HEALTH & RETIREMENT PROPERTIES TRUST
8-K, 1998-05-27
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): May 22, 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, Massachusetts                         02158
(Address of principal executive offices)                      (Zip Code)



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


<PAGE>
         THIS  CURRENT  REPORT   CONTAINS   FORWARD-LOOKING   STATEMENTS.   SUCH
STATEMENTS  ARE SUBJECT TO CERTAIN RISKS AND  UNCERTAINTITIES  WHICH COULD CAUSE
ACTUAL  RESULTS  TO DIFFER  MATERIALLY  FROM  THOSE  ANTICIPATED  OR  PROJECTED.
INVESTORS  ARE CAUTIONED  NOT TO PLACE UNDUE  RELIANCE ON THESE  FORWARD-LOOKING
STATEMENTS WHICH SPEAK ONLY AS OF THE DATE HEREOF. THE REGISTRANT  UNDERTAKES NO
OBLIGATION TO PUBLISH  REVISED  FORWARD-LOOKING  STATEMENTS TO REFLECT EVENTS OR
CIRCUMSTANCES  AFTER THE DATE OR TO  REFLECT  THE  OCCURRENCE  OF  UNANTICIPATED
EVENTS.

Item 2.  Acquisition or Disposition of Assets.

         On  May  22,  1998,   Health  and  Retirement   Properties   Trust  and
subsidiaries (the "Company")  purchased at a discount a mortgage loan secured by
1735  Market  Street  (the  "Property"),   a  commercial  office  property  with
approximately  1.3 million  square feet located in  Philadelphia,  Pennsylvania,
from a group of  institutional  lenders,  for  which  Banque  Paribas,  New York
Branch,  acted as agent,  for $226.0  million plus closing costs in a negotiated
arms' length transaction.

         Concurrently  with its  purchase  of the  mortgage  loan,  the  Company
entered  into an  agreement  (the  "Related  Agreement")  with Nine Penn  Center
Associates,  L.P., a Pennsylvania  limited  partnership  that currently owns the
Property,  and other  parties,  pursuant  to which  the  Company  agreed  not to
exercise its remedies as lender  under the  mortgage  and loan  documents  for a
period of time, and the Company and the other parties agreed during such time to
negotiate,  based on certain  agreed-upon terms,  definitive  agreements for the
Company to acquire all effective beneficial  ownership of the Property,  subject
to a carried interest in the property by certain partners of the Property owner.

         The Related  Agreement  contemplates that the closing under the Related
Agreement  would occur in early  summer,  1998.  The  acquisition  of beneficial
ownership of the Property is subject to the parties'  entering  into  definitive
agreements,  and resolving certain issues. No assurances can be given as to when
or if such  acquisitions  will be  consummated.  The  mortgage  on the  Property
matured on May 26,  1998.  If the  acquisition  of  beneficial  ownership of the
Property is not consummated when scheduled under the Related Agreement  (subject
to extension  by mutual  agreement),  the Related  Agreement  provides  that the
Company  would be entitled to exercise its remedies as lender under the mortgage
and loan documents. The mortgage loan is a non-recourse loan (subject to certain
exceptions).   Realization  on  collateral  for  a  mortgage  loan  may  involve
foreclosure or other judicial proceedings.

         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

         Statements of Revenues and Certain  Expenses for 1735 Market Street for
         the Year Ended  December  31, 1997 and the Three Months Ended March 31,
         1998 (unaudited)

         Report of Independent Public Accountants                         F-1
         Statements of Revenues and Certain Expenses                      F-2
         Notes to Statements of Revenues and Certain Expenses             F-3

     Neither the Company nor its  affiliates  were related to the seller of this
     property. The factors considered by the Company in determining the purchase
     price paid for this property include, among others, the following:

     (i)      the historical  and projected  rents received and likely to be
              received from the property,
     (ii)     the historic and expected operating  expenses,  including real
              estate  taxes,  incurred  and  expected  to be incurred at the
              property,
     (iii)    the credit  quality and nature of the existing  tenants,
     (iv)     the existing lease terms and renewal  options of the leases in
              place,
<PAGE>

     (v)      the market demand for similar space, the rent rates being paid
              compared to existing  rents  being paid in the  building,  and
              opportunities for alternative and new tenancies,
     (vi)     the physical location and condition of the property,  the need
              for repairs and likely cost of repairs,
     (vii)    the expected  tenant  inducements  (such as free rent,  tenant
              improvement allowances, etc.) which might be necessary to fill
              vacant space or renew leases, and
     (viii)   the pricing of  comparable  properties  as evidenced by recent
              arms-length market sales.

     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 March 31, 1998            F-6
     Pro Forma Consolidated Statement of Income for the Three Months 
          Ended March 31, 1998                                            F-7
     Pro Forma Consolidated Statement of Income for the Year Ended 
          December 31, 1997                                               F-8

(c)      Exhibits

         2.1      Purchase  Agreement  between Health and Retirement  Properties
                  Trust ("HRP") and Banque  Paribas as agent,  dated as of April
                  29, 1998.

         2.2      Forbearance  and  Restructuring  Agreement  among  HRP and the
                  other parties named therein, dated as of May 21, 1998.

         23       Consent of Arthur Andersen LLP.






<PAGE>




                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


To Health and Retirement Properties Trust:

We have audited the  statement  of revenues and certain  expenses of 1735 Market
Street for the year ended  December 31,  1997.  This financial  statement is the
responsibility of the Property's management. Our responsibility is to express an
opinion on this financial statement based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards  require that we plan and perform the audit to obtain reasonable
assurance   about   whether  the   financial   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  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

As  discussed  in Note 1, the  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 a Current Report on Form 8-K
of Health and Retirement  Properties Trust, and is not intended to be a complete
presentation of the Property's revenue and expenses.

In our opinion,  the financial  statement  referred to above presents fairly, in
all material  respects,  the revenues and certain expenses of 1735 Market Street
for the year ended  December 31,  1997, in conformity  with  generally  accepted
accounting principles.


                                                    /s/ Arthur Andersen LLP


Philadelphia, Pennsylvania,
May 26, 1998

                                       F-1
<PAGE>

                               1735 MARKET STREET


              STATEMENTS OF REVENUES AND CERTAIN EXPENSES (NOTE 1)



                                                  For the
                                                Year Ended       For the Three
                                               December 31,      Months Ended  
                                                   1997          March 31, 1998
                                               -------------    ---------------
                                                                  (Unaudited)

REVENUES:

Minimum rent (Notes 2, 3 and 4)                  $20,412,000     $ 5,258,000
Tenant reimbursements                              8,908,000       2,152,000
Other income                                         516,000          73,000
                                                 -----------     -----------
Total revenues                                    29,836,000       7,483,000
                                                 -----------     -----------

CERTAIN EXPENSES:

Maintenance and other operating expenses           5,529,000       1,287,000
General and administrative expenses                  312,000          60,000
Real estate taxes                                  4,011,000       1,006,000
Management fees (Note 3)                             424,000         106,000
                                                 -----------     -----------
Total certain expenses                            10,276,000       2,459,000
                                                 -----------     -----------
REVENUES IN EXCESS OF CERTAIN EXPENSES           $19,560,000     $ 5,024,000
                                                 ===========     ===========





   The accompanying notes are an integral part of these financial statements.


                                       F-2
<PAGE>


                               1735 MARKET STREET

              NOTES TO STATEMENTS OF REVENUES AND CERTAIN EXPENSES


1.   BASIS OF PRESENTATION:

The statements of revenues and certain  expenses  reflect the operations of 1735
Market  Street (the  "Property"),  located in  Philadelphia,  Pennsylvania.  The
Property is expected to be acquired by Health and  Retirement  Properties  Trust
(the  "Company")  from Nine Penn Center  Associates  ("the Joint Venture") on or
about  June  1998.   The  Property  has  an  aggregate   net  rentable  area  of
approximately 1.3 million square feet (95% leased as of December 31, 1997). This
statement  of revenues and certain  expenses is to be included in the  Company's
Current Report on Form 8-K, as the above  described  transaction has been deemed
significant pursuant to the rules and regulations of the Securities and Exchange
Commission.

The  accounting  records of the Property are  maintained  on an accrual basis in
accordance  with generally  accepted  accounting  principles.  The  accompanying
financial statements exclude certain expenses such as interest, depreciation and
amortization,  and other costs not directly related to the future  operations of
the Property.

The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the reported  amounts of  contingent  items as of the report date and the
reported amounts of revenues and certain  expenses during the reporting  period.
The ultimate results could differ from those estimates.

The statement of revenues and certain  expenses for the three months ended March
31, 1998 is unaudited;  however,  in the opinion of management,  all adjustments
(consisting  solely  of normal  recurring  adjustments)  necessary  for the fair
presentation  of the statement of revenues and certain  expenses for the interim
period  have  been  included.  The  results  of  the  interim  periods  are  not
necessarily indicative of the results for the full year.

2.   OPERATING LEASES:

Base rents for the  periods  presented  include  straight-line  adjustments  for
rental  revenue  increases in  accordance  with  generally  accepted  accounting
principles.   The  aggregate   rental  revenue   increase   resulting  from  the
straight-line  adjustments was $1,680,000 for the year ended December 31,  1997,
and $396,000 for the three months ended March 31, 1998 (unaudited).

Major  tenants are defined as those who  contribute  10% or greater of the total
rental revenue. During 1997,  approximately 60% of total rental revenue was from
three different tenants who were each  individually  responsible for between 17%
and 23% of the total rental revenue, as follows:

            FMC Corp.                                       23%
            Mellon Bank                                     20%
            Ballard Spahr Andrews & Ingersoll               17%


The Property is leased to tenants under operating  leases with expiration  dates
extending to the year 2015. Future minimum rentals under noncancelable operating
leases, excluding tenant reimbursements of operating expenses as of December_31,
1997, are as follows:

                       1998                    $22,235,000
                       1999                     21,439,000
                       2000                     21,137,000
                       2001                     17,316,000
                       2002                     16,154,000
                       Thereafter               98,569,000
                               


Certain  leases also  include  provisions  requiring  tenants to  reimburse  the
Property for  management  costs and other  operating  expenses up to  stipulated
amounts.

                                       F-3
<PAGE>
3. RELATED PARTY TRANSACTIONS:

The Joint  Venture paid  management  fees of $ 424,000 to  PREIT-RUBIN,  Inc., a
related  party to the Joint  Venture,  based on  percentages  as  defined in the
management agreement. In addition,  PREIT-RUBIN,  Inc. earns leasing commissions
upon execution of tenant leases based upon the base annual rent during the first
ten years of the lease.  In the normal course of  operations,  the Joint Venture
reimburses an affiliate of one of the joint  venturers for payroll and insurance
costs related to the operations of the Property.

Transactions  with  related  parties  for the year ended  December  31, 1997 are
summarized as follows:

           Payroll and insurance costs                            $663,000
           Management fees                                         424,000
           Minimum rent - affiliate of joint venturer              136,000
           Leasing commissions incurred                             77,000


4.   COMMITMENTS:

The Joint Venture has entered into certain operating agreements for maintenance.
The aggregate minimum payments under noncancellable service contract obligations
at December 31, 1997 are approximately $326,000.

The Joint Venture has entered into a lease for certain  equipment which has been
accounted for as a capitalized  lease.  Under the terms of the lease  agreement,
monthly payments of $2,400 are due until 2001.

Under provisions of a lease with a significant tenant, the Landlord, as defined,
is  obligated  to make  certain  rent  adjustment  payments  to such tenant of a
minimum of $15,750,000 and a maximum of $18 million.  Unless  accelerated by the
occurrence  of  certain  payment  events,  as  defined,  including  the  sale or
refinancing of the Property, such amount will become payable on January 1, 1999.
The Property has been accruing  rent payments  since the inception of the lease.
The effect of the future  payments is being accrued at the maximum amount of $18
million as a reduction  of rental  revenue  over the life of the related  lease,
which expires in 2015.  Included in the accompanying  statements of revenues and
certain  expenses  are accrued rent  adjustments  of $720,000 for the year ended
December  31,  1997 and  $180,000  for the three  months  ended  March 31,  1998
(unaudited).

                                       F-4

<PAGE>

                     HEALTH AND RETIREMENT PROPERTIES TRUST

              Unaudited Pro Forma Consolidated Financial Statements

         The following  unaudited pro forma consolidated  balance sheet at March
31,  1998 is  intended to present  the  consolidated  financial  position of the
Company as if the transactions described in the notes hereto were consummated at
March 31, 1998.  The following  unaudited pro forma  consolidated  statements of
income are intended to present the  consolidated  results of  operations  of the
Company as if the  transactions  were  consummated  as of the  beginning  of the
periods presented.  These unaudited pro forma consolidated  financial statements
should be read in  conjunction  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,  incorporated  herein by  reference  to the
Company's  Current  Report on Form 8-K dated February 27, 1998 and the Company's
unaudited  consolidated  financial  statements  for the quarter  ended March 31,
1998, incorporated herein by reference to the Company's Quarterly Report on Form
10-Q  for  the  quarter  ended  March  31,  1998.   These  unaudited  pro  forma
consolidated financial statements are not necessarily indicative of the expected
consolidated  financial position or results of operations of the Company for any
future period. Differences would 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-5

<PAGE>
<TABLE>
<CAPTION>

 HEALTH AND RETIREMENT PROPERTIES TRUST
 Pro Forma Consolidated Balance Sheet
 March 31, 1998
 (dollars in thousands, except per share amounts)
 (unaudited)


                                                                            Recent       1735 Market   Proposed
                                                          Historical    Acquisitions (A)   Street (B)  Offering (C)   Pro Forma
                                                         -----------   ----------------  ------------  ------------  -----------
<S>                                                    <C>             <C>            <C>            <C>           <C>   

                              ASSETS

Real estate properties, at cost:
 Land                                                    $   288,933    $     5,185      $    22,600  $      --      $   316,718
 Buildings and improvements                                1,958,782         46,665          203,400         --        2,208,847
                                                         -----------    -----------      -----------  -----------    -----------
                                                           2,247,715         51,850          226,000         --        2,525,565
 Less accumulated depreciation                              (123,652)          --               --           --         (123,652)
                                                         -----------    -----------      -----------  -----------    -----------
                                                           2,124,063         51,850          226,000         --        2,401,913
Real estate mortgages and notes, net                          84,195           --               --           --           84,195
Investment in Hospitality Properties Trust                   111,433           --               --           --          111,433
Cash and cash equivalents                                     21,678        (11,850)          (6,000)      33,305         37,133
Interest and rents receivable                                 20,419           --               --           --           20,419
Deferred interest and finance costs, net,                                                
  and other assets                                            27,463           --               --           --           27,463
                                                         -----------    -----------      -----------  -----------    ----------- 
                                                         $ 2,389,251    $    40,000      $   220,000  $    33,305    $ 2,682,556   
                                                         ===========    ===========      ===========  ===========    ===========
                                                                                         
              LIABILITIES AND SHAREHOLDERS' EQUITY                                       
                                                                                         
Bank notes payable                                       $   160,000    $    40,000      $   220,000  $  (420,000)   $      --
Senior notes payable, net                                    499,851           --               --           --          499,851
Mortgage notes payable                                        26,157           --               --           --           26,157
Convertible subordinated debentures                          209,818           --               --           --          209,818
Accounts payable and accrued expenses                         32,371           --               --           --           32,371
Deferred rents                                                33,448           --               --           --           33,448
Security deposits                                             17,818           --               --           --           17,818
Due to affiliates                                              7,141           --               --           --            7,141
Dividend payable                                              40,377           --               --           --           40,377
                                                                                         
Shareholders' equity:                                                                    
 Preferred shares of beneficial interest,                                                
  $.01 par value; 50,000,000 authorized; none issued            --             --               --           --             --
 Common shares of beneficial interest, $.01 par value;                                   
   125,000,000 and 150,000,000 shares authorized                                         
   and pro forma, 106,256,403 and 131,256,403 shares                                     
   issued and outstanding and pro forma                        1,063           --               --            250          1,313
 Additional paid-in capital                                1,512,767           --               --        453,055      1,965,822
 Cumulative net income                                       451,679           --               --           --          451,679
 Dividends                                                  (603,239)          --               --           --         (603,239)
                                                         -----------    -----------      -----------  -----------    -----------
   Total shareholders' equity                              1,362,270           --               --        453,305      1,815,575
                                                         -----------    -----------      -----------  -----------    -----------   
                                                         $ 2,389,251    $    40,000      $   220,000  $    33,305    $ 2,682,556
                                                         ===========    ===========      ===========  ===========    ===========
                                                                --             --               --           --             --

                                                                F-6
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
HEALTH AND RETIREMENT PROPERTIES TRUST 
Pro Forma Consolidated Statement of Income
For the Three Months Ended March 31, 1998 
(amounts in thousands, except per share data) 
(unaudited)

                                                                             1998
                                                                         First Quarter     1600 Market     Recent         
                                                            Historical   Acquisitions (D)  Street (E)   Acquisitions (D)  
                                                           -----------   ----------------  -----------  ----------------  
<S>                                                        <C>            <C>             <C>             <C>            
Revenues:
     Rental income                                           $ 66,894       $  2,455        $  4,721        $  1,854       
     Interest and other income                                  5,058           --              --              --         
                                                             --------       --------        --------        --------       
         Total revenues                                        71,952          2,455           4,721           1,854       
                                                             --------       --------        --------        --------       
                                                                                                                           
Expenses:                                                                                                                  
     Operating expenses                                        13,502            338           1,915             556       
     Interest                                                  13,651          1,028           1,869             650       
     Depreciation and amortization                             12,658            479             650             291       
     General and administrative                                 3,619            104             145              66       
                                                             --------       --------        --------        --------       
         Total expenses                                        43,430          1,949           4,579           1,563       
                                                             --------       --------        --------        --------       
                                                                                                                           
Income (loss) before equity in earnings of                                                                                 
     Hospitality Properties Trust                              28,522            506             142             291       
Equity in earnings of Hospitality Properties Trust              1,327           --              --              --         
Gain on equity transaction of Hospitality Properties Trust      1,532           --              --              --         
                                                             --------       --------        --------        --------       
                                                                                                                           
Income (loss) before extraordinary item                      $ 31,381       $    506        $    142        $    291       
                                                             ========       ========        ========        ========               
Weighted average shares outstanding                           101,471                                                      
                                                             ========                                                      
Basic and diluted earnings per common share:
Income before extraordinary item                             $   0.31                                                      
                                                             ========                                                      
                                                
<CAPTION>
                                                             1735 Market                   Proposed                     
                                                             Street (F)    Other (G)     Offering (H)   Pro Forma      
                                                             -----------  ------------   ------------  ------------   
<S>                                                           <C>           <C>           <C>          <C>
Revenues:                                                                        
     Rental income                                             $  7,483      $   --        $   --        $ 83,407         
     Interest and other income                                     --            --            --           5,058         
                                                               --------      --------      --------      --------         
         Total revenues                                           7,483          --            --          88,465         
                                                               --------      --------      --------      --------         
                                                                                                                          
Expenses:                                                                                                                 
     Operating expenses                                           2,459          --            --          18,770         
     Interest                                                     3,575        (1,291)       (6,825)       12,657         
     Depreciation and amortization                                1,271          --            --          15,349         
     General and administrative                                     283          --            --           4,217         
                                                               --------      --------      --------      --------         
         Total expenses                                           7,588        (1,291)       (6,825)       50,993         
                                                               --------      --------      --------      --------         
                                                                                                                          
Income (loss) before equity in earnings of                                                                                
     Hospitality Properties Trust                                  (105)        1,291         6,825        37,472         
Equity in earnings of Hospitality Properties Trust                 --            --            --           1,327         
Gain on equity transaction of Hospitality Properties Trust         --            --            --           1,532         
                                                               --------      --------      --------      --------         
                                                                                                                          
Income (loss) before extraordinary item                        $   (105)     $  1,291      $  6,825      $ 40,331         
                                                               ========      ========      ========      ========         
Weighted average shares outstanding                                                                       130,941         
                                                                                                         ========         
Basic and diluted earnings per common share:                                                                        
Income before extraordinary item                                                                         $   0.31         
                                                                                                         ========         
</TABLE>
                                                                 F-7
<PAGE>
<TABLE>
<CAPTION>
HEALTH AND RETIREMENT PROPERTIES TRUST
Pro Forma Consolidated Statement of  Income
For the Year Ended December 31, 1997
(amounts in thousands, except per share data)
(unaudited)
                                                                                                  Second Quarter     Third Quarter
                                                            Historical   GPI (I)     CSMC (J)    Acquisitions (K)   Acquisitions (K)
                                                            ----------  ---------   ---------    ----------------   ----------------
<S>                                                         <C>        <C>         <C>              <C>             <C>
Revenues:
     Rental income                                           $188,000   $ 11,959    $  6,831         $  2,948         $  3,179
     Interest and other income                                 20,863       (366)       --               --               --
                                                             --------   --------    --------         --------         --------
         Total revenues                                       208,863     11,593       6,831            2,948            3,179
                                                             --------   --------    --------         --------         --------
Expenses:                                                                                                            
     Operating expenses                                        26,765      2,053       1,910             --                954
     Interest                                                  36,766     (1,216)      3,232            1,087            1,463
     Depreciation and amortization                             39,330      4,156       1,119              627              501
     General and administrative                                11,670      2,105         249              139              111
                                                             --------   --------    --------         --------         --------
         Total expenses                                       114,531      7,098       6,510            1,853            3,029
                                                             --------   --------    --------         --------         --------
Income (loss) before equity in earnings of Hospitality                                                               
     Properties Trust, gain on sale of properties and                                                                
     extraordinary item                                        94,332      4,495         321            1,095              150
Equity in earnings of Hospitality Properties Trust              8,590       --          --               --               --
Gain on equity transaction of Hospitality Properties Trust      9,282       --          --               --               --
                                                             --------   --------    --------         --------         --------
Income (loss) before gain on sale of properties and                                                                  
     extraordinary item                                       112,204      4,495         321            1,095              150     
Gain on sale of properties, net                                 2,898       --          --               --               --
                                                             --------   --------    --------         --------         --------
Income (loss) before extraordinary item                      $115,102   $  4,495    $    321         $  1,095         $    150
                                                             ========   ========    ========         ========         ========
Weighted average shares outstanding                            92,168
                                                             ========
Basic and diluted earnings per common share:
Income (loss) before extraordinary item                      $   1.25
                                                             ========
<CAPTION>
                                                               West 34th   Franklin   Bridgepoint   Fourth Quarter       1998
                                                              Street (L)   Plaza (M)  Square (N)   Acquisitions(K)  Acquisitions (Q)
                                                              ---------- -----------  ----------- ----------------  ---------------
<S>                                                          <C>         <C>           <C>             <C>             <C>    
Revenues:
     Rental income                                             $ 10,771   $  9,614      $  5,599        $  8,461        $ 26,039
     Interest and other income                                     --         --            --              --              --
                                                               --------   --------      --------        --------        --------
         Total revenues                                          10,771      9,614         5,599           8,461          26,039
                                                               --------   --------      --------        --------        --------
Expenses:                                                                                                              
     Operating expenses                                           3,641      4,904         2,162           2,634           5,583
     Interest                                                     2,876      2,486         3,216           4,338           9,100
     Depreciation and amortization                                1,869      1,334         1,175           1,269           4,601
     General and administrative                                     415        296           262             283           1,024
                                                               --------   --------      --------        --------        --------
         Total expenses                                           8,801      9,020         6,815           8,524          20,308
                                                               --------   --------      --------        --------        --------
Income (loss) before equity in earnings of Hospitality                                                                 
     Properties Trust, gain on sale of properties and                                                                  
     extraordinary item                                           1,970        594        (1,216)            (63)          5,731
Equity in earnings of Hospitality Properties Trust                 --         --            --              --              --
Gain on equity transaction of Hospitality Properties Trust         --         --            --              --              --
                                                               --------   --------      --------        --------        --------
Income (loss) before gain on sale of properties and                                                                    
     extraordinary item                                           1,970        594        (1,216)            (63)          5,731   
Gain on sale of properties, net                                    --         --            --              --              --
                                                               --------   --------      --------        --------        --------
Income (loss) before extraordinary item                        $  1,970   $    594      $ (1,216)       $    (63)       $  5,731
                                                               ========   ========      ========        ========        ========
Weighted average shares outstanding                                                                                

Basic and diluted earnings per common share:
Income (loss) before extraordinary item                                                                    
                                                                                                          
<PAGE>
<CAPTION>
                                                           1600 Market   1735 Market                Proposed
                                                            Street (O)    Street (P)   Other (R)   Offering (S)   Pro Forma
                                                           ------------  ------------ ----------   ------------  ----------
<S>                                                        <C>          <C>          <C>           <C>          <C>    
Revenues:
     Rental income                                           $ 18,883     $ 29,836    $   --        $   --        $322,120
     Interest and other income                                   --           --          --            --          20,497     
                                                             --------     --------    --------      --------      --------
         Total revenues                                        18,883       29,836        --            --         342,617
                                                             --------     --------    --------      --------      --------
Expenses:                                                                                                        
     Operating expenses                                         7,659       10,276        --            --          68,541
     Interest                                                   7,475       14,300      (6,395)      (27,300)       51,428
     Depreciation and amortization                              2,601        5,085        --            --          63,667
     General and administrative                                   578        1,130        --            --          18,262
                                                             --------     --------    --------      --------      --------
         Total expenses                                        18,313       30,791      (6,395)      (27,300)      201,898
                                                             --------     --------    --------      --------      --------
Income (loss) before equity in earnings of Hospitality                                                           
     Properties Trust, gain on sale of properties and                                                            
     extraordinary item                                           570         (955)      6,395        27,300       140,719
Equity in earnings of Hospitality Properties Trust               --           --          --            --           8,590
Gain on equity transaction of Hospitality Properties Trust       --           --          --            --           9,282
                                                             --------     --------    --------      --------      --------
Income (loss) before gain on sale of properties and                                                              
     extraordinary item                                           570         (955)      6,395        27,300       158,591         
Gain on sale of properties, net                                  --           --          --            --           2,898
                                                             --------     --------    --------      --------      --------
Income (loss) before extraordinary item                      $    570     $   (955)   $  6,395      $ 27,300      $161,489
                                                             ========     ========    ========      ========      ========
Weighted average shares outstanding                                                                                130,725
                                                                                                                  ========
Basic and diluted earnings per common share:
Income (loss) before extraordinary item                                                                           $   1.24
                                                                                                                  ========
</TABLE>
                                                                 F-8

<PAGE>

                     HEALTH AND RETIREMENT PROPERTIES TRUST

         Notes To Unaudited Pro Forma Consolidated Financial Statements
                  (dollars in thousands, except per share data)

Consolidated Balance Sheet Adjustments

A.   Represents  the  Company's  acquisitions  in April 1998 and May 1998 of two
     commercial  office properties  located in  Massachusetts,  a medical office
     property  located in  California  and three  commercial  office  properties
     located in New Jersey (the "Recent Acquisitions").  These acquisitions were
     funded with available  cash and by drawings  under the Company's  revolving
     line of credit.

B.   Represents the Company's  acquisition on May 22, 1998 of a mortgage secured
     by a  commercial  office  property  located in  Philadelphia,  Pennsylvania
     ("1735 Market Street"). The Company has also entered into an agreement with
     the current owners of 1735 Market Street to acquire a controlling  interest
     in the property  subject to  definitive  agreements  and the  resolution of
     certain  issues.  The  acquisition is subject to various  conditions and no
     assurances  can  be  given  as to  when  or if  this  acquisition  will  be
     consummated.  In addition,  the  realization  on the collateral may involve
     foreclosure or other judicial proceedings. This acquisition was funded with
     available  cash and by  drawings  under  the  Company's  revolving  line of
     credit.

C.   Represents  the proposed  public  offering of  25,000,000  common shares of
     beneficial  interest of the Company ("Common  Shares") at a per share price
     of $19.1875 (the "Proposed Offering").  Net proceeds will be used, in part,
     to repay amounts outstanding under the Company's revolving line of credit.

Consolidated  Statement of Income  Adjustments  for the Quarter  Ended March 31,
1998

D.   Represents the increases in rental income, operating expenses, depreciation
     and amortization and general and  administrative  expenses arising from the
     Recent  Acquisitions  and 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,   "1998   First   Quarter
     Acquisitions"),  and the  increase in interest  expense from the use of the
     Company's revolving line of credit to fund these acquisitions.

E.   Represents the increase in rental income, operating expenses,  depreciation
     and amortization and general and  administrative  expenses arising from the
     Company's  acquisition  on March 30, 1998 of a commercial  office  property
     located at 1600 Market Street in Philadelphia,  Pennsylvania  ("1600 Market
     Street") and the increase in interest expense from the use of the Company's
     revolving line of credit to fund this acquisition.

F.   Represents the increase in rental income, operating expenses,  depreciation
     and amortization and general and  administrative  expenses arising from the
     Company's  acquisition  of 1735 Market  Street,  as well as the increase in
     interest expense from the use of the Company's  revolving line of credit to
     fund this acquisition.

G.   Represents the net decrease in interest expense relating to the issuance of
     additional  Remarketed  Reset  Notes  and  6.7%  Senior  Notes  due 2005 in
     February 1998 (collectively the "1998 Notes') and the issuance of 6,977,575
     common  shares in  February  1998 and March  1998;  the  proceeds  of these
     offerings  were used to repay  amounts then  outstanding  on the  Company's
     revolving credit facility.

H.   Reflects  the  decrease  in  interest  expense as a result of the  Proposed
     Offering and the application of the net proceeds to the Company's revolving
     line of credit.
                                       F-9
<PAGE>

                     HEALTH AND RETIREMENT PROPERTIES TRUST

         Notes To Unaudited Pro Forma Consolidated Financial Statements
                  (dollars in thousands, except per share data)

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

I.   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 common shares in a March 1997  offering,  the proceeds of which
     were used in part to repay  amounts  then  outstanding  under the  Company'
     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.

J.   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.

K.   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.

L.   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.

M.   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.

N.   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.

O.   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.

P.   Represents the increase in rental income, depreciation and amortization and
     general and administrative  expenses arising from the Company's acquisition
     of 1735 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-10
<PAGE>

                     HEALTH AND RETIREMENT PROPERTIES TRUST

         Notes To Unaudited Pro Forma Consolidated Financial Statements
                  (dollars in thousands, except per share data)

Consolidated  Statement of Income  Adjustments  for the Year Ended  December 31,
1997 - continued

Q.   Represents the increase in rental income, operating expenses,  depreciation
     and amortization and general and  administrative  expenses arising from the
     Company's  Recent  Acquisitions  and the 1998  First  Quarter  Acquisitions
     (collectively,  "1998  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.

R.   Represents the net decrease in interest expense relating to the issuance of
     Remarketed  Reset Notes in July 1997, the issuance of 6.75% Senior Notes in
     December 1997,  the issuance of the 1998 Notes,  the prepayment of Floating
     Rate  Senior  Notes in July  1997,  and the  issuance  of common  shares in
     February 1998 and March 1998.

S.   Reflects  the  decrease  in interest  expense as a result of the  Company's
     Proposed  Offering and the  application  of net  proceeds to the  Company's
     revolving line of credit.





                                      F-11

<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: May 26, 1998



                                                                     EXHIBIT 2.1

                               PURCHASE AGREEMENT

                                     between


                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                       and

                            BANQUE PARIBAS, AS AGENT




                           Dated as of April 29, 1998



<PAGE>

                                TABLE OF CONTENTS


ARTICLE 1  PURCHASE AND SALE................................................2
           Section 1.1.  Agreement to Purchase..............................2
           Section 1.2.  Purchase Price.....................................2
           Section 1.3.  Closing Documents and Deliveries...................3
           Section 1.4.  Purchaser's Default................................4
           Section 1.5.  Seller's Default...................................5
           Section 1.6.  Escrow Agent.......................................5
           Section 1.7.  Transfer and Recordation Taxes;
                             Responsibility for Recording...................5
           Section 1.8.  Closing Expenses...................................5
           Section 1.9.  Condition Precedent to Seller's
                             Obligations....................................6
           Section 1.10.  Conditions Precedent to Purchaser's
                             Obligations.  .................................6

ARTICLE 2  REPRESENTATIONS, WARRANTIES AND COVENANTS........................6
           Section 2.1.  Representations and Warranties of
                             Each Lender. ..................................6
           Section 2.2.  Representations and Warranties of
                             Purchaser. ....................................8

ARTICLE 3  MISCELLANEOUS...................................................10
           Section 3.1.  Notices...........................................10
           Section 3.2.  Inspection by Seller..............................11
           Section 3.3.  Meaning of Certain Terms..........................11
           Section 3.4.  Purchaser's Indemnification
                                     Covenants.............................11
           Section 3.5.  Broker............................................11
           Section 3.6.  Confidentiality; Publicity........................12
           Section 3.7.  Severability of Provisions........................13
           Section 3.8.  Further Assurances................................13
           Section 3.9.  Captions; Internal References;
                                     Exhibits..............................13
           Section 3.10. Successors and Assigns............................13
           Section 3.11. Governing Law.....................................13
           Section 3.12. Waiver of Trial by Jury...........................14
           Section 3.13. Execution in Counterpart..........................14
           Section 3.14. No Recording......................................14
           Section 3.15. Miscellaneous. ...................................14
           Section 3.16. Non-liability of Trustees. .......................14
           Section 3.17. Loan Administration And Certain
                             Other Matters During Executory
                             Period........................................14


                                        i

<PAGE>
         THIS PURCHASE AGREEMENT (this "Agreement"), dated as of April 29, 1998,
between BANQUE  PARIBAS,  a French banking  corporation,  acting through its New
York Branch,  as Agent (in such capacity,  "Agent") for a group of lenders (each
lender being, individually, a "Lender" and all Lenders being, collectively,  the
"Seller") set forth on Exhibit A, having an office at The Equitable  Tower,  787
Seventh Avenue,  New York, New York 10019, and HEALTH AND RETIREMENT  PROPERTIES
TRUST ("Purchaser"),  a Maryland real estate investment trust, having an address
at 400 Centre Street, Newton, MA 02158.

                              W I T N E S S E T H:

         WHEREAS,  Purchaser has agreed to purchase from Seller,  and Seller has
agreed to sell to  Purchaser,  that certain loan (the "Loan")  evidenced by that
certain  Construction Loan Mortgage Note (the "Note"),  dated May 25, 1998, made
by Nine Penn Center  Associates,  L.P.  ("Borrower"),  as borrower,  in favor of
Agent in the  original  principal  amount  of Two  Hundred  Eighty-Five  Million
Dollars ($285,000,000),  made pursuant to that Construction Loan Agreement among
Borrower,  Agent and Seller dated May 25, 1988 and amended by that certain First
Amendment to  Construction  Loan  Agreement  dated as of February 27, 1990 (such
agreement, as so amended, being the "Loan Agreement"),  and secured, among other
things,  by that certain  Construction  Loan Mortgage,  Assignment of Leases and
Rents and Security  Agreement  (the  "Mortgage")  made as of May 25, 1988 by and
among Borrower,  the Lenders,  and Agent;  including without limitation,  all of
Seller's right,  title and interest in (i) the Mortgage,  covering  certain real
property  located  at  Nine  Penn  Center,  Philadelphia,  Pennsylvania  and the
building and other improvements situated thereon  (collectively,  the "Mortgaged
Property"),  the land on which the same is  situated  (the  "Land")  being  more
particularly  described in Exhibit B; (ii) that certain Assignment of Leases and
Rents dated as of May 25, 1988 (the "Assignment of Leases"), made by Borrower in
favor of Seller;  (iii) that certain Guarantee of Interest,  Taxes and Operating
Expenses, made as of May 25, 1988, given by The Equitable Life Assurance Society
of the United  States  ("Equitable")  and Ronald Rubin  ("Rubin";  Equitable and
Rubin,  being,  collectively,  the  "Guarantors") in favor of Seller;  (iv) that
certain  Guarantee of Completion and Performance  made as of May 25, 1988, given
by the Guarantors in favor of Seller;  (v) that certain Security  Agreement made
as of May 25, 1988 between Borrower and Seller;  and (vi) that certain Servicing
Agreement (the "Servicing  Agreement")  made as of May 25, 1998 between Borrower
and Agent (the documents  described in items (i)-(vi) above,  collectively,  the
"Loan Documents").

         NOW  THEREFORE,  in  consideration  of  the  premises  and  the  mutual
agreements hereinafter set forth, the receipt and sufficiency of which is hereby
acknowledged by the parties, the parties hereto agree as follows:


<PAGE>

                                    ARTICLE 1

                                PURCHASE AND SALE

         Section 1.1.  Agreement to Purchase.

                  (a) Seller agrees to sell,  and Purchaser  agrees to purchase,
all of Seller's right,  title and interest in and to, each of the Loan Documents
(said right, title and interest being, hereinafter, the "Asset").

                  (b) The  closing  for the  purchase  and sale (the  "Closing")
shall take place at the offices of Carb,  Luria,  Cook & Kufeld LLP at 521 Fifth
Avenue, Ninth Floor, New York, New York at 10:00 a.m. on the second business day
(the "Closing Date")  following the giving of the Acceptance  Notice (as defined
in Section 1.9),  time being of the essence with respect to the  obligations  of
Purchaser. Seller shall have the right to adjourn the Closing for up to five (5)
business days by giving  written notice thereof to Purchaser not less than three
(3) business days prior to the Closing Date. Seller shall also have the right to
adjourn the Closing for up to two (2)  business  days by giving  written  notice
thereof to Purchaser at closing;  provided that, in such event,  notwithstanding
anything to the contrary  contained herein,  all interest accrued on the Deposit
shall be paid to Purchaser at Closing;  provided,  however, that (x) in no event
shall the aggregate  extensions  hereunder exceed five (5) business days and (y)
in no event shall the Closing occur later than May 24, 1998.

                  (c) The Escrow Agent shall hold this  Agreement  until receipt
of the Deposit,  whereupon,  Escrow Agent shall deliver this  Agreement to Agent
and  Purchaser.  In the event the  Deposit  shall not have been  received by the
Escrow Agent as provided below, this Agreement shall automatically terminate and
be null  and void and of no  further  effect,  except  that any  portion  of the
Deposit received by Escrow Agent shall be paid to Seller.

         Section 1.2.  Purchase Price.

                  (a) The purchase  price for the Asset (the  "Purchase  Price")
shall be Two Hundred  Twenty-Six Million Dollars  ($226,000,000),  to be paid as
follows:

                      (i) A  deposit  in the  amount  of  Five  Million  Dollars
         ($5,000,000)  will be paid by  Purchaser  by the wiring of  immediately
         available  funds to an  account  designated  by the  Escrow  Agent  (as
         defined in Section 1.6) on April 29, 1998.

                      (ii) An  additional  deposit  (such amount and the deposit
         paid  pursuant  to clause (i) above,  the  "Deposit")  in the amount of
         Seventeen  Million Six Hundred Thousand Dollars  ($17,600,000)  will be
         paid by Purchaser by the wiring of  immediately  available  funds to an
         account designated by the Escrow Agent on April 30, 1998.


                                        2
<PAGE>
                      (iii) On the Closing Date,  Purchaser will pay the balance
         of the Purchase Price (i.e.,  $203,400,000)  in  immediately  available
         funds to Agent in accordance with wiring instructions to be provided by
         Agent.

                  (b) Except for any  prepayments  of  principal,  the aggregate
amount of which shall be credited against the Purchase Price,  there shall be no
adjustments  to the  Purchase  Price,  it being  understood  and agreed that all
amounts  (other than payments of principal)  collected  with respect to the Loan
prior to the Closing Date shall be retained by Seller and all amounts  collected
with respect to the Loan on and after the Closing Date shall be paid over to and
retained by Purchaser; provided, however, that (x) any interest payment received
prior to maturity of the Loan shall be prorated between Purchaser and Seller and
(y) if Purchaser  shall,  at any time,  during the period expiring two (2) years
after the Closing  Date,  collect  interest  payments  expressly  designated  as
attributable  to periods  prior to maturity,  such  interest  payments  shall be
prorated between Purchaser and Seller.

         Section 1.3.  Closing Documents and Deliveries.

                  (a) On the Closing  Date,  the  following  documents  shall be
executed and delivered by the parties as stated below:

                      (i) Seller shall  deliver to Purchaser  the original  Note
         together  with an assignment of the Note to Purchaser by allonge in the
         form of Exhibit C;

                      (ii)  An  assignment   and   assumption   agreement   (the
         "Assignment")  in recordable form, in the form of Exhibit D, containing
         an  assignment  by Seller to  Purchaser  of Seller's  right,  title and
         interest  under  the  Loan  Documents  (other  than  the  Note  and the
         Servicing  Agreement) and an assumption by Purchaser of the obligations
         of Seller's  arising and accruing under those  agreements and under the
         Note on and after the Closing Date;

                      (iii) An assignment and  assumption  agreement in the form
         of  Exhibit E  containing  an  assignment  of Agent's  rights,  if any,
         thereafter arising or accruing pursuant to the Servicing Agreement, and
         an  assumption  by Purchaser of the  obligations  of Agent  arising and
         accruing under the Servicing Agreement on and after the Closing Date;

                      (iv)  UCC-3  Financing  Statements  signed by Seller or by
         Agent as agent for Seller giving notice of the  assignment by Seller to
         Purchaser with respect to each of the three (3) presently  existing UCC
         Financing Statements on file with respect to the Loan;

                      (v) A certificate (the "Lender Certificate"),  dated as of
         the  Closing  Date,  from each  Lender in the form of  Exhibit F, and a
         certificate from Agent (the "Agent Certificate") from Agent in the form
         of Exhibit G;

                                        3
<PAGE>

                      (vi) A letter from Agent to Borrower notifying Borrower of
         the sale and  assignment  of the Loan pursuant to this  Agreement,  the
         name and address of  Purchaser  and the  assignment  of Agent's  rights
         under the Servicing Agreement to Purchaser; and

                      (vii)  Such  letters,   affidavits   and   indemnities  as
         Purchaser's  title  companies  may  reasonably  require as a  condition
         precedent to insuring Purchaser's interest with respect to the Loan and
         which are customary in a transaction of this nature.

                  (b) At Closing,  the following documents shall be delivered by
Seller to Purchaser to the extent not previously delivered:

                      (i) If in the possession of Seller, an ink signed original
         of each Loan  Document,  and a photocopy of any Loan Document for which
         an original is not in Seller's possession;

                      (ii) If in the possession of Seller,  an original (copy if
         original is not available) of the title  insurance  policy insuring the
         Loan issued by Chicago  Title  Insurance  Company and all  endorsements
         thereto, and all reinsurance  agreements  pertaining thereto,  together
         with a non-recourse assignment of said policy;

                      (iii) If in the possession of Seller,  the survey, if any,
         referred to in the above referenced title insurance  commitment made in
         connection with origination of the Loan (original if available); and

                      (iv) If in the  possession of Seller,  copies of the UCC-1
         financing  statements  filed in favor of  Seller  as  secured  party in
         connection  with the Loan and any related  continuation  statements  or
         subsequent UCC-1 financing statements filed in connection therewith.

         Section  1.4.  Purchaser's  Default.  In  the  event  of a  default  by
Purchaser  under  this  Agreement,  the  Deposit  shall  be  paid to  Seller  as
liquidated damages and shall constitute  Seller's sole and exclusive remedy with
regard to any such default,  either at law or in equity. The parties acknowledge
that it would be difficult to ascertain actual damages in the event of a default
by  Purchaser in its  obligations  to close  hereunder  and agree that they have
determined  that the Deposit  constitutes a fair and reasonable  estimate of the
amount of such damages.  Upon Seller's  exercise of such remedy,  this Agreement
shall be of no  further  force and  effect  and no party  hereto  shall have any
further rights or  obligations  hereunder or any claims against the other at law
or in equity,  without the need to execute any general  releases in favor of any
party.

                                        4
<PAGE>
         Section 1.5. Seller's Default.  The parties hereby agree that if Seller
defaults  hereunder,  Purchaser's  sole and  exclusive  remedy shall be to elect
within  ten  (10)  business  days  thereafter,  either  (i)  to  terminate  this
Agreement, in which event the Deposit shall be refunded to Purchaser, or (ii) to
institute an action for specific performance.

         Section 1.6. Escrow Agent. The law firm of Carb,  Luria,  Cook & Kufeld
LLP shall act as escrow agent (the "Escrow Agent")  hereunder.  The Escrow Agent
will hold the Deposit in an  interest-bearing  account pursuant to the terms and
provisions of that certain escrow agreement,  dated as of the date hereof, among
Purchaser,  Seller and Escrow Agent.  In the event of any dispute  regarding the
Deposit, the Escrow Agent shall have the right to pay the Deposit into a federal
or state court and, upon doing so, will have no further liability  regarding its
role as Escrow  Agent.  In the event the Closing  shall not occur,  interest and
income on the Deposit,  if any,  shall be paid to the party  entitled to receive
the Deposit. If the Closing shall occur,  interest on the Deposit, if any, shall
be paid to Seller and shall not be credited against the Purchase Price.

         Purchaser  acknowledges  that the Escrow  Agent is acting as counsel to
Seller in  connection  with the  transaction  herein and agrees  that the Escrow
Agent may  represent  Seller,  adversely to Purchaser,  in  connection  with any
disputes  hereunder,   including,   without  limitation,   disputes  arising  in
connection with the Deposit.

         Section  1.7.  Transfer  and  Recordation  Taxes;   Responsibility  for
Recording.  Purchaser  shall be  responsible  for,  and  shall  pay when due and
payable,  all transfer,  filing and recording  fees and taxes,  and any state or
county documentary taxes, if any, with respect to the filing or recording of any
document or  instrument  contemplated  hereby if Purchaser  elects to record the
same.  Purchaser  shall bear sole  responsibility  for recording all  mortgages,
assignments,  instruments  or other  documents  delivered  to  Purchaser  at the
Closing or thereafter.  Purchaser shall indemnify, save and keep Seller, and its
successor  and  assigns,  harmless  against  and from  any and all  liabilities,
demands,  claims,  actions  or causes of  action,  assessments,  losses,  fines,
penalties, costs, damages and expenses, including without limitation, reasonable
attorneys  fees and  disbursements,  sustained  or  incurred  by  Seller  or its
successors and assigns,  as a result of or arising out of Purchaser's failure to
pay such fees or taxes.

         Section  1.8.  Closing  Expenses.  Purchaser  and Seller  shall each be
responsible  for the payment of its own  closing  expenses  and its  expenses in
negotiating  and carrying out its obligations  under this Agreement,  including,
without limitation,  the costs of its counsel, and in the case of Purchaser, all
of the costs of title insurance, if required by Purchaser,  and all of the other
expenses of Purchaser set forth in Section 1.7, or otherwise.


                                        5
<PAGE>

         Section  1.9.  Condition  Precedent  to  Seller's   Obligations.   This
Agreement  and the  obligations  of Seller  hereunder are  conditioned  in their
entirety upon approval of this Agreement by each of the Lenders on or before May
14, 1998.  Agent shall give written  notice to Purchaser of the approval of this
Agreement by the Lenders (the "Acceptance  Notice") or its failure to obtain the
same prior to expiration of such period. If Agent shall fail to give such notice
within such period, this Agreement shall be deemed  disapproved.  If Agent shall
fail to give the  Acceptance  Notice or any notice of  disapproval  within  such
period,  the Deposit shall be returned to Purchaser,  whereupon,  this Agreement
shall be of no further force or effect and neither  Seller nor  Purchaser  shall
have any further rights or obligations  within respect to the other hereunder or
any claims  against  the other at law or in equity  without  the need to execute
general releases or any other writing in favor of such other party.

         Section 1.10.  Conditions  Precedent to  Purchaser's  Obligations.  The
obligations of Purchaser  hereunder are also conditioned upon (i) the assignment
of the Asset by Seller to Purchaser as of the Closing Date free and clear of any
liens  with  respect  to  Seller's  interest  in and to the  Asset  and (ii) the
representations and warranties of Seller contained in each Lender's  Certificate
and Agent's  Certificate  being true and correct in all material  respects as of
the Closing Date.  If either  condition is not satisfied as of the Closing Date,
unless the same shall be waived in writing by Purchaser on or before the Closing
Date,  the Deposit  shall be returned to  Purchaser.  Upon such  delivery of the
Deposit to Purchaser,  this Agreement shall be of no further force or effect and
neither Seller nor Purchaser  shall have any further rights or obligations  with
respect  to the other  hereunder  or any claims  against  the other at law or in
equity,  without the need to execute  general  releases or any other  writing in
favor of such other  party.  If  Purchaser  shall  waive any such  condition  to
Closing, there shall be no abatement in the Purchase Price and Seller shall have
no  liability  whatsoever  to  Purchaser  with  respect  thereto  either  at  or
subsequent to Closing.

                                    ARTICLE 2

                    REPRESENTATIONS, WARRANTIES AND COVENANTS

         Section 2.1.  Representations  and Warranties of Each Lender. As of the
Closing,  and  subject  to the  approval  of this  Agreement  by the  Lenders as
provided  in  Section  1.9,  each  Lender  severally  shall  make the  following
representations and warranties to Purchaser, as of the Closing Date:

                  (a) Such Lender has full and  corporate  power,  authority and
legal right to sell,  assign and transfer its interest in the Asset to Purchaser
and to execute and  deliver,  engage in the  transactions  contemplated  by, and
perform and observe the terms and conditions of this  Agreement,  the Assignment
and any certificates delivered by such Lender pursuant to this Agreement.

                                        6
<PAGE>

                  (b) Such Lender has duly and validly authorized,  executed and
delivered  each of the  following  documents  to  which it is a  signatory:  the
Assignment and the Lender's Certificate.

                  (c) Such Lender has the full  right,  power and  authority  to
transfer its interest in the Loan,  free of any liens or  encumbrances  thereon,
and without the need for any consent to such  transfer,  except such consents as
it has heretofore  received and such Lender's interest in the Loan is accurately
set forth in Exhibit A.

                  (d) Such Lender knows of no amendment or  modification  to any
of the Loan  Documents,  or of any other  agreement  which  may have a  material
effect  upon the rights and  obligations  of the  parties  pursuant  to the Loan
Documents.

                  (e) As of the Closing Date, the outstanding  principal  amount
due with respect to such  Lender's  interest in the Loan is amount set forth for
such Lender on Exhibit A.

         Agent further represents and warrants as follows:

                  (a) That, as of the Closing Date, there are no escrow accounts
held by Seller pursuant to the terms of the Loan Documents.

                  (b) As of the  date of  this  Agreement  and for the two  year
period  preceding  the date  hereof,  Agent has  received  no written  notice of
default by Agent or the Lenders under the Loan Documents.

                  (c)  Agent  has  duly and  validly  authorized,  executed  and
delivered  the  Allonge,   the  Agent's  Certificate  and  the  UCC-3  Financing
Statements.

         Except as set forth in this Section 2.1 and Section  3.5,  Seller makes
no other  representations,  warranties or covenants to Purchaser with respect to
the Asset.

         It is  expressly  agreed  that  neither  Agent nor any Lender  shall be
responsible  for  the  accuracy  of any  representations  or  warranties  or the
performance  of any  covenants of any other Lender under any  provisions of this
Agreement  or  under  any  documents  delivered  at  Closing  pursuant  to  this
Agreement, each Lender being solely and severally liable to Purchase for its own
warranties,  representations  and  covenants.  It is agreed that Agent may,  but
shall not be obligated to make any such warranties or  representation  on behalf
of any  Lender(s),  or to perform any such covenants on behalf of any Lender(s),
provided that Agent shall expressly acknowledge that it is taking such action on
behalf of such Lender(s).  Purchaser agrees that, in any such event, Agent shall
have  no  liability  to  Purchaser  with  respect  thereto,  except  if  Agent's
representation  that it was so  authorized  to take such action shall be untrue,
Purchaser having recourse against the representing Lender as to the substance of
the applicable

                                        7
<PAGE>
certificate.  All  representations  and warranties made by the Lenders and Agent
pursuant to any certificates  shall survive only for the period set forth in the
applicable certificates, and thereafter shall be null and void and of no further
force and effect.

         Section 2.2.  Representations  and  Warranties of Purchaser.  Purchaser
hereby  represents and warrants to Seller,  each of which is true and correct as
of the date hereof and as of the Closing Date, as follows:

                  (a) Purchaser is duly organized,  validly existing and in good
standing under the laws of the State of Maryland.

                  (b) Purchaser has the full power and authority to purchase the
Asset and to execute,  deliver and perform, and to enter into and consummate all
the  transactions  contemplated  by this  Agreement,  has  duly  authorized  the
execution,  delivery and  performance of this  Agreement,  has duly executed and
delivered this Agreement.

                  (c) Purchaser expressly acknowledges that, except as otherwise
specifically  set forth in this  Agreement,  neither  Seller,  nor any  officer,
director,  employee,  agent,  representative,   accountant,  advisor,  attorney,
consultant  or  contractor  of  any  of  them  has  made  any  oral  or  written
representations or warranties, whether expressed or implied, by operation of law
or  otherwise,  with  respect  to the  Mortgaged  Property  or the  Asset or the
existence of any  litigation  with respect  thereto,  the zoning and other laws,
regulations  and rules  applicable  thereto or the  compliance  by the Mortgaged
Property  therewith,  the revenues and expenses  generated by or associated with
the Mortgaged  Property,  or any due diligence  materials,  or any statements or
information contained in connection with the Asset or related thereto. Purchaser
further  acknowledges that all materials  relating to the Mortgaged Property and
the Asset  which have been  provided by Seller  have been  provided  without any
warranty  or   representation,   expressed  or  implied  as  to  their  content,
suitability  for  any  purpose,  accuracy,   truthfulness  or  completeness  and
Purchaser shall not have any recourse against Seller, or its counsel,  advisors,
agents, officers,  directors or employees or the preparers of any information in
the event of any errors therein or omissions  therefrom.  Purchaser is acquiring
the Asset based solely on its own  independent  investigation  and inspection of
the  Mortgaged  Property  and the Asset  (and  such  other  due  diligence  that
Purchaser and Purchaser's  counsel have deemed necessary) and not in reliance on
any information (whether written,  oral or  otherwise)provided by Seller, or any
of its officers,  directors,  employees, agents,  representatives,  accountants,
advisors,  attorneys,  consultants  or  contractors,  except for the matters set
forth in each Lender's Certificate and Agent's Certificate.

                  (d)  Purchaser  acknowledges  that  Seller  does  not  own the
Property and,  accordingly,  is making no  representations  or  warranties  with
respect to the Mortgaged Property. Purchaser

                                        8
<PAGE>

acknowledges and agrees that,  except for the matters set forth in each Lender's
Certificate and Agent's  Certificate,  Purchaser is purchasing the Asset "AS IS"
and "WITH ALL  FAULTS,"  based  upon the  status of the Asset as of the  Closing
Date. In amplification,  and not in limitation of the foregoing, Seller does not
and will not make any oral or written representations, warranties, promises or

                  (e)  guarantees   whatsoever,   whether  express  or  implied,
concerning  or  with  regard  to,  and  expressly  disclaims  any  liability  or
obligation with respect to, concerning or relating to, any of the following:

                    (i) the collectability of the Loan;

                    (ii) the value or condition of the Mortgaged Property;

                    (iii) title or ownership to or of the Mortgaged  Property or
               any  portion  or  part  thereof  or any  materials,  fixtures  or
               furnishings located therein or thereon;

                    (iv)   Borrower's    compliance   with   any   environmental
               protection, pollution or land use laws;

                    (v) the zoning and any other restrictions  applicable to the
               Mortgaged Property;

                    (vi)  ownership  of or  obligations  in  respect  of any air
               rights, zoning bonuses,  floor area ratio bonuses or entitlements
               or other similar rights or benefits attributable to, burdening or
               otherwise pertaining to the Mortgaged Property;

                    (vii)  claims by Borrower or any  Guarantor  against  Seller
               under the Loan  Documents or otherwise or claims by third parties
               against  Borrower or any  Guarantor or the credit  worthiness  or
               ability of Borrower to fulfill its respective  obligations or pay
               its respective debts as they mature;

                    (viii) pending, existing or projected approvals, commitments
               or guarantees  concerning or relating to, or rights of or from or
               claims   against   or   relating   to,   any    governmental   or
               quasi-governmental  entity  regarding,  assurances of assistance,
               compliance  with  programs or benefits,  real estate  taxes,  tax
               reductions or benefits;

                    (ix)  the  existence,   validity,   enforceability,   terms,
               conditions  or any  other  aspect  of the  leases  affecting  the
               Property; or

                    (x) any other matter, fact or circumstance whatsoever.

                  (f)   Purchaser   expressly   acknowledges   that   it   is  a
sophisticated  investor and has been  represented  by and relied upon counsel in
connection with this Agreement and the transactions

                                        9
<PAGE>

contemplated  herein.  Purchaser is acquiring  the Asset for its own account and
not as an agent or nominee on behalf of others.

                  (g)  Purchaser  acknowledges  that (x) the Note and other Loan
Documents are being assigned to Purchaser without recourse to Seller for amounts
payable thereunder and (y) each Lender's and Agent's liability  hereunder and in
connection with the transaction  contemplated hereby shall be limited to matters
arising in connection with breach of representation.

                  (h) On the Closing Date, Purchaser covenants and agrees to and
does hereby release Seller's attorneys and the Broker from all claims,  actions,
suits or  proceedings  relating to this  Agreement  and in  connection  with the
transaction  contemplated  hereby  other  than  those  arising  from  the  gross
negligence or willful misconduct of the released party.

                  (i) Purchaser  acknowledges that it is aware that Section 5.15
of the Mortgage contains, among other things, a provision to the effect that the
mortgagee  will not  become a "party in  interest"  (within  the  meaning of the
Employee Retirement Income Security Act of 1974, as now or hereafter amended) to
any pension or profit sharing plan which at any time has assets allocated to the
Prime Property Fund of Equitable and prohibiting the sale conveyance or transfer
of the Mortgage to a person or entity which would be such a "party in interest."

         Purchaser  represents and warrants to Seller and Agent that the sale of
the  Assets  to  Purchaser  pursuant  to this  Agreement  will not  result  in a
violation of the provisions of said Section 5.15 of the Mortgage.

                                    ARTICLE 3

                                  MISCELLANEOUS

         Section 3.1. Notices. All demands, notices and communications hereunder
shall be in writing and given by personal delivery, recognized overnight courier
or transmitted by telecopy, if to Seller,  addressed to Banque Paribas, New York
Branch,  The Equitable  Tower,  787 Seventh  Avenue,  New York,  New York 10019,
Attention:  William A. Wexler,  Director,  Fax number (212) 841-3565,  Telephone
number (212) 841-3306,  with a copy sent by like manner to Carb,  Luria,  Cook &
Kufeld LLP,  521 Fifth  Avenue,  New York,  New York 10175,  Attention:  Kenneth
Richter, Esq., Fax number (212) 682-2682, Telephone number (212) 503-0662, or to
such other address as Seller may  designate in writing to  Purchaser;  and if to
Purchaser,  addressed  to Health and  Retirement  Properties  Trust,  400 Centre
Street,  Newton,  MA 02158,  Attention:  Mr. David J. Hegarty,  Fax number (617)
332-2261,  Telephone  number (617) 332-3390,  with a copy sent by like manner to
Sullivan & Worcester LLP, One Post Office Square,  Boston, MA 02109,  Attention:
Jennifer B. Clark,  Esq.,  Fax number  (617)  338-2880,  Telephone  number (617)
338-2406,  or to such other  address as  Purchaser  may  designate in writing to
Seller. A copy of any notices given by telecopy shall also be sent by

                                       10
<PAGE>

recognized  overnight  courier.  Notices  shall be deemed  given upon receipt or
refusal thereof.

         Section 3.2.  Inspection by Seller.  Seller shall be entitled to retain
copies of the Loan  Documents  for its file.  After the transfer of documents or
files to Purchaser  pursuant to the terms of this  Agreement,  Purchaser  agrees
that  Seller,  at  Seller's  expense,  shall have the  continuing  right to use,
inspect, and make extracts from or copies of any such documents or records, upon
reasonable  notice to Purchaser at the place where such documents are maintained
by Purchaser.  Purchaser further agrees to allow Seller, at Seller's expense, to
review original  documents for any lawful purpose and upon reasonable  terms and
conditions  and upon  reasonable  notice to  Purchaser.  The  provisions of this
Section 3.2 shall survive the Closing.

         Section  3.3.  Meaning  of  Certain  Terms.  (a) The  use of the  terms
"herein," "hereunder," and "hereof" and terms of like import shall refer to this
Agreement in its entirety and not to any  particular  Article,  Section or other
subdivision of this Agreement unless indicated to the contrary.

                  (b) The term  "business  day"  shall mean any day on which the
New York Stock Exchange is open for business.

         Section 3.4.  Purchaser's  Indemnification  Covenants.  Purchaser shall
indemnify,  save and keep  Seller and Agent,  and its  successors  and  assigns,
harmless against and from all liabilities, demands, claims, actions or causes of
action,  assessments,  losses,  fines,  penalties,  costs,  damages and expenses
(including,  without limitation,  reasonable  attorneys' fees and disbursements)
sustained or incurred by Seller or Agent or its  successors  and  assigns,  as a
result of or arising out of or by virtue of:

                      (a)  The inaccuracy of any representation or warranty
made by Purchaser to Seller herein;

                      (b)  The breach by Purchaser of any of the covenants
of this Agreement to be performed by it; and

                      (c)  The breach by Purchaser of any of the obligations
under the Loan Documents assumed by Purchaser.

The  provisions  of  this  Section  shall  survive  the  Closing  or  any  other
termination of this Agreement.

         Section 3.5. Broker. Purchaser,  Agent and each Lender severally hereby
warrants and  represents  to the others that it has not dealt with any broker in
connection with this transaction except LaSalle Partners Corporate and Financial
Services,  Inc. (the "Broker").  Seller is responsible for any fee due to Broker
with respect to the  transactions  contemplated in this Agreement  pursuant to a
separate written agreement.  Further, each of Purchaser,  Agent and each Lender,
severally (each of the foregoing,  in such capacity,  the "Indemnifying Party"),
agrees to indemnify and

                                       11
<PAGE>

hold  harmless  the  others  from  any  loss,  cost or  expense  which  any such
non-indemnifying party or parties may incur as a result of any inaccuracy in the
Indemnifying  Party's  warranties and  representations as set forth in the prior
sentence.  Notwithstanding anything to the contrary set forth in this Agreement,
the  provisions  of this  Section  3.5 shall  survive  the  Closing or any other
termination of this Agreement or voidance of this Agreement.

         Section 3.6.  Confidentiality; Publicity.

                  (a) As  used  in this  Agreement,  "Confidential  Information"
shall  mean  any  of  the  terms  and  conditions  of  this  Agreement  and  the
transactions  contemplated thereby. During the term of this Agreement, and for a
period  ending at the first to occur of (i) Closing,  or (ii) one year after the
end of the term of this Agreement by any other means,  Purchaser shall treat any
Confidential  Information  disclosed  by or  otherwise  obtained  from Seller or
Seller's  affiliates  under  this  Agreement  or  in  connection   therewith  as
confidential and proprietary and Purchaser shall not disclose such  Confidential
Information to any third party (other than its consultants and counsel who shall
be instructed to preserve such  confidentiality).  Purchaser  shall use the same
care to keep Confidential Information confidential as Purchaser uses to preserve
the confidentiality of its own confidential  information having a high degree of
competitive  significance and shall take appropriate measures to ensure that its
employees are bound to the same degree that  Purchaser is under this  Agreement.
This  obligation  of   confidentiality   does  not  apply  to  any  Confidential
Information  which:  (i) is  already  known  to  Purchaser,  (ii) is or  becomes
publicly known,  (iii) is lawfully obtained by Purchaser from a third party on a
non-confidential   basis,  (iv)  if  and  to  the  extent  that  a  judicial  or
governmental  authority  having  jurisdiction  over Purchaser orders or requires
disclosure,  or (v), if and to the extent,  is disclosed in documents  which are
recorded and evidence the transfer and  assignment  of the Loan or are submitted
to a judicial or governmental  authority having  jurisdiction  over Purchaser in
compliance  with  any  applicable  laws,  rules  or  regulations  pertaining  to
Purchaser. The provisions of this Section shall survive the Closing or any other
termination of this Agreement.

                  (b) The parties  agree that no party  shall,  with  respect to
this  Agreement  and the  transactions  contemplated  hereby,  make  any  public
pronouncements  or issue any  press  release  regarding  this  Agreement  or the
transactions  contemplated  hereby without the consent of the other party, which
consent shall not be unreasonably  withheld,  delayed or conditioned;  provided,
however,  that Purchaser  acknowledges  that no press release or other publicity
shall refer by name to Agent or any of the Lenders  without the express  written
consent of Agent or such Lender,  as the case may be. Seller  acknowledges  that
Purchaser's shares are publicly traded on the New York Stock Exchange.


                                       12
<PAGE>
         Section  3.7.   Severability  of  Provisions.   Any  part,   provision,
representation,  warranty or covenant of this  Agreement  which is prohibited or
which is held to be void or unenforceable  shall be ineffective to the extent of
such  prohibition  or  unenforceability   without   invalidating  the  remaining
provisions hereof. Any part, provision, representation,  warranty or covenant of
this  Agreement  which is prohibited or  unenforceable  or is held to be void or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability  without  invalidating the
remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction as to the Asset shall not invalidate or render  unenforceable  such
provision in any other jurisdiction.  To the extent permitted by applicable law,
the parties hereto waive any provision of law which prohibits or renders void or
unenforceable any provision hereof.

         Section  3.8.  Further  Assurances.  Seller  agrees,  at no  expense to
Seller,  to  execute  and  deliver  such  instruments  and take such  actions as
Purchaser may reasonably request in order to effectuate the purpose and to carry
out the terms of this Agreement,  provided that the same are consistent with the
non-recourse, "as is" nature of the transaction and, except as set forth in each
Lender's Certificate and the Agent's Certificate, the absence of representations
or warranties on behalf of Seller and Agent.

         Section 3.9.  Captions;  Internal  References;  Exhibits.  The Article,
Section and Exhibit headings herein are for convenience only and shall not limit
or otherwise affect the construction hereof.  References to Articles,  Sections,
Subsections,  Exhibits  or  other  subdivisions  contained  herein  are  to  the
respective Articles,  Sections,  Subsections,  Exhibits or other subdivisions of
the Agreement  unless stated to the contrary.  All Exhibits  annexed  hereto are
made a part hereof.

         Section 3.10. Successors and Assigns. This Agreement shall inure to the
benefit  of  and be  binding  upon  the  parties  hereto  and  their  respective
successors and assigns.  Except as expressly permitted by the terms hereof, this
Agreement cannot be assigned,  pledged or hypothecated by any Purchaser  without
the written consent of the Agent;  provided,  however, that Purchaser may assign
its rights under this Agreement to any affiliate of Purchaser, provided that (i)
no such assignment shall relieve Purchaser of its obligations hereunder or under
the  instruments  contemplated  to be  executed  by  Purchaser  pursuant to this
Agreement including,  without limitation, the Assignment, (ii) as a condition to
such  assignment,  the assignee shall assume all of the obligations of Purchaser
hereunder,  by a  writing  reasonably  acceptable  to  Agent,  and (iii) no such
assignment shall be effective,  and the assignee shall have no rights hereunder,
unless and until a copy of said written  agreement,  duly  executed by Purchaser
and the assignee, shall have been delivered to Agent.

         Section  3.11.  Governing  Law.  THIS  AGREEMENT  SHALL BE CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,

                                       13
<PAGE>

WITHOUT REGARD TO THE CHOICE OF LAW RULES THEREOF,  AND THE OBLIGATIONS,  RIGHTS
AND REMEDIES OF THE PARTIES  HEREUNDER  SHALL BE DETERMINED  IN ACCORDANCE  WITH
SUCH  LAWS.  The  parties  acknowledge  that this  Agreement  was  prepared  and
negotiated in New York,  that the Agent is located in New York, that the closing
is to occur in New York and that there is a  substantial  nexus with  respect to
this Agreement to the State of New York.

         Section 3.12. Waiver of Trial by Jury. PURCHASER AND SELLER EACH HEREBY
KNOWINGLY,  VOLUNTARILY  AND  INTENTIONALLY  WAIVE (TO THE EXTENT  PERMITTED  BY
APPLICABLE  LAW) ANY  RIGHT  EITHER  MAY HAVE TO A TRIAL BY JURY OF ANY  DISPUTE
ARISING UNDER OR RELATING TO THIS AGREEMENT.

         Section 3.13. Execution in Counterpart.  This Agreement may be executed
in any number of  counterparts,  each of which so executed shall be deemed to be
an original, but all such counterparts shall together constitute but one and the
same instrument.

         Section 3.14. No Recording.  Neither this  Agreement nor any memorandum
hereof  shall be recorded by  Purchaser.  Any  violation  by  Purchaser  of this
section shall be deemed a material breach by Purchaser of its obligations  under
this Agreement.

         Section  3.15.  Miscellaneous.  This  Agreement  supersedes  all  prior
Agreements and  understandings  relating to the subject  matter hereof.  Neither
this  Agreement  nor any term  hereof  may be  changed,  waived,  discharged  or
terminated  orally,  but only by an  instrument  in writing  signed by the party
against whom  enforcement  of the change,  waiver,  discharge or  termination is
sought.

         Section 3.16.  Non-liability  of Trustees.  The Declaration of Trust of
Purchaser,  a copy of which is duly filed with the Department of Assessments and
Taxation of the State of Maryland, provides that the name "Health and Retirement
Properties  Trust"  refers  to the  trustees  under  such  Declaration  of Trust
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.

         Section 3.17.  Loan  Administration  And Certain  Other Matters  During
Executory Period.

                  (a) In the event that, after the date hereof, Seller takes any
of the following actions:

                      (i) Agrees to any  modification  or  amendment of the Loan
         Documents without Purchaser's prior written consent;


                                       14

<PAGE>
                    (ii)  Exercises any right or remedy of Seller under the Loan
               Documents  the  effect  of which is to  accelerate  payments  due
               without the prior written consent of Purchaser; or

                    (iii) Alienates, assigns, pledges or otherwise transfers any
               interest in the Loan Documents to any person or entity other than
               Purchaser;

               then, in such event,  Seller shall give Purchaser  notice thereof
               and Purchaser shall have the right to terminate this Agreement by
               notice  given within  three (3)  business  days after  receipt of
               Seller's notice.

                  (b) From and after the date hereof, Agent covenants and agrees
with Purchaser that copies of all notices or communications sent to the Borrower
or Guarantors by Seller or received by Seller with to the Loan  Documents  shall
promptly be sent to Purchaser.

                  (c) Whether or not (i) Borrower or any Guarantor seeks relief,
or an  involuntary  proceeding  is  filled  against  any such  party,  under any
applicable  Federal or state bankruptcy,  insolvency,  reorganization or similar
law, (ii) Borrower or any Guarantor  institutes any  litigation  with respect to
the Loan, or otherwise,  against  Purchaser or Seller,  or (iii) any casualty or
condemnation  event occurs with  respect to the  Mortgaged  Property,  Purchaser
shall  continue to be obligated to perform all of its  obligations in accordance
with the terms of this Agreement.

                  (d)  During  the  term  of  this  Agreement,   Agent  and  its
affiliates and representatives, including, without limitation, the Broker, shall
not solicit or accept  proposals with respect to the sale or discounted  pay-off
of the Loan from any party  other than  Purchaser.  If this  Agreement  shall be
terminated  pursuant to Section 1.9 and,  during the sixty (60) day period after
the date of this  Agreement,  Agent  shall  transfer  the Loan to any  person or
entity or accept a  discounted  payoff  for an amount in excess of the  Purchase
Price,   Agent  shall  pay  such  excess  to  Purchaser  upon  receipt  thereof.
Notwithstanding  anything  to the  contrary  set  forth in this  Agreement,  the
provisions of this paragraph shall survive any termination of this Agreement.

                  (e) Agent  shall  cooperate  with the  reasonable  requests of
Purchaser,  at Purchaser's  expense, in connection with the defense by Purchaser
of any claims  made by the  Borrower  or the  Guarantors  relating to actions by
Seller with respect to the Loan prior to the Closing  Date.  The  provisions  of
this paragraph (e) shall survive the Closing.



                                       15
<PAGE>

         IN WITNESS  WHEREOF,  the parties  hereto have caused their names to be
signed by their  respective  officers  thereunto duly  authorized as of the date
first above written.

                                            SELLER:

                                            BANQUE PARIBAS, AS AGENT
                                            NEW YORK BRANCH


                                            By:/s/_____________________________
                                               Name:
                                               Title:

                                            PURCHASER:

                                            HEALTH AND RETIREMENT
                                            PROPERTIES TRUST


                                            By:/s/_____________________________
                                               Name:
                                               Title:





                                       16
<PAGE>


         The  following  schedules  and  exhibits  have been omitted and will be
provided to the Securities and Exchange Commission upon request:


EXHIBIT A

LIST OF LENDERS



EXHIBIT B

DESCRIPTION OF THE LAND

                             
EXHIBIT C

FORM OF ALLONGE


EXHIBIT D

FORM OF ASSIGNMENT AND ASSUMPTION
OF MORTGAGE AND ASSIGNMENT OF RENTS
AND CERTAIN OTHER LOAN DOCUMENTS


EXHIBIT E

FORM OF ASSIGNMENT AND ASSUMPTION
FOR SERVICING AGREEMENT



EXHIBIT F

FORM OF LENDER'S CERTIFICATE


        
EXHIBIT G

FORM OF AGENT'S CERTIFICATE

                              

                                                                     EXHIBIT 2.2


                     FORBEARANCE AND RESTRUCTURING AGREEMENT

                  THIS   FORBEARANCE   AND    RESTRUCTURING    AGREEMENT   (this
"Agreement")  is  made  as of  May  21,  1998  by and  among  NINE  PENN  CENTER
ASSOCIATES, L.P., a Pennsylvania limited partnership ("NPCA"), having an address
c/o PREIT-Rubin,  The Bellevue, 3rd Floor, 200 South Broad Street, Philadelphia,
PA 19102, THE EQUITABLE LIFE ASSURANCE  SOCIETY OF THE UNITED STATES, a New York
corporation  ("Equitable"),  having an address at 1290  Avenue of the  Americas,
12th  Floor,  New York,  NY 10104,  TRANSPORTATION  ASSOCIATES,  a  Pennsylvania
limited partnership  ("Transportation"),  having an address c/o PREIT-Rubin, The
Bellevue,  3rd Floor,  200 South Broad  Street,  Philadelphia,  PA 19102  (NPCA,
Equitable,  and Transportation are collectively referred to in this Agreement as
the "NPCA Parties"), and HEALTH AND RETIREMENT PROPERTIES TRUST, a Maryland real
estate investment trust ("HRPT") having an address at 400 Centre Street, Newton,
MA 02158 and 1735  MARKET  STREET  PROPERTIES  TRUST,  a  Maryland  real  estate
investment  trust  having an  address  at 400 Centre  Street,  Newton,  MA 02158
("1735")  (HRPT and 1735 are referred to  collectively  in this Agreement as the
"REITS").

                                   BACKGROUND

                  A. NPCA is a  Pennsylvania  limited  partnership  composed  of
Equitable and Transportation, pursuant to that certain "Joint Venture Agreement"
dated as of June 30, 1987, as amended by that certain  "Supplement and Amendment
to  Joint  Venture  Agreement  of  Limited   Partnership  of  Nine  Penn  Center
Associates,  L.P." dated as of April 24, 1992 (such Joint  Venture  Agreement as
amended   being   referred  to  herein  as  the  "Joint   Venture   Agreement").

                  B. NPCA is the  owner of  certain  real  property  located  in
Philadelphia,  Pennsylvania  known as "Nine Penn  Center"  and/or  "Mellon  Bank
Center", and the buildings,  improvements, and certain other property (both real
and personal) situated thereon or associated therewith (collectively,  the "Real
Estate").  On or about May 25,  1988  NPCA,  as  borrower,  entered  into a loan
transaction (the "Loan") as detailed in that certain Construction Loan Agreement
("Construction  Loan  Agreement"),  dated May 25, 1988, with Banque  Paribas,  a
French  banking  corporation  ("Paribas")  acting through its New York branch as
agent for a group of lenders  (each lender being,  individually,  a "Lender" and
all  Lenders  being,  collectively,  the  "Lenders").  In  connection  with  the
Construction  Loan  Agreement,  NPCA  executed and delivered in favor of Paribas
that certain "Construction Loan Mortgage Note" (the "Note"), dated May 25, 1988,
together with that certain "Construction Loan Mortgage, Assignment of Leases and
Rents and Security  Agreement",  dated May 25, 1988 (the "Mortgage"),  and other
related  documents and instruments (the foregoing  Construction  Loan Agreement,
the Note,  the  Mortgage,  and all other such  documents  delivered  in favor of
Paribas being collectively referred to herein as the "Loan Documents").

<PAGE>

                  C. HRPT and Paribas have  entered into that certain  "Purchase
Agreement"  dated as of April 29, 1998 (the "Note Purchase  Agreement") by which
HRPT has agreed to acquire from the Lenders the Note,  together  with all of the
Lenders' right, title and interest in the Loan Documents. Closing under the Note
Purchase  Agreement and  consummation of the transactions  contemplated  thereby
(the  "Note   Closing")   has  been   scheduled   for  Friday,   May  22,  1998.

                  D. HRPT will,  at the Note  Closing,  assign the Note Purchase
Agreement to 1735.

                  E. In anticipation of the Note Closing under the Note Purchase
Agreement,  and conditioned upon the completion of the Note Closing as described
in the  Note  Purchase  Agreement,  NPCA  and the  REITS  have  reached  certain
agreements and understandings  which are set forth in this Agreement,  including
such agreements as relate to the REITS's acquisition of partnership interests in
NPCA at a  closing  described  in  Section  5 of  this  Agreement  (the  "Equity
Closing"). 

                                   AGREEMENTS

                NOW,  THEREFORE,  for and in consideration of the Background and
the mutual  agreements  provided in this Agreement,  and intending to be legally
bound hereby, the parties to this Agreement agree as follows:

                  1.  Representations of NPCA Parties.  Each of the NPCA Parties
(as to itself  only and not as to any  other),  in order to induce  the REITS to
enter  into  this  Agreement  and to  complete  the  Equity  Closing,  makes the
following  representations  and  warranties  to the REITS as of the date of this
Agreement:

                       1.1 The subject NPCA Party is duly  organized and validly
existing under the laws of their respective State of organization.

                       1.2 The subject  NPCA Party has  obtained  all  consents,
approvals,  and  authorizations  from all  persons,  entities,  and  authorities
required  to enter  into this  Agreement,  and to  consummate  the  transactions
contemplated hereby.

                       1.3 There has not been  filed by or against  the  subject
NPCA  Party  , a  petition  in  bankruptcy  or  insolvency  proceedings  or  for
reorganization  or for the appointment of receiver or trustee under any state or
federal laws,  nor has the subject NPCA Party made an assignment for the benefit
of  creditors  or  filed  a  petition  for an  arrangement  or  entered  into an
arrangement  with  creditors  which  petition,   proceedings,   assignment,   or
arrangement has not been dismissed by a final  nonappealable  order of the court
or body having  jurisdiction over the matter; and the subject NPCA Party has not
admitted in writing the inability to pay its debts as they become due.

                                       2
<PAGE>
                       1.4  Each  NPCA   Party  has  the   full,   lawful,   and
unrestricted  right and power to execute,  deliver  and perform its  obligations
under this  Agreement  and to  complete  the  transactions  contemplated  hereby
including the Equity Closing.

                       1.5 There are no rights,  options, or other agreements of
any kind to sell or otherwise  dispose of the Real  Property as a whole to which
the  subject  NPCA  Party is a party  except as set  forth in the Joint  Venture
Agreement and the Loan Documents.

                       1.6 Each NPCA Party's execution, delivery and performance
of this Agreement and the consummation of the transactions  contemplated  hereby
have been duly authorized and no other action is required by law, by the charter
documents  of any NPCA Party,  or  otherwise  for such  authorization;  and this
Agreement  is the legal,  valid and binding  obligation  of, and is  enforceable
against,  each NPCA Party in accordance with its terms except to the extent such
enforcement  may be affected  by general  principles  of equity,  or other laws,
including  bankruptcy  laws,  affecting the rights of creditors  generally;  the
execution of this Agreement and the compliance  with its terms and conditions by
each NPCA Party  will not  breach or  conflict  with the  terms,  conditions  or
provisions  of any other  agreement or  instrument to which such NPCA Party is a
party or by which such NPCA Party is bound, or constitute a default thereunder.

                       1.7  The  Construction  Loan  Agreement,  the  Note,  the
Mortgage,  and the  other  Loan  Documents  are the  legal,  valid  and  binding
obligations  of NPCA,  and the same have not been  modified  or  amended  in any
fashion except as described in this Agreement.

                       1.8  Notwithstanding  the foregoing,  no NPCA Party makes
any representation or warranty to the REITS concerning the character, nature, or
physical qualities of the Real Estate.

                  2. Representations of REITS. The REITS, in order to induce the
NPCA Parties to enter into this  Agreement  and to complete the Equity  Closing,
make the following  representations and warranties to the NPCA Parties as of the
date of this Agreement:                           

                       2.1 Each of the REITS is a real estate  investment  trust
duly organized and validly existing under the laws of the State of Maryland.

                       2.2  Each  of  the  REITS  has  obtained  all   consents,
approvals,  and  authorizations  from all  persons,  entities,  and  authorities
required  to enter  into this  Agreement,  and to  consummate  the  transactions
contemplated hereby including the Equity Closing.

                       2.3 There  has not been  filed by or  against  any of the
REITS, a petition in bankruptcy or insolvency  proceedings or for reorganization
or for the  appointment  of receiver or trustee under any state or federal laws,
nor has any of the REITS made an  assignment  for the  benefit of  creditors  or
filed  a  petition  for an  arrangement  or  entered  into an  arrangement  with
creditors which petition,  proceedings,  assignment, or arrangement has not been
dismissed by final  nonappealable order of the court or body having jurisdiction
over the  matter;  and the  REITS are not  insolvent  and have not  admitted  in
writing the inability to pay its debts as they become due.

                                       3
<PAGE>
                       2.4  Each  of  the  REITS  has  the  full,   lawful,  and
unrestricted  right and power to execute,  deliver,  and perform its obligations
under this Agreement and to complete the transactions contemplated hereby.

                       2.5  Each  of  the   REITS'   execution,   delivery   and
performance  of  this  Agreement  and  the   consummation  of  the  transactions
contemplated  hereby have been duly authorized by the boards of directors of the
REITS and no other action is required by any REITS's  organizational  documents,
or by  law,  by  any  of  the  REITSs'  charter  documents  (including,  without
limitation,  their Declarations of Trust ) or otherwise for such  authorization;
and this  Agreement  is the  legal,  valid and  binding  obligation  of,  and is
enforceable against, the REITS in accordance with its terms except to the extent
such enforcement may be affected by general principles of equity, or other laws,
including  bankruptcy  laws,  affecting the rights of creditors  generally;  the
execution of this Agreement and the compliance  with its terms and conditions by
the REITS will not breach or conflict  with the terms,  conditions or provisions
of any other  agreement or instrument to which the REITS are a party or by which
the REITS are bound, or constitute a default thereunder.

                       2.6 HRPT has no  actual  knowledge  that  any  "Event  of
Default" (as defined under the "Loan  Documents")  exists as of the date of this
Agreement  under the Note or any of the other Loan  Documents  excepting only an
interest payment otherwise due on or about May 18, 1998.

                       2.7  HRPT is  aware  that  Section  5.15 of the  Mortgage
contains,  among other things, a provision to the effect that the mortgagee will
not become a "party in interest" (within the meaning of the Employee  Retirement
Income  Security  Act of 1974,  as now or  hereafter  amended) to any pension or
profit sharing plan which at any time has assets allocated to the Prime Property
Fund of  Equitable  and  prohibiting  the sale  conveyance  or  transfer  of the
Mortgage to a person or entity which would be such a "party in  interest."  HRPT
represents and warrants to NPCA that (i) the sale of the Note and Loan Documents
to HRPT will not result in a violation of the provisions of said Section 5.15 of
the  Mortgage.;  and (ii) upon such sale HRPT shall not be a "party in interest"
(as defined above).

                       2.8 Upon the Equity  Closing,  the REITS shall  expressly
acknowledge,  represent,  warrant, and agree (in a form reasonably satisfactory)
that the "Guaranty of Interest,  Taxes and Operating  Expenses" and "Guaranty of
Completion"  which are part of the Loan  Documents  and which were  delivered by
Equitable  and Mr.  Ronald Rubin,  will have expired  and/or have  terminated by
their terms, and as of such date,  there will be no surviving claims  thereunder
against any of the parties thereto.

                                       4
<PAGE>
                  3. Forbearance.

                       3.1 The parties to this Agreement  acknowledge  and agree
that in accordance with the terms of the Note (and the other Loan Documents) and
Pennsylvania  law,  the Note  matures on May 26,  1998 and is payable in full on
that date.  The REITS hereby agree that,  subject to the terms set forth in this
Agreement,  the REITS shall refrain from  exercising  or otherwise  pursuing any
Lender  Remedies  (as that  term is  hereinafter  defined)  on  account  of such
maturity or  otherwise  until July 1, 1998 (the  "Forbearance  Date").  The term
"Lender  Remedies"  shall mean any and all remedies  available to Paribas or the
Lenders (or any successor in interest to any of them, or any party claiming,  by
through,  or under any of them  including the REITS) which is provided under the
terms of the  Loan  Documents,  or  otherwise  available  in  equity  or at law,
including,  without  limitation,  foreclosure,   acceleration,   declaration  of
default,  notification of tenants,  confession of judgment,  ejectment, or other
form of possession or dispossession.

                       3.2 The  REITS  may  exercise  any and all of the  Lender
Remedies at any time on or after the Forbearance Date to the extent provided and
exercisable  under the  terms of the  applicable  Loan  Documents,  without  the
necessity  of any  additional  or other  notices  or the  passage  of any  grace
periods.

                       3.3 In the event that any NPCA Party  files any  petition
in  bankruptcy,  or any petition in  bankruptcy is filed against any NPCA by any
partner of NPCA,  then upon such filing the  agreements  to forbear set forth in
Section 3.1 above shall  terminate and the REITS may exercise any and all of the
Lender Remedies.

                  4.  Sale of  Paribas  Note.  Each of the NPCA  Parties  hereby
consents to the sale of the Note and the other Loan  Documents to HRPT under the
terms set forth in the Note Purchase Agreement.                          

                  5. Restructuring  Transaction.  The REITS and the NPCA Parties
agree that the Joint Venture Agreement,  and the structure of NPCA itself, shall
be amended as part of the Equity  Closing,  all as  described  and  provided  in
Exhibit A attached hereto. 

                  6. [Intentionally deleted]

                  7. Cost of a  "Challenge".  Each of the parties  hereto agrees
that in the event that any party brings a Challenge (as that term is hereinafter
defined),  such party  shall be  personally  liable to, and  indemnify  and hold
harmless,  the non-challenging  parties with respect to any harm, damage,  cost,
expense,  injury, loss or the like, incurred by the non-challenging parties as a
result of the Challenge including, without limitation, any reasonable attorneys'
fees and expenses,  court costs,  filing costs, or the like, which shall be paid
to the subject  non-challenging  parties  immediately upon demand therefor,  and
such obligation shall not be subject to any limitation which may be set forth in
any of the Loan Documents or elsewhere including any non-recourse language which
may be set forth in any of the Loan Documents.  The term "Challenge"  shall mean
the filing or  initiation  of any suit,  action,  contest,  claim,  request  for
investigation,   

                                       5
<PAGE>
hearing,  or  other  proceeding   (whether  legal,   equitable,
administrative,  in bankruptcy,  or otherwise) challenging the legal and binding
nature of this Agreement or any element or component of this Agreement.  For the
avoidance of doubt, if the parties fail to close on the restructure  transaction
as set forth in Exhibit A attached hereto,  any suit,  action,  contest,  claim,
request  for  investigation,   hearing,  or  other  proceeding  (whether  legal,
equitable,  administrative,  in  bankruptcy,  or  otherwise,  including any such
proceedings initiated for the purpose of enforcing this Agreement (as opposed to
challenging its legality) shall be deemed not to be a "Challenge".  Furthermore,
it is agreed that (i) the obligations  and liabilities  under this Section 7 are
the several (but not joint)  obligations  and liabilities of the parties to this
Agreement;  and (ii)  Equitable  shall have no  responsibility  or  liability to
either  REIT with  respect  to any  Challenge  brought  or  effected  by NPCA or
Transportation  unless Equitable  affirmatively joins in such Challenge;  at the
request  of  either  REIT,  Equitable  agrees to  certify  with  respect  to any
Challenge brought by NPCA or  Transportation  whether it is or is not joining in
such  Challenge  (and if Equitable is not joining in the subject  Challenge Then
Equitable shall cooperate with the REITS in opposing such Challenge).

                  8. Arm's Length Negotiations; Independent Counsel. The parties
to  this  Agreement  acknowledge  that,  all the  terms  of the  Agreement  were
negotiated  at arm's  length and that this  Agreement  was prepared and executed
without  duress,  undue  influence  or coercion of any kind exerted by any party
upon the other.  Each party  stipulates that (i) it has been represented by, and
has relied upon,  independent counsel of its own choosing in the negotiation and
preparation of this Agreement;  and (ii) it and such counsel have each read this
Agreement,  have had its contents  fully  explained to it by such  counsel;  and
(iii) it is fully  aware  of and  understands  all of the  terms  and the  legal
consequences  of this  Agreement.  It is  acknowledged  that the  parties  have,
through their respective  counsel,  mutually  participated in the preparation of
this Agreement.

                  9.  Consent  to  Lifting of  Automatic  Stay.  If NPCA (or any
partner of NPCA) shall (i) file, or be the subject of, a bankruptcy  petition in
any state court or the United States  Bankruptcy  Court,  (ii) be the subject of
any order for relief  issued under any state  bankruptcy  law or the U.S.  Code,
(iii)  file,  or be the  subject of, any  petition  seeking any  reorganization,
arrangement,  composition,  readjustment,  liquidation,  dissolution, or similar
relief  under any  present or future  federal or state  act,  law or  regulation
relating  to  bankruptcy,  insolvency  or other  relief for  debtors,  (iv) have
sought, consented to or acquiesced in the appointment of any trustee,  receiver,
conservator or liquidation  (v) be the subject of any order,  judgment or decree
entered  by any court of  competent  jurisdiction  approving  a  petition  filed
against   such   party  for  any   reorganization,   arrangement,   composition,
readjustment,  liquidation,  dissolution  or similar relief under any present or
future  federal  or  state  act,  law  or  regulation  relating  to  bankruptcy,
insolvency  or relief for debtors,  then, so long as NPCA or any partner of NPCA
would not breach any duty owing to the bankruptcy estate or other constituencies
in the bankruptcy proceeding,  neither NPCA nor any partner of NPCA shall assert
or request any other party to assert that the automatic stay provided by Section
362 of the Bankruptcy  Code shall operate or be interpreted to stay,  interdict,
condition,  reduce or inhibit  the ability of the REITS to enforce any rights it
has by virtue of this  Agreement at law or equity,  or any other rights any REIT
has, 

                                       6
<PAGE>
whether now or hereafter acquired,  against NPCA or against any collateral owned
by NPCA. Specifically,  without limiting the foregoing, in the event of any such
voluntary or involuntary  bankruptcy filing following the execution and delivery
of this Agreement, the REITS shall be entitled and each of NPCA and its partners
irrevocably  consents to an order granting the REITS  immediate  relief from all
stays including the automatic stay imposed by Section 362 of the Bankruptcy Code
so as to permit the REITS to exercise  any and all other rights and remedies the
REITS may have under this Agreement or at law or in equity, and NPCA and each of
its partners hereby irrevocably waives any right to object to such relief.  This
provision  shall be construed as liberally as the law permits to accomplish  the
purpose stated.

                  10.  Limitation.  Each of the parties to this Agreement hereby
represents,  warrants,  acknowledges,  and agrees that this Agreement  shall not
constitute  or be deemed:  (i) a  novation  of the Note or any of the other Loan
Documents;  (ii) an  extension  of any  applicable  notice  or cure  periods  as
provided  under  the Note or the other  Loan  Documents;  (iii) a  modification,
deferral or waiver of any of the  Lender's  Remedies  with  respect to Events of
Default  occurring after the Forbearance Date or a waiver or forgiveness of such
defaults;  or (iv) a waiver,  amendment,  or modification of the  "non-recourse"
language and agreements benefiting any of the NPCA Parties under any of the Loan
Documents.  Nonetheless,  in the event of any conflict or inconsistency  between
the terms of this  Agreement  and the terms of the Note or any of the other Loan
Documents, the terms of this Agreement shall govern and control.

                  11.  Waiver  of  Jury  Trial.  EACH  OF THE  PARTIES  TO  THIS
AGREEMENT KNOWINGLY, VOLUNTARILY,  INTENTIONALLY, AND EXPRESSLY WAIVES THE RIGHT
OF  TRIAL BY JURY IN ANY  ACTION,  SUIT,  OR  PROCEEDING  BROUGHT  UNDER OR WITH
RESPECT TO THIS AGREEMENT OR ANY DISPUTE ARISING UNDER THIS AGREEMENT.

                  12. No  Partnership.  Nothing  in this  Agreement  or the Loan
Documents,  shall create or be deemed to create a  partnership  between the NPCA
Parties or any of them and the REITS or any of their affiliates; and none of the
REITS and none of the NPCA Parties  shall be deemed liable for any of the debts,
liabilities, or obligations of any of the others.

                  13. Entire  Agreement.  This  Agreement  represents the entire
understanding and agreement among the parties with respect to the subject matter
hereof,  superseding all prior  understandings  or  communications  of any kind,
written or oral.  This  Agreement  may be  modified  only by an express  written
agreement signed by all parties hereto.                           

                  14. Miscellaneous.

                       14.1  Captions.   The  captions  in  this  Agreement  are
inserted for convenience of reference only, and in no way define,  describe,  or
limit the scope or intent of this Agreement of any of the provisions hereof.
                                    
                                       7
<PAGE>

                       14.2 Time Periods. Any time periods provided herein which
shall end on a Saturday,  Sunday,  or legal U.S.,  Massachusetts or Pennsylvania
holiday, shall extend to 5:00 p.m. of the next full business day.

                       14.3  Exhibits.   All  Exhibits  to  this  Agreement  are
incorporated herein and made an integral part hereof.

                       14.4 Governing  Law. This Agreement  shall be governed by
and interpreted and enforced in accordance with the laws of the  Commonwealth of
Pennsylvania.
                                    
                       14.5   Recitals.   The   recitals  set  forth  above  are
incorporated herein as though the same were set forth at length.
                                    
                       14.6 Authority and Capacity.  Each party hereto (and each
signatory therefor) hereby represents,  warrants, and agrees that it, he, or she
(as applicable) has full power, authority and/or capacity to execute and deliver
this  Agreement  and the  execution  and  delivery  hereof  does not require the
consent or approval of any party which has not been obtained.
                                    
                       14.7 Successors and Assigns. This Agreement and its terms
are binding  upon,  and shall  inure to the  benefit of, the parties  hereto and
their respective successors and assigns.
                                    
                       14.8  No  Third  Party   Beneficiaries.   Notwithstanding
anything to the contrary  contained  herein,  no provision of this  Agreement is
intended  to  benefit  Paribas,  the  Lenders,  or  any  party  other  than  the
signatories hereto and their permitted  successors and assigns, and no provision
of this Agreement shall be enforceable by any other party.
                                   
                       14.9  Gender;   Plural  Terms;  Persons.  The  masculine,
feminine,  or neuter  pronoun shall each include the  masculine,  feminine,  and
neuter genders.  A reference to person or entity shall mean a natural person,  a
trustee, a corporation,  a partnership,  and any other form of legal entity. All
references (including pronouns) in the singular or plural number shall be deemed
to have been made,  respectively,  in the plural or singular  number as well, as
the context may require.
                                    
                       14.10 Counterparts. This Agreement may be executed in any
number of counterparts,  each of which shall be deemed to be an original and all
of which shall constitute one and the same agreement.
                                    
                       14.11 Non-Waiver.  The failure of any party hereto in any
one or more  instances to insist upon the strict  performance of any one or more
of  the  agreements,  terms,  covenants,   conditions  or  obligations  of  this
Agreement, or to exercise any right, remedy or election herein contained,  shall
not be construed as a waiver or  relinquishment of the right to insist upon such
performance or exercise in the future,  and such right shall continue and remain
in full force and effect with respect to any subsequent breach, act or omission.

                                       8
<PAGE>
                       14.12  Partial  Invalidity.  If any of the  provisions of
this  Agreement,   or  the  application  thereof  to  any  person,   entity,  or
circumstances,  shall, to any extent, be invalid or unenforceable, the remainder
of this Agreement, or the application of such provision or provisions to persons
or  circumstances  other  than  those as to whom or which it is held  invalid or
unenforceable,  shall  not be  affected  thereby,  and every  provision  of this
Agreement shall be valid and enforceable to the fullest extent permitted by law.

                       14.13 Notices.

                       (a) Any and all notices,  demands,  consents,  approvals,
offers,  elections,  and other  communications  required or permitted under this
Agreement shall be deemed  adequately  given if in writing and the same shall be
delivered either in hand, by telecopier with written confirmation of receipt, or
by mail or Federal Express or similar expedited commercial carrier, addressed to
the recipient of the notice,  postpaid and  registered or certified  with return
receipt  requested  (if by mail),  or with all  freight  charges  prepaid (if by
Federal Express or similar carrier).

                       (b)  All  notices   required  or  permitted  to  be  sent
hereunder  shall be deemed to have been given for all purposes of this Agreement
upon the date of  acknowledged  receipt,  in the case of a notice by telecopier,
and in all  other  cases,  upon the date of  receipt  or  refusal,  except  that
whenever under this Agreement a notice is either  received on a day which is not
a Business  Day or is required to be delivered on or before a specific day which
is  not  a  Business  Day,  the  day  of  receipt  or  required  delivery  shall
automatically be extended to the next Business Day.

                       (c) All such notice shall be addressed,

              If to NPCA:       Nine Penn Center Associates, L.P.
                                c/o PREIT-Rubin
                                Third Floor
                                The Bellevue
                                200 South Broad Street
                                Philadelphia, PA  19102
                                Attn:    Mr. Ronald Rubin
                                [Telecopier No. (215) 546-7311]

                                        9
<PAGE>




                           with a copy to:
                                Obermayer Rebmann Maxwell & Hippel LLP
                                One Penn Center
                                19th Floor
                                1617 John F. Kennedy Boulevard
                                Philadelphia, PA  19103-1895
                                Attn:    Jeffrey B. Rotwitt, Esq.
                                [Telecopier No. (215) 665-3165]

                           with a copy to:
                                ERE Yarmouth
                                One Boston Place
                                Suite 2020
                                Boston, MA  02108
                                Attn:    Mr. Dana J. Harrell
                                   [Telecopier No. (617) 523-2555]

              If to the REITS:  Health and Retirement Properties Trust
                                400 Centre Street
                                Newton, MA  02157
                                Attn:    Mr. David J. Hegarty
                                [Telecopier No. (617) 332-2261]

                           with a copy to:
                                Sullivan & Worcester LLP
                                One Post Office Square
                                Boston, MA  02109
                                Attn:    Jennifer B. Clark, Esq.
                                [Telecopier No. (617) 338-2880]

              If to Equitable:  The Equitable Life Assurance Society of
                                The United States
                                c/o ERE Yarmouth
                                One Boston Place
                                Suite 2020
                                Boston, MA  02108
                                Attn:    Mr. Dana J. Harrell
                                [Telecopier No. (617) 523-2555]



                                       10

<PAGE>


                           with a copy to:
                                Paul, Weiss, Rifkind, Wharton & Garrison
                                1285 Avenue of the Americas
                                New York, NY  10019-6064
                                Attn:  Walter F. Leinhardt, Esquire         
                                      [Telecopier No. (212) 373-2771]

         If to Transportation: Transportation Associates
                                c/o PREIT-Rubin
                                Third Floor
                                The Bellevue
                                200 South Broad Street
                                Philadelphia, PA  19102
                                [Telecopier No. (215) 546-7311]

                          with a copy to:
                                Klehr, Harrison, Harvey, Branzburg & Ellers LLP
                                1401 Walnut Street
                                Philadelphia, PA  19102
                                Attn:    Leonard M. Klehr, Esquire
                                [Telecopier No. (215) 568-6603]

                       (d) By  notice  given as  herein  provided,  the  parties
hereto and their respective successor and assigns shall have the right from time
to time and at any time  during  the terms of this  Agreement  to  change  their
respective  addresses effective upon receipt by the other parties of such notice
and each shall have the right to specify as its address any other address within
the United States of America.

                       14.14   Recording.   Neither  this   Agreement   nor  any
memorandum  thereof,  or the like,  shall be recorded in any real estate records
maintained for the benefit of the public in any jurisdiction for any purpose.
                                    
                       14.15 Condition Precedent.  As provided in paragraph D of
the Background of this Agreement,  the agreements and  understandings  set forth
herein are expressly  conditioned  upon the completion of the Note Closing under
the terms of the Note  Purchase  Agreement.  Furthermore,  in the event that the
Note  Closing has not occurred  (for any reason on or before May 26, 1998,  then
this  Agreement  shall  terminate and be of no further force or effect  (without
notice or any act of any party required to effect such termination).

                       14.16  Financials.  The NPCA Parties shall provide copies
of audited  financial  statements for the NPCA  partnership  with respect to the
1995,  1996 and 1997  calendar  years and  unaudited  financials  for the period
ending March 31, 1998, such financial  statements having been prepared at NPCA's
sole cost and expense. The NPCA shall, at the REITS' expense, cooperate with the
REITS in the preparation of audited financial statements for the Real 

                                       11
<PAGE>

Estate for the above listed periods.  NPCA and its accountants shall provide the
REITS and  their  accountants  with such  certifications  with  respect  to such
financials as the REITS shall from time to time reasonably require.  Each of the
REITS hereby  agrees to  indemnify,  defend,  and hold harmless each of the NPCA
Parties with respect to any and all suits, claims, harms, expenses, and the like
(including  all  reasonable  attorneys  fees)  which  arise  out  of  any of the
certifications  provided  under  the  terms of this  Section  14.16  (excepting,
however,  the gross negligence or willful misconduct of the subject NPCA Party).
To the extent  that any of the  foregoing  requires  any  services  from  NPCA's
auditors not already incurred by NPCA or ordinarily contracted for by NPCA, then
HRPT shall pay for the same upon demand therefor.

                       14.17.  NON-LIABILITY  OF TRUSTEES.  THE  DECLARATIONS OF
TRUST  ESTABLISHING  THE  REITS,  A COPY OF EACH OF  WHICH,  TOGETHER  WITH  ALL
AMENDMENTS THERETO  (COLLECTIVELY,  THE "DECLARATIONS"),  IS DULY FILED WITH THE
DEPARTMENT OF ASSESSMENTS  AND TAXATION OF THE STATE OF MARYLAND,  PROVIDES THAT
THE NAMES  "HEALTH AND  RETIREMENT  PROPERTIES  TRUST" AND "1735  MARKET  STREET
PROPERTIES  TRUST",  RESPECTIVELY,  REFER TO THE TRUSTEES UNDER THE DECLARATIONS
COLLECTIVELY  AS TRUSTEES,  BUT NOT  INDIVIDUALLY  OR  PERSONALLY,  AND THAT NOT
TRUSTEE, OFFICER,  SHAREHOLDER,  EMPLOYEE OR AGENT OF THE REITS SHALL BE HELD TO
ANY PERSONAL LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY OBLIGATIONS OF, OR CLAIM
AGAINST,  THE REITS.  ALL PERSONS DEALING WITH THE REITS, IN ANY WAY, SHALL LOOK
ONLY TO THE ASSETS OF THE REITS FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF
ANY OBLIGATIONS.

                                       12

<PAGE>
                IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  this
Agreement  by their duly  authorized  representatives,  intending  to be legally
bound, as of the date written above.

                         NINE PENN CENTER ASSOCIATES, L.P.
                         a Pennsylvania limited partnership, by its partners:

                         BY: The Equitable Life Assurance Society
                             of the United States, a New York corporation:

                             By: /s/ Frederick F. Buchholz
                                Name:  Frederick F. Buchholz
                                Title: Investment Officer

                         BY: Transportation Associates, a Pennsylvania limited
                         partnership, by a general partner:

                             By: /s/ Ronald Rubin
                                Name:  Ronald Rubin
                                Title:  General Partner

                         HEALTH AND RETIREMENT PROPERTIES
                         TRUST, a Maryland real estate investment trust:

                         BY: /s/ 
                            Name:
                            Title:

                         TRANSPORTATION ASSOCIATES, a 
                         Pennsylvania limited partnership:

                         BY: /s/ Ronald Rubin
                            Name:  Ronald Rubin
                            Title: General Partner

                         THE EQUITABLE LIFE ASSURANCE
                         SOCIETY OF THE UNITED STATES, a
                         New York corporation:

                         BY: /s/ Frederick F. Buchholz
                            Name:  Frederick F. Buchholz
                            Title: Investment Officer

                                       13
<PAGE>


                         1735 MARKET STREET PROPERTIES 
                         TRUST, a Maryland real estate investment trust:

                         BY: /s/ John A. Mannix
                            Name:  John A. Mannix
                            Title:

                                       14

<PAGE>




         Exhibit  A to the  Forbearance  and  Restructuring  Agreement  has been
omitted and will be provided to the  Securities  and  Exchange  Commission  upon
request.  Exhibit  A  contains  details  regarding  the  tax  structure  of  the
transaction,  pro ration of expenses and income  pending the  acquisition of the
property and certain operational matters.







                                                                      Exhibit 23

                    Consent of Independent Public Accountants

As independent  public  accountants we hereby  consent to the  incorporation  by
reference in this registration  statement and related  Prospectus  Supplement of
Health and Retirement  Properties  Trust, and to the  incorporation by reference
into Health and Retirement  Properties  Trusts's  previously filed  Registration
Statements Nos. 33-62135, 333-47815, 333-47817 and 333-52353 of our report dated
May 26, 1998 on the  statements  of revenue and certain  expenses of 1735 Market
Street for the year ended  December 31, 1997,  included in Health and Retirement
Properties  Trust's  Current  Report on Form 8-K  dated May 22,  1998 and to all
references to our firm  included in this  Registration  Statement  (Registration
Statement File No. 333-26887).

                                      /s/ Arthur Andersen LLP

Philadelphia, Pennsylvania
May 26, 1998



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