HEALTH & RETIREMENT PROPERTIES TRUST
8-K, 1998-03-31
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): March 30, 1998




                     HEALTH AND RETIREMENT PROPERTIES TRUST
             (Exact name of registrant as specified in its charter)




  Maryland                       1-9317                    04-6558834
(State or other              (Commission                (IRS Employer
jurisdiction of )             File Number)              Identification No.)
incorporation)



  400 Centre Street, Newton, MA                         02158
(Address of principal executive offices)               (Zip Code)



        Registrant's telephone number, including area code: 617-332-3990


<PAGE>

Item 2.  Acquisition or Disposition of Assets.

         On  March  30,  1998,  Health  and  Retirement   Properties  Trust  and
Subsidiaries  (the "Company")  purchased 1600 Market Street, a commercial office
property  with  approximately  825,374  square  feet  located  in  Philadelphia,
Pennsylvania  from MSA 1600  Associates,  L.P. (the "Seller") for $106.4 million
plus closing costs and other tenant  reimbursements in a negotiated  arms-length
transaction.  The property has been and will continue to be rented as commercial
office space.

         Property agent and management services, for this property are currently
provided by an unaffiliated  third party. The management  contract is cancelable
upon 30 days  written  notice.  Management  fees are  based on a  percentage  of
revenue  derived  from this  property.  The Company  plans to retain the current
property  manager under a transitional  period.  Subsequent to the  transitional
period,  the  property  will be  managed by REIT  Management  &  Research,  Inc.
("RMR"),  which provides  property agent and management  services for certain of
the Company's multi-tenant buildings and investment and administrative  services
to the Company.  RMR is owned by Messrs.  Gerard M. Martin and Barry M. Portnoy,
who are managing trustees of the Company.  Management fees paid to RMR are based
on a percentage of revenue  derived from the  multi-tenant  buildings  under its
management.

         The  consideration  for the acquisition was funded initially by drawing
under the Company's  existing  revolving line of credit with Dresdner  Kleinwort
Benson North America LLC, as agent,  and Fleet National Bank, as  administrative
agent.

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

a.   Financial Statements Under Rule 3-14 of Regulation S-X

         Audited  Statement  of Revenue  and  Certain  Expenses  for 1600 Market
         Street for the Year Ended December 31, 1997

                  Report of Independent Auditors                           F-1
                  Statement of Revenues and Certain Expenses               F-2
                  Notes to Statement of Revenues and Certain Expenses      F-3

      
                                       2
<PAGE>


         The Company,  after investigation of the property,  is not aware of any
material  factors,  other than those  enumerated  above,  which  would cause the
financial  information  reported  not to be  necessarily  indicative  of  future
operating results.

b.   Pro Forma Financial and Other Data

         Pro Forma Consolidated Balance Sheet as of December 31, 1997      F-5
         Pro Forma Consolidated Statement of Income for the Year 
            Ended December 31, 1997                                        F-6



c.   Exhibits

         2        Purchase  and  Sale  Agreement  dated  March  13,  1998 by and
                  between MSA 1600 Associates,  L.P., as seller and the Company,
                  as purchaser.

         23       Consent of Ernst & Young LLP


                                        3

<PAGE>


                         Report of Independent Auditors



To the Board of Trustees
Health and Retirement Properties Trust


We have audited the  statement of revenues and certain  expenses of the property
("1600 Market Street") to be acquired from MSA 1600  Associates,  L.P. by Health
and  Retirement  Properties  Trust,  as  described in Note 1, for the year ended
December 31, 1997. This financial statement is the responsibility of 1600 Market
Street's  management.  Our  responsibility  is to  express  an  opinion  on  the
financial statement based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards  require that we plan and perform the audit to obtain reasonable
assurance   about   whether  the   financial   statement  is  free  of  material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial  statement.  An audit also includes
assessing  the  basis of  accounting  used  and  significant  estimates  made by
management,  as well as  evaluating  the overall  presentation  of the financial
statement.  We  believe  that our  audit  provides  a  reasonable  basis for our
opinion.

The accompanying statement of revenues and certain expenses was prepared for the
purpose  of  complying  with the rules and  regulations  of the  Securities  and
Exchange  Commission  for  inclusion  in  Form  8-K  of  Health  and  Retirement
Properties  Trust and is not  intended  to be a  complete  presentation  of 1600
Market Street's revenues and expenses.

In our opinion,  the financial  statement  referred to above presents fairly, in
all material respects,  the revenues and certain expenses as described in Note 1
of 1600 Market Street for the year ended  December 31, 1997, in conformity  with
generally accepted accounting principles.

                                                  ERNST & YOUNG LLP

Boston, Massachusetts
March 26, 1998


                                       F-1

<PAGE>

                               1600 Market Street
                   Statement of Revenues and Certain Expenses

                                    (Note 1)

                      For the year ended December 31, 1997





Revenues:

   Rental                                                            $15,624,845
   Reimbursement of operating costs                                    3,200,542
   Other                                                                  57,264
                                                                     -----------
Total revenues                                                        18,882,651
                                                                     -----------
Certain Expenses:
   Property operating                                                  4,652,917
   Real estate taxes and insurance                                     2,279,398
   General and administrative                                            726,892
                                                                     -----------

Total certain expenses                                                 7,659,207
                                                                     -----------

   Revenues in excess of certain expenses                            $11,223,444
                                                                     ===========

See accompanying notes to financial statement.


                                       F-2


<PAGE>

                               1600 Market Street

               Notes to Statement of Revenues and Certain Expenses

                      For the year ended December 31, 1997


1. General Information and Summary of Significant Accounting Policies:

         MSA 1600 Associates,  L.P. (the "Partnership"),  a Pennsylvania limited
partnership, owns and operates an office building located at 1600 Market Street,
Philadelphia,  Pennsylvania  (the  "Property").  The general partner is MSA 1600
Associates A-I.

         1600 Market Street is not a legal entity but rather certain real estate
subject to a purchase  contract by Health and Retirement  Properties  Trust. The
accompanying statement of revenues and certain expenses includes the accounts of
1600 Market Street.

         The  accompanying  financial  statement has been prepared in accordance
with Rule 3-14 of Regulation S-X of the  Securities and Exchange  Commission for
inclusion in Form 8-K of Health and Retirement  Properties  Trust.  Accordingly,
certain historical expenses which may not be comparable to the expenses expected
to be incurred in the proposed future operations of 1600 Market Street have been
excluded.  Expenses excluded consist of interest,  depreciation and amortization
and other costs not  directly  related to the future  operations  of 1600 Market
Street.

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the amounts  reported in the  financial  statement  and
accompanying notes. Actual results could differ from those estimates.

         Rental  income is  recognized on a straight line basis over the term of
the related leases.

2. Leases

         MSA  1600  Main   Associates,   L.P.,  as  lessor,   has  entered  into
non-cancelable  operating  leases at 1600 Market Street.  Minimum future rentals
under the leases in effect at December 31, 1997 are summarized as follows:


Year
- ----

1998                          $  14,969,000
1999                             13,541,000
2000                             12,645,000
2001                             12,590,000
2002                             12,453,000
Thereafter                       98,367,000
                               ------------
                               $164,565,000
                               ============
                             

         The leases at 1600 Market  Street are generally for a term greater than
one year and no more than  fifteen  years and  provide  for  operating  and real
estate tax escalations and, in certain cases, increases in minimum rent.

                                       F-3
<PAGE>


                     HEALTH AND RETIREMENT PROPERTIES TRUST

              Unaudited Pro Forma Consolidated Financial Statements

         The  following  unaudited  pro forma  consolidated  balance sheet as of
December  31, 1997 and the  consolidated  statement of income for the year ended
December 31, 1997,  present the consolidated  financial position and the results
of  operations  of Health  and  Retirement  Properties  Trust  and  consolidated
subsidiaries  (the "Company") as if the  transactions  described in the notes to
unaudited  pro forma  consolidated  financial  statements  were  consummated  on
January  1,  1997.  Additional  information  with  respect  to  certain  of such
transactions  is provided in the  Company's  Annual  Report on Form 10-K for its
fiscal year ended  December 31, 1997.  These  unaudited  pro forma  consolidated
financial  statements  should be read in connection  with,  and are qualified in
their entirety by reference to, the separate  consolidated  financial statements
of the Company for the year ended  December 31, 1997,  included in the Company's
Current  Report on Form 8-K dated February 27, 1998.  These  unaudited pro forma
consolidated   financial  statements  are  not  necessarily  indicative  of  the
financial position and the expected results of operations of the Company for any
future period. Differences could result from, among other considerations, future
changes in the Company's  portfolio of  investments,  changes in interest rates,
changes in the capital  structure of the Company,  delays in the  acquisition of
certain properties and changes in property level operating expenses.


                                       F-4


<PAGE>

<TABLE>
<CAPTION>
 Health and Retirement Properties Trust
 Pro Forma Consolidated Balance Sheet
 December 31, 1997
 (dollars in thousands)
 (unaudited)

                                                                                              Recent
                                              Historical     1600 Market Street (A)      Acquisitions (B)         Pro Forma
                                             -----------     ----------------------      ----------------       ------------
<S>                                         <C>                 <C>                     <C>                     <C>

 ASSETS

Real estate properties, at cost              $ 1,969,023         $   115,604              $   152,651            $ 2,237,278 
Less accumulated depreciation                    111,669                --                       --                  111,669
                                             -----------         -----------              -----------            -----------
                                               1,857,354             115,604                  152,651              2,125,609
                                                                                                                
Real estate mortgages, net                       104,288                --                       --                  104,288
Investment in Hospitality Properties Trust       111,134                --                       --                  111,134
Other assets                                      63,187                (604)                 (52,651)                 9,932 
                                             -----------         -----------              -----------            -----------
                                             $ 2,135,963         $   115,000              $   100,000            $ 2,350,963
                                             ===========         ===========              ===========            ===========
                                                                                                                
                                                                                                                
LIABILITIES AND SHAREHOLDERS' EQUITY                                                                            
Bank notes payable                           $   200,000         $   115,000              $   100,000            $   415,000
Senior notes payable, net                        349,900                --                       --                  349,900
Mortgage notes payable                            26,329                --                       --                   26,329
Convertible subordinated debentures              211,650                --                       --                  211,650
Other liabilities                                 81,824                --                       --                   81,824
Shareholders' equity                           1,266,260                --                       --                1,266,260
                                             -----------         -----------              -----------            -----------
                                             $ 2,135,963         $   115,000              $   100,000            $ 2,350,963
                                             ===========         ===========              ===========            ===========


                          See accompanying notes to unaudited pro forma condolidated financial statements

</TABLE>

                                      F-5
<PAGE>
<TABLE>
<CAPTION>
Health and Retirement Properties Trust
Pro Forma Consolidated Statement of  Income
Year Ended December 31, 1997
(amounts in thousands, except per share data)
(unaudited)
                                                                                       Second Quarter   Third Quarter     West 34th 
                                                     Historical   GPI (C)    CSMC (D)  Acquisitions (E) Acquisitions (E)  Street (F)
                                                     ----------  --------   --------  ----------------  ---------------- -----------
<S>                                                  <C>        <C>         <C>           <C>               <C>          <C>
Revenues:
    Rental income                                     $188,000   $ 11,959    $  6,831      $  2,948          $ 3,179       $ 10,771 
    Interest and other income                           20,863       (366)       --            --                --            --   
                                                      --------   --------    --------      --------          --------      -------- 
      Total revenues                                   208,863     11,593       6,831         2,948             3,179        10,771 
                                                      --------   --------    --------      --------          --------      --------
Expenses:                                                                                                                           
    Operating expenses                                  26,765      2,053       1,910          --                 954         3,641 
    Interest                                            36,766     (1,216)      3,232         1,087             1,463         2,876 
    Depreciation and amortization                       39,330      4,156       1,119           627               501         1,869 
    General and administrative                          11,670      2,105         249           139               111           415 
                                                      --------   --------    --------      --------          --------      -------- 
      Total expenses                                   114,531      7,098       6,510         1,853             3,029         8,801 
                                                      --------   --------    --------      --------          --------      -------- 
Income (loss) before equity in earnings of                                                                                          
    Hospitality Properties Trust and                                                                                                
    extraordinary item                                  94,332      4,495         321         1,095               150         1,970 
Equity in earnings of Hospitality Properties 
    Trust                                                8,590                                                                      
Gain on equity transaction of Hospitality 
    Properties Trust                                     9,282       --                        --                --                 
                                                      --------   --------    --------      --------          --------      -------- 
                                                                                                                                    
Net income (loss) before extraordinary item           $112,204   $  4,495    $    321      $  1,095          $    150      $  1,970 
                                                      --------   --------    --------      --------          --------      -------- 
                                                                                                                                    
Weighted average shares outstanding                     92,168                                                                      
                                                                                                                                    
Basic and diluted earnings per common share:                                                                                        
Net income before extraordinary item                  $   1.22                                                                      
<CAPTION>
                                                      Franklin   Bridgepoint  Fourth Quarter     Recent       1600 Market
                                                      Plaza (G)   Square (H) Acquisitions(E) Acquisitions(I)   Street (J)  Pro Forma
                                                      ---------  ----------- --------------- ---------------  -----------  ---------
<S>                                                  <C>        <C>            <C>              <C>             <C>        <C>
Revenues:                                                                                                                           
    Rental income                                     $  9,614   $  5,599       $  8,461         $ 18,624        $ 18,883   $284,869
    Interest and other income                             --         --             --                                        20,497
                                                      --------   --------       --------         --------        --------   --------
      Total revenues                                     9,614      5,599          8,461           18,624          18,883    305,366
                                                      --------   --------       --------         --------        --------   --------
Expenses:                                                                                                                           
    Operating expenses                                   4,904      2,162          2,634            3,359           7,659     56,041
    Interest                                             2,486      3,216          4,338            6,500           7,475     68,223
    Depreciation and amortization                        1,334      1,175          1,269            3,435           2,601     57,416
    General and administrative                             296        262            283              764             578     16,872
                                                      --------   --------       --------         --------        --------   --------
      Total expenses                                     9,020      6,815          8,524           14,058          18,313    198,552
                                                      --------   --------       --------         --------        --------   --------
Income (loss) before equity in earnings of                                                                                          
    Hospitality Properties Trust and                                                                                                
    extraordinary item                                     594     (1,216)           (63)           4,566             570    106,814
Equity in earnings of Hospitality Properties                                                                                        
    Trust                                                                                            --              --        8,590
Gain on equity transaction of Hospitality                                                                                           
    Properties Trust                                                                 --              --              --        9,282
                                                      --------   --------       --------         --------        --------   --------
                                                                                                                                    
Net income (loss) before extraordinary item           $    594   $ (1,216)      $    (63)        $  4,566        $    570   $124,686
                                                      --------   --------       --------         --------        --------   --------
                                                                                                                                    
Weighted average shares outstanding                                                                                           98,838
                                                                                                                                    
Basic and diluted earnings per common share:                                                                                        
Net income before extraordinary item                                                                                        $   1.26
                                                      
                          See accompanying notes to unaudited pro forma consolidated financial statements
</TABLE>
                                      F-6
<PAGE>

         Notes To Unaudited Pro Forma Consolidated Financial Statements

Pro Forma Consolidated Balance Sheet Adjustments at December 31, 1997.

A.Represents the Company's  acquisition on March 30, 1998 of a commercial office
property  located at 1600 Market  Street in  Philadelphia,  Pennsylvania  ("1600
Market  Street").  This  acquisition  was funded by drawing  under the Company's
existing revolving line of credit.

B.Represents the Company's  acquisitions  during January 1998, February 1998 and
March  1998  of two  medical  office  properties  and  three  commercial  office
properties located in Pennsylvania, four commercial office properties located in
Texas, a medical office property located in  Massachusetts,  a commercial office
property  located in Maryland,  one medical  office  property and two commercial
office properties located in Minnesota and three medical office properties and a
commercial   office   property   located  in  Florida   (collectively,   "Recent
Acquisitions").  The Recent  Acquisitions were funded with available cash and by
drawings under the Company's existing revolving line of credit.

Pro Forma  Consolidated  Statement  of  Income  Adjustments  for the Year  Ended
December 31, 1997.

C.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of the government office properties ("Government Office Properties")
from Government Property Investors,  Inc ("GPI").  Also reflects the decrease in
interest  expense  arising from the  Company's  issuance of its common shares of
beneficial interest in a March 1997 offering, the proceeds of which were used in
part to repay amounts then  outstanding  under the Company's  revolving  line of
credit,  net of an  increase  in  interest  expense  related  to  the  Company's
assumption of certain debt in connection  with the acquisition of the Government
Office Properties.

D.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of two medical office properties and two parking  structures located
in Los Angeles, California ("CSMC"), as well as the increase in interest expense
due  to  the  use of the  Company's  revolving  line  of  credit  to  fund  this
acquisition.

E.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of a) a 200 unit  retirement  housing  property  located in Spokane,
Washington  and 20 medical office  clinics and ancillary  structures  located in
Massachusetts  during the second quarter  ("Second  Quarter  Acquisitions"),  b)
three medical and two commercial office buildings located in Pennsylvania during
the  third  quarter  ("Third  Quarter  Acquisitions")  and c) a  medical  office
property located in Colorado,  a medical office property located in Maryland,  a
medical office property located in Rhode Island, three medical office properties
located in California, and a medical office property located in Washington, D.C.
during  the  fourth  quarter  ("Fourth  Quarter  Acquisitions"),  as well as the
increase in interest  expense due to the use of the Company's  revolving line of
credit to fund these acquisitions.

F.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of West 34th Street in New York City ("West 34th  Street"),  as well
as the increase in interest  expense due to the use of the  Company's  revolving
line of credit to fund the acquisition.


                                       F-7

<PAGE>


G.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of Franklin Plaza in Philadelphia,  Pennsylvania ("Franklin Plaza"),
as well as the  increase  in interest  expense  due to the use of the  Company's
revolving line of credit to fund the acquisition.

H.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition  of  Bridgepoint  Square,  Austin,  Texas  ("Bridgepoint   Square").
Bridgepoint Square consists of five properties,  of which one property was under
construction  at September 30, 1997 and one property was completed in July 1997.
Also represents the increase in interest expense due to the use of the Company's
revolving line of credit to fund the acquisition.

I.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
Recent Acquisitions,  as well as the increase in interest expense due to the use
of the Company's revolving line of credit to fund these acquisitions.

J.Represents the increase in rental income, operating expenses, depreciation and
amortization and general and administrative  expenses arising from the Company's
acquisition of 1600 Market Street,  as well as the increase in interest  expense
due  to  the  use  of the  Company's  revolving  line  of  credit  to  fund  the
acquisition.

                                      F-8



<PAGE>




                                   SIGNATURES

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


                                  HEALTH AND RETIREMENT PROPERTIES TRUST



                                  By:  /s/ Ajay Saini
                                       Ajay Saini, Treasurer and 
                                        Chief Financial Officer

Date:    March 31, 1998




                               1600 MARKET STREET
                           PHILADELPHIA, PENNSYLVANIA



                           PURCHASE AND SALE AGREEMENT

                                     BETWEEN

                           MSA 1600 ASSOCIATES, L.P.,
                       a Pennsylvania limited partnership


                                     SELLER


                                       AND

                     HEALTH AND RETIREMENT PROPERTIES TRUST

                     a Maryland Real Estate Investment Trust

                                  ("PURCHASER")


                              As of March 13, 1998



<PAGE>
                           PURCHASE AND SALE AGREEMENT


         THIS PURCHASE AND SALE AGREEMENT  ("Agreement")  is made as of the 13th
day of March,  1998 (the "Effective  Date"), by and between MSA 1600 ASSOCIATES,
L.P., a Pennsylvania limited partnership,  c/o ERE Yarmouth, 787 Seventh Avenue,
46th Floor,  New York,  New York 10019 (the  "Seller") and HEALTH AND RETIREMENT
PROPERTIES  TRUST, a Maryland real estate  investment trust  ("Purchaser"),  400
Centre Street, Newton, MA 02158.


                              W I T N E S S E T H:

         In  consideration  of covenants,  promises and  undertakings  set forth
herein,  intending to be legally bound, and for good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged,  each of Seller and
Purchaser agrees as follows:


                                    ARTICLE I

                                PURCHASE AND SALE

         1.1 Agreement of Purchase and Sale. Subject to the terms and conditions
hereinafter  set  forth,  Seller  agrees  to sell and  convey  the  Property  to
Purchaser,  and Purchaser agrees to purchase the Property from Seller.  The term
"Property" shall mean, collectively, the following:

              (a)  Certain  land  ("Land")  located  at 1600  Market  Street  in
Philadelphia,  Pennsylvania,  more  specifically  described  in  Exhibit  1.1(a)
attached hereto;

              (b) The buildings and  improvements,  and now situated on the Land
(the "Improvements");

              (c) All furniture,  personal property,  machinery,  apparatus, and
equipment  owned by  Seller  currently  and used in the  operation,  repair  and
maintenance of the Land and Improvements  and situated  thereon  (collectively,"
the "Personal Property"),  to the extent listed on the inventory attached hereto
as Exhibit 1.1(c). The Personal Property is subject to depletions,  replacements
and additions in the ordinary course of Seller's business;

              (d) All easements and appurtenances belonging to or inuring to the
benefit of Seller and pertaining to the Land, if any;

              (e) The leases  which are  identified  on the  Schedule  of Leases
attached hereto as Exhibit  1.1(e),  and any new leases entered into pursuant to
Section  5.4,  which as of the Closing  affect all or any portion of the Land or
Improvements ("Leases");

<PAGE>



              (f) All contracts and agreements  ("Operating  Agreements")  which
are  listed on  Exhibit  1.1(f) or which  Purchaser  is deemed to have  approved
pursuant to this Agreement relating to the operation or maintenance of the Land,
Improvements or Personal Property,  the terms of which extend beyond midnight of
the day preceding the date of the Closing;

              (g) Seller's rights, if any, to the name "1600 Market Street";

              (h)  Assignable  warranties  and  guaranties  issued  to Seller in
connection with the Improvements or Personal Property; and

              (i)  All  transferable  consents   authorizations,   variances  or
waivers,   licenses,   permits   and   approvals   from  any   governmental   or
quasi-governmental agency, department, board, commission, bureau or other entity
or instrumentality solely in respect of the Land or Improvements.

         1.2 Price and Payment.

              1.2.1  Purchase  Price.   The  purchase  price  for  the  Property
("Purchase  Price") is One Hundred  Six Million  Three  Hundred  Fifty  Thousand
Dollars ($106,350,000) U.S.

              1.2.2  Payment.  The Purchase  Price shall be paid by Purchaser to
Seller as follows:

                   1.2.2.1  Prior  to  the   execution  of  this   Agreement  by
Purchaser,  Purchaser has delivered to First  American Title  Insurance  Company
(the "Title Company") Two Million Dollars ($2,000,000) (the "First Deposit"). If
Purchaser  does not  terminate  this  Agreement on or before the  Approval  Date
(hereafter  defined),  then Purchaser  shall deliver to the Title Company on the
day  after  the  Approval  Date  the  additional  sum  of  Two  Million  Dollars
($2,000,000) (the "Second  Deposit").  The First Deposit and the Second Deposit,
together with all interest earned thereon,  are herein  collectively  called the
"Deposit".  The  Deposit  shall  be held  in  escrow  by the  Title  Company  in
accordance with the terms hereof.  If Purchaser  terminates this Agreement on or
prior to the Approval Date, the Title Company shall promptly  return the Deposit
and all accrued  interest to  Purchaser.  If Closing  occurs,  the Title Company
shall pay the  Deposit  and all  accrued  interest  to Seller on  account of the
Purchase Price.

                   1.2.2.2  At the  Closing,  Purchaser  shall pay to Seller the
Purchase  Price (plus or less such amount as shall be the net amount due Seller,
or credited to Purchaser,  at Closing as a result of the provisions  hereinafter
in this Agreement, but net of the Deposit and accrued interest) by wire transfer
of immediately  available funds to one or more bank accounts to be designated by
Seller.

         1.3 Closing.  Payment of the Purchase  Price and the closing  hereunder
(the  "Closing")  will take place on Monday,  March 30,  1998 at the  offices of
Wolf, Block, Schorr and

                                       -2-
<PAGE>

Solis-Cohen  LLP  commencing at 10:00 a.m. local time, or at such other time and
place as may be agreed upon in writing by Seller and Purchaser.


                                   ARTICLE II

                                TITLE AND SURVEY

         2.1 Title and Survey.  Upon signing this Agreement,  Purchaser,  at its
sole cost and expense,  shall order a Commitment for title insurance on the Land
to be issued by the Title Company,  a copy of which shall be attached  hereto as
Exhibit 2.1 ("Title  Commitment").  Purchaser may, at its sole cost and expense,
obtain a survey of the Land  ("Survey").  Purchaser  shall  have  until the date
occurring  ("Interim  Date") ten (10) days after receipt of the Title Commitment
or Survey, as the case may be, (but not later than the Approval Date) to provide
written notice to Seller of any matters shown by the Title  Commitment or Survey
which are not  satisfactory  to Purchaser,  which notice ("Title  Notice") shall
specify the reason such  matter(s) are not  satisfactory  and the curative steps
necessary to remove the basis for Purchaser's disapproval.  Seller and Purchaser
shall then have until the Approval Date to make such  arrangements  or take such
steps  as  they  shall  mutually  agree  to  satisfy  Purchaser's  objection(s);
provided,  however, that Seller shall have no obligation whatsoever to expend or
agree to expend any funds,  to undertake or agree to undertake any  obligations,
or otherwise to cure or agree to cure any title or survey objections, and Seller
shall not be deemed  to have any  obligation  to cure  unless  Seller  expressly
undertakes such an obligation by a written notice to, or written agreement with,
Purchaser  given or  entered  into on or prior to the  Approval  Date and  which
recites that it is in response to a Title  Notice.  Purchaser's  sole right with
respect to any Title  Commitment or Survey matter to which it objects in a Title
Notice given in a timely manner shall be to elect on or before the Approval Date
to terminate this Agreement  pursuant to Section 2.4, hereof.  All matters shown
on the Title  Commitment  and/or Survey with respect to which Purchaser fails to
give a Title Notice on or before the last date for so doing,  or with respect to
which a timely  Title  Notice is given but Seller  fails to undertake an express
obligation  to cure as  provided  above,  shall  be  deemed  to be  approved  by
Purchaser  and  "'Permitted  Encumbrances"  as  provided  in Section 2.3 hereof,
subject,  however,  to  Purchaser's  termination  right  provided in Section 2.4
hereof.

         2.2 Notwithstanding any provision set forth above in Section 2.2 to the
contrary, Seller agrees, at or prior to the Closing:

                   (i) to furnish pay-off statements, valid through the business
day following Closing,  from all holders of mortgages of record, (such mortgages
are  herein  called  the  "Seller  Mortgage(s)")  and to pay in full all  Seller
Mortgage(s);

                   (ii) to deliver to the Title  Company  an  original  executed
copy of the Affidavit (as hereinafter defined);

                                       -3-

<PAGE>

                   (iii)  subject  to the  proration  provisions  set  forth  in
Section 4.4, to cause to be removed from the Title  Commitment the exception for
1998 and prior year real estate taxes,  provided that the same are currently due
and payable;

                   (iv) subject to the proration provisions set forth in Section
4.4, to cause to be removed from the Title  Commitment  the  exception for water
and sewer rent to the date of Closing,  provided that the same are currently due
and payable;

                   (v) subject to the proration  provisions set forth in Section
4.4, to cause to be removed from the Title  Commitment  the  exception  for fire
service charges, provided that the same are currently due and payable;

                   (vi) to cause to be  removed  from the Title  Commitment  the
requirement  for proof with regard to the  identity  of the general  partners in
Seller; and

                   (vii) to  deliver  to the Title  Company  an  affidavit  that
Seller has not filed an Election under Chapter 7 of Title 39 of the Pennsylvania
Consolidated Statutes, provided that Seller has not filed such Election.

         2.3 Permitted  Encumbrances.  Unless Purchaser  timely  terminates this
Agreement  pursuant  to Section 2.4  hereof,  Purchaser  shall be deemed to have
approved the Property subject to the following  (referred to herein collectively
as "Permitted Encumbrances"):

              2.3.1 All  exceptions  to title shown in the Title  Commitment  or
matters  shown on the Survey which  Purchaser  has approved or is deemed to have
approved pursuant to Section 2.2 hereof;

              2.3.2 All  contracts  and Leases in  connection  with the Property
which  Purchaser  has  approved or is deemed to have  approved  pursuant to this
Agreement, including the contracts listed on Exhibit 1.1(f);

              2.3.3  The  lien  of  non-delinquent  real  property,   taxes  and
assessments (including the Special Services District Assessment);

              2.3.4  Rights of parties in  possession  pursuant  to the  Leases,
whether or not shown by the public records;

              2.3.5  Subject  to  Purchaser's  right to obtain a Survey and send
Seller a Title Notice under  Section 2.2,  discrepancies,  conflicts in boundary
lines,  shortages  in area,  encroachments,  and any  state  of  facts  which an
inspection of the Property  would  disclose,  whether or not shown by the public
records;
                                       -4-

<PAGE>

              2.3.6  Subject  to  Purchaser's  right to obtain a Survey and send
Seller a Title  Notice  under  Section  2.2,  easements  or claims of  easements
whether or not shown by the public records;

              2.3.7 Subject to the proration  provisions of this Agreement,  any
service, installation,  connection, maintenance or construction charges pursuant
to the Operating  Agreement s which  Purchaser is required to assume pursuant to
this Agreement, and any charges for sewer and water; and

              2.3.8  Leaseholds  pursuant to the  Leases,  rights of vendors and
holders of security  interests on personal property  installed upon the Property
by  tenants,  and  rights of  tenants  pursuant  to the  Leases to remove  trade
fixtures at the expiration of the term of the Leases. .

         2.4  Purchaser's  Right to  Terminate.  If, as a result of its  various
investigations,  Purchaser  determines  that  purchasing  the  Property is not a
suitable investment for its purposes,  Purchaser shall have the right, by giving
to Seller written notice  ("Termination  Notice") on or before Friday, March 27,
1998 ("Approval Date"), to terminate this Agreement. In the event this Agreement
is timely  terminated by Purchaser on or prior to the Approval  Date, the Escrow
Agent shall promptly return the Deposit and accrued  interest to Purchaser,  and
neither party shall have any further rights or obligations under this agreement,
except  for the  obligations  which are  stated in  Section  10.21 to  survive a
termination of this Agreement. If for any reason whatsoever the Seller shall not
have received the Termination Notice on or prior to the Approval Date, Purchaser
shall be deemed to have  irrevocably  waived  the right of  termination  granted
under Section 2.4, and such right of termination shall be of no further force or
effect,  and Purchaser  shall be bound to proceed to Closing and  consummate the
transaction contemplated hereby pursuant to the terms of this Agreement.

         2.5  Pre-Closing  "Gap" Title Defects.  Whether or not Purchaser  shall
have furnished to Seller a Title Notice,  Purchaser may, at or prior to Closing,
notify Seller in writing of any  objections  to title first arising  between (a)
the date  which is the  later of (i) the  effective  date of  Purchaser's  Title
Commitment  referred to above or (ii) the  Effective  Date,  and (b) the Closing
Date.  With respect to any objections to title set forth in such notice,  Seller
shall have the same option to cure and  Purchaser  shall have the same option to
accept title  subject to such matters or to  terminate  this  Agreement as those
which apply to any Title Notice given by Purchaser  before the Interim  Date. If
Seller elects to attempt to cure any such matters, the date for Closing shall be
automatically  extended by a reasonable  additional  time to effect such a cure,
but in no event shall the  extension  exceed  sixty (60) days after the date for
Closing set forth in Section 1.3.3 hereof.

                                       -5-
<PAGE>

                                   ARTICLE III

                                   INSPECTIONS

         3.1 Right of  Inspection.  Prior to Closing,  Purchaser  shall have the
right to make a physical inspection of the Property.

              3.1.1  Purchaser  shall have the right to examine at such place or
places at the Property,  in the offices of the property  manager or elsewhere as
the same may be  located,  any  operating  files  maintained  by  Seller  or its
property manager in connection with the leasing,  maintenance  and/or management
of the  Property,  including,  without  limitation,  the  Leases,  lease  files,
operating agreements,  insurance policies,  bills, invoices,  receipts and other
general   records   relating  to  the  income  and  expenses  of  the  Property,
correspondence,  surveys, plans and specifications,  warranties for services and
materials provided to the Property,  engineering  reports,  environmental audits
and similar materials.

              3.1.2 Purchaser shall not have the right to examine  materials not
directly related to the leasing,  maintenance and/or management of the Property,
such as Seller's internal memoranda, financial projections, budgets, appraisals,
accounting and tax records and similar proprietary or confidential information.

              3.1.3   Purchaser   understands   and  agrees   that  any  on-site
inspections of the Property shall be conducted  upon at least  twenty-four  (24)
hours'  prior  written  notice to Seller  and in the  presence  of Seller or its
representative.

              3.1.4  Purchaser  agrees  to  indemnify  against  and hold  Seller
harmless from any claim for liabilities,  costs,  expenses (including reasonable
attorneys'  fees  actually  incurred),  damages or  injuries  arising  out of or
resulting from the inspection of the Property by Purchaser or its agents.

              3.1.5 All inspections  shall occur at reasonable times agreed upon
by  Seller  and  Purchaser  and  shall  be  conducted  so as  not  to  interfere
unreasonably with use of the Property by Seller or its tenants.


                                   ARTICLE IV

                             OBLIGATIONS AT CLOSING

         4.1 Seller's Deliveries at Closing. Seller shall deliver at the Closing
the following:

                                       -6-

<PAGE>

              (a) a duly executed special  warranty deed (the "Deed")  conveying
the Land and Improvements,  subject to the Permitted Exceptions; the warranty of
title in the Deed will be only as to claims made by, through or under Seller and
not otherwise;

              (b) a duly executed bill of sale conveying the Personal  Property,
without warranty of title or use and without warranty,  expressed or implied, as
to  merchantability  and  fitness for any  purpose  (it being  acknowledged  and
agreed,  however,  that no agreement has been made between  Seller and Purchaser
with  respect  to an  allocation  of any  portion of the  Purchase  Price to the
Personal Property);

              (c) a duly executed  Assignment and Assumption  Agreement  ("Lease
Assignment  Agreement") wherein Seller shall assign to Purchaser,  and Purchaser
shall assume, the landlord/lessor  interest in and to the Leases and pursuant to
which Purchaser shall indemnify Seller and hold Seller harmless from and against
any and all claims  pertaining to the Leases arising from and after the Closing,
including  without  limitation,  claims made by tenants with respect to tenants'
security deposits to the extent paid, credited or assigned to Purchaser;

              (d)  a  duly  executed   Assignment   and   Assumption   Agreement
("Operating  Agreement  Assignment  Agreement")  wherein  Seller shall assign to
Purchaser,  and  Purchaser  shall  assume,  Seller's  interest in the  Operating
Agreements,  to the extent assignable,  and Purchaser shall indemnify Seller and
hold  Seller  harmless  from and against  any and all claims  pertaining  to the
Operating Agreements arising from and after the Closing;

              (e) the Leases which are still in effect as of Closing and any new
leases  entered into pursuant to this  Agreement;  and a current  listing of any
tenant  security  deposits and prepaid  rents held by Seller with respect to the
Property;

              (f) copies of all Operating Agreements relating to the Property;

              (g) a Certification  Statement from the Department of Licenses and
Inspections  of the  City  of  Philadelphia  regarding  outstanding  notices  of
violations and the legality or illegality of the existing use;

              (h) copies of all  transferable  warranties and guarantees then in
effect,  if any, with respect to the  Improvements or any repairs or renovations
to the Improvements and Personal Property;

              (i) copies of books and  records at or  relating  to the  Property
held by or for the account of Seller,  including without  limitation,  plans and
specifications and lease applications, to the extent available;

              (j) a Seller's Title Company Affidavit in the form attached hereto
as Exhibit 4.1(j) (the "Affidavit");

                                       -7-
<PAGE>

              (k) a certificate of Seller to the effect that the representations
and  warranties  of Seller set forth in Section  5.1 are true and correct in all
material respects as of Closing,  or setting forth any material respect in which
any thereof is not true and correct;

              (l)  partnership and corporate  authorizations  for Seller in form
and substance reasonably satisfactory to Purchaser;

              (m) an  incumbency  affidavit  for  Seller  in form and  substance
reasonably satisfactory to Purchaser;

              (n) tenant notice  letters in the form attached  hereto as Exhibit
4.1(n);

              (o) A FIRPTA  affidavit  in the form  attached  hereto as  Exhibit
4.1(o); and

              (p) Such other  documents,  instruments  or other papers or things
necessary to carry out the obligations of Seller hereunder, provided such do not
impose any liability or obligation  upon Seller in excess of the liabilities and
obligations they have agreed to bear pursuant to this Agreement.

         4.2 Purchaser's  Deliveries at Closing.  Purchaser shall deliver at the
Closing the following:

              (a) the Purchase  Price (by causing the Title  Company to disburse
to Seller the  Deposit,  and by  Purchaser  paying the  balance of the  Purchase
Price);

              (b) authorizations for Purchaser in form and substance  reasonably
satisfactory to Seller;

              (c)  incumbency  affidavits  for  Purchaser in form and  substance
reasonably satisfactory to Seller;

              (d) a letter duly executed by Purchaser, confirming that Purchaser
is not  acquiring  the Property  with the assets of an employee  benefit plan as
defined in Section 3(3) of the Employee  Retirement  Income Security Act of 1974
("ERISA");  and, in the event  Purchaser  is unable or  unwilling to make such a
representation, Purchaser shall be deemed to be in default hereunder, and Seller
shall have the right to terminate  this  Agreement and to receive and retain the
Deposit;

              (e)  a   Certificate   of   Purchaser   to  the  effect  that  the
representations  and  warranties  of Purchaser set forth in Section 5.5 are true
and  correct in all  material  respects  as of  Closing,  or  setting  forth any
material respect in which any thereof is not true and correct;

              (f) a duly executed Lease Assignment Agreement;

                                       -8-

<PAGE>



              (g) a duly executed Operating Agreement Assignment Agreement; and

              (h) such other  documents,  instruments  or other papers or things
necessary to carry out the obligations of Purchaser hereunder,  provided such do
not  impose  any  liability  or  obligation  upon  Purchaser  in  excess  of the
liabilities  and  obligations  Purchaser  has  agreed to bear  pursuant  to this
Agreement.

         4.3 Purchaser's  Cooperation.  Purchaser  shall,  at Seller's  expense,
cooperate  with Seller for a period of seven (7) years after  Closing in case of
Seller's  need in response  to any legal  requirement,  a tax audit,  tax return
preparation  or litigation  threatened or brought  against  Seller,  by allowing
Seller and its agents or representatives  access, upon reasonable advance notice
(which notice shall identify the nature of the information sought by Seller), at
all  reasonable  times,  to examine and make copies of any and all  instruments,
files and records  which  relate to the  Property  during the period of Seller's
ownership thereof; and during said seven-year period, Purchaser shall retain and
not dispose of said instruments, files and records..

         4.4 Credits and Prorations.

              4.4.1  The  following  shall be  apportioned  between  Seller  and
Purchaser  with respect to the Property as of 12:01 a.m., on the day of Closing,
as if  Purchaser  were vested with title to the  Property  during the entire day
upon which Closing occurs:

              (a) Rents, if any, as and when collected (the term "rents" as used
in this  Agreement  includes all  payments due and payable by tenants  under the
Leases);

              (b) real  estate  taxes and  assessments  (including  the  Special
Services District Assessments) levied against the Property;

              (c) payments under the Operating Agreements;

              (d) vault charges;

              (e) water and sewer charges;

              (f) gas,  electricity,  steam and other utility  charges for which
Seller is liable, if any, such charges to be apportioned at Closing on the basis
of the most recent meter reading occurring prior to Closing; and

              (g) any other operating  expenses or other items pertaining to the
Property which are customarily  prorated between a purchaser and a seller in the
area in which the Property is located.

                                       -9-

<PAGE>

         4.5  Additional   Financial   Obligations.   Notwithstanding   anything
contained in the foregoing provisions:

              (a) At  Closing,  (A) Seller  shall,  at Seller's  option,  either
deliver to Purchaser any security  deposits  actually held by Seller pursuant to
the Leases or credit to the  account of  Purchaser  the amount of such  security
deposits  (to  the  extent  such  security  deposits  are  not  applied  against
delinquent  rents or  otherwise as provided in the  Leases),  and (B)  Purchaser
shall  credit to the  account of Seller all  refundable  cash or other  deposits
posted with utility companies serving the Property or governmental agencies, or,
at  Seller's  option,  Seller  shall be  entitled  to receive  and  retain  such
refundable cash and deposits.

              (b)  Any  real  estate   taxes  and  Special   Services   District
Assessments paid at or prior to Closing shall be prorated based upon the amounts
actually  paid. If such taxes and  assessments  for the current  period have not
been paid before Closing,  Seller shall be charged at Closing an amount equal to
that portion of such taxes and  assessments  which  relates to the period before
Closing  and  Purchaser  shall  pay the  taxes  and  assessments  prior to their
becoming  delinquent.  Any such apportionment made with respect to a tax year or
assessment  period for which the tax rate or assessment,  or both,  have not yet
been fixed shall be based upon the tax rate and/or assessment last fixed. To the
extent that the actual taxes and  assessments for the current year or assessment
period differ from the amount apportioned at Closing, the parties shall make all
necessary  adjustments  by appropriate  payments  between  themselves  following
Closing.

              (c) Charges referred to above which are payable by any tenant to a
third party shall not be apportioned  hereunder and Purchaser  shall look solely
to the tenant responsible therefor for the payment of the same.

              (d) Seller shall receive the entire advantage of any discounts for
the prepayment by Seller of any taxes,  water rates or sewer rents  attributable
to the period of Seller's ownership of the Property.

              (e) The  Personal  Property  is  included  in this  sale,  without
further  charge,  except that: (A) Purchaser shall have the option (by notice to
Seller on or prior to the Approval Date) either to (I) purchase from Seller,  at
Seller's  cost,  and pay to Seller at  Closing,  for any  supplies  which are in
unopened  containers on the Property at the time of Closing,  the amount of such
supplies and the cost thereof to be  determined as of the day before the date of
Closing  by a  certificate  of an agent or  employee  of Seller or (II)  require
Seller to remove such supplies  within 30 days after Closing;  and (B) Purchaser
shall have the option  (by  notice to Seller on or prior to the  Approval  Date)
either to (I) purchase from Seller,  at its fair market value, and pay to Seller
at Closing for the R-11  refrigerant for the chillers in the  Improvements,  the
fair market value of such R-11 Refrigerant to be reasonably determined by Seller
as of the day  before  the  date of  Closing  by a  certificate  of an  agent or
employee of Seller or (II) require  Seller to remove the R-11  Refrigerant  from
the  Improvements  within thirty (30) days after Closing.  If,  pursuant to this
subsection,  Purchaser  shall have  required  Seller to remove such  supplies or
refrigerant,  Seller shall be deemed to have  abandoned  that property if Seller
does not effect such removal within such thirty (30) day period.

                                      -10-

<PAGE>

              (f) (i)  Purchaser  shall be  responsible  for payment of: (A) all
Tenant  Inducement  Costs (as hereinafter  defined) which become due and payable
(whether before or after Closing): (1) as a result of any renewals or expansions
of existing  Leases  from and after the  Effective  Date  pursuant to renewal or
expansion rights set forth in such existing Leases and (2) under any new Leases,
approved or deemed approved in accordance with Section 5.4 hereof,  entered into
between  the  Effective  Date  and the  date  of  Closing;  and  (B) all  Tenant
Inducement  Costs  which  become  due and  payable  from and  after  the date of
Closing.

                   (ii) Seller shall be responsible  for the payment to PNC, any
real estate brokers or other entitled  third parties,  of all Tenant  Inducement
Costs (whether before or after Closing) resulting from the exercise by PNC Bank,
NA of its expansion option for floors 6 through 10.

                   (iii) If, as of the date of Closing,  Seller  shall have paid
any  Tenant  Inducement  Costs or leasing  commissions  for which  Purchaser  is
responsible  pursuant to the foregoing  provisions,  Purchaser  shall  reimburse
Seller therefor at Closing.

                   (iv) In  addition,  Purchaser  shall pay to Seller the sum of
Four Million Six Hundred  Thirty-Four  Thousand Nine Hundred  Ninety-One Dollars
($4,634,991) at Closing,  being an amount  representing  Tenant Inducement Costs
anticipated to have been incurred prior to the Effective Date.

                   (v) For purposes hereof,  the term "Tenant  Inducement Costs"
shall mean: (A) any out-of-pocket  payments required under a Lease to be paid by
the  landlord  thereunder  to or  for  the  benefit  of the  tenant  thereunder,
including,  without limit thereto,  tenant improvement costs, tenant allowances,
lease buy out costs,  and  moving,  design,  refurbishment  and club  membership
allowances and (B) any leasing commissions relating to any lease.

              (g) Unpaid and  delinquent  rent collected by Seller and Purchaser
after the date of Closing shall be delivered as follows:  (a) if Seller collects
any unpaid or delinquent  rent for the Property,  Seller shall,  within  fifteen
(15) days after the receipt  thereof,  deliver to Purchaser  any such rent which
Purchaser  is  entitled  to  hereunder  relating  to the date of Closing and any
period  thereafter,  and (b) if Purchaser collects any unpaid or delinquent rent
from the Property,  Purchaser shall,  within fifteen (15) days after the receipt
thereof,  deliver to Seller any such rent which  Seller is entitled to hereunder
relating to the period prior to the date of Closing.  Seller and Purchaser agree
that (i) all rent  received by Seller or Purchaser  within the first ninety (90)
day  period  after the date of  Closing  shall be  applied  first to  delinquent
rentals,  if any, in the order of their maturity,  and then to current  rentals,
and (ii) all rent  received by Seller or  Purchaser  after the first ninety (90)
day period after the date of Closing shall be applied  first to current  rentals
and then to delinquent rentals, if any, in inverse order of maturity.  Purchaser
will  collect  all rents in the usual  course of  Purchaser's  operation  of the
Property,  but Purchaser will not be obligated to institute any lawsuit or other
collection procedures to collect delinquent rents. In the event that there shall
be any rents or other  charges under any Leases  which,  although  relating to a
period prior to Closing,  do not become due and payable  until after  Closing or
are paid prior to Closing but are subject to adjustment after

                                      -11-

<PAGE>

Closing (such as year end common area expense reimbursements and the like), then
any rents or charges of such type  received by Purchaser or its agents or Seller
or its agents  subsequent to Closing shall, to the extent applicable to a period
extending  through the Closing,  be prorated  between Seller and Purchaser as of
Closing and Seller's  portion  thereof  shall be remitted  promptly to Seller by
Purchaser.

              (h) Pursuant to the  provisions of the Lease between Seller and J.
Reckner,  Seller has agreed to  provide  to the tenant an  allowance  for tenant
improvements  at the rate $26.00 per square foot.  The actual cost of the tenant
improvements  for J. Reckner  will exceed  $26.00 per square foot and Seller has
entered  into a  construction  contract  for  the  construction  of  the  tenant
improvements  for a contract sum in excess of $26.00 per square foot. J. Reckner
has agreed to  reimburse  the Seller for the amount by which the actual  cost of
the tenant improvements  exceeds the allowance of $26.00 per square foot. Seller
shall retain at Closing the right to receive this  reimbursement from J. Reckner
and if it is not  received  by  Seller  prior to  Closing,  it shall be  treated
pursuant  to  subsection  (g) above as if it were  delinquent  rent due prior to
Closing.

         4.6 Closing Costs.

              (a) Seller shall pay (i) the fees of any counsel  representing  it
in connection with this  transaction;  and (ii) one-half (1/2) of any escrow fee
charged by the Title Company.

              (b) Purchaser  shall pay (i) the fees of any counsel  representing
Purchaser  in  connection  with  this  transaction;  (ii) the fee for the  title
examination  and the Title  Commitment and the premium for the Owner's Policy of
Title Insurance to be issued to Purchaser by the Title Company at Closing; (iii)
the cost of the  Survey;  (iv) the fees for  recording  the deed  conveying  the
Property to Purchaser;  (v) all Realty  Transfer Taxes and/or fees,  documentary
stamp taxes or similar  taxes which become  payable by reason of the transfer of
the  Property;  and (vi)  one-half  (1/2) of any escrow fee charged by the Title
Company.

              (c) All other costs and expenses  incident to this transaction and
the closing thereof shall be paid by the party incurring same.

         4.7 Conditions Precedent to Obligation of Purchaser.  The obligation of
Purchaser  to  consummate  the  transaction  hereunder  shall be  subject to the
fulfillment on or before the date of Closing of all of the following conditions,
any or all of which may be waived by Purchaser in its sole discretion:

              (a) Seller  shall have  delivered  to  Purchaser  all of the items
required to be delivered to Purchaser pursuant to the terms of this Agreement.

              (b)  (i)  All of the  representations  and  warranties  of  Seller
contained in this Agreement  shall be true and correct in all material  respects
as of the date of Closing (with appropriate  modifications  permitted under this
Agreement or not materially adverse to Purchaser).


                                      -12-


<PAGE>

                   (ii) In no event shall Seller be liable to Purchaser  for, or
be  deemed  to  be  in  default   hereunder  by  reason  of,  any  breach  of  a
representation or warranty which results from any change that (i) occurs between
the Effective Date and the date of Closing and (ii) is expressly permitted under
the terms of this  Agreement  or is beyond the  reasonable  control of Seller to
prevent;  provided,  however,  that  the  occurrence  of a  change  which is not
permitted  hereunder  or is beyond the  reasonable  control of Seller to prevent
shall, if materially adverse to Purchaser, constitute the non-fulfillment of the
condition  set  forth in this  Section  4.7(b).  If,  despite  changes  or other
matters, the Closing occurs,  Seller's  representations and warranties set forth
in this Agreement shall be deemed to have been modified by such changes or other
matters.

              (c) Seller  shall have  performed  and  observed,  in all material
respects,  all  covenants and  agreements of this  Agreement to be performed and
observed by Seller as of the date of Closing.

         4.8  Conditions  Precedent to Obligation of Seller.  The  obligation of
Seller  to  consummate  the  transaction  hereunder  shall  be  subject  to  the
fulfillment on or before the date of Closing of all of the following conditions,
any or all of which may be waived by Seller in its sole discretion:

              (a) Seller  shall have  received  the  Purchase  Price as adjusted
pursuant to and payable in the manner provided for in this Agreement.

              (b)  Purchaser  shall  have  delivered  to Seller all of the items
required to be delivered to Seller pursuant to the terms of this Agreement.

              (c)  All  of  the  representations  and  warranties  of  Purchaser
contained in this Agreement  shall be true and correct in all material  respects
as of the date of Closing  (with  appropriate  modifications  permitted  by this
Agreement or not materially adverse to Seller).

              (d) Purchaser  shall have performed and observed,  in all material
respects,  all  covenants and  agreements of this  Agreement to be performed and
observed by Purchaser as of the date of Closing.


                                    ARTICLE V

                    REPRESENTATIONS, WARRANTIES AND COVENANTS

         5.1 Representations  and Warranties of Seller.  Seller hereby makes the
following representations and warranties to Purchaser as of the Effective Date:

              5.1.1 Organization and Authority.  Seller is a limited partnership
duly  organized and is validly  existing under the laws of the  Commonwealth  of
Pennsylvania, has the full right and authority to enter into this Agreement and,
subject to the provisions of Section 10.6 hereof,

                                      -13-

<PAGE>



to transfer all of the Property to be conveyed by Seller  pursuant hereto and to
consummate or cause to be consummated the transactions contemplated herein to be
made by  Seller.  The  person  signing  this  Agreement  on  behalf of Seller is
authorized to do so.

              5.1.2 Pending Actions. To Seller's knowledge,  there is no action,
suit, arbitration,  unsatisfied order or judgment, governmental investigation or
proceeding pending against the Property or the transactions contemplated by this
Agreement,  which,  if  adversely  determined,  could  individually  or  in  the
aggregate have a material  adverse effect on the Property or any portion thereof
or which could in any material way interfere with the  consummation by Seller of
the transaction contemplated by this Agreement.

              5.1.3 Leases.

              (a) Seller is the lessor or  landlord or the  successor  lessor or
landlord under the Leases.

              (b) To Seller's knowledge, the Leases are in full force and effect
and true, correct and complete copies thereof have been delivered to Purchaser.

              (c) Except as expressly  provided in this Agreement or the Leases,
to  Seller's  knowledge,  Seller has no  outstanding  obligation  to provide any
tenant with an allowance to construct,  or to construct, at its own expense, any
tenant improvements.

              (d) To Seller's knowledge,  no tenant under the Leases has filed a
petition  in  bankruptcy  or for the  approval  of a plan of  reorganization  or
management under the Federal Bankruptcy Code or any similar state law or made an
admission in writing as to the relief therein  provided or otherwise  become the
subject of any  proceeding  under any federal or state  bankruptcy or insolvency
law, or has  admitted in writing its  inability  to pay its debts as they become
due or made an assignment  for the benefit of creditors,  or has  petitioned for
the appointment of or has had appointed a receiver,  trustee or custodian of any
of its property.

              (e) Except as set forth in the Lease Schedule  attached  hereto as
Exhibit 1.1(e),  to Seller's  knowledge,  there are no other leases or occupancy
agreements to which Seller is a party affecting the Property.

              (f)  Except as  otherwise  set forth in the  Leases,  to  Seller's
knowledge,  no  presently  effective  rent  concessions  have been  given to any
tenants and no rent has been paid in advance by any tenants  respecting a period
subsequent to the Closing.

              (g) Except as set forth in the Lease Schedules  attached hereto as
Exhibit 1.1(e), no tenants have asserted in written notice to Seller any claims,
defenses or offsets to rent accruing from and after the date of Closing.


                                      -14-
<PAGE>


              (h) Except as set forth in the Lease Schedules  attached hereto as
Exhibit 1.1(e), to Seller's knowledge, no monetary default and no other material
default, delinquency or breach exists on the part of any tenant.

              (i) Except as set forth in the Lease Schedules  attached hereto as
Exhibit  1.1(e),  there are no material  defaults or breaches on the part of the
landlord under any Lease.

              (j) In the event that any Tenant  Estoppel  delivered to Purchaser
with respect to any Lease shall  contain any statement of fact,  information  or
other  matter  which  is  inconsistent  with  the  matters  stated  in  Seller's
representations  in this Section  5.1.3,  the Tenant  Estoppel shall control and
Seller  shall  have  no  liability   for  any  claim  based  upon  a  breach  of
representation  regarding  such  statement of fact,  information or other matter
contained in the Tenant Estoppel.

              (k)  Notwithstanding  anything to the  contrary  contained in this
Agreement,  Seller does not represent or warrant that any particular  Lease will
be in force or effect at Closing or that the tenants  under the Leases will have
performed their obligations thereunder.

              (l) Except as otherwise expressly provided in this Agreement,  the
termination  of any Lease  prior to  Closing by reason of the  tenant's  default
shall not affect the obligations of Purchaser under this Agreement in any manner
or entitle  Purchaser to an abatement of or credit against the Purchase Price or
give rise to any other claim on the part of Purchaser.

              5.1.4 Lease Brokerage.  To Seller's knowledge,  there are no lease
brokerage   agreements,   leasing  commission  agreements  or  other  agreements
providing  for  payments  of any amounts for  leasing  activities  or  procuring
tenants with respect to the Property other than as disclosed in Exhibit 5.1.4.

              5.1.5 No Violations.  Except as set forth on Exhibit 5.1.5, Seller
has not received any written notice from any  governmental  or public  authority
(i) that the Property is in violation of any applicable  housing,  fire, health,
building,  safety,  use,  occupancy  or  zoning  laws or  ordinance  where  such
violation remains  uncorrected and outstanding or (ii) that any work is required
to be done upon or in  connection  with the  Property,  where such work  remains
outstanding and, if unaddressed, would have a material adverse effect on the use
of the Property as currently owned and operated.

              5.1.6  Condemnation.  To  Seller's  knowledge,  no eminent  domain
proceedings relating to the Property are pending or threatened.

              5.1.7 Insurance.  To Seller's  knowledge,  Seller has not received
any written notice from any insurance  company or board of fire  underwriters of
any  defects or  inadequacies  in or on the  Property  or any part or  component
thereof that would materially and adversely affect the

                                      -15-

<PAGE>

insurability of the Property or cause any material  increase in the premiums for
insurance for the Property that have not been cured or repaired.

              5.1.8 Environmental Matters.

              (a) Except as set forth in any environmental assessment reports in
Seller's  possession  and  disclosed to  Purchaser or as otherwise  disclosed to
Purchaser,  to Seller's knowledge,  Seller has received no written  notification
from any  governmental  or  quasi-governmental  authority that it has determined
that  there  are  any  violations  of  environmental  statutes,   ordinances  or
regulations affecting the Property.

              (b) As used herein,  "Hazardous Substances" means all hazardous or
toxic  materials,  substances,  pollutants,  contaminants,  or wastes  currently
identified as a hazardous substance or waste in the Comprehensive  Environmental
Response,  Compensation  and Liability Act of 1980 (commonly known as "CERCLA"),
as amended,  the Superfund Amendments and Reauthorization Act (commonly known as
"SARA"), the Resource  Conservation and Recovery Act (commonly known as "RCRA"),
or any other federal, state or local legislation or ordinances applicable to the
Property.

              (c)  Purchaser  waives and  releases  Seller  from any  present or
future  claims by Purchaser  arising from or relating to the presence or alleged
presence  of any  Hazardous  Substances  in,  on,  under or about  the  Property
including,  without  limitation,  any claims  under or on account of (i) CERCLA,
SARA,  RCRA,  and  similar  state  statutes,  and  any  regulations  promulgated
thereunder,  (ii) any other  federal,  state or local  law,  ordinance,  rule or
regulation,  now or  hereafter  in effect,  that deals with or  otherwise in any
manner relates to, environmental matters of any kind, or (iii) the common law.

              5.1.9 The zoning  classification of the Property is C-5 Commercial
and the  present  use of the  Property  is in  compliance  with  the  applicable
provisions of the Philadelphia Zoning Code.

              5.1.10  Agreements,  Etc.  Other than the  Leases,  the  Permitted
Encumbrances  and the  Operating  Agreements,  Seller has not  entered  into any
contract or  agreement  with  respect to the  Property  which will be binding on
Purchaser after the Closing, other than contracts and agreements which Purchaser
has  agreed  in  writing  to  assume  prior to the  Approval  Date or which  are
terminable upon thirty (30) days notice without payment of premium or penalty.

         5.2 Knowledge  Defined.  References to the  "knowledge" of Seller shall
refer only to the current  actual  knowledge  of the  Designated  Employees  (as
hereinafter defined) and shall not be construed,  by imputation or otherwise, to
refer to the knowledge of Seller,  or any  affiliate of Seller,  to any property
manager, or to any other officer, agent, manager,  representative or employee of
Seller, or any affiliate of Seller, or to impose upon such Designated  Employees
any duty to investigate  the matter to which such current actual  knowledge,  or
the absence thereof,  pertains. As used herein, the term "Designated  Employees"
shall refer to the following persons: (a) Joseph C.

                                      -16-
<PAGE>



Thomas,  Jr.,  and;  (b) Mark  Melhuish,  who are the Property  Asset  Manager's
principal employees responsible for the management of the Property.

         5.3 Survival of Seller's Representations and Warranties.

              (a) The representations and warranties of Seller set forth in this
Agreement  as updated by the  Certificate  of Seller  delivered  to Purchaser at
Closing pursuant to subsection  4.1(k) shall survive Closing for a period of 180
days.

              (b) No claim for a breach of any  representation  or  warranty  of
Seller shall be  actionable  or payable:  (i) if the breach in question  results
from or is based on a condition,  state of facts or other matter which was known
to  Purchaser  prior to Closing;  or (ii)  unless the valid  claims for all such
breaches collectively  aggregate more than Fifty Thousand Dollars ($50,000),  in
which  event,  the full amount of such  claims  shall be  actionable;  and (iii)
unless  written notice  containing a description of the specific  nature of such
breach shall have been given by Purchaser to Seller prior to the  expiration  of
said 180 day period and an action shall have been commenced by Purchaser against
Seller within 270 days of Closing.

         5.4  Continuing  Obligations  of  Seller.  Seller  hereby  agrees  with
Purchaser as follows:

              5.4.1  From the  Effective  Date  until  the  Closing  or  earlier
termination of this  Agreement,  Seller shall use reasonable  efforts to operate
and maintain the Property in a manner  generally  consistent  with the manner in
which Seller has operated and maintained the Property prior to the date hereof.

              5.4.2 Seller shall use reasonable  efforts (but without obligation
to incur any cost or  expense)  to obtain  and  deliver  to  Purchaser  prior to
Closing,  a written  estoppel  certificate in the form of Exhibit 5.4.2 attached
hereto or on such other form as may be provided for in any Lease, signed by each
tenant occupying space in the Improvements. The signed certificates are referred
to herein as the "Tenant  Estoppels".  If, after the use of reasonable  efforts,
Seller has not obtained Tenant Estoppels from each of PNC Bank, N.A.;  Schnader,
Harrison,  Segal & Lewis;  and Peat Marwick,  Purchaser  shall have the right to
terminate  this  Agreement  by written  notice to Seller  given on or before the
sooner of (a) the date of Closing or (b) the date  occurring  two days after the
date on which  Seller has  notified  Purchaser  that  Seller will not be able to
obtain the Estoppel  Certificates  from the three tenants  designated  above. If
Purchaser  terminates  this Agreement  pursuant to the preceding  sentence,  the
Deposit and all interest  accrued  thereon  shall be returned to  Purchaser  and
neither party shall have any further rights or obligations under this Agreement,
except as otherwise provided in Section 10.21 below.

              5.4.3 A copy of any  request  by a tenant  under any of the Leases
for the  agreement of Seller to consent to a renewal or expansion of an existing
Lease (to the extent such  consent or approval is  required)  or to enter into a
new  Lease,  all for  occupancy  of  1,000  square  feet or more of space in the
Improvements ("Major Lease Transaction") which Seller wishes to grant or

                                      -17-
<PAGE>

execute  between the Effective Date and the date of Closing will be submitted to
Purchaser  prior to execution  by Seller.  With respect to each such Major Lease
Transaction:

              (a) Purchaser  agrees to notify Seller in writing  within five (5)
business days after its receipt  thereof of either its approval or  disapproval,
including all Tenant Inducement Costs and leasing  commissions to be incurred in
connection therewith.

              (b) In the event Purchaser  informs Seller that Purchaser does not
approve the Major Lease  Transaction,  which approval shall not be  unreasonably
withheld,  Seller  shall have the  option to cancel  this  Agreement  by written
notice thereof to Purchaser within five (5) business days after Seller's receipt
of written  notice of  Purchaser's  disapproval  thereof  and,  upon  refund and
payment of the  Deposit  to  Purchaser,  neither  party  shall have any  further
liability  or  obligation  hereunder,  unless  Purchaser  shall,  within two (2)
business days after Seller's termination notice, rescind its disapproval of such
Major Lease Transaction.

              (c) In the event  Purchaser  fails to notify  Seller in writing of
its approval or disapproval of the Major Lease  Transaction  within the five (5)
day time period for such purpose set forth above,  such failure  shall be deemed
the approval by Purchaser.

              (d) At Closing,  Purchaser shall  reimburse  Seller for any Tenant
Inducement Costs, leasing commissions and other expenses,  including legal fees,
incurred by Seller pursuant to each Major Lease Transaction  approved (or deemed
approved) after the Effective Date by Purchaser.

              (e)  Seller  shall have the  unrestricted  right to enter into new
Leases for less than 1,000 square feet of space in the Improvements or grant its
approval (to the extent  required) to a renewal of existing Leases for less than
1,000 square feet so long as such Leases or renewals  are within the  guidelines
set forth in Exhibit 5.4.3(e).

         5.5  Representations  and  Warranties  of Purchaser.  Purchaser  hereby
represents and warrants to Seller as of the date of this Agreement and as of the
date of Closing:

              5.5.1  Purchaser is not  acquiring the Property with the assets of
an employee benefit plan as defined in Section 3(3) of ERISA.

              5.5.2  Purchaser  has the  full  right,  power  and  authority  to
purchase the Property as provided in this Agreement,  is acting as the principal
in this  transaction  with the  authority to carry out  Purchaser's  obligations
hereunder,  and all requisite action  necessary to authorize  Purchaser to enter
into this Agreement and to carry out its obligations  hereunder have been, or by
the Closing will have been,  taken.  The person signing this Agreement on behalf
of Purchaser is authorized to do so.

              5.5.3 There is no action, suit, arbitration,  unsatisfied order or
judgment,  government  investigation  or proceeding  pending  against  Purchaser
which, if adversely determined,

                                      -18-

<PAGE>



could   individually  or  in  the  aggregate   materially   interfere  with  the
consummation of the transactions contemplated by this Agreement.

              5.5.4  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
against or contemplated by Purchaser or any of its general partners.

              5.5.5 As of the Closing, Purchaser acknowledges and agrees that it
will have inspected the Property  fully and completely (to the extent  Purchaser
determines  to do so in its  sole  discretion)  at its  expense  and  will  have
ascertained to its satisfaction  the extent to which the Property  complies with
applicable  zoning,  building,  environmental,  health  and safety and all other
laws, codes and regulations.

              5.5.6 As of the Closing, Purchaser acknowledges and agrees that it
will have reviewed the Leases, contracts, expenses and other matters relating to
the Property  and,  based upon its own  investigations,  inspections,  tests and
studies, will have determined whether to purchase the Property.

         5.6  Survival  of  Purchaser's   Representations  and  Warranties.  The
representation and warranties of Purchaser set forth in this Agreement,  as they
may be updated by the  Certificate of Purchaser  delivered to Seller at Closing,
pursuant to subsection 4.2(e), shall survive Closing for a period of 270 days.

         5.7 Continuing  Obligations of Purchaser.  Purchaser hereby agrees with
Seller  that  Purchaser  shall,  in  connection  with its  investigation  of the
Property  prior to Closing,  inspect the  Property for the presence of Hazardous
Substances  and shall  furnish  to  Seller  copies of any  reports  received  by
Purchaser in connection with any such inspection.  Purchaser hereby assumes full
responsibility   for  such   inspections   and,   except  for  claims  based  on
representations or warranties contained in Section 5.1.8, irrevocably waives any
claim against  Seller  arising from the presence of Hazardous  Substances on the
Property.  Purchaser  shall also furnish to Seller  copies of any other  reports
received  by  Purchaser  relating  to any  other  inspections  of  the  Property
conducted  on  Purchaser's  behalf,  if any  (including,  specifically,  without
limitation, any reports analyzing compliance of the Property with the provisions
of the Americans with Disabilities Act ("ADA"), 42 U.S.C.  ss.12101, et seq., if
applicable).


                                   ARTICLE VI

                                     DEFAULT

         6.1 Default by  Purchaser.  If Purchaser  fails to complete  Closing in
default  of  Purchaser's  obligations  under  this  Agreement,  Seller  shall be
entitled,  as its sole  remedy , to  terminate  this  Agreement  and receive the
Deposit as  liquidated  damages for the breach of this  Agreement.  It is agreed
between the parties hereto that the actual damages to Seller in the event of

                                      -19-

<PAGE>

such  breach are  impractical  to  ascertain  and the amount of the Deposit is a
reasonable estimate thereof.

         6.2 Default by Seller. If Seller fails to consummate this Agreement for
any reason (other than Purchaser's  default,  Seller's  inability to perform its
obligations hereunder,  or the permitted termination of this Agreement by Seller
or Purchaser as herein  expressly  provided,  (in which event  Purchaser's  sole
remedy shall be to terminate  this  Agreement  and have the Deposit  returned)),
Purchaser  shall be entitled,  as its sole and exclusive  remedy,  either (a) to
receive the return of the Deposit and all interest accrued thereon, which return
shall operate to terminate  this  Agreement and release  Seller from any and all
liability  hereunder,  or (b) to enforce  specific  performance  of or  Seller's
obligation  to  execute  the  documents  required  to  convey  the  Property  to
Purchaser;  it is understood and agreed that the remedy of specific  performance
shall not be available to enforce any other obligation of Seller hereunder.

              6.2.1 Purchaser expressly waives its rights to seek damages in the
event of or Seller's default hereunder.

              6.2.2  Purchaser shall be deemed to have elected to terminate this
Agreement  and  receive  back the Deposit and all  interest  accrued  thereon if
Purchaser fails to file suit for specific  performance against Seller in a court
having  jurisdiction in Philadelphia,  Pennsylvania on or before sixty (60) days
following the date upon which Closing was to have occurred.


                                   ARTICLE VII

                                  RISK OF LOSS

         7.1 Minor Damage. In the event of loss or damage to the Property or any
portion  thereof which is not "major" (as hereinafter  defined),  this Agreement
shall remain in full force and effect  provided  Seller  performs any  necessary
repairs or, at Seller's  option,  assigns to  Purchaser  all of Seller's  right,
title and  interest to any claims and  proceeds  Seller may have with respect to
any casualty insurance policies or condemnation  awards relating to the premises
in question.

              7.1.1 In the event that Seller elects to perform  repairs upon the
Property,  Seller shall use reasonable efforts to complete such repairs promptly
and the date of Closing  shall be extended a  reasonable  time in order to allow
for the  completion of such repairs.  Any such repairs shall be performed to the
reasonable satisfaction of Purchaser.

              7.1.2 If Seller  elects to assign a casualty  claim to  Purchaser,
the Purchase  Price shall be reduced by the amount  applicable  to such claim of
any deductible amounts under Seller's insurance policy.


                                      -20-
<PAGE>



         7.2 Major Damage.  In the event of a "major" loss or damage,  Purchaser
may terminate this Agreement by written notice to the Seller, in which event the
Deposit (and all interest accrued thereon) shall be returned to Purchaser.

              (a) If Purchaser elects not to terminate this Agreement within ten
(10) business days after Seller sends Purchaser written notice of the occurrence
of major  loss or  damage,  then  Purchaser  shall be deemed to have  elected to
proceed with  Closing,  in which event  Seller shall assign to Purchaser  all of
Seller's  right,  title and interest to any claims and proceeds  Seller may have
with respect to any casualty insurance policies or condemnation  awards relating
to the premises in question.

         7.3 Risk of Loss.  Upon Closing,  full risk of loss with respect to the
Property shall pass to Purchaser.

         7.4 Definition of "Major" Loss or Damage.  For purposes of Sections 7.1
and 7.2,  "major" loss or damage refers to the following:  (i) loss or damage to
the Property or any portion thereof such that the cost of repairing or restoring
the premises in question to a condition  substantially  identical to that of the
premises in question prior to the event of damage would be, in the opinion of an
architect selected by Seller and reasonably  approved by Purchaser,  equal to or
greater  than  Two  Million  Dollars  ($2,000,000),  (ii)  any  loss  due  to  a
condemnation  which  permanently  and materially  impairs the current use of the
Property,  and  (iii)  any  loss or  damage  such  that any of PNC  Bank,  N.A.,
Schnader,  Harrison,  Segal & Lewis or Peat  Marwick  shall  have  the  right to
terminate its lease.

         7.5 Casualty Insurance.  Seller covenants that it maintains, and, until
Closing, shall continue to maintain so-called "all risk" property insurance on a
replacement cost basis in the amount of $200,710,000.


                                  ARTICLE VIII

                                   COMMISSIONS

         8.1 Brokerage Commissions.

              (a) In the event the transaction contemplated by this Agreement is
consummated,  but not otherwise, Seller agrees to pay to Eastdil Realty Company,
L.L.C. (the "Broker") at Closing a brokerage  commission  pursuant to a separate
written agreement between Seller and Broker.

              (b) Each of Seller and  Purchaser  represents  and warrants to the
other that it dealt with no broker or finder in this transaction, other than the
Broker.  Each  party  agrees  that  should  any  claim  be  made  for  brokerage
commissions  or finder's  fees by any broker or finder other than the Broker by,
through  or on  account  of any acts of said  party or its  representatives,  or
should

                                      -21-
<PAGE>


its  representation  and warranty in this Section  8.1(b) be untrue,  said party
will  indemnify  and hold the other party free and harmless from and against any
and all loss, liability,  cost, damage and expense in connection therewith or by
reason thereof.


                                   ARTICLE IX

                             DISCLAIMERS AND WAIVERS

         9.1 No Reliance on Documents. Except as expressly stated herein, Seller
makes no representation or warranty as to the truth, accuracy or completeness of
any  materials,  data or  information  delivered  by or on  behalf  of Seller to
Purchaser in connection with the transaction contemplated hereby.

              9.1.1 Purchaser  acknowledges and agrees that all materials,  data
and  information  delivered by or on behalf of Seller to Purchaser in connection
with  the  transaction  contemplated  hereby  are  provided  to  Purchaser  as a
convenience  only and that any  reliance  on or use of such  materials,  data or
information  by  Purchaser  shall be at the sole  risk of  Purchaser,  except as
otherwise expressly stated herein.

              9.1.2 Without limiting the generality of the foregoing provisions,
Purchaser  acknowledges  and agrees that (a) any  environmental  or other report
with  respect to the  Property  which is  delivered by or on behalf of Seller to
Purchaser shall be for general informational  purposes only, (b) Purchaser shall
not have any  right to rely on any such  report  delivered  by or on  behalf  of
Seller  to  Purchaser,   but  rather  will  rely  on  its  own  inspections  and
investigations  of the Property and any reports  commissioned  by Purchaser with
respect thereto,  and (c) neither Seller, any affiliate of Seller nor the person
or entity which prepared any such report  delivered by or on behalf of Seller to
Purchaser  shall  have any  liability  to  Purchaser  for any  inaccuracy  in or
omission from any such report.

         9.2 Disclaimers. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, IT IS
UNDERSTOOD AND AGREED THAT SELLER IS NOT MAKING AND HAS NOT AT ANY TIME MADE ANY
WARRANTIES OR  REPRESENTATIONS  OF ANY KIND OR CHARACTER,  EXPRESSED OR IMPLIED,
WITH RESPECT TO THE PROPERTY,  INCLUDING,  BUT NOT LIMITED TO, ANY WARRANTIES OR
REPRESENTATIONS  AS TO HABITABILITY,  MERCHANTABILITY,  FITNESS FOR A PARTICULAR
PURPOSE, TITLE (OTHER THAN SELLER'S SPECIAL WARRANTY OF TITLE TO BE SET FORTH IN
THE DEED), ZONING, TAX CONSEQUENCES,  LATENT OR PATENT PHYSICAL OR ENVIRONMENTAL
CONDITION, UTILITIES, OPERATING HISTORY OR PROJECTIONS,  VALUATION, GOVERNMENTAL
APPROVALS,  THE  COMPLIANCE OF THE PROPERTY WITH  GOVERNMENTAL  LAWS, THE TRUTH,
ACCURACY OR  COMPLETENESS  OF THE PROPERTY  DOCUMENTS  OR ANY OTHER  INFORMATION
PROVIDED BY OR ON BEHALF OF SELLER TO  PURCHASER,  OR ANY OTHER  MATTER OR THING
REGARDING THE PROPERTY. PURCHASER ACKNOWLEDGES AND AGREES THAT UPON CLOSING

                                      -22-
<PAGE>

SELLER  SHALL  SELL AND  CONVEY TO  PURCHASER  AND  PURCHASER  SHALL  ACCEPT THE
PROPERTY  "AS IS,  WHERE IS, WITH ALL  FAULTS",  EXCEPT TO THE EXTENT  EXPRESSLY
PROVIDED OTHERWISE IN THIS AGREEMENT. PURCHASER HAS NOT RELIED AND WILL NOT RELY
ON,  AND  SELLER  IS NOT  LIABLE  FOR OR BOUND  BY,  ANY  EXPRESSED  OR  IMPLIED
WARRANTIES, GUARANTIES, STATEMENTS, REPRESENTATIONS OR INFORMATION PERTAINING TO
THE PROPERTY OR RELATING THERETO (INCLUDING  SPECIFICALLY,  WITHOUT  LIMITATION,
PROPERTY  INFORMATION PACKAGES DISTRIBUTED WITH RESPECT TO THE PROPERTY) MADE OR
FURNISHED BY OR ON BEHALF OF SELLER,  THE MANAGER OF THE  PROPERTY,  OR ANY REAL
ESTATE  BROKER OR AGENT  REPRESENTING  OR  PURPORTING  TO REPRESENT  SELLER,  TO
WHOMEVER MADE OR GIVEN,  DIRECTLY OR  INDIRECTLY,  ORALLY OR IN WRITING,  UNLESS
SPECIFICALLY AND EXPRESSLY SET FORTH IN THIS AGREEMENT.  PURCHASER REPRESENTS TO
SELLER THAT  PURCHASER HAS  CONDUCTED,  OR WILL CONDUCT  PRIOR TO CLOSING,  SUCH
INVESTIGATIONS  OF THE PROPERTY,  INCLUDING BUT NOT LIMITED TO, THE PHYSICAL AND
ENVIRONMENTAL CONDITIONS THEREOF, AS PURCHASER DEEMS NECESSARY TO SATISFY ITSELF
AS TO THE  CONDITION  OF THE  PROPERTY  AND THE  EXISTENCE  OR  NONEXISTENCE  OR
CURATIVE ACTION TO BE TAKEN WITH RESPECT TO ANY HAZARDOUS OR TOXIC SUBSTANCES ON
OR DISCHARGED FROM THE PROPERTY, AND WILL RELY SOLELY UPON SAME AND NOT UPON ANY
INFORMATION  PROVIDED BY OR ON BEHALF OF SELLER OR ITS AGENTS OR EMPLOYEES  WITH
RESPECT THERETO,  OTHER THAN SUCH  REPRESENTATIONS,  WARRANTIES AND COVENANTS OF
SELLER AS ARE  SPECIFICALLY  AND EXPRESSLY SET FORTH IN THIS  AGREEMENT.  EXCEPT
OTHERWISE AS EXPRESSLY  SET FORTH IN THIS  AGREEMENT,  UPON  CLOSING,  PURCHASER
SHALL  ASSUME THE RISK THAT  ADVERSE  MATTERS,  INCLUDING  BUT NOT  LIMITED  TO,
CONSTRUCTION DEFECTS AND ADVERSE PHYSICAL AND ENVIRONMENTAL CONDITIONS,  MAY NOT
HAVE BEEN REVEALED BY PURCHASER'S  INVESTIGATIONS,  AND PURCHASER, UPON CLOSING,
SHALL BE DEEMED TO HAVE WAIVED,  RELINQUISHED  AND RELEASED SELLER (AND SELLER'S
OFFICERS,  DIRECTORS,  SHAREHOLDERS,  EMPLOYEES AND AGENTS) FROM AND AGAINST ANY
AND ALL CLAIMS,  DEMANDS, CAUSES OF ACTION (INCLUDING CAUSES OF ACTION IN TORT),
LOSSES, DAMAGES, LIABILITIES,  COSTS AND EXPENSES (INCLUDING ATTORNEYS' FEES AND
COURT  COSTS)  OF ANY AND  EVERY  KIND OR  CHARACTER,  KNOWN OR  UNKNOWN,  WHICH
PURCHASER MIGHT HAVE ASSERTED OR ALLEGED AGAINST SELLER (AND SELLER'S  OFFICERS,
DIRECTORS,  SHAREHOLDERS,  EMPLOYEES  AND  AGENTS)  AT ANY TIME BY  REASON OF OR
ARISING OUT OF ANY LATENT OR PATENT CONSTRUCTION DEFECTS OR PHYSICAL CONDITIONS,
VIOLATIONS  OF  ANY  APPLICABLE  LAWS  (INCLUDING,   WITHOUT   LIMITATION,   ANY
ENVIRONMENTAL LAWS) AND ANY AND ALL OTHER ACTS, OMISSIONS, EVENTS, CIRCUMSTANCES
OR MATTERS  REGARDING  THE PROPERTY.  PURCHASER  AGREES THAT SHOULD ANY CLEANUP,
REMEDIATION OR REMOVAL OF HAZARDOUS SUBSTANCES OR OTHER ENVIRONMENTAL CONDITIONS
ON THE PROPERTY BE REQUIRED AFTER THE DATE OF CLOSING, SUCH CLEAN-UP, REMOVAL

                                      -23-

<PAGE>

OR REMEDIATION SHALL BE THE RESPONSIBILITY OF AND SHALL BE PERFORMED AT THE SOLE
COST AND EXPENSE OF PURCHASER.

         9.3  Effect  and  Survival  of   Disclaimers.   Seller  and   Purchaser
acknowledge that the compensation to be paid to Seller for the Property has been
decreased  to take into  account  that the Property is being sold subject to the
provisions of this Article IX.


                                    ARTICLE X

                                  MISCELLANEOUS

         10.1  Confidentiality.  Purchaser and its representatives shall hold in
strictest confidence all data and information obtained with respect to Seller or
its business,  or the Property,  whether  obtained before or after the execution
and delivery of this Agreement, and shall not disclose the same to others.

              10.1.1 It is  understood  and agreed that  Purchaser  may disclose
such data and information to the employees,  consultants,  accountants,  lenders
and attorneys of Purchaser  provided that such persons agree in writing to treat
such data and  information  confidentially.  Purchaser  may also  disclose  such
information  to the  extent  required  by law or  the  Securities  and  Exchange
Commission.

              10.1.2 In the event this  Agreement  is  terminated  or  Purchaser
fails to  perform  hereunder,  Purchaser  shall  promptly  return to Seller  any
statements, documents, schedules, exhibits or other written information obtained
from  Seller or anyone  acting  for or on its  behalf  in  connection  with this
Agreement or the transaction contemplated herein.

              10.1.3 It is  understood  and  agreed  that,  with  respect to any
provision of this  Agreement  which refers to the  termination of this Agreement
and the return of the Deposit to  Purchaser,  such Deposit shall not be returned
to Purchaser  unless and until  Purchaser has fulfilled its obligation to return
to Seller the materials described in Section 10.1.2.

              10.1.4 In the event of a breach or threatened  breach by Purchaser
or its agents or  representatives of this Section 10.1, Seller shall be entitled
to an injunction  restraining  Purchaser or its agents or  representatives  from
disclosing, in whole or in part, such confidential information.

              10.1.5  Nothing  herein shall be construed as  prohibiting  Seller
from pursuing any other available  remedy at law or in equity for such breach or
threatened breach.

         10.2 Public  Disclosure.  Any release to the public of information with
respect  to the  sale  contemplated  herein  or any  matters  set  forth in this
Agreement  will be made only in the form  approved by  Purchaser  and Seller and
their  respective  counsel,  which approval shall not be unreasonably  withheld,
delayed or conditioned.

                                      -24-

<PAGE>



         10.3 Discharge of Obligations.  The acceptance of the Deed by Purchaser
shall be deemed to be a full  performance and discharge of every  representation
and warranty  made by Seller herein and every  agreement  and  obligation on the
part of Seller to be performed  pursuant to the  provisions  of this  Agreement,
except those which are herein specifically stated to survive Closing.

         10.4 Assignment.

              (a)  Purchaser  may not  assign its  rights  under this  Agreement
without first obtaining  Seller's written approval,  which approval may be given
or  withheld  in  Seller's  sole  discretion.   Notwithstanding  the  foregoing,
Purchaser may, upon notice to Seller,  assign this Agreement to, or designate to
receive title to the Property, any affiliate of Purchaser; provided that no such
assignment or designation  shall relieve  Purchaser from its  obligations  under
this Agreement.


              (b)  Under no  circumstances  shall  Purchaser  have the  right to
assign this Agreement to any person or entity owned or controlled by an employee
benefit  plan if  Seller's or  Seller's  sale of the  Property to such person or
entity would,  in the reasonable  opinion of Seller's or Seller's ERISA advisor,
create or otherwise cause a "prohibited transaction" under ERISA.

              (c) In the event Purchaser assigns this Agreement or transfers any
ownership interest in Purchaser,  and such assignment or transfer would make the
consummation of the transaction hereunder a "prohibited transaction" under ERISA
and  necessitate the  termination of this Agreement  then,  notwithstanding  any
contrary provision which may be contained herein, Seller shall have the right to
pursue any remedy  available at law or in equity as a result of such  assignment
or transfer.

         10.5 Notices.  Any notice  pursuant to this Agreement shall be given in
writing by (a) personal  delivery,  or (b) reputable  overnight delivery service
with proof of delivery,  or (c) United States Mail, postage prepaid,  registered
or  certified  mail,  return  receipt   requested,   or  (d)  legible  facsimile
transmission  sent to the intended  addressee at the address set forth below, or
to such other  address or to the attention of such other person as the addressee
shall have designated by written notice sent in accordance  herewith,  and shall
be deemed to have been given either at the time of personal delivery, or, in the
case of expedited  delivery  service or mail, as of the date of first  attempted
delivery at the address and in the manner  provided  herein,  or, in the case of
facsimile  transmission,  as of the date of the facsimile  transmission provided
that an original of such  facsimile  is also sent to the  intended  addressee by
means  described in clauses (a), (b) or (c) above.  Unless changed in accordance
with the preceding  sentence,  the addresses for notices given  pursuant to this
Agreement shall be as follows:


                                      -25-

<PAGE>


                           If to Seller:

                           c/o ERE Yarmouth
                           787 Seventh Avenue
                           New York, NY  10019
                           Attention:  Mark Melhuish
                           TELECOPY:   202-223-2246

                           with a copy to:

                           Wolf, Block, Schorr and Solis-Cohen LLP
                           12th Floor Packard Building
                           111 South 15th Street
                           Philadelphia, PA  19102-2678
                           Attention:  Henry F. Miller, Esquire
                           TELECOPY:  (215) 977-2334

                           If to Purchaser:

                           Health and Retirement Properties Trust
                           400 Centre Street
                           Newton, MA  02158
                           Attn:  David J. Hegarty
                           TELECOPY:  617-332-2261

                           with a copy to:

                           Jennifer B. Clark, Esq.
                           Sullivan & Worcester LLP
                           One Post Office Square
                           Boston, MA  02109
                           TELECOPY:  617-338-2880

         10.6 Binding Effect.

              (a) This  Agreement  shall not be binding  in any way upon  Seller
unless and until (i) Seller  shall  execute and  deliver the same to  Purchaser,
(ii) each stage of  Seller's  investment  approval  process  has  approved  this
transaction,  and (iii) Seller's respective  Investment Committee has thereafter
given its written approval thereof.

              (b)  If  Seller  has  not  given  Purchaser  written  notice  (the
"Approval  Notice") of the approvals referred to in Section 10.6(a) on or before
the  date  (the  "Approval  Deadline")  occurring  fifteen  (15) day  after  the
Effective Date, or if prior to the Approval Deadline

                                      -26-
<PAGE>

Seller notifies  Purchaser in writing that this Agreement has been  disapproved,
then this Agreement  shall be deemed  terminated and Purchaser shall be entitled
to the return of the Deposit.

              (c) It is  understood  and agreed  that at each stage of  Seller's
investment  approval process,  Seller or its investment  advisor,  ERE-Yarmouth,
Inc., shall each have the right, in its unfettered discretion, to disapprove the
transaction  contemplated by this Agreement for any reason  whatsoever,  without
obligation  thereafter  to  proceed  to the next  stage of  Seller's  investment
approval process. Seller's approval of this Agreement shall be evidenced only by
both Seller's  execution of this Agreement and Seller's  sending of the Approval
Notice to Purchaser prior to the Approval Deadline and,  accordingly,  Purchaser
acknowledges  and agrees that Purchaser  cannot and will not rely upon any other
statement or action of Seller or their  representatives  as evidence of Seller's
approval  of  this  Agreement  or the  subject  matter  hereof.  Subject  to the
foregoing,  Seller agrees to diligently pursue obtaining all required  approvals
as promptly as possible.

         10.7  Modifications.  This Agreement  cannot be changed orally,  and no
executory agreement shall be effective to waive, change,  modify or discharge it
in whole or in part unless such executory  agreement is in writing and is signed
by the parties against whom enforcement of any waiver,  change,  modification or
discharge is sought.

         10.8 Tenant Notification  Letters.  Purchaser shall deliver to each and
every  tenant  of  the  Property  under  a  Lease  thereof  a  signed  statement
acknowledging  Purchaser's receipt and responsibility for each tenant's security
deposit (to the extent delivered by Seller to Purchaser at Closing), if any, all
in compliance with and pursuant to the applicable provisions of applicable law.

         10.9  Calculation  of Time  Periods.  Unless  otherwise  specified,  in
computing any period of time described in this Agreement,  the day of the act or
event  after  which the  designated  period  of time  begins to run is not to be
included  and the last day of the period so computed is to be  included,  unless
such  last day is a  Saturday,  Sunday  or legal  holiday  under the laws of the
Commonwealth of Pennsylvania,  in which event the period shall run until the end
of the next day which is neither a Saturday,  Sunday or legal holiday. The final
day of any such period shall be deemed to end at 5 p.m., local time.

         10.10 Successors and Assigns. Subject to the provision of Section 10.4,
the terms and provisions of this Agreement  shall inure to the benefit of Seller
and its successors and assigns and to the benefit of Purchaser and its permitted
successors  and assigns;  and shall be binding on Seller and Purchaser and their
respective successors and assigns.

         10.11  Entire  Agreement.  This  Agreement,   including  the  Exhibits,
contains  the entire  agreement  between the parties  pertaining  to the subject
matter  hereof and fully  supersedes  all prior written or oral  agreements  and
understandings between the parties pertaining to such subject matter.


                                      -27-
<PAGE>

         10.12  Further  Assurances.  Each party  agrees  that it will,  without
further  consideration,  execute and deliver such other  documents and take such
other  action,  whether  prior or  subsequent  to Closing,  as may be reasonably
requested  by the other party to  consummate  more  effectively  the purposes or
subject  matter  of this  Agreement.  Without  limiting  the  generality  of the
foregoing,  Purchaser shall, if requested by Seller, execute  acknowledgments of
receipt with  respect to any  materials  delivered  by Seller to Purchaser  with
respect to the Property.

         10.13 Counterparts. This Agreement may be executed in counterparts, and
all such executed counterparts shall constitute the same agreement.  It shall be
necessary to account for only one such counterpart  containing signatures of all
of the parties to this Agreement in proving this Agreement.

         10.14 Severability. If any provision of this Agreement is determined by
a court of competent jurisdiction to be invalid or unenforceable,  the remainder
of this Agreement shall nonetheless remain in full force and effect.

         10.15  Applicable  Law;  Waiver  of Trial by Jury.  THIS  AGREEMENT  IS
PERFORMABLE IN THE  COMMONWEALTH  OF  PENNSYLVANIA  AND SHALL IN ALL RESPECTS BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE  WITH, THE SUBSTANTIVE  FEDERAL LAWS OF
THE UNITED STATES AND THE LAWS OF THE COMMONWEALTH OF  PENNSYLVANIA.  SELLER AND
PURCHASER HEREBY  IRREVOCABLY SUBMIT TO THE JURISDICTION OF ANY STATE OR FEDERAL
COURT SITTING IN THE  COMMONWEALTH  OF  PENNSYLVANIA IN ANY ACTION OR PROCEEDING
ARISING OUT OF OR RELATING TO THIS AGREEMENT AND HEREBY  IRREVOCABLY  AGREE THAT
ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING SHALL BE HEARD AND DETERMINED
IN A STATE OR FEDERAL COURT SITTING IN THE  COMMONWEALTH  OF  PENNSYLVANIA.  THE
PARTIES TO THIS AGREEMENT WAIVE TRIAL BY JURY.

         10.16 No Third Party Beneficiary.  The provisions of this Agreement and
of the documents to be executed and delivered at Closing are and will be for the
benefit of Seller and  Purchaser  only and are not for the  benefit of any third
party,  and  accordingly,  no third  party  shall have the right to enforce  the
provisions of this Agreement or of the documents to be executed and delivered at
Closing.

         10.17  Exhibits  and  Schedules.  The  following  schedules or exhibits
attached hereto shall be deemed to be an integral part of this Agreement:

                           1.1(a)     - Description of Land

                           1.1(c)     - Inventory of Personal Property

                           1.1(e)     - Schedule of Leases


                                      -28-

<PAGE>


                           1.1(f)     - List of Operating Agreements

                           2.1        - Title Commitment

                           4.1(j)     - Seller's Title Company Affidavit

                           4.1(n)     - Tenant Notice Letter Form

                           4.1(o)     - Form of FIRPTA Certificate

                           5.1.4      - List of Leasing Commission Agreements

                           5.1.5      - Violation Notice

                           5.4.2      - Form of Tenant Estoppel Certificate

         10.18 Captions.  The section  headings  appearing in this Agreement are
for  convenience of reference  only and are not intended,  to any extent and for
any  purpose,  to limit or  define  the text of any  section  or any  subsection
hereof.

         10.19 Construction.  The parties acknowledge that the parties and their
counsel have  reviewed and revised  this  Agreement  and that the normal rule of
construction to the effect that any  ambiguities are to be resolved  against the
drafting party shall not be employed in the  interpretation of this Agreement or
any exhibits or amendments hereto.

         10.20  Termination  of Agreement.  It is understood  and agreed that if
either  Purchaser or Seller  terminates  this  Agreement  pursuant to a right of
termination granted hereunder,  such termination shall operate to relieve Seller
and  Purchaser  from all  obligations  under  this  Agreement,  except  for such
obligations  as  are  specifically  stated  in  Section  10.21  to  survive  the
termination of this Agreement.

         10.21  Survival.  The  provisions  of the  following  Sections  of this
Agreement  shall survive a termination of this  Agreement or Closing,  and shall
not be merged into the execution and delivery of the Deed: 3.1.4; 4.3; 4.4; 4.5;
4.6;  5.1(limited  in duration as stated in Section 5.3 above);  5.5 (limited in
duration as set forth in Section 5.6 above);  5.7; 6.1; 6.2; 7.3; 8.1; 9.1; 9.2;
9.3; 10.3; 10.5; 10.7; 10.10;  10.11;  10.12; 10.14; 10.15; 10.16; 10.17; 10.18;
10.19; 10.20; 10.22; and 10.24.

         10.22  Recordation.  Purchaser  and  Seller  agree not to  record  this
Agreement or any Memorandum hereof.

         10.23 Proper  Execution.  The submission by Seller to Purchaser of this
Agreement  in  unsigned  form  shall be deemed  to be a  submission  solely  for
Purchaser's  consideration and not for acceptance and execution. Such submission
shall have no binding force and effect, shall not

                                      -29-

<PAGE>

constitute an option,  and shall not confer any rights upon  Purchaser or impose
any  obligations  upon Seller  irrespective of any reliance  thereon,  change of
position or partial performance.

         10.24 No  Partnership.  Nothing  contained in this  Agreement  shall be
construed to create a partnership or joint venture  between or among the parties
or their successors in interest.

         10.26 Financial.  Seller shall deliver to Purchaser  audited  financial
statements for the Property with respect to 1996 and 1997 calendar years and the
period  beginning  January 1, 1998 and ending  March 31,  1998,  such  financial
statements to be prepared by Seller's  regularly engaged  independent  certified
public accountants.  Seller shall also provide Purchaser's accountants with such
certifications  with  respect to such  financial  statements  as  Purchaser  may
reasonably  request  to comply  with law or  applicable  SEC  requirements.  The
provisions of this Section  10.26 shall survive  Closing and shall be subject to
the  confidentiality  provisions  of Section 10.1 and 10.2 above (which for this
purpose shall survive Closing).

         10.27  Nonliability of Trustees.  THE DECLARATION OF TRUST ESTABLISHING
PURCHASER,   A  COPY  OF  WHICH,  TOGETHER  WITH  ALL  AMENDMENTS  THERETO  (THE
"DECLARATION"), IS DULY FILED WITH THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF
THE STATE OF MARYLAND, PROVIDES THAT THE NAME "HEALTH AND RETIREMENT DECLARATION
COLLECTIVELY  AS  TRUSTEES,  BUT NOT  INDIVIDUALLY  OR  PERSONALLY,  AND THAT NO
TRUSTEE, OFFICER,  SHAREHOLDER,  EMPLOYEE OR AGENT OF PURCHASER SHALL BE HELD TO
ANY PERSONAL  LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM
AGAINST,  PURCHASER.  ALL PERSONS DEALING WITH PURCHASER, IN ANY WAY, SHALL LOOK
ONLY TO THE ASSETS OF PURCHASER FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF
ANY OBLIGATION. THE PROVISIONS OF THIS SECTION 10.27 SHALL SURVIVE CLOSING.


                                      -30-

<PAGE>



         IN  WITNESS  WHEREOF,  the  parties  hereto  have  duly  executed  this
Agreement as of the Effective Date.

                                     SELLER:

                                     MSA 1600 ASSOCIATES, L.P.,
                                     a Pennsylvania limited partnership

                                     By: Its General Partner
                                            MSA 1600 Associates A-I,

                                             By Its General Partners
                                                  MSA 1600 B-I, Inc.

                                                  By: /s/ Joseph C. Thomas, Jr.
                                                           President

                                                  MSA  1600 B-II, Inc.

                                                  By: /s/ Joseph C. Thomas, Jr.
                                                           President

                                     BUYER:

                                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                     By: /s/ David J. Hegarty


                                      -31-

<PAGE>





                      Exhibit 1.1(a) - Description of Land


                                      -32-

<PAGE>





                 Exhibit 1.1(c) - Inventory of Personal Property



                                      -33-

<PAGE>





                       Exhibit 1.1(e) - Schedule of Leases



                                      -34-

<PAGE>





                  Exhibit 1.1(f) - List of Operating Agreements



                                      -35-

<PAGE>





                         Exhibit 2.1 - Title Commitment



                                      -36-

<PAGE>





                Exhibit 4.1(j) - Seller's Title Company Affidavit



                                      -37-

<PAGE>





                   Exhibit 4.1(n) - Tenant Notice Letter Form



                                      -38-

<PAGE>





                   Exhibit 4.1(o) - Form of FIRPTA Certificate



                                      -39-

<PAGE>





              Exhibit 5.1.4 - List of Leasing Commission Agreements



                                      -40-
<PAGE>





                        Exhibit 5.1.5 - Violation Notice



                                      -41-

<PAGE>




               Exhibit 5.4.2 - Form of Tenant Estoppel Certificate


                                      -42-




                                                                    Exhibit 23

                         Consent of Independent Auditors


We consent to the incorporation by reference in  Post-effective  Amendment No. 1
to the  Registration  Statement (Form S-3 No. 33-62135) of Health and Retirement
Properties Trust and in the related  Prospectus;  in the Registration  Statement
(Form S-3 No.  333-26887) of Health and Retirement  Properties  Trust and in the
related  Prospectus;  in the Registration  Statement (Form S-3 No. 333-34823) of
Health and Retirement  Properties  Trust and in the related  Prospectus;  in the
Registration  Statement  (Form  S-3 No.  333-29675)  of  Health  and  Retirement
Properties Trust and in the Related  Prospectus;  in the Registration  Statement
(Form S-3 No.  333-47815) of Health and Retirement  Properties  Trust and in the
Related Prospectus;  and in the Registration  Statement (Form S-4 No. 333-47817)
of Health and Retirement  Properties Trust and in the related  Prospectus of our
report  dated March 26,  1998,  with  respect to the  statement  of revenues and
certain  expenses of an office building owned by MSA 1600  Associates,  L.P. for
the year ended December 31, 1997,  included in Health and Retirement  Properties
Trust's Form 8-K filed with the Securities and Exchange Commission.

                                                   /s/ Ernst & Young LLP
                                                   Ernst & Young LLP



Boston, Massachusetts
March 26, 1998


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