

                                     INTERNATIONAL COURT II LIMITED PARTNERSHIP

                                 By: HENDERSON INTERSTATE CORP., its sole
                                     general partner

                                 By:_________________________________


                                     INTERNATIONAL COURT III JOINT VENTURE

                                 By: HENDERSON STEVEN CORP., general partner

                                 By:_________________________________

<PAGE>
                                     ADWIN REALTY COMPANY, general partner

                                 By:_________________________________

                                     WILBUR C. HENDERSON & SON

                                 By:_________________________________
                                     General Partner

                                 By:_________________________________
                                     General Partner

                                           
                                     DAVID C. HENDERSON
                                     BUYER:

                                     CALI REALTY ACQUISITION CORPORATION

                                 By:_________________________________
















                                 EXHIBIT 10.56



<PAGE>
                      SECOND AMENDMENT TO AGREEMENT OF SALE
                                    PARCEL II
                             AIRPORT BUSINESS CENTER
                              TINICUM TOWNSHIP, PA


         THIS  AMENDMENT is made this 17th day of December,  1996,  by and among
HENDERSON/TINICUM PARTNERSHIP, a Pennsylvania general partnership, INTERNATIONAL
COURT II LIMITED PARTNERSHIP, a Pennsylvania limited partnership,  INTERNATIONAL
COURT III JOINT VENTURE, a Pennsylvania general partnership, WILBUR C. HENDERSON
& SON, a Pennsylvania general partnership, and DAVID C. HENDERSON, an individual
(hereinafter  collectively  referred to as "Sellers"  and each  individually  as
"Seller"),  and  CALI  REALTY  ACQUISITION  CORPORATION  ("Buyer"),  a  Delaware
corporation.

                                   BACKGROUND

         A.  Sellers and Buyer have  entered  into a certain  Agreement  of Sale
dated  October 23,  1996,  as amended by an Amendment to Agreement of Sale dated
December 3, 1996 (as amended,  the "Agreement of Sale"),  pursuant to which each
Seller agreed to sell to Buyer certain property owned by it, and Buyer agreed to
purchase from each Seller such property,  all of which such property is commonly
known as the  Airport  Business  Center,  Parcel  II,  and is located in Tinicum
Township,  Delaware  County,  Pennsylvania,  and  more  fully  described  in the
Agreement of Sale.

         B. The Sellers and Buyer desire to amend the Agreement of Sale.

         C. Capitalized  terms used herein but not defined herein shall have the
meaning ascribed to such terms in the Agreement of Sale.

         NOW, THEREFORE,  for good and valuable  consideration,  the receipt and
sufficiency of which are acknowledged, and intending to be legally bound hereby,
the parties agree as follows:

         1. The Henderson  Group Lease. At Closing and as a condition to Buyer's
obligations  hereunder and under the Agreement of Sale,  International  Court II
Limited  Partnership,  shall  cause The  Henderson  Group,  Inc.  to execute and
deliver to Buyer an amendment (the "Lease  Amendment") to its existing lease for
Suite 210 in the International Court II Building (the "Lease").  At Closing, and
as a condition to Buyer's obligations hereunder and under the Agreement of Sale,
Wilbur C.  Henderson & Son and David C.  Henderson  shall execute and deliver to
Buyer a  guaranty  of  lease  agreement  pursuant  to which  each of them  shall
guaranty and become a surety for the  obligations of The Henderson  Group,  Inc.
under the Lease (the "Henderson Guaranty"). The Lease Amendment and the Guaranty
shall be in the form attached hereto as Exhibits "A" and "B", respectively.

         2.  Declaration.  The  Buildings  and the  Parcel are  encumbered  by a
Declaration of Airport Business Center Protective  Covenants and Easements dated
April 25, 1986,  amended by a First Amendment dated April 5, 1989, and clarified
by a  Clarification  of First Amendment dated October 31, 1989, all of which are
recorded  in  the  Recorder  of  Deeds  Office  in  and  for  Delaware   County,
Pennsylvania   (the  "Recorder's   Office")  (as  amended  and  clarified,   the
"Declaration").  By that  Declarant  Assignment  dated  September  1,  1987  and
recorded in the Recorder's Office at Volume 660, page 1320, all of the rights of
the  Declarant  (as  defined in the  Declaration)  where  assigned  to Wilbur C.
Henderson & Son and David C. Henderson.
<PAGE>
                  Wilbur  C.  Henderson  & Son and  David C.  Henderson  for the
purposes of this Amendment are sometimes  hereinafter  referred to  collectively
as, the  "Declarant".  At  Closing,  and as a condition  to Buyer's  obligations
hereunder and under the Agreement of Sale, Sellers shall cause Declarant to:

                  A.  Execute  and deliver to Buyer an  instrument,  in form and
substance  reasonably  acceptable to Buyer and in recordable form, providing for
the amendment of the Declaration to release and remove the rights,  benefits and
obligations  of the  Declaration  and  the  Declarant  (other  than  Article  II
thereunder)  from the Buildings and the Parcel,  including,  among other things,
the  deletion of Article III, the deletion of any right by Declarant to make any
assessments  against any Building or the Parcel, the deletion of any requirement
by the owner of any Building or the Parcel to make any payments or contributions
to  Declarant  and the removal of any right of Declarant to place a lien against
any Building or the Parcel.

                  B.  Execute  and deliver to Buyer an  instrument,  in form and
substance reasonably acceptable to Buyer and in recordable form, terminating the
easements for storm water  detention  facilities  burdening  that portion of the
Parcel  identified as Lot 4 of Parcel II of the Airport  Business  Center on the
Airport  Business Center Plan (as defined in the  Declaration),  and designating
the Airport Business Center Common Areas burdening any Building or the Parcel as
Airport Business Center Limited Common Areas (as defined in the Declaration).

                  C.  Execute  and deliver to Buyer an  instrument,  in form and
substance  reasonably  acceptable to Buyer and in recordable  form,  pursuant to
which  Declarant for themselves and their  successors and assigns shall covenant
and agree to waive any  requirements  imposed against any Building or the Parcel
or any owner thereof or and waive any rights granted to Declarant  under Article
II of the Declaration as they relate to any Building or to the Parcel.

                  D.  Execute and  deliver  such  documents  and plans as may be
reasonably requested by Buyer to further the intent of this Paragraph.

                  Following  Closing,  Declarant  agrees  to use its  reasonable
efforts  to  cause  the  Owners  of  all  Building  Sites  (as  defined  in  the
Declaration)  to execute and deliver an amendment to the  Declaration  releasing
and  removing  the  Buildings  and the Parcel from the burden and benefit of the
Declaration,  including  Article II of the Declaration.  The foregoing  sentence
shall not limit the obligations of the Declarant set forth above.

         3. Legal  Description.  Each Seller  agrees that the Deed that it shall
deliver shall, at Buyer's option, contain a legal description of the Building or
Parcel that such Seller is conveying  based upon the final survey  thereof to be
prepared by Brandywine Valley Engineers,  Inc., a copy of which will be provided
to each  Seller,  but in no event  shall any  Seller be  required  to convey any
property that it does not own.

         4. Closing. Closing shall occur on or before December 20, 1996.

         5. Deposit.  Buyer shall deliver to Title Company the Second Deposit of
$250,000 upon the full execution of this Amendment.

         6. Remedies - Parcel. In the event Buyer defaults in its performance of
its  obligations  set forth in Paragraph  26 of the  Agreement of Sale Wilbur C.
Henderson & Son and David C. Henderson shall be entitled to exercise any and all
rights and remedies that may be available at law or in equity.  The Form of Cali
Guaranty  attached to the  Agreement of Sale as Exhibit "G" shall be modified to
clarify that Cali Realty Corporation's obligations are primary.
<PAGE>
         7. No Other Changes.  Except as specifically  amended by the foregoing,
all of the terms, conditions,  covenants and agreements in the Agreement of Sale
shall remain unaltered and of full force and effect.

         8.  Miscellaneous.  This  Amendment  shall be  governed  and  construed
according to the laws of the Commonwealth of Pennsylvania.  This Amendment shall
inure to the  benefit  of, and be binding  upon,  the  parties  hereto and their
respective successors and assigns.

         9.  Counterparts.  This  Amendment  may be  executed  in  one  or  more
counterparts,  each of which  shall be deemed to be an  original as to any party
whose  signature  appears  thereon,  and all of which when taken  together shall
constitute one and the same instrument.  The parties agree to accept and rely on
facsimile  copies of signatures as originals.  The parties may rely on facsimile
copies as originals.

         10.  Survival.  The  provisions  of this  Amendment  shall  survive the
Closing and shall not merge into the Deeds.


         IN WITNESS WHEREOF,  the parties hereto,  intending to be legally bound
hereby,  have  caused this  Agreement  to be signed the day and year first above
written.


                          SIGNATURES ON FOLLOWING PAGE

<PAGE>
                                     SELLERS:

                                     HENDERSON/TINICUM PARTNERSHIP

                                 By: HENDERSON DELAWARE CORP., general
                                     partner

                                 By: _________________________________

                                     HENDERSON LESTER CORP., general partner

                                 By: _________________________________

                                     INTERNATIONAL COURT II LIMITED PARTNERSHIP

                                 By: HENDERSON INTERSTATE CORP., its sole
                                     general partner

                                 By:_________________________________


                                     INTERNATIONAL COURT III JOINT VENTURE

                                 By: HENDERSON STEVEN CORP., general partner

                                 By:_________________________________

                                          
                                     ADWIN REALTY COMPANY, general partner

                                 By:_________________________________


                                     WILBUR C. HENDERSON & SON

                                 By:_________________________________
                                           General Partner

                                 By:_________________________________
                                           General Partner


                     SIGNATURES CONTINUED ON FOLLOWING PAGE

<PAGE>



                                       
                                      --------------------- 
                                         DAVID C. HENDERSON


                                     BUYER:

                                     CALI REALTY ACQUISITION CORPORATION

                                 By:_________________________________




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