AGREEMENT OF PURCHASE AND SALE


                                       between


                  Brandywine Operating Partnership, L.P., Purchaser,


                                         and


                         RREEF MidAmerica/East Fund-IV, Seller


                                   741 First Avenue
       King of Prussia, Upper Merion Township, Montgomery County, Pennsylvania 





                                  Table of Contents


1.   Purchase Price.. . . . . . . . . . . . . . . . . . . . . . . . . .  1

2.   Deposit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1

3.   Review of the Property.. . . . . . . . . . . . . . . . . . . . . .  2

4.   Title and Survey.. . . . . . . . . . . . . . . . . . . . . . . . .  3

5.   Representations and Warranties.. . . . . . . . . . . . . . . . . .  4
          5.1  Representations and Warranties of Seller.. . . . . . . .  4
          5.2  Representations and Warranties of Purchaser. . . . . . .  7
          5.3  Limitations.   . . . . . . . . . . . . . . . . . . . . .  7
          5.4  Condition of Property. . . . . . . . . . . . . . . . . .  8

6.   Closing Conditions.. . . . . . . . . . . . . . . . . . . . . . . .  8
          6.1  Title Insurance. . . . . . . . . . . . . . . . . . . . .  8
          6.2  Estoppel Letters . . . . . . . . . . . . . . . . . . . .  8
          6.3  Representations and Warranties . . . . . . . . . . . . .  9
          6.4  Seller Performance . . . . . . . . . . . . . . . . . . .  9

7.   Other Agreements.. . . . . . . . . . . . . . . . . . . . . . . . .  9

8.   Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
          8.1  Closing of Sale. . . . . . . . . . . . . . . . . . . . . 10
          8.2  Prorations; Adjustments. . . . . . . . . . . . . . . . . 10
          8.3  Proration of Service Charges.. . . . . . . . . . . . . . 11
          8.4  Closing Costs. . . . . . . . . . . . . . . . . . . . . . 12
          8.5  Possession.. . . . . . . . . . . . . . . . . . . . . . . 12
          8.6  Seller's Closing Documents.. . . . . . . . . . . . . . . 12
          8.7  Purchaser's Closing Documents. . . . . . . . . . . . . . 13
          8.8  Joint Deliveries.. . . . . . . . . . . . . . . . . . . . 14

9.   Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
          9.1  Modifications. . . . . . . . . . . . . . . . . . . . . . 14
          9.2  Casualty and Condemnation. . . . . . . . . . . . . . . . 14
          9.3  Time of Essence. . . . . . . . . . . . . . . . . . . . . 14
          9.4  Notices. . . . . . . . . . . . . . . . . . . . . . . . . 14
          9.5  Parties Bound. . . . . . . . . . . . . . . . . . . . . . 16
          9.6  Governing Law. . . . . . . . . . . . . . . . . . . . . . 16

                                     i




          9.7  Continuation Until Closing; Leasing. . . . . . . . . . . 16
          9.8  Brokers. . . . . . . . . . . . . . . . . . . . . . . . . 16
          9.9  Attorneys' Fees. . . . . . . . . . . . . . . . . . . . . 17
          9.10 Remedies for Non-Performance.. . . . . . . . . . . . . . 17
          9.11 Brokers Commission.. . . . . . . . . . . . . . . . . . . 17
          9.12 Survival of Covenants. . . . . . . . . . . . . . . . . . 17
          9.13 Seller's Investment Committee Approval.. . . . . . . . . 17
          9.14 ERISA. . . . . . . . . . . . . . . . . . . . . . . . . . 17
          9.15 Entry and Indemnity. . . . . . . . . . . . . . . . . . . 18
          9.16 Release. . . . . . . . . . . . . . . . . . . . . . . . . 18
          9.17 Confidential Information.  . . . . . . . . . . . . . . . 19
          9.18 Calculation of Time Periods. . . . . . . . . . . . . . . 19
          9.19 Entire Agreement.. . . . . . . . . . . . . . . . . . . . 19
          9.20 Severability.. . . . . . . . . . . . . . . . . . . . . . 20
          9.21 Facsimile Signatures.. . . . . . . . . . . . . . . . . . 20
          9.22 Further Assurances.. . . . . . . . . . . . . . . . . . . 20
          9.23 Offer. . . . . . . . . . . . . . . . . . . . . . . . . . 20
          9.24 Seller Exculpation Clause. . . . . . . . . . . . . . . . 20
          9.25 Purchaser Exculpation Clause.. . . . . . . . . . . . . . 21
          9.26 SEC Reporting (8-K) Requirements.. . . . . . . . . . . . 21

List of Schedules and Exhibits. . . . . . . . . . . . . . . . . . . . . 23



                                       ii



                            AGREEMENT OF PURCHASE AND SALE


     BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited partnership 
("Purchaser") agrees to purchase, and RREEF MIDAMERICA/EAST FUND-IV, a 
California group trust ("Seller") agrees to sell, that certain improved real 
property, hereinafter referred to as the "Property", situated in the City of 
King of Prussia, Upper Merion Township, Montgomery County, Commonwealth of 
Pennsylvania, legally described on Exhibit A attached hereto and made a part 
hereof, consisting of a single parcel of real estate improved with a building 
commonly known as 741 First Avenue, King of Prussia, Pennsylvania, together 
with all rights, privileges, easements and appurtenances thereto,  including 
any and all mineral rights, development rights, air rights, and the like; all 
personal property owned by the Seller and located on or used in conjunction 
with the Property (specifically excluding furniture, fixtures and equipment 
owned by RREEF Management Company and located in the RREEF Management Company 
office); any and all intangible personal property owned by Seller and used in 
the operation of the Property, including the right to use the name of the 
property (but not the name "RREEF"), to the extent assignable, but excluding 
computer software and related licenses; contract rights, "Leases" of all or 
any part of the Property, all licenses, permits and other written 
authorizations necessary for the use, operation and ownership of the 
Property, records, security deposits and prepaid rent, if any, and the 
benefit of any guaranties of the Leases.

     1.   Purchase Price.  The purchase price for the Property ("Purchase 
Price") is Six Million Three Hundred Forty Thousand Dollars ($6,340,000.00), 
payable by wire transfer of immediately available funds at Closing as defined 
in Paragraph 8.1.

     2.   Deposit.  

          2.1  Purchaser has previously deposited, pursuant to this Agreement 
and pursuant to the Other Agreements (defined in Paragraph 7 below), the 
amount of Five Hundred Fifty Thousand Dollars ($550,000.00) (the "Deposit") 
with Commonwealth Land Title Insurance Company ("Escrow Holder") as earnest 
money to secure Purchaser's performance hereunder and under the Other 
Agreements.  The Deposit may be invested at the direction of Purchaser with 
the approval of Seller.  All investment income earned from the investment of 
the Deposit, less investment fees, if any, will be added to and become a part 
of the Deposit and will be applied toward the Purchase Price under the KOP 
Agreement (defined in Paragraph 7) if Closing is completed in accordance with 
this Agreement; otherwise all interest will be paid to the party entitled to 
the Deposit.  The escrow instructions to Escrow Holder will be in the form of 
Schedule 2.1 attached hereto (the "Escrow Instructions").   If Purchaser does 
not elect to terminate this Agreement pursuant to Section 3 below, prior to 
the end of the Review Period (defined in Section 3.4), on or before one 
business day after last day of the Review Period Purchaser shall deposit an 
additional $500,000 with Escrow Holder, which shall be added to and become a 
part of the Deposit for all purposes hereunder.





          2.2  Of the total Deposit, the sum of $150,000 is agreed to be 
non-refundable, and shall be refunded to Purchaser only (i) if Purchaser 
terminates this Agreement under Section 3.4, under the circumstances set 
forth in Section 3.4.1, or (ii) if the Agreement is terminated or if the 
Closing fails to occur by reason of Seller's default.  Under all other 
circumstances, wherever under this Agreement and the Other Agreements the 
Deposit is to be returned to Purchaser, $150,000 out of the Deposit shall be 
paid to Seller, to be retained by Seller as fully earned.

     3.   Review of the Property. 

          3.1  From and after the "Effective Date" (as defined in Paragraph 
9.23), Seller agrees to provide Purchaser and its agents or consultants with 
access to the Property to inspect each and every part thereof to determine 
its present condition and to conduct such physical and environmental studies 
(including a mechanical and roof study and Phase I environmental assessment) 
as it deems appropriate.  

          3.2  Within three (3) business days after the Effective Date Seller 
will make available to Purchaser for inspection and copying, all to the 
extent in the possession of Seller or its managing agent, a copy of each 
existing Lease and equipment lease, service contract and maintenance or other 
contract pertaining to the operations of the Property that will survive 
Closing, a copy of each  real estate tax bills for 1994-1996, both inclusive, 
and unaudited financial statements for the Property for the years 1994-1996, 
both inclusive.

          3.3  Within three (3) business days after the Effective Date Seller 
will make available to Purchaser for inspection and copying at the office of 
Seller's managing agent, all to the extent in the possession of Seller or its 
managing agent:

               3.3.1     a copy of each environmental reports relating to the 
Property prepared by third party consultants since January 1, 1995.

               3.3.2     a copy of each current franchises, business or other 
licenses, bonds, permits, certificates, authorizations and other evidences of 
consent, approval, authorization or permission relating to or affecting the 
Project of or from any person, including any governmental authority, held by 
Seller, including any pending applications.

               3.3.3     a copy of each material third party warranties and 
guaranties, if  any, which are in effect with respect to the Property.

          3.4  Purchaser has until 5:00 p.m. CST on February 2, 1998 (the 
"Review Period"), to determine in its sole discretion whether all matters 
relating to the Property (except title and survey, which are governed by 
Paragraph 4), are acceptable, and to obtain the approval of the transaction 
contemplated herein by Seller's Board of Directors.  If Purchaser concludes 
that any matter relating to the Property is not acceptable or that its Board 
has disapproved the 

                                      2


transaction, Purchaser will so notify Seller (the "Termination Notice") prior 
to the expiration of the Review Period (which notice shall contain a copy of 
Purchaser's roof/structural report and other reports or studies, other than 
environmental reports, obtained in connection with Purchaser's due 
diligence).  Upon timely delivery of the Termination Notice, this Agreement 
will terminate without liability on the part of Seller or Purchaser, other 
than Purchaser's indemnity contained in Paragraph 9.15 hereof and the 
obligation to deliver to Seller a copy of any environmental report obtained 
by Purchaser if requested by Seller within ten (10) days after receipt of the 
Termination Notice.  In the event that Purchaser does not timely so notify 
Seller, Purchaser will be deemed to have concluded that all matters relating 
to the Property are acceptable and to have elected to proceed with the 
transaction upon the terms and conditions contained in this Agreement 
(including the obligation to increase the amount of the Deposit by an 
additional $500,000) without regard to this Paragraph 3.4. 

               3.4.1     If this Agreement is terminated pursuant to 
Paragraph 3.4, the Deposit, less $150,000, will be returned to Purchaser as 
provided in the Escrow Instructions.  This $150,000 shall be paid to Seller, 
unless Purchaser's termination resulted from (i) Seller's default, (ii) a 
material deviation from the economics of the Property as presented in 
Seller's offering memorandum (it being understood and agreed that Seller 
makes no warranty or representation as to said offering memorandum), or (iii) 
any material structural or environmental defect in the Property not known or 
disclosed to Purchaser before December 22, 1997.

          3.5  Purchaser agrees that any information obtained by Purchaser or 
its authorized agents in the conduct of its due diligence will be treated as 
confidential pursuant to Paragraph 9.17.

     4.   Title and Survey.  Purchaser has ordered, at its expense (and upon 
receipt, Purchaser shall promptly deliver copies to Seller): (i) a commitment 
for a 1992 form ALTA Owner's title insurance policy with respect to the 
Property from Commonwealth Land Title Insurance Company (the "Title Insurer") 
in the amount of the Purchase Price, and (ii) copies of all documents 
relating to title exceptions referred to therein.  Seller has already 
ordered, and Purchaser has received, at Purchaser's sole expense, a plat of 
survey of the Property made in accordance with Minimum Standard Detail 
Requirements for ALTA/ACSM Land Title Surveys (1992) pursuant to the accuracy 
standards of an Urban Survey.  On or before January 30, 1998, Purchaser 
agrees to notify Seller of any objection Purchaser may have to any exceptions 
reported in the commitment or any matter shown on the plat of survey (the 
"Unacceptable Exceptions").  Seller will be responsible for satisfaction of 
the Title Insurer's Schedule B-1 seller requirements.  All other exceptions 
and survey matters will be deemed acceptable to Purchaser.  If Purchaser 
fails to give such notice to Seller, the survey and all of the exceptions in 
the title commitment will be deemed acceptable to Purchaser.  Seller will 
have ten (10) days after receipt of Purchaser's notice within which to notify 
Purchaser whether Seller elects to either (a)  eliminate or induce the Title 
Insurer to insure over (subject to Purchaser's consent, not to be 
unreasonably withheld) the Unacceptable Exceptions or (b) terminate this 
Agreement.  If Seller agrees to eliminate or induce to the Title Insurer to 
insure over (with Purchaser's consent) the 


                                      3





Unacceptable Exceptions, Seller will be obligated to do so at its cost on or 
prior to Closing.   If Seller elects to terminate this Agreement, neither 
party will have any further rights or obligations hereunder, except as 
provided in Paragraph 9.15.  If Seller fails to give any timely notice, 
Seller will be deemed to have elected to terminate this Agreement.  If  any 
other recorded exception to title is discovered after the commitment is 
delivered to Purchaser, and Purchaser does not elect to waive such exception 
upon the first to occur of (a) the Closing or (b) seven (7) days after being 
notified of such exception and to proceed with the consummation of the 
Closing, Seller will have fifteen (15) days after the expiration of said 
seven (7) day period (and Closing will be delayed if necessary, so that it 
occurs not earlier than twenty-two (22) days after Purchaser is notified of 
such exception) after notifying Purchaser of such discovery in which to use 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over (subject to Purchaser's approval, not to be unreasonably 
withheld) such exception, and if such exception is not eliminated or insured 
over as aforesaid within said 15-day period, Purchaser may terminate this 
Agreement, in which event the Deposit will be returned to Purchaser and 
neither party will have any further rights or obligations hereunder except as 
provided in Paragraph 9.15, or close the sale subject to such exception.  
Seller agrees that it will pay off at Closing (and not induce the Title 
Insurer to insure over) title exceptions representing monetary liens of a 
definite or ascertainable amount voluntarily granted by Seller.  In using 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over Unacceptable Exceptions, Seller will not be required to 
litigate or to expend more than $10,000 in the aggregate.  Ad valorem real 
estate taxes not yet due and payable and all title and survey matters which 
are not Unacceptable Exceptions are hereinafter referred to as Acceptable 
Exceptions. 

     5.   Representations and Warranties.
 
          5.1  Representations and Warranties of Seller.  As used in this 
Paragraph 5.1 and elsewhere in this Agreement, the phrase "to the knowledge 
of Seller" or phrases of similar import mean and are limited to the actual 
current knowledge, without duty to investigate or inquire, of Seller's 
portfolio manager (Pamela Boneham) and Seller's local manager  having ongoing 
management responsibility with respect to the Property (Barbara Gillentine), 
and not to any constructive knowledge of any of the foregoing individuals or 
of Seller or any investment advisor to Seller, any entity that is a partner 
in such investment advisor, or any affiliates of any thereof, or to any 
officer, agent, representative, or employee of Seller or such investment 
advisor, any such constituent partner, or any such affiliate.  Seller hereby 
warrants and represents to Purchaser (with such representations and 
warranties to be re-made as of Closing pursuant to Paragraph 8.6.10) as 
follows:

               5.1.1     Pending Proceedings.  With the exception of the 
items set forth in  Schedule 5.1 (the "Disclosure Schedule") to the knowledge 
of Seller, Seller has received no written notice of special assessments, 
condemnation, environmental, zoning or other land use regulation proceedings, 
either pending or planned to be instituted, with respect to the Property or 
any part thereof.   


                                        4




               5.1.2     Status of Seller and Closing Documents.  Subject to 
Paragraph 9.13, this Agreement has been, and all the closing documents to be 
delivered by Seller to Purchaser at Closing are or will be, duly authorized, 
executed, and delivered by Seller, will be sufficient to convey insurable 
title, are legal, valid, and binding obligations of Seller, are enforceable 
in accordance with their respective terms, and do not violate any provisions 
of any agreement to which Seller or the Property is subject or bound.  Seller 
is duly organized and validly existing and, if required, duly qualified to 
transact business in the State in which the Property is located.  

               5.1.3     Non-Foreign Status.  Seller is not a foreign person 
within the meaning of Section 1445(f)(3) of the Internal Revenue Code of 
1986, as amended.

               5.1.4     Compliance with Laws.  With the exception of the 
items set forth in the Disclosure Schedule, Seller has received no 
governmental notice, not heretofore corrected, alleging that the Property or 
its current uses are in violation of any zoning, building, health, traffic, 
environmental, flood control or all other applicable rules, regulations, 
codes, ordinances, or statutes of any local, state and federal authorities or 
any other governmental authority (collectively, the "Laws") asserting 
jurisdiction over the Property. 

               5.1.5     Service Contracts.  With the exception of the items 
set forth in the Disclosure Schedule, to Seller's knowledge, there are no 
agreements or contracts affecting the Property (including, without 
limitation, any management, leasing, services or maintenance agreements) 
which are not terminable at will by Seller without further liability, upon 
not more than 30 days' prior written notice.  The contracts and agreements to 
be assigned to Purchaser pursuant to Paragraph 8.6.5 are listed on Schedule 
5.1.5 attached hereto.  Seller agrees to terminate the existing management 
agreement covering the Property on or before Closing.

               5.1.6     No Default.  The execution and delivery of this 
Agreement, and consummation of the transaction described in this Agreement, 
does not and will not constitute a default under any contract, lease, or 
agreement to which Seller is a party or by which Seller is bound.

               5.1.7     No Suits.  Except as set forth in the Disclosure 
Schedule and except for personal injury or property damage actions for which 
there is adequate insurance coverage and where the insurance carrier has 
accepted the tender of the defense without reservation, to Seller's 
knowledge, there is no action, suit or proceeding  pending or threatened 
against or affecting the Property or any portion thereof, or relating to or 
arising out of the ownership, management or operation of the Property, in any 
court or before or by any federal, state, or municipal department, 
commission, board, bureau or agency or other governmental instrumentality.

               5.1.8     Environmental Condition.  Each of the following 
representations contained in this Paragraph 5.1.8 is wholly qualified and 
limited by (a) any matters disclosed in 


                                     5




any materials made available or delivered to Purchaser by Seller pursuant to 
Paragraph 3 above or otherwise, (b) any matters disclosed in any 
environmental reports or studies obtained by Purchaser, and (c) any other 
matters of which Purchaser has actual knowledge. Subject to the foregoing, 
Seller represents: 

                    5.1.8.1   With the exception of items listed in the 
Disclosure Schedule, and except (i) in amounts customarily found in office 
uses and in the other uses for which the Property is suited and used and (ii) 
in compliance with applicable law, to Seller's knowledge, Seller has not 
released, generated or handled Hazardous Materials on the Property, and 
Seller has no knowledge of any release, generation or handling of Hazardous 
Materials on the Property by any tenants or the incorporation of Hazardous 
Materials by the tenants in any improvements on the Property during the time 
Seller owned the Property.  For the purposes hereof, "Hazardous Material"  
means any substance, chemical, waste or other material which is listed, 
defined or otherwise identified as "hazardous" or "toxic" under any federal, 
state, local or administrative agency ordinance or law, including, without 
limitation, the Comprehensive Environmental Response, Compensation and 
Liability Act, 42 U.S.C. Sections 9601 et seq. and the Resource Conservation 
and Recovery Act, 42 U.S.C. Sections 6901 et seq., or any regulation, order, 
rule or requirement adopted hereunder, as well as any formaldehyde, urea, 
polychlorinated biphenyls, petroleum, petroleum product or by-product, crude 
oil, natural gas, natural gas liquids, liquefied natural gas, or synthetic 
gas usable for fuel or mixture thereof, radon, asbestos, and "source," 
"special nuclear" and "by-product" material as defined in the Atomic Energy 
Act of 1985, 42 U.S.C. Sections 3011 et seq. 

                    5.1.8.2   With the exception of items listed in the 
Disclosure Schedule, to Seller's knowledge, Seller has not received any 
summons, citation, directive, letter or other communication, written or oral, 
from the United States Environmental Protection Agency or the State 
environmental protection agency having jurisdiction over the Property.

               5.1.9     Options.  Seller has granted no options or rights of 
first refusal to acquire any interest in the Property not set forth in the 
Leases delivered to Purchaser or in documents of record disclosed in the 
title commitment.

               5.1.10    Rent Roll.  To Seller's knowledge, the information 
set forth on the rent roll attached hereto as Schedule 5.1.10  is true and 
accurate in all material respects.

               5.1.11    Tenant Rights.  There are no termination, extension, 
cancellation, or expansion rights under any occupancy arrangements with 
respect to the Property except as contained in the Leases. 

               5.1.12    Leasing Commissions.  All leasing commissions, free 
rent and tenant improvement allowances due and payable as of the date hereof 
by Seller have been paid or will have been paid on or before Closing.  To 
Seller's knowledge, the only current leases as to 


                                        6




which commissions, free rent and tenant improvement allowances may become due 
in the future are listed on Schedule 5.1.12, which future obligations shall 
be expressly assumed by Purchaser.

               5.1.13    There are no employees of the Property or Seller who 
will become employees of Purchaser or for which Purchaser shall be 
responsible in any way.

          5.2  Representations and Warranties of Purchaser.  Purchaser hereby 
represents and warrants to Seller that this Agreement has been, and all the 
documents to be delivered by Purchaser to Seller will be, duly authorized, 
executed, and are or will be legal, valid, and binding obligations of 
Purchaser, are or will be enforceable in accordance with their respective 
terms, and do not and will not at Closing violate any provisions of any 
agreement to which Purchaser is subject.

          5.3  Limitations.  Each of the representations and warranties of 
Seller contained in Paragraph 5.1: (i) is made as of the date of this 
Agreement; (ii) will be deemed to be remade by Seller, and to be true in all 
material respects, as of Closing, subject to other matters expressly 
permitted in this Agreement or otherwise specifically approved in writing by 
Purchaser; and (iii) will survive for a period of one (1) year after the 
Closing Date, as defined in Paragraph 8.1.  Any claim that Purchaser may have 
at any time against Seller for a breach of any such representation or 
warranty, whether known or unknown, which is not asserted by notice from 
Purchaser to Seller within such six (6) month period will not be valid or 
effective, and Seller will have no liability with respect thereto.  Nor will 
Seller have any liability to Purchaser for a breach of any representation or 
warranty unless the valid claims for all such breaches collectively aggregate 
more than One Hundred Thousand Dollars ($100,000.00), in which event the full 
amount of such valid claims shall be actionable, subject to the limitation in 
Section 9.10. The continued accuracy in all material respects of the 
aforesaid representations and warranties is a condition precedent to 
Purchaser's obligation to close.  If any of said representations and 
warranties is not correct in all material respects at the time the same is 
made or as of Closing, and Seller had no knowledge of such inaccuracy when 
the representation or warranty was made, or when remade at Closing, or if 
such warranty or representation becomes inaccurate on or prior to Closing 
other than by reason of Seller's default hereunder, Purchaser may, upon being 
notified of such occurrence on or prior to Closing either (a) terminate this 
Agreement without liability on the part of Seller or Purchaser, other than 
Purchaser's indemnity contained in Paragraph 9.15 and the Deposit will be 
returned to Purchaser, or (b) waive such matter and proceed to Closing, by 
notice to Seller given within ten (10) days after Purchaser is notified of 
such occurrence, but in no event later than Closing.  If Purchaser fails to 
give any notice within the required time period, Purchaser will be deemed to 
have elected to waive such matter and to proceed to Closing.  If any of said 
representations and warranties are not correct in all material respects at 
the time the same is made or as of Closing, and Seller had knowledge of such 
inaccuracy when the representation or warranty was made, or, by its default 
hereunder caused the representation or warranty to be inaccurate when remade 
at Closing, Purchaser may either (x) terminate this Agreement subject to its 
obligations under Paragraph 9.15, receive a return of the Deposit and recover 
from Seller all of Purchaser's actual, reasonable out-of-pocket costs 
incurred in connection with its review of 


                                    7





the Property or (y) waive the breach and its rights under clause (x) and 
proceed to Closing, by notice to Seller given within ten (10) days after 
Purchaser is notified of such occurrence, but in no event later than Closing. 
 If Purchaser fails to give any notice within the required time period, 
Purchaser will be deemed to have elected to waive such matter and to proceed 
to Closing.

          5.4  Condition of Property.  Except as expressly set forth in this 
Agreement, Seller has not made and does not hereby make any representations, 
warranties or other statements as to the condition of the Property and 
Purchaser acknowledges that at Closing it is purchasing the Property on an 
"AS IS, WHERE IS" basis and without relying on any representations and 
warranties of any kind whatsoever, express or implied, from Seller, its 
agents or brokers as to any matters concerning the Property.  Except as 
expressly set forth in this Agreement, no representations or warranties have 
been made or are made and no responsibility has been or is assumed by Seller 
or by any partner, officer, person, firm, agent or representative acting or 
purporting to act on behalf of Seller as to the condition or repair of the 
Property or the value, expense of operation, or income potential thereof or 
as to any other fact or condition which has or might affect the Property or 
the condition, repair, value, expense of operation or income potential of the 
Property or any portion thereof.  The parties agree that all understandings 
and agreements heretofore made between them or their respective agents or 
representatives are merged in this Agreement and the Schedules and Exhibits 
hereto annexed, which alone fully and completely express their agreement, and 
that this Agreement has been entered into after full investigation, or with 
the parties satisfied with the opportunity afforded for investigation, 
neither party relying upon any statement or representation by the other 
unless such statement or representation is specifically embodied in this 
Agreement or the Exhibits annexed hereto.  Purchaser acknowledges that Seller 
has requested Purchaser to inspect fully the Property and investigate all 
matters relevant thereto and, with respect to the condition of the Property, 
to rely solely upon the results of Purchaser's own inspections or other 
information obtained or otherwise available to Purchaser, rather than any 
information that may have been provided by Seller to Purchaser.  

     6.   Closing Conditions.  Purchaser's obligation to proceed to Closing 
is conditioned upon Seller's performance of the following obligations and 
satisfaction of the following conditions, in addition to all of its other 
obligations and conditions contained in this Agreement, provided that 
Purchaser may in its sole discretion elect to waive failure by Seller to 
perform any particular obligation.

          6.1  Title Insurance.  The Title Insurer is prepared to issue a 
policy of title insurance insuring Purchaser's interest in the Property being 
conveyed, subject only to Acceptable Exceptions. 
     
          6.2  Estoppel Letters.  Seller has delivered to Purchaser not later 
than the date of Closing, estoppel letters substantially in the form of 
Schedule 6.2 ("Required Estoppel Form") or in form otherwise reasonably 
acceptable to Purchaser, prepared by Seller and


                                    8




addressed to Purchaser, from tenants occupying in the aggregate at least 75% 
of the Property, measured by square footage.  All estoppel letters must be 
dated not more than forty-five (45) days prior to the date of Closing.  An 
estoppel letter form, even though not in the Required Estoppel Form, will be 
deemed reasonably acceptable to Purchaser if said letter contains the 
following information: confirming rent, security deposit, square footage  and 
termination date; that no rent has been paid more than one month in advance; 
that the lease is in full force and effect and that a true and correct copy 
of the lease with all amendments and modifications is attached; and that all 
work to be performed by Landlord has been performed and that the tenant has 
no knowledge of any Landlord default.

               6.2.1     If Seller is unable to obtain the requisite estoppel 
letters as described above, Seller may (but is not required to) substitute 
for any unsigned estoppel letter from a tenant other than a Major Tenant an 
estoppel letter in the Required Estoppel Form, which may be completed, 
executed and delivered by Seller and warranted and represented by Seller, 
provided that such substituted estoppel letters will not collectively 
represent in excess of 10% of all of the tenants, measured by square footage. 
 Seller's representations and warranties in the certificates will survive the 
Closing subject to the limitations of Paragraph 5.3.  In the event that, 
following the Closing Date, Seller or Purchaser obtains an estoppel letter 
complying with the requirements of Paragraph 6.2 with respect to any lease 
for which Seller delivered a substituted estoppel letter, Seller will deliver 
such estoppel letter to Purchaser and, upon such delivery, Seller will be 
automatically released from any liability or obligation under the substituted 
estoppel letter previously delivered by Seller with respect to such lease.  
Purchaser may (but shall not be required to) accept a substituted estoppel 
letter as to a Major Tenant as well.

               6.2.2     If Seller is unable to obtain and deliver sufficient 
tenant estoppel certificates as required under Paragraph 6.2, or if the 
letters received under Paragraph 6.2 or substituted estoppels permitted under 
Paragraph 6.2.1 contain information or omissions unacceptable to Purchaser in 
its reasonable discretion, then Seller will not be in default by reason 
thereof, but Purchaser may, by notice given to Seller before the Closing, 
elect (i) to waive said conditions and proceed with the Closing or (ii) to 
terminate this Agreement, and receive a refund of the Deposit.  If Purchaser 
elects to terminate this Agreement, neither party will have any further 
rights or obligations hereunder except as provided in Paragraph 9.15.

          6.3  Representations and Warranties.  All of Seller's 
representations and warranties made pursuant to Paragraph 5.1 remain true and 
correct in all material respects.

          6.4  Seller Performance.  Seller has delivered all of the documents 
and other items required pursuant to Paragraph 8.6 and has performed all 
other covenants, undertakings and obligations required by this Agreement, to 
be performed or complied with by Seller at or prior to Closing.

     7.   Other Agreements.  The obligations of Purchaser and Seller to close 
hereunder shall also be conditioned upon the simultaneous closing of (a) the 
purchase by Purchaser or an 


                                       9




affiliate of Purchaser, of twelve industrial and office buildings and a 
parcel of vacant land in King of Prussia Business Park, King of Prussia, 
Pennsylvania, pursuant to that certain Agreement of Purchase and Sale of even 
date herewith ("KOP Agreement") between Purchaser, as purchaser, and RREEF 
USA Fund-I  ("KOP Owner"), as seller, and (b) the purchase by Purchaser or an 
affiliate of Purchaser, of the industrial building commonly known as 180 
Wheeler Court, Bucks County, Pennsylvania, pursuant to that certain Agreement 
of Purchase and Sale of even date herewith (the "Wheeler Court Agreement"; 
the KOP Agreement and the Wheeler Court Agreement collectively the "Other 
Agreements") between Purchaser, as purchaser, and RREEF MidAmerica East-V 
Six, Inc. ("Wheeler Court Owner"; the KOP Owner and the Wheeler Court Owner 
are collectively referred to as the "Other Owners"), as seller.  This 
condition may be waived by the parties.  Without limiting the generality of 
the foregoing, if Purchaser terminates this Agreement pursuant to Section 3 
or Section 4, the Other Owners shall have the right to terminate the Other 
Agreements as well; or, if Purchaser terminates one or more of the Other 
Agreements pursuant to Section 3 or Section 4 of the Other Agreements, Seller 
shall have the right to terminate this Agreement as well.  A default by 
Purchaser under one or more of the Other Agreements shall be deemed a 
Purchaser default hereunder, and a default by an Other Owner under one or 
more of the Other Agreements shall be deemed a Seller default hereunder.

     8.   Closing.

          8.1  Closing of Sale.  The purchase and sale contemplated herein 
shall close (herein referred to as the "Closing") at the office of the Title 
Insurer, or as otherwise mutually agreed, on a date selected by Seller, which 
date (the "Closing Date") shall not be earlier than the date which is fifteen 
(15) days after the expiration of the Review Period nor more than thirty (30) 
days after expiration of the Review Period, time being of the essence.  At 
Closing, Seller will deliver to Purchaser a Special Warranty Deed ("Deed") in 
the form of Schedule 8.6.1 and other closing documents required hereunder and 
Purchaser will cause payment of the Purchase Price to be made to Seller by 
wire transfer.  The sale (payment of the Purchase Price and delivery of the 
Deed) may, at Purchaser's option to be exercised by notice to Seller at least 
five (5) days prior to the Closing Date, be closed through escrow with the 
Title Insurer in accordance with the general provisions of the usual form of 
escrow agreement used in similar transactions by such Title Insurer with 
special provisions inserted (i) as may be required to conform with this 
Agreement and (ii) to close on a so-called "New York Style" basis.

          8.2  Prorations; Adjustments.   The parties will prorate taxes, 
rental, and other income, and operating or other expenses of the Property as 
of 12:01 a.m. on the date after Closing (i.e., Seller is entitled to the 
income and responsible for the expenses of the day of Closing).  All income 
will be prorated on the basis of income actually received by Seller, as 
opposed to income which is due or for which Seller has rendered invoices but 
which has not been paid (i.e., Seller will not be entitled to any credit for 
receivables, and there will be no proration as to such receivables).  Any 
taxes or other expenses of the Property for any period prior to Closing which 
are payable by tenants of the Property subsequent to Closing (e.g., real 
estate taxes paid in arrears and not yet billed to tenants), will reduce the 
credit to Purchaser for such items (i.e., no 


                                      10




credit from Seller for pass-through items for which Purchaser will later 
collect from the tenants).  To the extent that the taxes to be prorated are 
not known with certainty, such proration will be based upon the most recent 
tax bill or county estimate, to be re-prorated upon issuance of final bills. 
Seller also agrees to give Purchaser a credit against the Purchase Price for 
all cash security deposits required to be held pursuant to the Leases (less 
portions thereof applied by Seller to tenant defaults and not subsequently 
restored by the tenant in question) and all interest due thereon and shall 
assign to Purchaser any other tenant deposits held by Seller.  Purchaser will 
pay amounts subsequently received by it from tenants constituting base rent, 
capital reimbursements or other income due from tenants and attributable to 
Seller's period of ownership, but not collected as of the date of Closing, to 
Seller promptly upon receipt; provided that amounts received from tenants by 
Purchaser will be first applied to current charges, and the balance will be 
applied to payments due to Seller.  Notwithstanding the foregoing, Seller 
shall expressly reserve the right to seek to collect, directly from the 
tenants after Closing and with Purchaser's cooperation, any delinquencies and 
other amounts attributable to Seller's period of ownership, but not collected 
as of the date of Closing.  To the extent Seller has received amounts from 
tenants for real estate taxes and 1997 and 1998 operating expenses in excess 
of amounts paid by Seller with respect to such expenses, Seller will credit 
such excess to Purchaser at Closing, and Seller will provide adequate backup 
information in connection with such credit.   On or after the Closing, Seller 
will have no further obligations with respect to any Leases or other 
agreements affecting the Property, including, without limitation, tenant 
improvement work, leasing commissions and free rent.

               8.2.1     Seller and Purchaser hereby agree to use their 
reasonable efforts to calculate prorations (including real estate tax 
prorations) so as to permit settlement thereof on the Closing Date, provided, 
however, that if any of such prorations cannot be calculated accurately on 
the Closing Date, then the same will be calculated as soon as reasonably 
practicable after the Closing Date, but in no event later than the later to 
occur of (i) thirty (30) days after Seller receives its final cost 
certification for the year in which Closing occurs, or (ii) March 31 of the 
year following the year in which Closing occurs, and either party owing the 
other party a sum of money based on such subsequent proration(s) shall 
promptly pay said sum to the other party, together with interest thereon at 
the rate of two percent (2%) per annum over the "prime rate" (as announced 
from time to time in the Wall Street Journal) from the Closing Date to the 
date of payment if payment is not made within thirty (30) days after delivery 
of a bill therefor together with reasonable back-up documentation.  This 
obligation of the parties will survive Closing.

          8.3  Proration of Service Charges.  To the extent Seller, as 
opposed to tenants, is responsible for payment of utility charges, Seller 
will attempt to have utility meters read as of the Closing Date.  To the 
extent that this is not possible and to the extent that any other obligation 
for continuing services is incurred, and statements are rendered for such 
services covering periods both before and after the Closing Date, the amount 
will be adjusted between the parties as of the Closing Date on a per-diem 
basis.  Seller will forward any such statements which it receives to 
Purchaser and Purchaser will pay the same. Seller will remit to Purchaser its 
proportionate share immediately upon demand.


                                     11




          8.4  Closing Costs.  Purchaser agrees to pay (i) the Title 
Insurer's escrow and/or closing fees (including any payment to the closing 
officer of the Title Insurer as may be the local custom at the Closing), (ii) 
the cost of the title commitment and basic policy and endorsements, if any, 
required to meet Seller's obligations hereunder and the cost of any 
endorsements to the title policy required by Purchaser, including extended 
coverage, (iii) all recording fees and taxes with respect to the Deed, (iv) 
all costs of Purchaser's physical inspections of the Property (environmental, 
engineering) and other due diligence activities; (v) all costs of survey, 
including fees and charges of Gannett Fleming Associates (originally engaged 
by Seller); (vi) cancellation charges, if applicable, to Coventry Abstract 
(originally engaged by Seller); and (vii) one-half (1/2) of applicable 
transfer taxes.  Seller agrees to pay (i) all recording fees with respect to 
clearing Seller's title, and (ii) one-half (1/2) of applicable transfer 
taxes.  Except as otherwise provided in Paragraph 9.9, each party is 
responsible for its own attorneys' and other professional fees.  All other 
closing costs shall be allocated in accordance with the prevailing local 
custom.

          8.5  Possession.  Subject to the rights of tenants pursuant to 
Leases delivered to Purchaser, Seller will deliver possession of the Property 
and of any conveyed personal property to the Purchaser on the date of Closing 
and Seller will thereupon deliver to Purchaser the originals of all Leases, 
all correspondence with tenants, tenant/lease files, operating statements, 
plans and specifications, supplies and advertising materials, booklets, keys, 
and other items used in connection with operation of the Property.

          8.6  Seller's Closing Documents.  As part of the Closing, Seller 
will deliver to Purchaser:  

               8.6.1     the Deed, in the form of Schedule 8.6.1

               8.6.2     an affidavit in customary form that Seller is not a 
foreign person within the meaning of Section 1445(e) of the Internal Revenue 
Code of 1986, in the form of Schedule 8.6.2; 

               8.6.3     such affidavits as are customarily required by Title 
Insurer in connection with issuance of the owner's basic title insurance 
policy, including a mechanics' lien and judgment affidavit; 

               8.6.4     an assignment of the Leases in the form of Schedule 
8.6.4 ("Lease Assignment"); 

               8.6.5     an assignment of contracts and warranties in the 
form of Schedule 8.6.5 ("Contracts Assignment"), assigning to Purchaser all 
contracts listed on Schedule 5.1.5, other than those designated by Purchaser 
for termination by notice to Seller not less than thirty (30) days prior to 
Closing;


                                    12




               8.6.6     an assignment of intangibles in the form of Schedule 
8.6.6 ("Intangibles Assignment");

               8.6.7     letters, in form to be supplied by Purchaser, to the 
tenants at the Property,  instructing the tenants to pay rent to Purchaser 
and to recognize Purchaser as landlord under their Leases; 

               8.6.8     a bill of sale conveying all personal property of 
Seller, if any, located at the Property and used in connection with the 
maintenance or operation thereof (specifically excluding furniture, fixtures 
and equipment owned by RREEF Management Company and located in the RREEF 
Management Company office), in the form of Schedule 8.6.8; 

               8.6.9     a rent roll, certified by Seller as being true and 
correct, to Seller's knowledge, as of the Closing Date, in the form 
previously delivered to Purchaser;

               8.6.10    a "bring down certificate" stating that Seller's 
representations and warranties are true and correct as of the Closing Date, 
in the form of Schedule 8.6.10;

               8.6.11    estoppel certificates as required by Paragraph 6.2 
herein; and 

               8.6.12    all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

          8.7  Purchaser's Closing Documents.  As part of the Closing, 
Purchaser will deliver to Seller:  

               8.7.1     good federal funds in an amount equal to the 
Purchase Price, less the Deposit and interest thereon and plus or minus 
prorations as provided herein and plus funds sufficient to pay Purchaser's 
closing costs hereunder; 

               8.7.2     such affidavits as are customarily required by Title 
Insurer in connection with issuance of the owner's title insurance policy; 

               8.7.3     executed counterpart of the Lease Assignment;

               8.7.4     executed counterpart of the Contracts Assignment;

               8.7.5     executed counterpart of the Intangibles Assignment;

               8.7.6     all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.


                                     13




          8.8  Joint Deliveries.  At the Closing, Seller and Purchaser will 
execute and deliver to each other the following documents in proper form:

               8.8.1     Closing Statement;

               8.8.2     City, county and state transfer tax declarations or 
similar instruments; and 

               8.8.3     All other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

     9.   Miscellaneous.

          9.1  Modifications.  This Agreement can be amended only in writing 
signed by both of the parties.

          9.2  Casualty and Condemnation.  Seller agrees to keep its 
customary replacement cost insurance covering the Property in effect until 
the Closing. If between the Effective Date and the Closing the improvements 
on the Property are destroyed or damaged to the extent that repairs cost in 
excess of $250,000 in the estimate of an architect or contractor selected by 
Seller and reasonably acceptable to Purchaser, or if condemnation proceedings 
are commenced against the Property, Purchaser may (i) terminate this 
Agreement or (ii) elect to accept the Property in its then condition, in 
which event Seller will pay or assign to Purchase at Closing all proceeds of 
insurance (plus the applicable deductible) or condemnation awards payable to 
Seller by reason of such damage or condemnation.  In the event Purchaser 
makes neither election by the earlier of (a) Closing or (b) ten (10) days 
after being advised of such casualty or condemnation, Purchaser will be 
deemed to have elected to accept the Property in its then condition.  In the 
event of any other damage to the Property, Seller may either repair the 
damage or give Purchaser a reduction in the Purchase Price equal to the cost 
of repairing such damage, as certified by an architect or contractor selected 
by Seller and reasonably acceptable to Purchaser.  In the event of any damage 
where Purchaser does not have the right to terminate and Seller elects to 
repair such damage, the Closing Date shall be delayed for the number of days 
required to repair the damage, which Seller agrees to do in accordance with 
all Laws and in a good and workmanlike manner.    

          9.3  Time of Essence.  Time (including, without limitation, the 
date specified as the Closing Date) is of the essence of this Agreement.

          9.4  Notices.  All notices required or permitted hereunder must be 
in writing and shall be served on the parties at the following address:

          If to Purchaser:    Brandywine Realty Trust


                                       14




                              Newtown Square Corporate Campus
                              16 Campus Blvd.
                              Suite 150
                              Newtown Square, PA 19073
                              Attn:     Gerard H. Sweeney, President & CEO
                                        Brad A. Molotsky, General Counsel
                              Facsimile: (610-325-5622)               

          If to Seller:       RREEF MidAmerica/East Fund-IV
                              c/o The RREEF Funds
                              875 N. Michigan Avenue
                              Suite 4100
                              Chicago, IL 60611
                              Attn: Mr. John Turney & Ms. Pamela Boneham
                              Facsimile: (312) 266-9346
          
          with a copy to:     RREEF MidAmerica/East Fund-IV
                              c/o The RREEF Funds
                              650 Park Avenue
                              Suite 210
                              King of Prussia, PA 19406
                              Attn: Ms. Barbara Gillentine
                              Facsimile: (610) 337-2308
          
          and a copy to:      D'Ancona & Pflaum
                              30 North LaSalle Street
                              Suite 2900
                              Chicago, Illinois  60602
                              Attn: Lawrence J. Moss
                              Facsimile: (312) 580-0923

Any such notices may be sent by (a) certified mail, return receipt requested, in
which case notice will be deemed delivered three (3) business days after
deposit, postage prepaid in the U.S. mail or (b) a nationally recognized
overnight courier, in which case notice will be deemed delivered one business
day after deposit with such courier or (c) facsimile transmission, in which case
notice will be deemed delivered upon electronic verification that transmission
to recipient was completed, provided that notices sent by facsimile transmission
on a day other than a business day, or before 9:00 a.m. or after 5:00 p.m.
recipient's time on a business day, shall be deemed given on the first business
day following the date of transmission or (d) personal delivery.  The above
addresses and facsimile numbers may be changed by notice to the other party;
provided that no notice of a change of address or facsimile number will be
effective until actual receipt of such notice.


                                       15



          9.5  Parties Bound.  Neither party may assign this Agreement 
without the prior written consent of the other, and any such prohibited 
assignment shall be void; provided that Purchaser may assign this Agreement 
without Seller's consent to an Affiliate; provided that the assignee is not a 
party-in-interest as described in Paragraph 9.14.  Subject to the foregoing, 
this Agreement is binding upon and inure to the benefit of the respective 
legal representatives, successors, assigns, heirs, and devisees of the 
parties.  For the purposes of this Paragraph, the term "Affiliate" means (a) 
an entity that directly or indirectly controls, is controlled by or is under 
common control with the Purchaser or (b) an entity at least a majority of 
whose economic interest is owned by Purchaser; and the term "control" means 
the power to direct the management of such entity through voting rights, 
ownership or contractual obligations.

          9.6  Governing Law.  The performance and interpretation of this 
Agreement is controlled by the law of the Commonwealth of Pennsylvania.

          9.7  Continuation Until Closing; Leasing. 

               9.7.1      Between the Effective Date and the Closing, Seller 
agrees to keep and perform all of the obligations to be performed by landlord 
under any Leases and Laws.  Seller agrees to operate the Property in the same 
manner as before the making of this Agreement, the same as though Seller were 
retaining the Property.  Seller agrees not to convey the Property, nor to 
grant any liens or easements with respect thereto.

               9.7.2     Seller shall not permit or consent to any new 
leases, amendments, extensions, renewals (other than pursuant to tenant 
renewal options, if any) or subleases without first submitting them to 
Purchaser for Purchaser's approval on an approval form in the form attached 
hereto as Schedule 9.7.2, which approval shall not be unreasonably withheld.  
Purchaser shall have three (3) business days to notify Seller of its approval 
of such leases, amendments, extensions, renewals or subleases, and in the 
event that Purchaser does not so notify Seller, the leases, amendments, 
extensions, renewals or  subleases, as the case may be, shall be deemed 
approved.  

               9.7.3     With respect to any new lease or lease modification 
entered into by Seller after December 18, 1997 and approved by Purchaser, by 
the terms of which Seller obligates itself to perform or performs or pays or 
contracts for any tenant improvement work or additional landlord work 
required pursuant to such lease, or pays or contracts for any leasing 
commissions or grants any free rent period or other financial concessions, 
then such expenses and/or free rent or other concessions, and all other 
third-party costs incurred (including attorneys' fees) in connection with 
such lease, will be a credit to Seller at Closing to the extent Seller paid 
such amounts prior to Closing; otherwise Purchaser agrees to assume liability 
for the payment and performance of such obligations in accordance with the 
terms thereof.

          9.8  Brokers.  Seller and Purchaser each (i) represents and 
warrants to the other that it has not dealt with any broker or finder in 
connection with the transaction contemplated by 


                                      16




this Agreement other than the parties, if any, to be paid a commission as 
specified in Paragraph 9.11, and (ii) agrees to defend, indemnify and hold 
the other harmless from and against any losses, damages, costs, or expenses 
(including attorneys' fees) incurred by such other party due to a breach of 
the foregoing warranty by the indemnifying party.

          9.9  Attorneys' Fees.  Notwithstanding any limitation on remedies 
or amounts recoverable set forth elsewhere herein, if any action is brought 
by either party against the other party, the party in whose favor final 
judgment is entered will be entitled to recover court costs incurred and 
reasonable attorneys' fees at trial, upon appeal and on any petition for 
review.

          9.10 Remedies for Non-Performance.  Purchaser's remedies regarding 
breach of warranty or representation by Seller are governed by Paragraph 5.3. 
In the event of any other default by Seller hereunder, Purchaser may, as its 
sole and exclusive remedy, either (i) terminate this Agreement and seek 
damages, subject to performance of Purchaser's indemnities set forth in 
Paragraph 9.15, and receive back the Deposit or (ii) seek specific 
performance.  If said sale is not consummated because of a default under this 
Agreement on the part of Purchaser, the Deposit will be paid to and retained 
by Seller as Seller's sole and exclusive remedy.  Seller and Purchaser 
acknowledge that the Deposit is a reasonable forecast of just compensation 
for the harm that could be caused by Purchaser's default and that the harm 
suffered by Seller is difficult or impossible to accurately ascertain or 
predict.  NOTWITHSTANDING ANY OTHER PROVISION OF THIS AGREEMENT TO THE 
CONTRARY, SELLER'S TOTAL LIABILITY FOR DAMAGES FOR BREACH OF THE COVENANTS, 
AGREEMENTS, WARRANTIES AND REPRESENTATIONS UNDER THIS AGREEMENT AND THE OTHER 
AGREEMENTS, COLLECTIVELY, SHALL NEVER EXCEED TWO MILLION DOLLARS 
($2,000,000.00), AND IN NO EVENT SHALL SELLER BE LIABLE FOR SPECIAL, 
EXEMPLARY, CONSEQUENTIAL OR PUNITIVE DAMAGES.

          9.11 Brokers Commission.  Seller agrees to pay the brokerage 
commission due The Flynn Company pursuant to a separate agreement.

          9.12 Survival of Covenants.  All covenants hereunder which, by 
their terms, are intended to survive Closing will survive Closing hereunder.

          9.13 Seller's Investment Committee Approval. This condition has 
been satisfied.

          9.14 ERISA.  Purchaser represents and warrants to Seller that none 
of Purchaser's assets are "plan assets," (as that term is defined by 29 CFR 
Section 2510.3-101) because all plans that are subject to the provisions of 
the Employee Retirement Income Security Act of 1974, as amended, and which 
have invested in Purchaser hold only "equity interests," (as that term is 
defined by 29 CFR Section 2510.3-101(b)(1)) that are "publicly-offered 
securities," (as that term is defined by 29 CFR Section 2510.3-101(b)(2)).  
Purchaser further represents and warrants to Seller that 


                                      17




it is not any one of the types of entities listed in 29 CFR Section 
2510.3-101(h), the character of which would identify its assets as "plan 
assets."

          9.15 Entry and Indemnity.  In connection with any entry by 
Purchaser, or its agents, employees or contractors onto the Property, 
Purchaser shall give Seller reasonable advance notice of such entry and shall 
conduct such entry and any inspections in connection therewith so as to 
minimize, to the greatest extent possible, interference with Seller's 
business and the business of Seller's tenants and otherwise in a manner 
reasonably acceptable to Seller. Without limiting the foregoing, prior to any 
entry to perform any on-site testing, Purchaser shall give Seller notice 
thereof, including the identity of the company or persons who will perform 
such testing and the proposed scope of the testing.  Seller shall approve or 
disapprove the scope and methodology of such proposed testing within three 
(3) business days after receipt of such notice, such approval to be within 
the sole and unfettered discretion of Seller; Seller's failure to notify 
Purchaser of its approval or disapproval shall be deemed to be Seller's 
disapproval thereof.  If Purchaser or its agents, employees or contractors 
take any sample from the Property in connection with any such approved 
testing, upon Seller's request, Purchaser shall provide to Seller a portion 
of such sample being tested to allow Seller, if it so chooses, to perform its 
own testing.  Seller or its representative may be present to observe any 
testing or other inspection performed on the Property.  Upon Seller's 
request, Purchaser shall promptly deliver to Seller copies of any reports 
relating to any testing or other inspection of the Property performed by 
Purchaser or its agents, employees or contractors.  Purchaser shall maintain, 
and shall assure that its contractors maintain, public liability and property 
damage insurance in amounts and in form and substance adequate to insure 
against all liability of Purchaser, its agents, employees or contractors, 
arising out of any entry or inspections of the Property pursuant to the 
provisions hereof, and Purchaser shall provide Seller with evidence of such 
insurance coverage upon request by Seller.  Purchaser shall indemnify, defend 
and hold Seller harmless from and against any costs, damages, liabilities, 
losses, expenses, liens or claims (including, without limitation, reasonable 
attorney's fees) arising out of or relating to any entry on the Property by 
Purchaser, its agents, employees or contractors in the course of performing 
the inspections, testings or inquiries provided for in this Agreement, 
including without limitation damage to the Property or release of hazardous 
substances or materials onto the Property, excluding, however, any costs 
incurred by Seller in supervising Purchaser's testing.  The foregoing 
indemnity shall survive beyond the Closing, or if the sale is not 
consummated, beyond the termination of this Agreement. 

          9.16 Release.  Except to the extent of the representations and 
warranties of Seller expressly set forth in this Agreement, and except to the 
extent of a breach by Seller of applicable laws, but otherwise 
notwithstanding any other provision of this Agreement to the contrary, 
Purchaser, on behalf of itself and its successors and assigns, waives its 
right to recover from, and forever releases and discharges, Seller, Seller's 
affiliates, Seller's investment manager, the partners, trustees, 
shareholders, directors, officers, employees and agents of each of them, and 
their respective heirs, successors, personal representatives and assigns 
(collectively, the "Seller Related Parties"), from any and all demands, 
claims, legal or administrative proceedings, losses, liabilities, damages, 
penalties, fines, liens, judgments, costs or expenses whatsoever (including,

         
                                       18



 
without limitation, attorneys' fees and costs), whether direct or indirect, 
known or unknown, foreseen or unforeseen, which may arise on account of or in 
any way be connected with the physical condition of the Property or any law 
or regulation applicable thereto, including, without limitation, the 
Comprehensive Environmental Response, Compensation and Liability Act of 1980, 
as amended (42 U.S.C. Sections 9601 et seq.), the Resources Conservation and 
Recovery Act of 1976 (42 U.S.C. Section 6901 et seq.), the Clean Water Act 
(33 U.S.C. Section 466 et seq.), the Safe Drinking Water Act (14 U.S.C. 
Sections 1401-1450), the Hazardous Materials Transportation Act (49 U.S.C. 
Section 1801 et seq.), and the Toxic Substance Control Act (15 U.S.C. 
Sections 2601-2629) 

          9.17 Confidential Information.  The parties acknowledge that the 
transaction described herein is of a confidential nature and shall not be 
disclosed except to consultants, investors,  advisors, and affiliates, or as 
required by law.  No party will make any public disclosure of the specific 
terms of this Agreement, except as required by law.  Without limiting the 
generality of the foregoing, any press release or other public disclosure 
regarding this Agreement or the transactions contemplated herein, and the 
wording of same, must be approved in advance by both parties.  In connection 
with the negotiation of this Agreement and the preparation for the 
consummation of the transactions contemplated hereby, each party acknowledges 
that it will have access to confidential information relating to the other 
party.  Each party shall treat such information as confidential, preserve the 
confidentiality thereof, and not duplicate or use such information, except to 
advisors, consultants, investors and affiliates in connection with the 
transactions contemplated hereby.  In the event of the termination of this 
Agreement for any reason whatsoever, Purchaser will return to Seller, at 
Seller's request, all documents, work papers, and other material (including 
all copies thereof) obtained from Seller in connection with the transactions 
contemplated hereby, and each party shall use its best efforts, including 
instructing its employees and others who have had access to such information, 
to keep confidential and not to use any such information.  The provisions of 
this Paragraph 9.17 will survive the Closing or, if the purchase and sale is 
not consummated, any termination of this Agreement.  

          9.18 Calculation of Time Periods.  Unless otherwise specified, in 
computing any period of time described herein, the day of the act or event, 
after which the designated period of time begins to run, is not to be 
included and the last day of the period so computed is to be included, unless 
such last day is a Saturday, Sunday or legal holiday, in which event the 
period shall run until the end of the next day which is neither a Saturday, 
Sunday, or legal holiday (i.e., a day on which federally chartered banks are 
not open for business in Chicago, Illinois).  The last day of any period of 
time described herein shall be deemed to end at 5 p.m. Chicago, Illinois time 
on the last day of such period of time. All days other than Saturdays, 
Sundays and legal holidays in which national banks are closed in Chicago, 
Illinois are business days hereunder.

          9.19 Entire Agreement.  This Agreement and any other document to be 
furnished pursuant to the provisions hereof embody the entire agreement and 
understanding of the parties hereto as to the subject matter contained 
herein. There are no restrictions, promises, 


                                   19




representations, warranties, covenants, or undertakings other than those 
expressly set forth or referred to in such documents.  This Agreement and 
such documents supersede all prior agreements and understandings among the 
parties with respect to the subject matter hereof

          9.20 Severability.  Any term or provision of this Agreement that is 
invalid or unenforceable in any jurisdiction will, as to such jurisdiction, 
be ineffective to the extent of such invalidity or unenforceability without 
rendering invalid or unenforceable the remaining terms and provisions of this 
Agreement, or affecting the validity or enforceability of any of the terms or 
provisions of this Agreement.

          9.21 Facsimile Signatures.  Executed facsimile copies of this 
Agreement or any amendments hereto shall be binding upon the parties, and 
facsimile signatures appearing hereon or on any amendments hereto shall be 
deemed to be original signatures.

          9.22 Further Assurances.  In addition to the acts and deeds recited 
herein and contemplated to be performed, executed and/or delivered by Seller 
to Purchaser at Closing, Seller agrees to perform, execute and deliver, but 
without any obligation to incur any additional liability or expense, on or 
after the Closing any further deliveries and assurances as may be reasonably 
necessary to consummate the transactions contemplated hereby or to further 
perfect the conveyance, transfer and assignment of the Property to Purchaser.

          9.23 Offer.  Execution and delivery of this Agreement by Purchaser 
constitutes an offer to purchase the Property on the terms contained herein. 
Delivery by Seller of a copy of  the fully executed Agreement by facsimile 
transmission on or before the Expiration Date, followed by a manually signed 
copy thereof delivered the next business day after transmission of such copy, 
shall constitute acceptance by Seller as of the date of the facsimile 
transmission. The date on which Seller delivers a fully executed copy of this 
Agreement to Purchaser, or delivers a copy by facsimile transmission followed 
by a manually signed copy as provided in the preceding sentence is referred 
to herein as the "Effective Date."

          9.24 Seller Exculpation Clause.  The obligations of Seller 
contained herein are intended to be binding only on the property of the trust 
party to this Agreement of Purchase and Sale and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the trustees, investment managers, any general partners thereof, or any 
employees or agents of the trustees or investment managers.  All documents to 
be executed by Seller shall also contain the foregoing exculpation.


                                      20




          9.25 Purchaser Exculpation Clause.  No recourse shall be had for 
any obligation of Brandywine Operating Partnership, L.P. and Brandywine 
Realty Trust under this Agreement or under any document executed in 
connection herewith or pursuant hereto, or for any claim based thereon or 
otherwise in respect thereof, against any past, present or future trustee, 
shareholder, officer or employee of Brandywine Operating Partnership, L.P. or 
Brandywine Realty Trust, whether by virtue of any statute or rule of law, or 
by the enforcement of any assessment or penalty or otherwise, all such 
liability being expressly waived and released by the Seller and all parties 
claiming by, through or under Seller.

          9.26 SEC Reporting (8-K) Requirements.  For the period of time 
commencing on the date hereof and continuing through the first anniversary of 
the Closing Date, and without limitation of other document production 
otherwise required of Seller hereunder, Seller shall, from time to time, upon 
reasonable advance written notice from Purchaser, provide Purchaser and its 
representatives, with (a) access to all financial information pertaining to 
the period of Seller's ownership and operation of the Property, which 
information is relevant and reasonably necessary, in the opinion of 
Purchaser's outside, third party accountants (the "Accountants"), to enable 
Purchaser and its Accountants to prepare financial statements in compliance 
with any or all of (i) Rule 3-05 or 3-15 of Regulation S-X of the Securities 
and Exchange Commission (the "Commission"), as applicable; (ii) any other 
rule issued by the Commission and applicable to Purchaser; and (iii) any 
registration statement, report or disclosure statement filed with the 
Commission, by, or on behalf of Purchaser; and (b) a representation letter, 
signed by the 




                                      21




individual(s) responsible for Seller's financial reporting, substantially in 
the form of Schedule 9.26 attached hereto, which representation letter may be 
required by the Accountants in order to render an opinion concerning Seller's 
financial statements.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the dates set forth below.

SELLER:                                   PURCHASER:                      
                                                                          
RREEF MIDAMERICA/EAST FUND-IV             BRANDYWINE OPERATING            
                                          PARTNERSHIP, L.P.               
                                                                          
By:  RREEF America L.L.C., its            By:  Brandywine Realty Trust,   
     investment advisor                        its authorized general     
                                               partner                    
                                                                          
By:________________________________       By:____________________________ 
     Authorized Representative                 Gerard H. Sweeney          
                                               President and Chief        
Dated: ____________________________            Executive Officer          
                                          Dated:_________________________ 





                                     22



                            List of Schedules and Exhibits

Schedules

2.1                      Escrow Instructions
5.1                      Disclosure Schedule
5.1.5                    Service Contracts
5.1.10                   Rent Roll
5.1.12                   Future Leasing Commissions, Tenant Improvements and 
                         Free Rent
6.2                      Form of Estoppel Letter
8.6.1                    Form of Deed
8.6.2                    FIRPTA Certificate
8.6.4                    Assignment and Assumption of Leases
8.6.5                    Assignment and Assumption of Contracts and Warranties
8.6.6                    Assignment of Intangibles
8.6.8                    Bill of Sale
8.6.10                   Bring-Down Certificate
9.26                     SEC Compliance Representation Letter

Exhibits

A                        Legal Description of Property
A-1                      Descriptive List of the Property 





                                       23




                                     Schedule 2.1

                          EARNEST MONEY ESCROW INSTRUCTIONS


               (earnest money escrow instructions previously executed) 















                                     Schedule 5.1

                                 DISCLOSURE SCHEDULE

      A 1996 Environmental Audits was  prepared by ATC Environmental, Inc. 
for the Property.  This Audit has been made available to Purchaser for 
inspection and copying, and, each of the Seller warranties of Section 5.1.8 
and its subparagraphs are qualified and limited by any matters disclosed in 
such Audit.














                                    Schedule 5.1.5

                                  Service Contracts

A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING 







                                   Schedule 5.1.10

                                      Rent Roll






                                   Schedule 5.1.12

            Future Leasing Commissions, Tenant Improvements and Free Rent


1.   If Tozour Trane, the tenant of 741 First Avenue, does not exercise certain
     termination options, commissions may become due to The Flynn Company in the
     amounts of $20,260.50 and $16,109.00 on May 1, 2000 and May 1, 2003,
     respectively. 

                                       
                                Schedule 6.2

                           TENANT ESTOPPEL LETTER
                                           
                                                       __________ __, 1998



Brandywine Realty Trust
Newtown Square Corporate Campus
16 Campus Boulevard
Newtown Square, PA  19073                                      

Attention:  Gerard H. Sweeney, 
     President and Chief Executive Officer


NationsBank, N.A.,
Real Estate Banking
8300 Greensboro Drive, Suite 300
McLean, VA 22102

Attention: Gary P.F. Carr

               Re:  Lease from ________, for Suite ____, located
                    at [BUILDING ADDRESS]  
                    [CITY/TOWNSHIP], Pennsylvania (the 
"Property")

To Whom it May Concern:

     The undersigned is the holder of the tenant's interest under the lease 
described on Exhibit A attached hereto (the "Lease") demising a portion of 
the Property (the "Leased Premises").  We understand that Brandywine Realty 
Trust, its assignee or nominee ("Brandywine") intends to acquire the 
Property, and that NationsBank, N.A., as Agent for the parties listed on 
Schedule 1 attached hereto ("Lender") may be the holder of a first mortgage 
on the Property, and that Brandywine and Lender require this certification 
from us.

     Accordingly, we hereby certify to Brandywine and Lender as follows:

     1.     The Lease is in full force and effect and has not been modified,
amended or supplemented in any way, except as follows (Insert dates of all
modifications, amendments, or supplements; if none, write "None"):____________
______________________________________________________________________________.



     2.     There are no other representations, warranties, agreements,
concessions, commitments, or other understandings between the undersigned and
the Landlord regarding the Property other than as set forth in the Lease or
paragraph 1 above.

     3.     The landlord under the Lease has completed and delivered, and the
undersigned has accepted, the Leased Premises in the condition required by the
Lease and the term of the Lease commenced on _________.  The Leased Premises
consists of approximately ___________ square feet.  The undersigned has taken
possession of and is occupying the Leased Premises on a rent-paying basis and
the monthly base rent payable thereunder is $_________, payable in advance.  All
improvements and work required under the Lease to be made by the landlord
thereunder and all facilities required under the Lease to be furnished to the
Leased Premises have been completed to the satisfaction of the undersigned,
except as follows (Insert description of any improvements and work to be
completed by the landlord under the Lease; if none, write "None"):
_____________________________.

     4.     The fixed expiration date set forth in the Lease, excluding renewals
and extensions, is ________________.  The undersigned neither has any option or
right to purchase the Property or any portion thereof nor does the undersigned
have any right or option to terminate the Lease or any of its obligations
thereunder in advance of the scheduled termination date of the Lease as noted
above, except as follows (Insert description of any purchase rights or options,
and/or any early termination rights; if none, write "None"):
_______________________________.
     
     5.  All rents, additional rents and other sums due and payable under the 
Lease have been paid in full and no rents, additional rents or other sums 
payable under the Lease have been paid for more than one (1) month in advance 
of the due dates thereof.

     6.  The landlord under the Lease is not in default under any of the
requirements, provisions, terms, conditions or covenants of the Lease to be
performed or complied with by the landlord under the Lease, and no event has
occurred or situation exists which would, with the passage of time and/or the
giving of notice, constitute a default or an event of default by the landlord
under the Lease.

     7.  The undersigned is not in default under any of the requirements, 
provisions, terms, conditions, or covenants of the Lease to be performed or 
complied with by the undersigned, and no event has occurred or situation 
exists which would, with the passage of time and/or the giving of notice, 
constitute a default or an event of default by the undersigned under the 
Lease.

                                       2


     8.   The undersigned has received no notice from any governmental 
authority or other person or party claiming a violation of, or requiring 
compliance with, any Federal, State or local statute, ordinance, rule, 
regulation or other requirement of law, for environmental contamination at 
the Leased Premises, to the best knowledge of the undersigned no hazardous, 
toxic or polluting substances or wastes have been generated, treated, 
manufactured, stored, refined, used, handled, transported, released, spilled, 
disposed of or deposited by Tenant on, in or under the Leased Premises.

     9.  Neither the undersigned nor the landlord under the Lease has commenced
any action or given or received any notice for the purpose of terminating the
Lease.

     10.  There are no existing defenses, offsets, claims, or credits against
the payment of rent or the performance of the undersigned's obligations under
the Lease.

     11.  The undersigned has paid to the landlord under the Lease a security
deposit of $____________. 

                                          Very truly yours,

                              


                                          By:
                                              ---------------------------------
                                             Name:
                                             Title:


                                       3


 
                                      Exhibit A
                               (Description of Lease)  








                                       4



                                Schedule 8.6.1

                                 Form of Deed

SPECIAL WARRANTY DEED:

THIS INDENTURE made this ____ day of ____________, 1998,

BETWEEN   RREEF MIDAMERICA/EAST FUND-IV, A CALIFORNIA GROUP TRUST
                    (hereinafter called the Grantor/s), of the one part and

          _____________________
                    (hereinafter called the Grantee/s), of the second part,

WITNESSETH That in consideration of Ten and No/100 Dollars ($10.00) in hand
paid, the receipt whereof is hereby acknowledged, the said Grantor/s do/does
hereby grant, bargain, sell and convey unto the said Grantee/s, his/her/their
successors and /or assigns,

ALL THAT CERTAIN real estate, situated in the County of Montgomery and
Commonwealth of Pennsylvania known and described on the attached Exhibit A
"Legal Description," attached hereto an hereby made a part hereof.

TOGETHER with all and singular the buildings, improvements, ways, streets,
alleys, driveways, passages, waters, water-courses, rights, liberties,
privileges, hereditaments and appurtenances whatsoever unto the hereby granted
premises belonging, or in anywise appertaining, and the reversions and
remainders, rents, issues and profits thereof; and all the estate, right, title,
interest, use, trust, property, possession, claim and demand whatsoever of
Grantor as well at law as in equity, of, in, and to the same.

TO HAVE AND TO HOLD the said lot or piece of ground described with the buildings
and improvements thereon erected, hereditaments and premises hereby granted, or
mentioned and intended so to be, with the appurtenances unto the said Grantee,
and its successors and assigns to and for the only proper use and behoof of the
said Grantee, and its successors and assigns, forever.

AND the said Grantor/s do/does hereby covenant to and with the said Grantee/s
that he/she/they, the said Grantor/s, his/her/their successors and/or assigns,
SHALL AND WILL warrant specially and forever defend the herein above described
premises, with the hereditaments and appurtenances, unto the said Grantor/s and
against every other person lawfully claiming or who shall hereafter claim the
same or any part thereof, by, from and under his/her/their successors and/or
assigns or any of them, subject to validly and legally existing encumbrances of
record.

IN WITNESS WHEREOF, the said Grantor/s has/have caused these presents to be duly
executed, the day and year first above written.




ATTEST:                                RREEF MIDAMERICA/EAST FUND-IV,      
                                       a California group trust            
                                                                           
By:___________________________         By:  RREEF America L.L.C., a        
                                       Delaware limited liability company, 
                                       its investment advisor              
                                                                           
                                            By:_______________________     
                                               Authorized Representative   


[Add Pennsylvania address certification] 





                                       2



STATE OF _____________________)
                              )    SS.
COUNTY OF ____________________)


     I,_______________________________________________, a notary public in and
for said County, in the State aforesaid, DO HEREBY CERTIFY that ______________
__________________ and ___________________________, personally known to me to be
the ______________________ and ______________ of RREEF MIDAMERICA/EAST FUND-IV,
a California group trust, and personally known to me to be the same persons
whose names are subscribed to the foregoing instrument, appeared before me this
day in person and acknowledged that as such __________________________ and 
_________________, they signed and delivered the said instrument as their free 
and voluntary act, and as the free and voluntary act and deed of said trust, 
for the uses and purposes therein set forth.

     GIVEN under my hand and official seal this ____ day of _________________, 
1998.




                                             ----------------------------------
                                             Notary Public


Commission expires 
                   ------------------------------------------------------------




                                       3



                                   EXHIBIT A


                               Legal Description



                                       
                               Schedule 8.6.2
     
                              FIRPTA CERTIFICATE
 
     Section 1445 of the Internal Revenue Code provides that a transferee of a
U.S. real property interest must withhold tax if the transferor is a foreign
person.  To inform the transferee that withholding of tax is not required upon
the disposition of a U.S. real property interest by __________________________
__________________________________________, a _______________________ ("Seller")
hereby certifies the following:

1.   Seller is not a foreign corporation, foreign partnership, foreign trust or
     foreign estate (as those terms are defined in the Internal Revenue Code and
     Income Tax Regulations);

2.   Seller's U.S. employer identification number is 94-6566801; and

3.   Seller's principal place of business is 101 California Street, 26th 
     floor, San Francisco, CA 94111-5853

     Seller understands that this certification may be disclosed to the 
Internal Revenue Service by transferee and that any false statement contained 
herein could be punished by fine, imprisonment, or both.

     Under penalties of perjury I declare that I have examined this 
certification and to the best of my knowledge and belief it is true, correct 
and complete, and I further declare that I have authority to sign this 
document on behalf of Seller. 

                                       ________________________________________

                                       ________________________________________



                                       By: ____________________________________
                                            Authorized Representative
 

Subscribed and sworn to
before me this ____ day of
______, 1998. 


______________________________
Notary Public 

                                       


                                Schedule 8.6.4

                    ASSIGNMENT AND ASSUMPTION OF LEASES


          THIS ASSIGNMENT AND ASSUMPTION OF LEASES (the "Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between _________________________________________,
a Delaware corporation, ("Assignor") and ________________, a _______________
("Assignee").

     A.   Assignor is the lessor under certain leases executed with respect 
to that certain real property and improvements thereon known as 
____________________, _______________________, and more particularly 
described in Exhibit "A" attached hereto (the "Property"), which leases are 
described in Exhibit B attached hereto (the "Leases").

     B.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase the Property from Assignor and 
Assignor agreed to sell the Property to Assignee, on the terms and conditions 
contained therein.

     C.   Assignor desires to assign its interest as lessor in the Leases to
Assignee, and Assignee desires to accept the assignment thereof, on the terms
and conditions below.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date") [SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the Leases except rents and other sums due Assignor first accruing on or
prior to the Conveyance Date, and, effective as of the day following the
Conveyance Date,  Assignee hereby accepts such assignment.

     2.   Assignor hereby assumes full responsibility for all obligations and
defaults of landlord under the Leases accruing prior to and including the
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee
harmless from any claims, liabilities or costs (including reasonable attorneys'
fees) arising from Assignor's failure to perform said obligations, provided that
Assignee makes a claim hereunder on or before one (1) year following the
Conveyance Date.

     3.   Assignee hereby assumes full responsibility for all obligations of
landlord under the Leases accruing after the Conveyance Date and Assignee hereby
agrees to defend, indemnify and hold Assignor harmless from any claims,
liabilities or costs (including reasonable attorneys' fees) arising from
Assignee's failure to perform said obligations.  Without limiting the generality




of the foregoing, Assignee assumes full responsibility for the free rent, unpaid
tenant improvement allowances and leasing commissions under the Leases as listed
on Exhibit C.

     4.   This Assignment shall be governed by the laws of the Commonwealth of
Pennsylvania.

     5.   This Assignment may be executed in counterparts.

     6.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers.  


    IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment and
Assumption of Leases.


ASSIGNOR:                              ASSIGNEE:                        
                                                                        
_______________________________        _______________________________  

_______________________________        _______________________________  
                                                                        
                                                                        
By:____________________________        By:____________________________  
     Authorized Representative                                          
                                       Title:_________________________  
                                                                        
Dated:_________________________        Dated:_________________________  






                                       2


 
                                   EXHIBIT A

                               Legal Description















                                       3

                                       
                                   EXHIBIT B

                               Existing Leases

                         (rent roll to be attached) 







                                       4



                                   EXHIBIT C

      Free Rent, Tenant Improvement Allowances and Leasing Commissions 










                                       5



                                Schedule 8.6.5

           ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES

          THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES (the
"Assignment") dated as the dates of execution set forth below, but effective as
of the Conveyance Date (as herein defined), is between
_____________________________ ___________________________________, ("Assignor")
and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a condition
precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date")[SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the following:

     2.   Assignor hereby grants, transfers and assigns to Assignee all the
right, title and interest of Assignor in and to the following:

          (a) All contracts listed on Exhibit B attached hereto.

          (b) All presently effective and assignable warranties, guaranties,
representations or covenants given to or made in favor of Assignor or Assignor's
affiliates in connection with the acquisition, development, construction,
maintenance, repair, renovation or inspection of the Property.

     The foregoing are collectively referred to herein as the "Contracts."

     3.   Assignor hereby assumes full responsibility for all obligations and
defaults of Assignor under the Contracts accruing to and including the
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee
harmless from any claims, liabilities or costs (including reasonable attorneys'
fees) arising from Assignor's failure to perform said obligations, provided that
Assignee makes a claim hereunder on or before one (1) year following the
Conveyance Date.




     4.   Assignee hereby assumes full responsibility for all obligations of 
owner of the Property under the Contracts accruing after the Conveyance Date 
and Assignee hereby agrees to defend, indemnify and hold Assignor harmless 
from any claims, liabilities or costs (including reasonable attorneys' fees) 
arising from Assignee's failure to perform said obligations.

     5.   This Assignment shall be governed by the laws of the Commonwealth of
Pennsylvania.

     6.   This Assignment may be executed in counterparts.

     7.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers.  

      IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment
and Assumption of Contracts and Warranties.


ASSIGNOR:                              ASSIGNEE:                        
                                                                        
_______________________________        _______________________________  

_______________________________        _______________________________  
                                                                        
                                                                        
By:____________________________        By:____________________________  
     Authorized Representative                                          
                                       Title:_________________________  
                                                                        
Dated:_________________________        Dated:_________________________  
              
 
 
                                       2


 
                                   EXHIBIT A

                               Legal Description








                                       3


                                   EXHIBIT B

                                   Contracts


A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING 


                                       4



                                Schedule 8.6.6

                           ASSIGNMENT OF INTANGIBLES

          THIS ASSIGNMENT AND ASSUMPTION OF INTANGIBLES ("Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between ______________________________________, 
("Assignor") and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a condition
precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:


     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date")[SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the following:

          (i)  All licenses, permits, certificates of occupancy, approvals,
     dedications, subdivision maps or plats and entitlements issued, approved or
     granted by federal, state or municipal authorities or otherwise in
     connection with the Property and its renovation, construction, use,
     maintenance, repair, leasing and operation; and all licenses, consents,
     easements, rights of way and approvals required from private parties to
     make use of utilities, to insure pedestrian ingress and egress to the
     Property and to insure continued use of any vaults under public rights-of-
     way presently used in the operation of the Property.  

          (ii)  any trade style or trade name used in connection with the
     Property; and,

          (iii)  all correspondence with the tenants under tenant leases, all
     booklets and manuals relating to the maintenance and operation of the
     Property. 

     The foregoing are collectively referred to herein as the "Intangibles".  

     2.   Assignor agrees to assume full responsibility for its obligations
under the Intangibles accruing on or prior to the Conveyance Date  and Assignor
agrees to defend, indemnify and hold Assignee harmless from any claims,
liabilities or costs arising from 




Assignor's failure to perform said obligations, provided that Assignee makes 
a claim hereunder on or before one (1) year following the Conveyance Date.

     3.   Assignee assumes full responsibility for all obligations of the owner
of the property accruing under the Intangibles from the day after the Conveyance
Date  and Assignee agrees to defend, indemnify and hold Assignor and its
predecessors in title harmless from all claims, liabilities or costs arising
from Assignee's failure to perform said obligations.

     4.   This instrument may be executed in counterparts.

     5.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers

     IN WITNESS WHEREOF, the parties have executed this Assignment of
Intangibles. 


ASSIGNOR:                              ASSIGNEE:                      
                                                                      
_______________________                ______________________________ 

_____________________________,         ______________________________ 
                                                                      
                                                                      
By:                                    By:                            
     Authorized Representative                                        
                                       Title:                         
                                                                      
Dated:                                 Dated:                         








                                       2


                                   EXHIBIT A

                               Legal Description




                                       3

 
                                 Schedule 8.6.8

                                  BILL OF SALE


     ________________________________________________________________________ 
("Seller"), in consideration of Ten and No/100 Dollars and other good and 
valuable consideration, the receipt and sufficiency of which is hereby 
acknowledged, hereby sells, transfers, assigns and sets over unto 
__________________ ("Purchaser"), all of its right, title and interest in and 
to any and all personal property, which personal property is owned by Seller 
and located on the real estate legally described on Exhibit A attached hereto 
(the "Personal Property"), including, but not limited to, the Personal 
Property listed on Exhibit B.

     Seller hereby represents and warrants to Purchaser that Seller is the
absolute owner of the Personal Property free and clear of all liens, charges and
encumbrances, and that Seller has full right, power and authority to sell the
Personal Property and to make this Bill of Sale. All warranties of quality,
fitness and merchantability are hereby excluded. 

     The obligations of Seller contained herein are intended to be binding only
on the property of the Seller and shall not be personally binding upon, nor
shall any resort be had to the private properties of, any of the investment
managers of Seller, or any general partners thereof, or any employees or agents
of the  investment managers


    IN WITNESS WHEREOF, Seller has executed this Bill of Sale as of the ___ day
of _______, 1998, but effective on the date on which the Property is conveyed by
Seller to Purchaser.
 


                                       ______________________________


                                       ______________________________ 
                                       

                                       By:___________________________
                                            Authorized Representative 

 




STATE OF _________       )
                         )  SS
COUNTY OF ________       )


          The undersigned, a Notary Public in and for said County in the State
aforesaid, DOES HEREBY CERTIFY that ________________, authorized representative
of _________________________________________________________________, who is
personally known to me to be the same person whose name is subscribed to the
foregoing instrument as such authorized representative, appeared before me this
day in person and acknowledged that __he, being duly authorized, signed, sealed
and delivered the said instrument as h___ free and voluntary act, and as the
free and voluntary acts of said corporation, for the uses and purposes therein
set forth.

          GIVEN under my hand and Notarial Seal this _____ day of
______________, 1998.


                                        _______________________
                                          Notary Public


My Commission Expires:

____________________, 19___








                                       2

 
                                   EXHIBIT A

                               Legal Description






                                       3


                                   EXHIBIT B

                               Personal Property

                                     (none) 








                                Schedule 8.6.10

                         SELLER'S CLOSING CERTIFICATE


     THIS CLOSING CERTIFICATE is made as of the ___ day of ________________, 
1998, by and between ______________________________________________________  
("Seller"), to and in favor of ____________________________________________, 
a __________ ("Purchaser"), under and pursuant to that certain Agreement of 
Purchase and Sale by and between Seller and __________, with an Effective 
Date as defined therein (the "Agreement"), for the purchase and sale of that 
certain Property situated in the _________, _______ County, ____________ (as 
defined in the Agreement).

     Pursuant to Paragraphs 5.3 and 8.6.10 of the Agreement and except as
disclosed on Exhibit A attached hereto and made a part hereof, Seller hereby
reconfirms, remakes and rewarrants to Purchaser as of the date hereof each of
the representations, warranties and covenants given by Seller contained in
Paragraph 5.1 of the Agreement in the same manner as such representations,
warranties and covenants were given in the Agreement, each of which is
incorporated herein and made a part hereof by this reference.  Except as
modified hereby, Seller hereby confirms that each of said representations,
warranties and covenants are true and accurate in all material respect as of the
date hereof.  Seller's reconfirming, remaking and rewarranting of its
representations, warranties and covenants is subject to the limitations set
forth in Paragraph  5.3 of the Agreement.

     The obligations of Seller contained herein are intended to be binding only
on the property of the Seller and shall not be personally binding upon, nor
shall any resort be had to the private properties of, any of the investment
managers of Seller, or any general partners thereof, or any employees or agents
of the  investment managers

     IN WITNESS WHEREOF, Seller has executed this Closing Certificate on the day
and year first above written, but effective upon the date on which the Property
is conveyed by Seller to Purchaser.

SELLER:

_____________________________

_____________________________


By: _____________________________
     Authorized Signatory

                                       


                                   EXHIBIT A

                                   Disclosure
 










                                 Schedule 9.7.2

New Lease Approval Form

Property: ___________________________________________________________________

Tenant: _____________________________________________________________________

Square Feet: ________________________________________________________________

Location: ___________________________

Anticipated Lease Commencement: _____________________________________________

Anticipated Rent Commencement: ______________________________________________

Term: _______________________________________________________________________

FREE RENT: __________________________________________________________________

Rental Rate:             Period            PSF Rate         Annual Income

                   ________________    ________________    ________________

                   ________________    ________________    ________________

                   ________________    ________________    ________________


Note: Above rental rates do not include Tenant Electric

Tenant Improvement Allowance: PSF ______________ Amount ___________________ T.I.

Mechanism: ___________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


OPTIONS:           ________________    ________________    ________________

                   ________________    ________________    ________________

                   ________________    ________________    ________________
               

Initial Commission:

     BROKER                %                            Amount

__________________  _______________  _________________________________________

__________________  _______________  _________________________________________

 
Broker Future Entitlements: __________________________________________________

______________________________________________________________________________

______________________________________________________________________________

                                                         
Other Comments: ______________________________________________________________

______________________________________________________________________________

______________________________________________________________________________
                                                                     

Approved By: ________________

                                       

                                 Schedule 9.26

                     SEC COMPLIANCE REPRESENTATION LETTER

(Accountant Name & Address)

Dear Sirs:

     In connection with your audit of the statement of revenues and certain
expenses of the Property situated in the City of King of Prussia, Montgomery
County, Pennsylvania, commonly known as 741 First Avenue (the "Property") for
the year ended December 31, 199__ (the "Operating Statement"), prepared for the
purpose of complying with the rules and regulations of the Securities and
Exchange Commission, the undersigned ("Seller") makes the following limited,
qualified and specific representations, which are true to Seller's knowledge (as
such phrase is hereinafter defined):

     1.   Seller has made available or caused its property manager to make
          available to Brandywine Operating Partnership, L.P.  ("Buyer"), or its
          representatives, Seller's financial records and files in Seller's
          actual possession pertaining to the operation of the Property (such
          records and files being collectively referred to herein as the
          "Files").

     2.   Except as disclosed in the Files, Seller is not aware of any events or
          transactions which have occurred since December 31, 199_ and prior to
          the date hereof that would have a material effect on the Operating
          Statement for the period then ended.

     3.   We recognize that, as the Owner of the Property, we are responsible
          for directing the fair presentation of the Operating Statement.  We
          believe the Operating Statement is fairly presented in conformity with
          generally accepted accounting principals.

     As used in this letter, the words "Seller's knowledge" shall be deemed to
mean, and shall be limited to, the actual (as distinguished from implied,
imputed or constructive) knowledge of Joseph S. Cappelletti and Barbara
Gillentine without such person having any obligation to make an independent
inquiry or investigation.

     Notwithstanding any provision in this letter to the contrary, Seller is
executing this letter solely as an accommodation to and at the request of Buyer
and, except to the extent Seller is liable to Buyer for representations and
warranties expressly set forth in that certain Agreement of Purchase and Sale,
dated _________ 1998, by and between Seller and Buyer (the "Sale Agreement"),
this letter is subject to the condition that Seller shall not be liable or
responsible to Buyer, any parent, subsidiary or other affiliate of Buyer, or any
officer, director, employee, agent, representative, shareholder, partner or
principal of Buyer or any such parent, subsidiary or other affiliate thereof or
any accountant or other professionals engaged by or on behalf of any of the
foregoing, including, without limitation, [accountant] (all of the foregoing
being collectively referred to herein as the "Buyer Parties"), as a result of
the fact that any of the statements made herein are in any way inaccurate,
untrue or incorrect.  By the acceptance of this letter, except for rights and
remedies that Buyer may have under the Sale Agreement with respect to
representations and warranties expressly set forth in the Sale Agreement, each
of the Buyer Parties shall be deemed to have waived any and all rights and
remedies that any of them may have against Seller, whether at law or in equity,
as a result of the fact that any of the statements made herein are in any way
inaccurate, untrue or incorrect.

                                       4


     Seller has executed this letter for the limited purposes set forth herein,
and for the use of [accountant] only.  No other parties may rely on the
statements set forth herein.

                                       Very truly yours,

                                       RREEF MIDAMERICA/EAST FUND-IV, 
                                       a California group trust

                                       By:  RREEF America L.L.C.,
                                            a Delaware limited liability company

                                       By:_______________________________
                                       Name:   Joseph S. Cappelletti
                                       Title:  Its Authorized Representative


                                       By:  __________________________________
                                       Name:   Barbara J. Gillentine
                                       Title:  Its Authorized Representative



                                       5



                                      EXHIBIT A

                            Legal Description of Property