CORNERSTONE PROPERTIES INC
SC 13D, 1996-11-27
REAL ESTATE
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D


                    Under the Securities Exchange Act of 1934
                             (Amendment No. _______)


                          Cornerstone Properties, Inc.
                          ----------------------------
                                (Name of Issuer)

                           Common Stock, No Par Value
                           --------------------------
                         (Title of Class of Securities)

                              -------------------
                                 (CUSIP Number)

                    Robert F. Dow, 2800 One Atlantic Center,
            1201 West Peachtree Street, Atlanta, Georgia 30309-3450
            -------------------------------------------------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                                     11/7/96
                                     -------

             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [  ].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

382661.1

<PAGE>


                                                                     Page 2 of 5



===============================================================================
1   Name of Reporting Person  S.S. or I.R.S. Identification 
    No. of Above Person
                       Hexalon Real Estate, Inc.
- -------------------------------------------------------------------------------
2   Check the Appropriate Box if a Member of a Group                    (a)[  ]
                                                                        (b)[  ]
- ------------------------------------------------------------------------------- 
3   SEC Use Only

- -------------------------------------------------------------------------------
4   Source of Funds
                                   00
- -------------------------------------------------------------------------------
5   Check Box if Disclosure of Legal Proceedings is Required 
    Pursuant to Items 2(d) or 2(E)                                      [  ]

- -------------------------------------------------------------------------------
6   Citizenship or Place of Organization
                                   United States
- -------------------------------------------------------------------------------
    7  Sole Voting Power
                             4,586,210*
- -------------------------------------------------------------------------------
    8  Shared Voting Power
                                     0
- -------------------------------------------------------------------------------
    9  Sole Dispositive Power
                              4,586,210*
- -------------------------------------------------------------------------------
    10  Shared Dispositive Power
                                      0

- -------------------------------------------------------------------------------
11  Aggregate Amount Beneficially Owned by Each Reporting Person
                               4,586,210*
- -------------------------------------------------------------------------------
12  Check Box if the Aggregate Amount in Row (11) Excludes Certain 
                              Shares                                    [  ]
- -------------------------------------------------------------------------------
13  Percent of Class Represented by Amount in Row (11)
                              18.2 percent
- -------------------------------------------------------------------------------
14  Type of Reporting Person
                                     CO
===============================================================================
SEE INSTRUCTIONS BEFORE FILLING OUT


*        Includes  shares of Common Stock issuable upon conversion of the shares
         of 8%  Cumulative  Convertible  Preferred  Stock,  Series A held by the
         reporting person.

382661.1

<PAGE>


                                                                     Page 3 of 5



Item 1.  SECURITY AND ISSUER

         This  statement   relates  to  the  Common  Stock,  no  par  value,  of
Cornerstone  Properties,   Inc.,  a  Nevada  corporation  (the  "Company").  The
principal executive office of the Company is located at:

                  126 East 56th Street
                  New York, NY 10022

Item 2.  IDENTITY AND BACKGROUND

     1.  (a)   Hexalon Real Estate,  Inc., a Delaware  corporation ("HRE"), is a
               person filing this statement.

         (b)   950  East  Paces  Ferry  Road,  Suite  2275,   Atlanta,   Georgia
               30326-1119.

         (c)   Real estate investment trust.

         (d)   None.

         (e)   None.

         (f)   United States.


Item 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         On November 7, 1996, HRE acquired  458,621 shares (the "Shares") of the
Company's 8% Cumulative  Convertible  Preferred Stock, Series A, in exchange for
HRE's common stock of Frick  Building,  Inc. a Delaware  corporation  ("Frick"),
which was merged  with and into  CStone-Pittsburgh  Trust,  a Maryland  business
trust and  wholly-owned  subsidiary of the Company (the "Sub"),  pursuant to the
terms of that certain  Agreement and Plan of Merger ("Merger  Agreement")  dated
November 7, 1996, among the Company, the Sub, Frick, and HRE, a copy of which is
filed herewith as Exhibit 99.1.


Item 4.  PURPOSE OF TRANSACTION

         The  reporting  person  currently   intends  to  hold  the  shares  for
investment.

         (a)   None.

         (b)   See Item 3.

         (c)   None.

         (d)   Pursuant  to the  terms of that  certain  Stockholders  Agreement
               ("Stockholder Agreement") dated as of November 7, 1996, among the
               Company  and HRE,  a copy of which is filed  herewith  as Exhibit
               99.2, HRE may designate a director nominee, and the Company shall
               recommend  the  election  of such  nominee to the  holders of the
               Company's  common stock.  HRE has designated  Cecil Conlee as its
               director nominee.


382661.1

<PAGE>


                                                                     Page 4 of 5



         (e)-(j) None.


Item 5.  INTEREST IN SECURITIES OF THE ISSUER

         (a)-(b) See Items 7-13 of the cover page.

         (c)   See  Item 3. No other  transactions  in the  Company's  Preferred
               Stock  have been  effected  by the  person  named in Item 2 above
               within the last sixty days.

         (d)   None.

         (e)   Not Applicable.

Item 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        SECURITIES OF THE ISSUER

         See Item 4(d). The Stockholders Agreement includes, among other things,
(i) a restriction  on the transfer of the Shares without prior written notice to
the Company;  (ii) demand and piggyback  registration  rights for the holders of
the Shares; (iii) a requirement that the holders of the Shares execute a lock-up
agreement in the event of an underwritten  public  offering.  The Certificate of
Designations  of the  Preferred  Stock,  a copy of which is  filed  herewith  as
Exhibit 99.3,  includes (i) a right by HRE to convert each Share into ten shares
of the Company's common stock,  with such conversion ratio subject to adjustment
for dividends paid on the common stock, stock splits, reclassifications,  or the
issuance of additional  common shares or warrants and (ii) a put right by HRE to
cause the  Company to redeem the  Shares,  at stated  value plus any accrued but
unpaid dividends, at any time after January 1, 2001, but only if the Company has
not completed a public offering with net proceeds to the Company of at least $75
million.

Item 7.  MATERIAL TO BE FILED AS EXHIBITS

         99.1  Agreement and Plan of Merger dated November 7, 1996

         99.2  Stockholders Agreement dated November 7, 1996.

         99.3  Certificate  of  Designations,  Voting  Powers,  Preferences  and
               Relative,  Participating,  Optional and Other Special  Rights and
               Qualifications,  Limitations  or  Restrictions  of 8%  Cumulative
               Convertible Preferred Stock, Series A of Cornerstone  Properties,
               Inc.

382661.1

<PAGE>
                                                                     Page 5 of 5


Signature.

         After reasonable inquiry each of the undersigned  certifies that to the
best of his knowledge and belief the  information set forth in this statement is
true, complete and correct.

HEXALON REAL ESTATE, INC.


By:James W. Smith
   James W. Smith, its Vice President

382661.1






               AGREEMENT AND PLAN OF MERGER,  dated as of November 7, 1996 (this
"Agreement"),  among  Cornerstone  Properties  Inc., a Nevada  corporation  (the
"Parent"), CStone-Pittsburgh Trust, a Maryland business trust and a wholly owned
subsidiary of the Parent ("Sub"),  Frick Building,  Inc., a Delaware corporation
(the "Company"), and Hexalon Real Estate, Inc., a Delaware corporation, the sole
stockholder of the Company (the "Stockholder").

               WHEREAS,  the Board of Trustees of Sub and the respective  Boards
of Directors of the Parent, the Company and the Stockholder each have determined
that it is in the best interests of their respective  companies and stockholders
for Sub and the  Company to merge upon the terms and  subject to the  conditions
set forth  herein  (the  "Merger")  and the  Parent,  Sub,  the  Company and the
Stockholder  have,  by duly  adopted  resolutions,  approved  and  adopted  this
Agreement; and

               WHEREAS,  to  induce  the  Parent  and  Sub to  enter  into  this
Agreement,  the Stockholder  has agreed to enter into a stockholders'  agreement
(the  "Stockholders'  Agreement"),  in the form set  forth as  Exhibit A hereto,
simultaneously with the closing of the Merger;

               NOW,   THEREFORE,   in  consideration  of  the   representations,
warranties,  covenants and agreements set forth herein, the parties hereto agree
as follows:


                             ARTICLE I. DEFINITIONS

               Section  1.01.  Definitions.  As  used  in  this  Agreement,  the
following terms shall have the following meanings:

                    "Account"   means  that  certain   account  no.   8801721955
               established at SunTrust Bank in the name of Frick Building, Inc.

                    "Basic    Agreements"   means   this   Agreement   and   the
               Stockholders' Agreement.

                    "Capital Stock" means,  with respect to any Person,  any and
               all  shares,   interests,   participation  or  other  equivalents
               (however designated) of such Person's capital stock and all joint
               venture interests (however designated) whether now outstanding or
               issued after the Closing Date, including, without limitation, all
               common stock and all preferred stock.

                    "Capitalized  Lease"  means,  as applied to the Parent,  any
               lease  of  property   (whether  real,   personal  or  mixed)  the
               discounted  present value of the rental obligations of the Parent
               as lessee under which, in conformity with GAAP, is required to be
               or is capitalized on the balance sheet of that Person.


384488.1

<PAGE>



                    "Certificate of Merger" has the meaning specified in Section
               2.02.

                    "Charter"  means the  Certificate  of  Incorporation  of the
               Parent, as amended or restated from time to time.

                    "Closing" has the meaning specified in Section 2.02.

                    "Closing Date" has the meaning specified in Section 2.02.

                    "Closing  Statement"  has the meaning  specified  in Section
               3.03(a)(x).

                    "Commission" means the United States Securities and Exchange
               Commission.

                    "Common Stock" means the common stock of the Parent, without
               par value.

                    "Company Note" means the Demand Promissory Note, dated as of
               July 31,  1989,  of the Company to  Stockholder  in the  original
               principal amount of $36,000,000.

                    "Company Shares" has the meaning specified in Section 2.06.

                    "Contract Rights" means any and all rights of the Company in
               and to the Contracts.

                    "Contracts"   means  all   service,   maintenance,   supply,
               construction,  utility and  management  contracts  affecting  the
               construction, use, ownership, maintenance and/or operation of the
               Property  (including  contracts  for the  construction  of tenant
               improvements).

                    "Conversion   Shares"   means  the  Common  Stock  or  other
               securities  issued upon  conversion  of the 8%  Preferred  Stock,
               Series A.

                    "Currency  Agreement" means any foreign  exchange  contract,
               currency swap agreement or other similar agreement or arrangement
               designed to protect the Parent against  fluctuations  in currency
               values.

                    "Debt"  of  the   Parent   means,   at  any  date   (without
               duplication):  (i) all  obligations  of the Parent  for  borrowed
               money;  (ii) all  obligations  of the Parent  evidenced by bonds,
               debentures,  notes  or  other  similar  instruments;   (iii)  all
               obligations  of the  Parent in  respect  of  letters  of  credit,
               bankers'   acceptances   or   other   similar   instruments   (or
               reimbursement   obligations  with  respect  thereto);   (iv)  all
               obligations  of the Parent to pay the deferred  purchase price of
               property or services

384488.1


                                       -2-

<PAGE>



               (but  excluding  trade  accounts  payable or accrued  liabilities
               arising  in  the  ordinary  course  of  business  which  are  not
               overdue);  (v) all  obligations  of the  Parent as  lessee  under
               Capitalized Leases; (vi) all obligations of the Parent in respect
               of  performance  bonds or other  similar  instruments;  (vii) all
               obligations  of others of the types  referred  to in clauses  (i)
               through (vi), (viii) and (ix) of this paragraph secured by a Lien
               on any asset of the Parent, whether or not any such obligation is
               assumed by the Parent, provided that, for purposes of determining
               the  amount  of any Debt of the  type  described  in this  clause
               (vii),  if recourse  with respect to such Debt is limited to such
               asset,  the  amount of such  Debt  shall be  limited  to the Fair
               Market Value of such assets;  (viii) all obligations of others of
               the types  referred to in clauses  (i)  through  (vi) and (ix) of
               this paragraph  which are  guaranteed by the Parent;  and (ix) to
               the extent not otherwise  included,  obligations  under  Currency
               Agreements and Interest Rate Agreements.

                    "Delaware Law" means the Delaware General Corporation Law.

                    "Effective Time" has the meaning specified in Section 2.02.

                    "8%  Preferred  Stock" means the 8%  Cumulative  Convertible
               Preferred  Stock of the Parent,  without par value,  to be issued
               hereafter.

                    "8% Preferred  Stock Series A" has the meaning  specified in
               Section 2.06.

                    "Environmental  Laws" has the meaning  specified  in Section
               3.05(a)(vii).

                    "Executive  Summary"  has the meaning  specified  in Section
               5.01(i).

                    "GAAP" means generally accepted accounting principles in the
               United   States  as  in   effect  at  the  time  any   particular
               determination is made.

                    "Hazardous  Materials" has the meaning  specified in Section
               3.05(a)(vii).

                    "Improvements"  means all buildings  and other  improvements
               located on or affixed to the Land, including, without limitation,
               a 21-story  office  building with ground floor retail space known
               as  the  Frick  Building,  Pittsburgh,  Pennsylvania,  containing
               approximately  341,421  square feet of net rentable area, and any
               and all utility, plumbing, electrical, heating,  air-conditioning
               and ventilation lines, systems and boilers.

                    "Incurrence"  means  the  issuance,  incurrence,   creation,
               assumption  or in any other manner  becoming  liable with respect
               to, or the extension of the maturity or

384488.1


                                       -3-

<PAGE>



               mandatory  redemption  date of, or becoming  responsible  for the
               payment  of,  any  Debt,  Preferred  Stock or Lien.  "Incur"  and
               "Incurred" shall have correlative meanings.

                    "Intangible  Rights" means all right,  title and interest of
               the Company, if any, in and to intangible and mixed property used
               in  connection  with or relating to the Real Property or Personal
               Property,    including   without   limitation   all   third-party
               representations,   warranties,  guarantees,  indemnities,  bonds,
               approvals,  licenses,  applications,  permits,  plans,  drawings,
               specifications,  surveys,  maps,  engineering  reports  and other
               technical  descriptions,  environmental  reports, trade names and
               trademarks,  telephone numbers and similar  property,  other than
               the Contract Rights and the Leases.

                    "Interest   Rate   Agreements"   means  any  interest   rate
               protection agreement, interest rate future, interest rate option,
               interest  rate swap,  interest  rate cap or other  interest  rate
               hedge  agreement,  to or under  which the  Parent is a party or a
               beneficiary   on  the  date  hereof  or  becomes  a  party  or  a
               beneficiary hereafter.

                    "Land"  means  that  certain  parcel of land in  Pittsburgh,
               Pennsylvania more particularly  described on Exhibit R-A attached
               hereto,  together  with  all  rights,  easements,  and  interests
               appurtenant thereto.

                    "Leases" means all of the leases,  occupancy  agreements and
               licenses  of  space  in the  Real  Property,  together  with  any
               amendments  of any of the  foregoing  or any related  agreements,
               including brokerage agreements and guaranties.

                    "Lien" means any pledge,  mortgage,  lien, charge,  security
               interest or encumbrance of any kind.

                    "Maryland   Law"   means   Title  8  of   Corporations   and
               Associations Annoted Code of Maryland.

                    "Material  Adverse Effect" means for any entity,  a material
               adverse  effect  on  the  business,  operations,   properties  or
               condition  (financial  or  otherwise)  of  such  entity  and  its
               Subsidiaries, taken as a whole.

                    "1934 Act" shall mean the United States Securities  Exchange
               Act of 1934,  as  amended,  and,  unless  the  context  indicates
               otherwise,   the  rules  and   regulations   of  the   Commission
               thereunder, all as the same shall be in effect from time to time.

                    "1933 Act" shall mean the United  States  Securities  Act of
               1933, as amended,  and, unless the context  indicates  otherwise,
               the rules and  regulations of the Commission  thereunder,  all as
               the same shall be in effect from time to time.

384488.1


                                       -4-

<PAGE>




                    "Person"  means  an  individual,  a  partnership,   a  joint
               venture,  a corporation,  an association,  a trust, an individual
               retirement account or any other entity or organization, including
               a government or any department or agency thereof.

                    "Personal  Property" means all right,  title and interest of
               the  Company  in and to the  tangible  personal  property  of the
               Company  listed in Exhibit  R-B and any other  tangible  personal
               property of the Company  used in  connection  with the  operation
               and/or  maintenance  of  the  Real  Property,  including  without
               limitation  all  furniture,   fixtures,   equipment,   machinery,
               furnishings, carpets, drapes, blinds and mini-blinds, service and
               maintenance  equipment,   tools,  signs,   telephones  and  other
               communication equipment, intercom equipment and systems.

                    "Property" means the Real Property,  the Personal  Property,
               the Intangible Rights, the Leases, and the Contract Rights.

                    "Real Property" means the Land and the Improvements.

                    "Rent Roll" has the meaning specified in Section 3.03(a)(i).

                    "7%  Preferred  Stock" means the 7%  Cumulative  Convertible
               Preferred Stock of the Parent, without par value.

                    "Stockholder   Knowledge   Individuals"   has  the   meaning
               specified in Section 3.05(b).

                    "Subsidiary"   means,   as  to  any  entity,   any  company,
               corporation   or   joint   venture   of  which  at  the  time  of
               determination such entity, directly and/or indirectly through one
               or more  Subsidiaries,  owns,  or one or more other  Subsidiaries
               own,  more than 50% of the Voting Stock or such entity  controls,
               or one or more other  Subsidiaries  control,  the  composition of
               more than 50% of the board of directors or  comparable  governing
               body thereof.

                    "Surviving Corporation" has the meaning specified in Section
               2.01.

                    "Taxes" mean all taxes, however  denominated,  including any
               interest,  penalties  or other  additions  to tax that may become
               payable in respect thereof, imposed by any federal,  territorial,
               state,  local or foreign  government  or any agency or  political
               subdivision  of any such  government,  which taxes shall include,
               without  limiting the generality of the foregoing,  all income or
               profits  taxes  (including,  but not limited to,  federal  income
               taxes and state income taxes), real property gains taxes, payroll
               and employee  withholding  taxes,  unemployment  insurance taxes,
               social  security  (or  similar)  taxes,  sales and use taxes,  ad
               valorem taxes, excise taxes,

384488.1


                                       -5-

<PAGE>



               franchise  taxes,  gross receipts taxes,  business license taxes,
               occupation taxes, real and personal property taxes,  stamp taxes,
               environmental  taxes,  transfer  taxes,  workers'   compensation,
               Pension   Benefit   Guaranty   Corporation   premiums  and  other
               governmental  charges,  alternative  or add-on  minimum taxes and
               other  obligations  of the same or of a similar  nature to any of
               the  foregoing,  whether  disputed or not,  which the  applicable
               party is required to pay, withhold or collect.

                    "Tenant  Estoppels"  has the  meaning  specified  in Section
               3.03(a)(v).

                    "Title Company" means Lawyers Title Insurance Company.

                    "Voting Stock" means, with respect to any Person, securities
               of any class or classes of Capital Stock of such Person entitling
               the holders  thereof  (whether at all times or only so long as no
               senior  class  of  stock  has  voting  power  by  reason  of  any
               contingency)  to vote in the  election of members of the board of
               directors  or other  governing  body of such  Person but does not
               include  Capital  Stock having the right to vote in such election
               solely upon the happening of a contingency  unless and until such
               contingency  has occurred,  and then only so long as such Capital
               Stock has voting rights with respect thereto.


                             ARTICLE II. THE MERGER

               Section  2.01.  The  Merger.  Upon the terms and  subject  to the
conditions  set forth in Section  3.03 and  Article IV, and in  accordance  with
Maryland Law and Delaware Law, at the Effective Time the Company shall be merged
with and into Sub. As a result of the Merger, the separate  corporate  existence
of the Company shall cease and Sub shall  continue as the surviving  corporation
of the Merger (the "Surviving Corporation").

               Section 2.02. Effective Time; Closing. As promptly as practicable
after the satisfaction or, if permissible, waiver of the conditions set forth in
Article  IV, the parties  hereto  shall  cause the Merger to be  consummated  by
filing this Agreement or a certificate of merger (the  "Certificate  of Merger")
with the  Secretaries  of State of  Maryland  and  Delaware,  in such form as is
required  by, and  executed  in  accordance  with the  relevant  provisions  of,
Maryland  Law and  Delaware  Law (the date and time of the later of such filings
being the "Effective  Time").  Prior to such filings, a closing shall be held at
the offices of Shearman & Sterling,  599 Lexington  Avenue,  New York,  New York
10022,  on November 7, 1996,  or such other place and date as the parties  shall
agree, for the purpose of confirming the satisfaction or waiver, as the case may
be, of the  conditions  set forth in Section  3.03 and Article IV (such  closing
being called the "Closing" and such date being called the "Closing Date").


384488.1


                                       -6-

<PAGE>



               Section 2.03.  Effect of the Merger.  At the Effective  Time, the
effect of the  Merger  shall be as  provided  in the  applicable  provisions  of
Maryland Law and Delaware Law. Without limiting the generality of the foregoing,
and subject thereto, at the Effective Time all the property, rights, privileges,
powers and  franchises  of the Sub and the Company  shall vest in the  Surviving
Corporation, and all debts, liabilities, obligations, restrictions, disabilities
and  duties  of the  Company  and  Sub  shall  become  the  debts,  liabilities,
obligations, restrictions, disabilities and duties of the Surviving Corporation.

               Section  2.04.  Certificate  of  Formation;  Bylaws.  (a)  At the
Effective Time, the Certificate of Formation of the Surviving  Corporation shall
be as set forth in Exhibit B, until  thereafter  amended as  provided by law and
such Certificate of Formation.

               (b) The  Bylaws  of Sub,  as in effect  immediately  prior to the
Effective  Time,  shall  be  the  Bylaws  of  the  Surviving  Corporation  until
thereafter  amended as provided by law, the Certificate of  Incorporation of the
Surviving Corporation and such Bylaws.

               Section  2.05.  Directors  and  Officers.  The  trustees  of  Sub
immediately  prior to the  Effective  Time shall be the initial  trustees of the
Surviving  Corporation,  each  to hold  office  in  accordance  with  the  Trust
Declaration and Bylaws of the Surviving Corporation, and the officers of the Sub
immediately  prior to the  Effective  Time shall be the initial  officers of the
Surviving  Corporation,  in each case until their respective successors are duly
elected or appointed and qualified.

               Section  2.06.  Conversion of Company  Shares.  All the shares of
common  stock of the  Company  (the  "Company  Shares")  issued and  outstanding
immediately prior to the Effective Time (all of which are and, immediately prior
to the Effective Time will be, owned by the Stockholder) shall, by virtue of the
Merger and without any action on the part of the holder thereof, be converted in
their  entirety into and represent the right to receive,  upon  surrender to the
Parent of the certificates  formerly  representing  the Company Shares,  458,621
shares of 8% Cumulative  Convertible Preferred Stock Series A, without par value
(the "8% Preferred Stock Series A"), of the Parent having the terms set forth in
the Certificate of Designations attached hereto as Exhibit C.

               Section  2.07.  Conversion  of Sub  Common  Stock.  Each share of
common  stock,  par  value  $1.00  per  share,  of Sub  issued  and  outstanding
immediately  prior to the  Effective  Time  shall,  by virtue of the  Merger and
without  any action on the part of the holder  thereof,  be  converted  into and
exchangeable for one share of common stock of the Surviving Corporation.



384488.1


                                       -7-

<PAGE>



                   ARTICLE III. CERTAIN MATTERS PERTAINING TO
                           REAL ESTATE AND THE COMPANY

               Section  3.01.  Delivery of Materials  for Review.  In connection
with the  transactions  contemplated  hereby,  prior to the  Closing  Date,  the
Company  delivered to the Parent or otherwise  made  available to the Parent for
its review the  documents  and other  materials  set forth on the Document  List
attached hereto as Exhibit R-C.

               Section  3.02.  As-Is  Clause.  As a material  inducement  to the
Stockholder  and the  Company  to  execute  this  Agreement,  the Parent and Sub
acknowledge,  represent and warrant that,  except as expressly  provided in this
Agreement,  (i) the Parent and Sub will have fully  examined and  inspected  the
Property, including, without limitation, the construction, operation and leasing
of the Property,  together with such other  documents and materials with respect
to the  Property  which the  Parent and Sub deem  necessary  or  appropriate  in
connection with their investigation and examination of the Property,  including,
without limitation, all of the documents made available to the Parent or the Sub
at the offices of the Company's  property manager,  (ii) the Parent and Sub will
have accepted the foregoing and the physical condition, value,  presence/absence
of Hazardous Materials,  financing status, use, leasing,  operation, tax status,
income and expenses of the  Property,  (iii) the Property will be subject to all
applicable  laws and "AS IS" and "WHERE IS" and with all  faults  and,  upon the
Closing,  Sub shall  assume  responsibility  for the  physical  condition of the
Property  and (iv) the Parent and Sub will have decided to purchase the Property
solely on the basis of their own independent investigation.  Except as expressly
set forth herein,  neither the Stockholder nor the Company has made,  makes, and
has  authorized  anyone  else to make any  representation  as to the  present or
future  physical  condition,  value,  presence/absence  of hazardous  materials,
financing status,  leasing,  operation,  use, tax status, income and expenses or
any other matter or thing  pertaining  to the  Property,  and the Parent and Sub
acknowledge  that no such  representation  or warranty has been made and that in
entering into this Agreement they do not rely on any  representation or warranty
other than those expressly set forth in this Agreement.  EXCEPT AS EXPRESSLY SET
FORTH IN THIS  AGREEMENT,  NEITHER THE  STOCKHOLDER  NOR THE  COMPANY  MAKES ANY
WARRANTY OR  REPRESENTATION,  EXPRESS OR IMPLIED OR ARISING BY OPERATION OF LAW,
INCLUDING,   WITHOUT  LIMITATION,  ANY  WARRANTY  OF  CONDITION,   HABITABILITY,
MERCHANTABILITY,  OR  FITNESS  FOR A  PARTICULAR  PURPOSE OF THE  PROPERTY.  The
provisions of this Section 3.02 shall survive the Closing.

               Section 3.03. Closing Deliveries.  (a) The Company's  Deliveries.
The Company shall  deliver or cause to be delivered  the following  documents to
Sub at the Closing:


384488.1


                                       -8-

<PAGE>



               (i) The original,  signed Leases (or copies thereof  certified by
          the  Stockholder  if  originals  are  not  available)  as  well as the
          Company's tenant lease files,  and a rent roll and delinquency  report
          for the current month ("Rent Roll")  certified by the  Stockholder  as
          being true and  complete in all  material  respects,  to  Stockholders
          knowledge.

               (ii) A certification duly executed by the Stockholder in the form
          attached  hereto as Exhibit  R-D,  stating  that the  Company is not a
          "foreign  person"  within the meaning of Section  1445 of the Internal
          Revenue Code of 1986, as amended.

               (iii) Originals (or certified copies thereof if originals are not
          available) of the Contracts.

               (iv)  Originals  of  all  books  and  records  in  the  Company's
          possession pertaining to the operation and management of the Property;
          provided,  however,  that the  Stockholder may keep copies of all such
          books and records.

               (v) Estoppel  certificates from tenants of the Property occupying
          eighty  percent (80%) of the rentable  square footage of the Property,
          dated no  earlier  than  twenty  (20) days prior to the  Closing  Date
          ("Tenant  Estoppels")  in the form  attached  hereto  as  Exhibit  R-E
          (provided that if any Lease specifies the form of estoppel certificate
          which the tenant thereunder is obligated to deliver,  such form may be
          delivered in lieu of the form attached hereto as Exhibit R-E).

               (vi) Evidence  reasonably  satisfactory  to Sub and Title Company
          that all real estate taxes, sewer and water rates and charges, special
          assessments and  betterments,  and any utility charges the non-payment
          of which could  result in a lien upon the  Property,  either have been
          paid  or are  included  in  the  Closing  Statement  for  purposes  of
          apportionment.

               (vii) Any and all keys, and lock and safe combinations respecting
          the Improvements.

               (viii)  If the  Contracts  listed  in  Exhibit  R-C  include  any
          Contract  for the  construction  of tenant  improvements,  evidence of
          payment by the Company of all amounts incurred  thereunder through the
          Closing Date.

               (ix)  Such  other  instruments  as  the  Parent  or the  Sub  may
          reasonably request.

               (b)  Satisfaction  of  Deliveries.  Except  with  respect  to any
representations, warranties or covenants of the parties that survive the Closing
in accordance  with Section 

384488.1


                                       -9-

<PAGE>

7.01,  the  occurrence  of  the  Closing  shall  be  deemed  full  and  complete
satisfaction  of the  deliveries  required  pursuant to this Section 3.03 or the
waiver  thereof by the party for whose  benefit  the  delivery is required to be
made.

               Section  3.04.  Closing  Costs and  Prorations.  At the  Closing,
closing  costs  shall be paid and  prorations  made as  between  the Sub and the
Stockholder with respect to the Property in accordance with this Section 3.04.

               (a) Closing Costs.  The  Stockholder and the Parent each agree to
cooperate  with each other in making all  filings  required  to confirm  that no
state  or  local  real  estate  transfer  tax  is  due in  connection  with  the
consummation of the transactions  contemplated.  In the event any such tax shall
be imposed,  the  Stockholder and the Parent shall each pay one-half of the same
when due, plus any interest and penalties.  No filing or communication  with any
tax official or authority  shall be made by either party  without the consent of
the other party.  Each party shall bear its own costs and expenses in connection
with all such  filings.  The Sub shall pay the title  insurance  premium for the
owner's title insurance policy issued at the Closing to the Sub by Title Company
and any costs for any survey obtained by the Sub.

               (b)  Prorations.  The  following  prorations  shall be made as of
11:59 p.m. the day prior to the Effective Time:

                    (i) Taxes.  Real and personal property taxes and general and
               special  assessments shall be prorated on the basis of the fiscal
               year for such taxes and  assessments.  If the Closing  Date shall
               occur  before the real  property tax rate for such fiscal year is
               fixed,  the  apportionment of taxes shall be made on the basis of
               the taxes assessed for the preceding  fiscal year. After the real
               property taxes are finally fixed for the fiscal year in which the
               Closing Date occurs,  the Parent and the Stockholder shall make a
               recalculation of the  apportionment of such taxes, and the Parent
               or the Stockholder, as the case may be, shall make an appropriate
               payment  to the  other  based on such  recalculation.  After  the
               Closing  Date,  Sub shall  have the right to  control  and pursue
               exclusively  without the participation of the Stockholder any and
               all tax reduction proceedings relating to the Property;  provided
               that if taxes  increase  as a  result  of said  proceedings,  the
               Stockholder  shall  have no  liability  for such  increases,  and
               provided  that  Sub  shall  cooperate  with  the  Stockholder  in
               pursuing any tax reduction  proceedings  for tax year 1996.  With
               respect to 1996 taxes,  the parties shall prorate on the basis of
               the reduced  assessment  in effect on  November 4, 1996,  and the
               Stockholder  shall be entitled to the entire 1996 refund, if any.
               Subject to the immediately  preceding sentence, to the extent any
               real estate tax refund is  received on or after the Closing  Date
               by any party  hereto,  the amount of the net proceeds of such tax
               refund shall be prorated to but not  including  the Closing Date,
               if, as and when such proceeds

384488.1


                                      -10-

<PAGE>



               are paid by the  applicable  governmental  taxing  authority  (it
               being  understood that, to the extent any tenant leasing space in
               the Real  Property  shall be  entitled to any portion of such tax
               abatement,  such portion  shall be turned over to Sub to remit to
               such tenant and shall be deducted from any tax refund proceeds in
               connection with calculating the net proceeds thereof).

                    (ii)  Rents.   Prepaid  rent,   nondelinquent   base  rents,
               additional rents in the nature of operating  expense  recoveries,
               electricity  recoveries,  and tax reimbursements under the Leases
               shall be prorated.  Rents  collected  after the Closing Date from
               tenants whose rental was  delinquent on the Closing Date shall be
               deemed  to  apply  first  to  current  rental  due at the time of
               payment and second to the rentals  which were  delinquent  on the
               Closing  Date.   Unpaid  and  delinquent   rents,  to  which  the
               Stockholder is entitled,  shall be turned over to the Stockholder
               if  collected by the Sub after the Closing Date within 30 days of
               collection,   less  any  reasonable   third-party   out-of-pocket
               collection costs actually  incurred by the Sub. The Sub agrees to
               use good faith  efforts to attempt to collect such rents.  On the
               Closing  Date,  the Sub  shall be  entitled  to a credit  for any
               tenant security  deposits and interest  thereon,  if any, and any
               other  amounts due tenants  pursuant  to such  security  deposits
               unless such security deposits have been previously applied by the
               Company. In the event that any additional rent or the calculation
               thereof  is  subject  to  adjustment  pursuant  to the  terms and
               provisions of any Lease (e.g., year-end adjustments to escalation
               charges,  tenant audits,  and the like), then after the amount of
               such additional  rent is finally  determined by the Parent (which
               determination  shall be reasonably  made), the parties shall make
               the proper  adjustments  so that the  proration  will be accurate
               based upon the actual amount of such  additional  rent  collected
               for the period in question, and payment shall be made promptly to
               the Sub or the  Stockholder,  whichever  may be  entitled to such
               payment,  by the other  party  for the  purpose  of  making  such
               adjustment.

                    (iii) Utilities. Charges and assessments for sewer and water
               and  other  utilities,   including  charges  for  consumption  of
               electricity,  steam and gas shall be  apportioned  by the Sub and
               the Stockholder.

                    (iv)  Adjustment  of  Contracts.  Except as  provided in (v)
               below, payments required or received under all Contracts shall be
               apportioned by the Sub and the Stockholder.

                    (v) Leasing  Costs.  The Parent shall be entitled to payment
               at  Closing  for all  costs  and  expenses  required  to be paid,
               whether before or after the Closing, in respect of Leases entered
               into prior to the Closing for (A) tenant improvement construction
               contracts (except with respect to the

384488.1


                                      -11-

<PAGE>



               payment for certain tenant  improvement  work required to be made
               in 1999  under the Meyer,  Darragh & Buckler  lease for which the
               Sub  shall  be  solely   responsible),   (B)  tenant  improvement
               allowances  to  tenants  and (C)  brokerage  commissions,  except
               commissions which may become due in connection with the extension
               or  renewal  of any  Lease on or  after  the  Closing  Date or in
               connection with the exercise after the Closing Date by any tenant
               of any  expansion  or  extension  option  contained in any of the
               Leases.

                    (vi) Other.  Any other items of income and expense  shall be
               prorated between the Sub and the Stockholder.

               (c) Payment of  Apportionment.  Any net credit payable by the Sub
to the Stockholder  (as a dividend in its capacity as former  shareholder of the
Company  pursuant to resolution of the Board of Directors of the Company,  dated
November 4, 1996) or by the  Stockholder to the Sub as a result of the foregoing
prorations shall be paid within five (5) business days after the Closing Date by
wire transfer of immediately available funds.

               (d) Post-Closing  Cooperation.  After the Closing, the Parent and
the  Stockholder  shall  cooperate  with  each  other,  and  shall  cause  their
respective  property  managers for the  Property to  cooperate  with each other,
including,  without  limitation,  making  available  books and  records  for the
Property, in order to respond to any tenant inquiry concerning,  challenge to or
audit of, any operating  expense or similar  additional  rent or rent escalation
item.  To the extent that any  adjustment  or proration  required  hereunder was
based on estimates at the time of the Closing,  the parties  shall  readjust and
re-prorate  based  upon  final  numbers,  when  available,  and make  payment as
appropriate based upon such readjustment and re-proration.

               (e) A closing statement (the "Closing Statement")  reflecting the
adjustments  made at the Closing and  described  in Section 3.04 hereof shall be
executed and delivered by  Stockholder  and Parent within five (5) Business Days
after the Effective Time.

               (f) Survival.  The  provisions of this Section 3.04 shall survive
the Closing, provided, however, that the Stockholder and the Parent agree to use
reasonable efforts to finalize all prorations on or before the first anniversary
of the Closing Date.

               Section 3.05. Stockholder's  Representations and Warranties.  (a)
The Stockholder hereby makes the following representations and warranties to the
Parent and Sub as of the Closing Date:


384488.1


                                      -12-

<PAGE>



                    (i) Delivery of Written Materials.  Exhibit R-C includes all
               of the Leases and  Contracts  relating to the  Property,  and the
               Company has delivered to Sub true,  accurate and complete  copies
               of all of the Leases and the  Contracts  and all other  documents
               and reports  included  in Exhibit  R-C.  Sub hereby  acknowledges
               receipt  of each of the Leases  and  Contracts  listed in Exhibit
               R-C,  but  said  acknowledgement  shall  in no way  diminish  the
               foregoing representation and warranty of the Stockholder.

                    (ii) Other  Agreements.  On the Closing Date, (A) there will
               be no Contracts  other than the Contracts  listed in Exhibit R-C,
               and (B) there will be no Leases  other than the Leases  listed in
               Exhibit R-C.

                    (iii)  No   Conflict.   The   execution,   delivery  of  and
               consummation of the  transactions  contemplated by this Agreement
               are not  prohibited  by, and will not conflict  with,  constitute
               grounds  for   termination   of,  or  result  in  the  breach  of
               organizational  documents of the Company or the Stockholder,  any
               of  the  Leases  or  the  Contracts  or any  other  agreement  or
               instrument  to which  the  Company  is now a party  or  otherwise
               subject,  except for such conflicts or breaches of such Contracts
               or other  agreements  or  instruments  as would not  constitute a
               Material Adverse Effect either individually or in the aggregate.

                    (iv)  Leases.  (A) No rent has been  paid by any  tenant  or
               occupant  of the  Property  more than thirty (30) days in advance
               (except  as  adjusted  in  the  Closing  Statement),  (B)  to the
               Stockholder's knowledge, neither any tenant nor the Company is in
               default in the performance of any material covenant, agreement or
               condition  contained  in any  of  the  Leases,  (C)  neither  the
               Stockholder nor the Company has received  written notice from any
               tenant regarding  pending or threatened  material offsets against
               rent or for any material  monetary or material  claim against the
               Company and no future rent  concessions  have been created  which
               are not disclosed in the Leases,  the Rent Roll, Tenant Estoppels
               or the Exhibits hereto, (D) to the Stockholder's  knowledge,  any
               and all construction  and  improvements  that were required to be
               performed  by  the  Company  under  any  Lease  have  been  fully
               completed  and accepted by each  tenant,  except under the Leases
               and the Contracts designated with an asterisk in Exhibit R-C, and
               all leasing  commissions  payable on account of any of the Leases
               have been  fully  paid,  except  those  which may  become  due in
               connection  with the  extension  or  renewal  of any  Lease or in
               connection  with the  exercise by any tenant of any  expansion or
               extension  option  contained  in any of  the  Leases,  (E) to the
               Stockholder's  knowledge, the Leases are in full force and effect
               and (F)  attached  hereto as Exhibit  R-H is a true and  complete
               list of all security  deposits  posted under the Leases  together
               with interest,  if any,  accrued thereon to the Closing Date. The
               representations   and   warranties   made  in   this   Subsection
               3.05(a)(iv)

384488.1


                                      -13-

<PAGE>



               shall be deemed withdrawn as to each Lease for which Sub receives
               a Tenant Estoppel on or before the Closing.

                    (v) Notices.  To the  Stockholder's  knowledge,  neither the
               Stockholder  nor the  Company  has  received  written  notice  or
               citation:

                         (1)  from  any  federal,  state,  county  or  municipal
                    authority  alleging  any  fire,  health,  safety,   building
                    pollution,  environmental,  zoning or other violation of any
                    law,  regulation,  permit,  order or directive in respect of
                    the  Property  or any  part  thereof,  which  has  not  been
                    entirely corrected;

                         (2) from any  insurance  company or bonding  company of
                    any  defects or  inadequacies  in the  Property  or any part
                    thereof,   which  would  materially   adversely  affect  the
                    insurability of the same or of any termination or threatened
                    termination of any policy of insurance or bond; or

                         (3) from any  governmental  authority with respect to a
                    proposed  eminent domain taking of all or any portion of the
                    Property.

                    (vi) Violation of Law. To the Stockholder's  knowledge,  all
               governmental  approvals  required  for  the  current  use  of the
               Property  have been issued and are  currently  in effect  without
               violation, to Stockholder's  knowledge, the Property is not under
               investigation  for  failure to comply  with any  statutes,  laws,
               ordinances,  rules, regulations,  orders or directives of any and
               all governmental  agencies  pertaining to the use or occupancy of
               the Property, and, to the Stockholder's  knowledge,  the Property
               is in  compliance  with,  and not in  violation  in any  material
               respect of, any applicable  statutes,  laws,  ordinances,  rules,
               regulations,  orders or directives;  provided,  however, that the
               Stockholder  makes  no  representation  herein  with  respect  to
               compliance with the Americans with  Disabilities Act or any rule,
               regulation or interpretation promulgated thereunder.

                    (vii) Hazardous Materials.  To the Stockholder's  knowledge,
               except as disclosed in (A) the  Environmental  Assessment  Report
               dated July 1989,  prepared by Schneider  Engineers  for the Frick
               Building,  and  (B) the  Environmental  Assessment  Report  dated
               November 5, 1996,  prepared by IVI  Environmental,  Inc.  for the
               Frick Building,  there are no Hazardous Materials at the Property
               except  for  ordinary  cleaning,  landscaping,  maintenance,  and
               office  supplies  consistent  with the use of the  Property as an
               office  building  which are used and  stored in  compliance  with
               applicable   Environmental   Laws,   and  to  the   Stockholder's
               knowledge,  neither  the  Company  nor  any  tenant  of the  Real
               Property  during the Company's  ownership  thereof has previously
               used, manufactured,  generated,  treated, stored, disposed of, or
               released  any  Hazardous  Materials  on or under the  Property or
               transported any

384488.1


                                      -14-

<PAGE>



               Hazardous  Materials  over  the  Property  in  violation  of  any
               applicable  Environmental  Laws.  As used  herein,  (a) the  term
               "Environmental  Laws" shall  include,  but not be limited to, the
               Comprehensive Environmental Response,  Compensation and Liability
               Act of 1980,  as amended,  42 U.S.C.  Section  9601 et seq.,  the
               Resource Conservation and Recovery Act, 42 U.S.C. Section 6901 et
               seq.,  the  Hazardous  Materials  Transportation  Act,  49 U.S.C.
               Section 1801 et seq., the Federal Water Pollution Control Act, 33
               U.S.C. Section 1251 et seq., the Clean Air Act, 42 U.S.C. Section
               7401 et seq.,  the Toxic  Substances  Control Act, 15 U.S.C.  ss.
               2601,  the Refuse  Act, 33 U.S.C.  Section  407 et seq.,  and any
               other  applicable  similar  state,  federal,   county,  regional,
               municipal or local law,  statute,  ordinance,  rule or regulation
               governing the control of substances dangerous to public health or
               safety,  as same may be  amended  from time to time;  and (b) the
               term  "Hazardous  Materials"  shall include but not be limited to
               asbestos-containing    materials,    polychlorinated   biphenyls,
               flammable materials, explosives, radioactive materials, petroleum
               products and those  materials  or  substances  now or  heretofore
               defined  as  "hazardous   substances,"   "hazardous   materials,"
               "hazardous   waste,"   "toxic   substances,"   or  other  similar
               designations under the Environmental Laws.

                    (viii) Legal Proceedings. Except as set forth in Exhibit R-G
               attached  hereto,  there are no  actions,  suits or  proceedings,
               pending,  or, to the Stockholder's  knowledge,  threatened before
               any court,  commission,  agency or other administrative authority
               against,  or affecting the Company or the  Property.  The Company
               has not suffered or confessed  any judgment in or before any such
               court,  commission,  agency  or  other  administrative  authority
               against which remains unsatisfied.

                    (ix) No Employees. The Company has never employed any person
               as an employee.

                    (x) Leasing Commissions.  Except as set forth on Exhibit R-F
               hereto,  no person  is  entitled  to any  leasing  commission  in
               connection  with the  extension  or  renewal  of any  Lease or in
               connection  with the  exercise by any tenant of any  expansion or
               extension  option  contained  in any of the  Leases.  Neither the
               Company nor the Property is subject to any  "protection  list" or
               similar  obligation  with  respect to the  future  leasing of the
               Property except as set forth on Exhibit R-F hereto.

                    (xi) Assets and Liabilities. Other than the Property and the
               Account, the Company has no assets. Other than the Contracts, the
               Company  Note,  the Leases and the matters  disclosed in Exhibits
               R-E,  R-F, R-G and R-H, the Company has no  liabilities,  whether
               current, contingent or other.

                    (xii) The Account.  (A) There is  $40,000,000  on deposit in
               the Account, (B) the Account is not subject to any pledge, claim,
               offset or defense and (C) the Company has good and clear title to
               the Account.

384488.1


                                      -15-

<PAGE>




                    (xiii)  No  Liens;  Acknowledgement.  The  Company  owns all
               Personal Property free and clear of all Liens except as set forth
               in Exhibit R-H. The Company makes no  representation  or warranty
               as to the ownership of either the bust of Henry Clay Frick or the
               bronze lion sculptures located in the lobby of the Improvements.

          (b) The Stockholder's  Knowledge.  Any and all uses of the phrases "to
Stockholder's  knowledge" or other references to the Stockholder's  knowledge in
this Agreement shall mean the actual,  present,  conscious knowledge of James W.
Smith,  III and Lisa Saylor (the  "Stockholder  Knowledge  Individuals") as to a
fact at the time given. The Parent and Sub acknowledge that, for purposes of the
representations  and warranties set forth in this  Agreement,  such  individuals
have not performed and are not obligated to perform any  investigation or review
of any files in the possession of the Stockholder or the Company with respect to
the subject  matter  addressed  in the  representations  and  warranties  of the
Stockholder  set  forth  in  this  Agreement.  The  actual,  present,  conscious
knowledge  of any  other  individual  or  entity  shall  not be  imputed  to the
Stockholder Knowledge Individuals.

          Section 3.06.  Brokerage  Commission.  The  Stockholder and the Parent
each  warrant to the other party that its sole  contact  with the other party or
the Property  regarding this  transaction has been directly with the other party
or with Lazard Freres & Co., LLC, Cushman & Wakefield,  Inc. or Galbreath-Middle
Atlantic.  The Parent shall be solely  responsible  for any  investment  fees or
commissions,  payable  to Lazard  Freres  in  connection  with the  transactions
contemplated by this Agreement.  The Stockholder shall be solely responsible for
any  investment  fees or  commission  payable to Cushman &  Wakefield,  Inc. and
Galbreath-Middle  Atlantic in connection with the  transactions  contemplated by
this  Agreement.  The Parent and the  Stockholder  further warrant to each other
that no other  broker or finder can properly  claim a right to a  commission  or
finder's fee based upon contacts  between the claimant and the warranting  party
with respect to the other party or the Property.  The Parent and the Stockholder
shall  indemnify,  defend and hold the other party harmless from and against any
loss, cost or expense,  including, but not limited to, attorneys' fees and court
costs,  resulting from any claim for a fee or commission by any broker or finder
in  connection  with  the  Property  and  this  Agreement   resulting  from  the
indemnifying  party's  actions.  The  foregoing  indemnities  shall  survive the
Closing.

          Section 3.07.  Company Dividend.  The parties hereto  acknowledge that
the Board of  Directors  of the Company on November 4, 1996  declared a dividend
payable to shareholder of record of the Company on November 5, 1996.

          Section  3.08.  Transfer  of  Company  Note.   Immediately  after  the
Effective  Time, the  Stockholder  shall assign and transfer the Company Note to
the Parent or its designee.



384488.1


                                      -16-

<PAGE>



                             ARTICLE IV. CONDITIONS

          Section 4.01. Conditions to the Merger. The respective  obligations of
all parties to consummate the transactions  contemplated by this Agreement shall
be  subject  to the  fulfillment,  at or prior  to the  Effective  Time,  of the
following conditions:

          (a)  Stockholder   Approval.   This  Agreement  and  the  transactions
     contemplated  hereby shall have been  approved and adopted by the requisite
     affirmative  vote of the  stockholder of the Company to the extent required
     by Delaware Law and the Certificate of Incorporation of the Company.

          (b) No Order. No statute,  rule,  regulation,  order, executive order,
     decree or  injunction  shall have been  enacted,  entered,  promulgated  or
     enforced by any court or governmental  authority which is in effect and has
     the effect of prohibiting  the  consummation of the Merger (it being agreed
     that each of the parties hereto shall use their  respective best efforts to
     have any such injunction lifted).

          Section 4.02.  Conditions to the Obligations of the  Stockholder.  The
obligations  of the  Stockholder  under this  Agreement  shall be subject to the
satisfaction  or waiver of the  following  conditions  on or before the  Closing
Date:

          (a) Opinions of Parent's Counsel.  The Stockholder shall have received
     from  Shearman &  Sterling,  counsel  for the Parent and the Sub,  and from
     Lionel,  Sawyer &  Collins,  Nevada  counsel  for the  Parent  and the Sub,
     opinions dated the Closing Date in form and substance  satisfactory  to the
     Stockholder.

          (b)  Representations   and  Warranties   Complete  and  Correct.   The
     representations  and  warranties  of the Parent  contained  in Section 5.01
     hereof shall have been complete and correct in all material  respects as of
     the Closing Date.

          (c) Compliance  with this  Agreement.  The Parent shall have performed
     and complied in all material  respects with all  agreements,  covenants and
     conditions  contained herein which are required to be performed or complied
     with by it on or before the Closing Date.

          (d)  Officers'  Certificate.  The  Stockholder  shall have  received a
     certificate, dated the Closing Date and signed by the President or any Vice
     President and attested by the Secretary of the Parent,  certifying that the
     conditions  set forth in Sections  4.02(b) and 4.02(c) are satisfied on and
     as of such date.

          (e)  Consents;  Permits.  The Parent shall have received all consents,
     permits,  approvals and other authorizations that may be required from, and
     made all

384488.1


                                      -17-

<PAGE>



     such  filings  and  declarations  that may be  required  with,  any  person
     pursuant to any law, statute, regulation or rule (federal, state, local and
     foreign), or pursuant to any agreement, order or decree by which the Parent
     or any of  its  assets  is  bound,  in  connection  with  the  transactions
     contemplated by this Agreement,  except for (a) notice  requirements  which
     may be fulfilled subsequent to the Closing Date and (b) consents,  permits,
     approvals,  authorizations,  filings and declarations the failure to obtain
     or to undertake (i) could not have a Material  Adverse Effect on the Parent
     or (ii) could not adversely affect the ability of the Parent to perform its
     obligations  under  the  Basic  Agreements  or any  agreement  executed  in
     accordance therewith.

          (f)  Stockholders'  Agreement.  The  Parent  shall have  executed  and
     delivered the Stockholders' Agreement.

          (g) Rent  Rolls.  Rent rolls of the Parent,  certified  as of a recent
     date by the  Treasurer  of the  Parent as being  true and  complete  in all
     material respects to his knowledge.

          (h) Supporting  Documents.  The Stockholder and its counsel shall have
     received copies of the following documents:

               (i)  (A)  the  Charter,  certified  as of a  recent  date  by the
          appropriate  authority of the Parent's  jurisdiction of incorporation,
          and (B) a certificate of such  authority  dated as of a recent date as
          to the due incorporation and good standing of the Parent,  the payment
          of all  franchise  and  excise  taxes by the Parent  and  listing  all
          documents of the Parent on file with said authority;

               (ii) a certificate of the Secretary or an Assistant  Secretary of
          the Parent dated the Closing Date and  certifying:  (A) that  attached
          thereto is a true and complete  copy of the Bylaws of the Parent as in
          effect on the date of such certification; (B) that attached thereto is
          a true and complete  copy of all  resolutions  adopted by the Board of
          Directors  or a committee  thereof or the  stockholders  of the Parent
          authorizing  the  execution,  delivery  and  performance  of the Basic
          Agreements,  the issuance,  sale and delivery of the Preferred  Shares
          and the reservation,  issuance and delivery of the Conversion  Shares,
          and that all such resolutions are in full force and effect and are all
          the   resolutions   adopted  in  connection   with  the   transactions
          contemplated  by the Basic  Agreements;  (C) that the  Charter has not
          been  amended  since  the date of the last  amendment  or  restatement
          referred to in the  certificate  delivered  pursuant to clause  (i)(B)
          above; (D) that the Bylaws have not been amended since the date of the
          last amendment  referred to in the certificate  delivered  pursuant to
          clause (ii)(A) above; and (E) the incumbency and specimen signature of
          each officer of the Parent executing any Basic Agreement, the

384488.1


                                      -18-

<PAGE>



          stock   certificates   representing   the  Preferred  Shares  and  any
          agreement,  certificate or instrument furnished pursuant hereto, and a
          certification  by another  officer of the Parent as to the  incumbency
          and signature of the officer  signing the  certificate  referred to in
          this clause (ii)(E); and

               (iii) such additional  supporting documents and other information
          with  respect  to the  operations  and  affairs  of the  Parent as the
          Stockholder may reasonably request.

          Section  4.03.  Conditions  to  the  Obligations  of the  Parent.  The
obligations  of  the  Parent  under  this  Agreement  shall  be  subject  to the
satisfaction  or waiver of the  following  conditions  on or before the  Closing
Date:

          (a) Opinion of Stockholder's  Counsel.  The Parent shall have received
     from  counsel to the  Company  and the  Stockholder,  an opinion of counsel
     dated the Closing Date in form and substance satisfactory to the Parent.

          (b)  Compliance  with  this  Agreement.  Each of the  Company  and the
     Stockholder shall have performed and complied in all material respects with
     all  agreements,  covenants  and  conditions  contained  herein  which  are
     required to be performed or complied on or before the Closing Date.

          (c)  Company's  and  Stockholder's   Representations   and  Warranties
     Complete and Correct. The representations and warranties of the Company and
     the Stockholder contained in Sections 3.05 and 5.02 of this Agreement shall
     be complete  and correct when made and shall be complete and correct at and
     as of the Closing Date, after giving effect to the transaction contemplated
     by this Agreement, as if made on and as of such date.

          (d)  Other   Documentation.   The  Parent  shall  have  received  such
     additional  supporting  documents and other  information  as the Parent may
     reasonably request.



                    ARTICLE V. REPRESENTATIONS AND WARRANTIES

          Section  5.01.  Representations  and  Warranties of the Parent and the
Sub. Each of the Parent and Sub, jointly and severally,  represents and warrants
to the Company and the Stockholder as follows:

          (a) Organization, Good Standing and Qualification.  Each of the Parent
     and its Subsidiaries is a corporation duly organized,  validly existing and
     in good standing

384488.1


                                      -19-

<PAGE>



     under the laws of its jurisdiction of  incorporation  or organization,  and
     the Parent  and its  Subsidiaries  has all  requisite  corporate  power and
     authority under such laws to own or lease and operate its properties and to
     carry on its business as now conducted.  The Parent and its Subsidiaries is
     duly qualified or licensed to do business as a foreign  corporation in good
     standing  in  each  jurisdiction  in  which  the  nature  of  the  business
     transacted by it or the character of the  properties  owned or leased by it
     requires it to so qualify or be  licensed,  except  where the failure to so
     qualify or be  licensed  or be in good  standing  would not have a Material
     Adverse  Effect.  Each of the  Parent and Sub has the  corporate  power and
     authority to execute,  deliver and perform the Basic Agreements to which it
     is a party,  and the Parent has the corporate power and authority to issue,
     sell and deliver  the 8%  Preferred  Stock  Series A and,  upon  conversion
     thereof, to issue and deliver the Conversion Shares.

          (b) Authorization, Enforceability. All corporate action on the part of
     the  Parent  and  Sub,  and  their  respective   officers,   directors  and
     stockholders necessary for the authorization, execution and delivery of the
     Basic Agreements,  the performance of all obligations of the Parent and Sub
     thereunder  and the  authorization,  issuance,  sale and delivery of the 8%
     Preferred  Stock Series A and the Conversion  Shares has been taken or will
     be taken prior to the Closing.  Each of the Basic  Agreements has been duly
     authorized,  executed and  delivered by the Parent and Sub and  constitutes
     valid  and  legally  binding  obligations  of the  Parent,  enforceable  in
     accordance with their respective  terms,  except as  enforceability  may be
     limited by applicable bankruptcy, insolvency, reorganization, moratorium or
     similar laws affecting the enforcement of creditors'  rights  generally and
     by  general  principles  of  equity  (whether   enforcement  is  sought  by
     proceedings in equity or at law).

          (c) No Conflict.  The  execution and delivery by the Parent and Sub of
     the Basic  Agreements  to which they are a party,  the  performance  by the
     Parent and Sub of their respective  obligations  thereunder,  the issuance,
     sale and delivery of the 8% Preferred  Stock Series A and, upon  conversion
     thereof,  the  issuance  and delivery of the  Conversion  Shares,  will not
     violate any  provision  of law, the Charter or Bylaws of the Parent or Sub,
     or, any order of any court or other agency of government, or conflict with,
     result in a breach of or constitute  (with notice or lapse of time or both)
     a default under any indenture,  agreement or other  instrument by which the
     Parent or Sub or any of their respective  properties or assets is bound, or
     result in the  creation or  imposition  of any lien,  charge,  restriction,
     claim or lien of any nature  whatsoever known to the Parent or Sub upon any
     of the properties or assets of the Parent or Sub.

          (d) Outstanding  Options,  Etc. As of the Closing Date,  there are not
     outstanding  any  options,   warrants,   rights  (including  conversion  or
     preemptive rights) or agreements, orally or in writing, for the purchase or
     acquisition  from the Parent of any shares of its capital  stock except for
     (i) the conversion privileges of the 7%

384488.1


                                      -20-

<PAGE>



     Preferred  Stock,  and the 8% Preferred  Stock Series A and (ii) options to
     purchase  up to 952,500  shares of Common  Stock  that have been  issued to
     directors and employees of the Parent.

          (e) Valid Issuance of Securities.  (i) The 8% Preferred Stock Series A
     to be issued  pursuant to this Agreement  will be duly and validly  issued,
     fully paid and nonassessable.  The Common Stock issuable upon conversion of
     8%  Preferred  Stock  Series  A has  been  duly and  validly  reserved  for
     issuance,  and upon issuance in accordance with the Charter,  shall be duly
     and validly issued, fully paid and non-assessable.

          (ii) Neither the issuance,  sale or delivery of the 8% Preferred Stock
     Series A nor, upon the conversion thereof,  the issuance or delivery of the
     Conversion Shares is subject to any preemptive right of stockholders of the
     Parent  arising  under law or the Charter or Bylaws of the  Parent,  to any
     contractual right of first refusal or other right in favor of any person.

          (f) Litigation.  There is no action, suit, proceeding or investigation
     pending or currently  threatened  against the Parent or Sub that  questions
     the validity of the Basic  Agreements  or the right of the Parent or Sub to
     enter into them, or to consummate the transactions contemplated thereby, or
     that  might,  either  individually  or in the  aggregate,  have a  Material
     Adverse Effect on the Parent, or result in any change in the current equity
     ownership  of the Parent,  nor is the Parent  aware that there is any basis
     for the  foregoing.  The Parent is not a party or subject to the provisions
     of any  order,  writ,  injunction,  judgment  or  decree  of any  court  or
     government agency or instrumentality.  There is no action, suit, proceeding
     or  investigation  by the  Parent  currently  pending  or which the  Parent
     intends to initiate.

          (g)   Governmental   Consents.    Assuming   the   accuracy   of   the
     representations and warranties of the Stockholder and the Company set forth
     in this Agreement,  no consent,  approval,  order or  authorization  of, or
     registration,  qualification,  designation, declaration or filing with, any
     governmental  authority  on the part of the  Parent or Sub is  required  in
     connection with the consummation of the  transactions  contemplated by this
     Agreement.

          (h) Compliance  with Law and Other  Instruments.  The Parent is not in
     conflict  with,  or  in  default  or  violation  of,  (i)  any  law,  rule,
     regulation,  order,  judgment or decree applicable to it or by which any of
     its  property  or assets  is bound or  affected,  or (ii) any  note,  bond,
     mortgage, indenture, contract, agreement, lease, license, permit, franchise
     or other  instrument  or  obligation to which it is a party or by which the
     Parent or any property or asset of the Parent is bound or affected, except

384488.1


                                      -21-

<PAGE>



     for any such conflicts, defaults or violations that would not, individually
     or in the aggregate, have a Material Adverse Effect.

          (i) Disclosure. The Parent has fully provided the Stockholder with all
     the information which the Stockholder has requested for deciding whether to
     undertake  the   transactions   contemplated  by  this  Agreement  and  all
     information which the Parent believes is reasonably necessary to enable the
     Stockholder to make such decision, including the Parent's Executive Summary
     Book and Property Information Book, as amended or supplemented from time to
     time prior to date hereof (collectively,  the "Executive Summary"). Neither
     the  Executive   Summary,   this  Agreement  nor  any  other  statement  or
     certificate  made or delivered in connection  herewith  contains any untrue
     statement of a material fact or omits to state a material fact necessary to
     make the statements  herein or therein not  misleading,  except that,  with
     respect to  projections  contained  in the  Executive  Summary,  the Parent
     represents only that such  projections were prepared in good faith and that
     the Parent believes there is a reasonable basis for such projections.

          (j)  Securities  Reports.  All forms,  reports,  statements  and other
     documents  filed by the Parent  with the  Commission  were  prepared in all
     material respects in accordance with the requirements of applicable law and
     did not at the time they were  filed  contain  any  untrue  statement  of a
     material  fact or omit to  state a  material  fact  required  to be  stated
     therein or necessary in order to make the statements  therein,  in light of
     the circumstances under which they were made, not misleading.

          (k)  Taxes.  The  Parent  elected  to  be  taxable  as a  real  estate
     investment  trust for federal  income tax purposes  beginning in 1982,  its
     first  year of  existence.  The Parent  has filed all  material  income and
     franchise tax returns required by applicable law to be filed by it, and has
     timely paid all Taxes  shown due on such  returns.  There is no  agreement,
     waiver or consent  providing  for an  extension of time with respect to the
     assessment  of any tax or tax  deficiency  against the Parent.  There is no
     action,  suit,  proceeding,  investigation,  audit  or  claim  now  pending
     against, or with respect to, the Parent in respect of any Taxes. The Parent
     has not filed any agreement or consent under Section 341(f) of the Internal
     Revenue Code of 1986, as amended.

          (l) No Material Adverse Change.  Subsequent to the respective dates as
     of which  information is given in the Parent's Form 10K for its fiscal year
     ended December 31, 1995, its Form 10Qs for the first three fiscal  quarters
     of fiscal 1996 and its proxy  statement  for its June 20,  1996  meeting of
     stockholders  (the  "Commission  Filings") and prior to the Effective Time,
     except as set forth in or contemplated  by the Commission  Filings and this
     Agreement,  (i)  there  has not been any  material  adverse  change  or any
     development involving a prospective material

384488.1


                                      -22-

<PAGE>



     adverse change, in the business, properties,  business prospects, condition
     (financial  or  otherwise)  or results of  operations  of the Parent or any
     Subsidiary,  arising for any reason whatsoever, (ii) neither the Parent nor
     any  Subsidiary  has  incurred or will incur any  material  liabilities  or
     obligations,  direct or  contingent,  nor has the Parent or any  Subsidiary
     entered  into nor will it enter into any material  transactions  other than
     pursuant to this Agreement and the transactions  referred to herein and the
     acquisition of One Lincoln  Terrace,  Oak Book,  Illinois and (iii) neither
     the  Parent  nor any  Subsidiary  has or  will  have  purchased  any of its
     outstanding capital stock.

          (m) Title to Properties. To the Parent's knowledge, the Parent and the
     Subsidiaries  have good and  marketable  title to all properties and assets
     described in the  Commission  Filings or the Executive  Summary as owned by
     them, free and clear of all liens,  security interests,  pledges,  charges,
     encumbrances,  mortgages,  defects  or  restrictions,  except  such  as are
     described in the Commission  Filings or the Executive Summary or such as do
     not have a Material Adverse Effect. To the Parent's  knowledge,  the Parent
     and each  Subsidiary owns or leases all such properties as are necessary to
     its  operations  as now  conducted or as proposed to be  conducted,  except
     where the  failure  to so own or lease  would not have a  Material  Adverse
     Effect.

          (n)  Compliance  with  Laws.  To  the  Parent's  knowledge,   (a)  the
     operations  of the  Parent  and each  Subsidiary  with  respect to any real
     property  currently leased or owned or by any means controlled by it are in
     compliance in all material respects with all applicable federal, state, and
     local laws,  ordinances,  rules,  and regulations  relating to occupational
     health and safety and the  environment,  and the Parent and each Subsidiary
     has all licenses, permits and authorizations necessary to operate under all
     such laws, ordinances, rules and regulations and are in compliance with all
     terms and conditions of such licenses,  permits and  authorizations  except
     where the failure to comply would not have a Material  Adverse Effect;  (b)
     neither the Parent nor any  Subsidiary  has  authorized or conducted or has
     knowledge  of the  generation,  transportation,  storage,  use,  treatment,
     disposal or release of any hazardous substance,  hazardous waste, hazardous
     material, hazardous constituent, toxic substance,  pollutant,  contaminant,
     petroleum  product,  natural gas, liquefied gas or synthetic gas defined or
     regulated under any  environmental law on, in or under any real property of
     the Parent or any  Subsidiary  in any amount  which has a Material  Adverse
     Effect;  and (c)  there is no  pending  or,  to the best  knowledge  of the
     Parent,  any  threatened  claim,  litigation or any  administrative  agency
     proceeding,  nor has the Parent or any  Subsidiary  received any written or
     oral notice from any governmental entity or third party, that (i) alleges a
     violation of any laws,  ordinances,  rules and regulations by the Parent or
     such  Subsidiary;  (ii) alleges the Parent or such  Subsidiary  is a liable
     party under the  Comprehensive  Environmental  Response  Compensation,  and
     Liability Act, 42 U.S.C. ss. 9601 et seq, or any state superfund law; (iii)
     alleges  possible  contamination  of the  environment by the Parent or such
     Subsidiary; or (iv) alleges

384488.1


                                      -23-

<PAGE>



     possible  contamination of real property of the Parent or any Subsidiary or
     any case which is likely to have a Material Adverse Effect.

          (o)  Losses.  Since  December  31,  1995,  neither  the Parent nor any
     Subsidiary  has  sustained  any  material  loss or  interference  with  its
     business  from fire,  explosion,  flood or other  calamity,  whether or not
     covered by insurance,  or from any labor  dispute or court or  governmental
     action, order or decree,  otherwise than as disclosed in or contemplated by
     the  Commission  Filings  or the  Executive  Summary,  which has a Material
     Adverse Effect.

          (p) Seattle Obligation.  The Cumulative Preference Deficit (as defined
     in and pursuant to the Partnership  Agreement of Third  University  Limited
     Partnership, dated as of October 3, 1986 and as amended to the date of this
     Agreement) payable to Arico Seattle Inc. is $8,107,590.86.

          Section 5.02.  Representations  and Warranties of the  Stockholder and
the Company. The Stockholder and the Company,  jointly and severally,  represent
and warrant to the Parent and Sub as follows:

          (a)  Incorporation  and Authority of the Company and the  Stockholder.
     Each of the Company and the Stockholder is a corporation duly incorporated,
     validly existing and in good standing under the laws of its jurisdiction of
     incorporation  or  organization  and has all necessary  corporate power and
     authority  to enter into the Basic  Agreements  to which it is a party,  to
     carry out its  obligations  thereunder and to consummate  the  transactions
     contemplated thereby. The execution and delivery by each of the Company and
     the  Stockholder  of the Basic  Agreements  to which it is  party,  and the
     consummation by each of the Company and the Stockholder of the transactions
     contemplated  thereby, have been duly authorized by all necessary corporate
     action  on the  part  of the  Company  and  the  Stockholder  and no  other
     corporate  proceedings  on the part of the Company or the  Stockholder  are
     necessary  to  authorize  the  Basic   Agreements  or  to  consummate   the
     transactions  contemplated thereby. Each of the Company and the Stockholder
     has duly executed and delivered each of the Basic Agreements to which it is
     a party and,  assuming  due  authorization,  execution  and delivery by the
     other parties thereto, each of the Basic Agreements  constitutes the legal,
     valid and binding  obligation  of each of the  Company and the  Stockholder
     enforceable  against the Company and the  Stockholder  in  accordance  with
     their respective terms. The restrictions on business combinations contained
     in Section  203 of Delaware  Law have been  satisfied  with  respect to the
     Merger.

          (b) Organization and Qualification of the Company and the Stockholder.
     (i) Each of the Company and the  Stockholder  has the  requisite  power and
     authority  and all  necessary  governmental  approvals  to own,  lease  and
     operate its properties and

384488.1


                                      -24-

<PAGE>



     to carry on its  business as it is now being  conducted,  except  where the
     failure to be so  organized,  existing or in good  standing or to have such
     power,  authority and governmental  approvals would not, individually or in
     the  aggregate,  have a  Material  Adverse  Effect.  The  Company  is  duly
     qualified or licensed as a foreign  corporation  to do business,  and is in
     good standing,  in each jurisdiction  where the character of the properties
     owned,  leased or operated by it or the nature of its  business  makes such
     qualification  or licensing  necessary,  except for such  failures to be so
     qualified or licensed and in good standing that would not,  individually or
     in the  aggregate,  have a Material  Adverse  Effect.  The Company does not
     directly  or  indirectly  own any  equity or  similar  interest  in, or any
     interest convertible into or exchangeable or exercisable for, any equity or
     similar interest in, any corporation,  partnership,  joint venture or other
     business association or entity.

          (ii)  True,   complete  and  correct  copies  of  the  Certificate  of
     Incorporation  and  Bylaws  of the  Company,  each as in effect on the date
     hereof, have been delivered by the Company to the Parent.

          (c) Capital Stock of the Company.  The authorized capital stock of the
     Company  consists of 1,000 shares of common stock ("Company Common Stock").
     As of the date  hereof,  100 shares of Company  Common Stock are issued and
     outstanding, all of which are validly issued, fully paid and nonassessable.
     None of the  issued and  outstanding  shares of  Company  Common  Stock was
     issued  in  violation  of any  preemptive  rights.  There  are no  options,
     warrants, convertible securities or other rights, agreements,  arrangements
     or  commitments  of any  character  relating  to the  capital  stock of the
     Company or  obligating  the  Company to issue or sell any shares of capital
     stock of, or any other  interest in, the Company.  There are no outstanding
     contractual  obligations of the Company to repurchase,  redeem or otherwise
     acquire any shares of Company  Common Stock or to provide funds to, or make
     any investment (in the form of a loan,  capital  contribution or otherwise)
     in, any other Person.

          (d)  Corporate  Books and  Records.  The minute  books of the  Company
     contain and properly reflect all proceedings of the stockholders, Boards of
     Directors  and all  committees  of the Boards of  Directors of the Company.
     Complete  and  accurate  copies of all such  minute  books and of the stock
     register of the Company have been provided or made available by the Company
     to the Parent. The foregoing notwithstanding, copies of the minute books of
     the  Company  made  available  by the  Company to the  Parent  prior to the
     Effective  Time do not  contain  records  of  proceedings  relating  to the
     consideration  of the  transactions  contemplated  by this Agreement or the
     alternatives  thereto  considered by the Boards of Directors (or committees
     thereof) of the Company in the discharge of their fiduciary duties.


384488.1


                                      -25-

<PAGE>



          (e) Taxes.  The  Company is a  qualified  REIT  subsidiary  within the
     meaning of Section  856(i) of the Code.  The Company has filed all material
     income and franchise tax returns  required by applicable law to be filed by
     it, and has timely  paid all Taxes shown due on such  returns.  There is no
     agreement,  waiver  or  consent  providing  for an  extension  of time with
     respect  to the  assessment  of any  Taxes or tax  deficiency  against  the
     Company.  There is no action,  suit,  proceeding,  investigation,  audit or
     claim now pending against, or with respect to the Company in respect of any
     Taxes.  The Company has not filed any  agreement or consent  under  Section
     341(f) of the Internal Revenue Code of 1986, as amended. The Company has no
     built-in gain within the meaning of Internal  Revenue Service Notice 88-19.
     There are no tax liens on any assets or any  subsidiaries  of the  Company.
     Neither the  Stockholder  nor any  affiliate is a party to any agreement or
     arrangement  that would  result,  separately  or in the  aggregate,  in the
     actual or deemed  payment  by the  Company or a Company  subsidiary  of any
     "excess parachute payments" within the meaning of Section 280G of the Code.

          (f) Vote  Required.  The  affirmative  vote of the  holders of Company
     Common  Stock,  is the only vote of the  holders  of any class or series of
     capital stock of the Company necessary to approve the Merger.

          (g) Full Disclosure.  No  representation or warranty of the Company or
     the  Stockholder  in this  Agreement,  nor  any  statement  or  certificate
     furnished or to be furnished to the Parent pursuant to this  Agreement,  or
     in  connection  with  the  transactions  contemplated  by  this  Agreement,
     contains or will contain any untrue  statement of a material fact, or omits
     or will omit to state a  material  fact  necessary  to make the  statements
     contained herein or therein not misleading.

          (h) Purchase Entirely for Own Account. The 8% Preferred Stock Series A
     will be acquired for investment for the Stockholder's own account, not as a
     nominee or agent,  and not with a view to the resale or distribution of any
     part  thereof,  and the  Stockholder  has no present  intention of selling,
     granting any  participation  in, or otherwise  distributing  the same.  The
     Stockholder further represents that the Stockholder does not presently have
     any  contract,  undertaking,  agreement or  arrangement  with any person to
     sell,  transfer  or grant  participation  to such  person  or to any  third
     person, with respect to any of the 8% Preferred Stock Series A.

          (i) Investment Experience.  The Stockholder is an experienced investor
     and  acknowledges  that it can bear the economic risk of its investment and
     has such knowledge and experience in financial or business  matters that it
     is capable of evaluating  the merits and risks of the  investment in the 8%
     Preferred Stock Series A. The  Stockholder  also represents it has not been
     organized for the purpose of acquiring the 8% Preferred Stock Series A.

384488.1


                                      -26-

<PAGE>




          (j) Restricted  Securities.  The Stockholder  understands  that the 8%
     Preferred  Stock  Series A, and the shares of Common  Stock  issuable  upon
     conversion thereof, are characterized as "restricted  securities" under the
     federal securities laws inasmuch as they are being acquired from the Parent
     in a transaction  not involving a public  offering and that under such laws
     and applicable  regulations such shares may be resold without  registration
     under  the  1933  Act  only  in  certain  limited  circumstances.  In  this
     connection,  the Stockholder  represents that it is familiar with SEC Rules
     144  and  144A,  as  presently  in  effect,   and  understands  the  resale
     limitations imposed thereby and otherwise by the 1933 Act.

          (k)  Access to  Information.  The  Stockholder  has had  access to the
     management  and  records of the Parent  and has had an  opportunity  to ask
     questions of management of the Parent regarding its business and affairs.


                       ARTICLE VI. COVENANTS OF THE PARENT

          The Parent covenants and agrees with the Stockholder  that, so long as
any of the 8% Preferred Stock Series A are outstanding:

          Section  6.01.  Financial  Statements,  Reports,  Etc.  So long as the
Stockholder owns shares of 8% Preferred Stock Series A, the Parent shall furnish
to the  Stockholder,  within 30 days after the Parent files with the Commission,
copies of its annual  reports and other  information,  documents and reports (or
copies of such portions of any of the foregoing as the  Commission  may by rules
and  regulations  prescribe)  that it is  required  to file with the  Commission
pursuant to Section 13 or 14 of the 1934 Act.

          Section 6.02.  Reserve for Conversion  Shares. The Parent shall at all
times reserve and keep available out of its  authorized  but unissued  shares of
Common Stock,  for the purpose of effecting  the  conversion of the 8% Preferred
Stock  Series A, such number of its duly  authorized  shares of Common  Stock as
shall be sufficient to effect the conversion of the 8% Preferred  Stock Series A
from  time to time  outstanding.  If at any time the  number of  authorized  but
unissued shares of Common Stock shall not be sufficient to effect the conversion
of the 8%  Preferred  Stock  Series  A, the  Parent  shall  forthwith  take such
corporate  action as may be necessary to increase  its  authorized  but unissued
shares of Common Stock to such number of shares as shall be sufficient  for such
purpose. The Parent shall obtain any authorization,  consent,  approval or other
action by or make any filing with any court or  administrative  body that may be
required under  applicable state securities laws in connection with the issuance
of shares of Common Stock upon conversion of the 8% Preferred Stock Series A.


384488.1


                                      -27-

<PAGE>



          Section 6.03.  Debt  Restriction.  The Parent shall not Incur any Debt
unless after giving  effect to such  Incurrence  the Debt of the Parent will not
exceed 60% of the appraised  value of the assets of the Parent;  provided  that,
notwithstanding  the  foregoing,  the  Parent  may at any time  Incur Debt in an
amount which does not exceed the  principal  amount of  outstanding  Debt of the
Parent extended, refinanced, renewed or replaced with the proceeds thereof, plus
any costs associated with the extension, refinancing, renewal or replacement.

          Section 6.04.  Payment of Dividends on the 7% Preferred  Stock and the
8%  Preferred  Stock.  For so long as any 8%  Preferred  Stock  Series A remains
outstanding,  the Parent  shall  continue to pay  dividends  on the 7% Preferred
Stock and the 8% Preferred Stock in good faith so long as it has funds available
therefor.


               ARTICLE VII. SURVIVAL OF REPRESENTATIONS; INDEMNITY

          Section 7.01.  Survival.  Each and every  representation  and warranty
contained in this  Agreement  shall survive the Closing and shall not merge into
the  documents  delivered at the  Closing,  but instead  shall be  independently
enforceable  except to the extent expressly limited herein;  provided,  however,
each of the  representations  and  warranties  of the  Stockholder  contained in
Sections  3.05(a)(i)  through (vii), (x) and (xiii) shall terminate on the first
anniversary  of the Closing  Date and each of the other  representations  of the
Stockholder and each of the representations of the Parent shall terminate on the
sixth  anniversary  of the Closing  Date.  No party to this  Agreement  shall be
permitted to make any claim against any other party for breach of representation
or  warranty  unless the amount  claimed  in good  faith by the  claiming  party
exceeds in the aggregate $10,000.

          Section 7.02.  Indemnification  by the  Stockholder.  The  Stockholder
shall indemnify and hold each of the Parent and Sub harmless against any and all
claims, losses, damages,  penalties,  fines, forfeitures,  reasonable attorneys'
fees and expenses and related costs, expenses of litigation,  judgments, and any
other costs,  fees and expenses  resulting from (i) a breach of a representation
or warranty made by the  Stockholder or the Company under this  Agreement,  (ii)
all Taxes that may be imposed or  asserted  with  respect to the  Company or its
assets or  operations in respect of any period or portion  thereof  ending on or
before  the  Closing  Date,  and any Taxes  arising  as a result  of the  Merger
(whether in accordance with Internal Revenue Service Notice 88-19, under Section
1445 of the Code, or otherwise),  or (iii) an action, suit or proceeding brought
or filed  against the  Company,  the Parent or Sub based on acts or omissions of
the Company occurring prior to the Closing Date.

          Section  7.03.   Indemnification  by  the  Parent.  The  Parent  shall
indemnify and hold the Stockholder harmless against any and all claims,  losses,
damages, penalties, fines,

384488.1


                                      -28-

<PAGE>



forfeitures, reasonable attorneys' fees and expenses and related costs, expenses
of litigation,  judgments, and any other costs, fees and expenses resulting from
a  breach  of a  representation  or  warranty  made  by the  Parent  under  this
Agreement.

          Section 7.04. Indemnification Procedures. Promptly after receipt by an
indemnified  party under this Article VII of notice of the  commencement  of any
action such indemnified party shall, if a claim in respect thereof is to be made
against the  indemnifying  party under this Article VII, notify the indemnifying
party in  writing  of the  commencement  thereof;  provided,  however,  that the
failure  so to  notify  the  indemnifying  party  will not  relieve  it from any
liability  which it may have under this  Article VII except to the extent it has
been  materially  prejudiced by such failure and,  provided,  further,  that the
failure to notify the  indemnifying  party shall not  relieve  the  indemnifying
party from any liability  which it may have to any  indemnified  party otherwise
than under this  Article  VII.  In case any such  action is brought  against any
indemnified  party, and it notifies the  indemnifying  party of the commencement
thereof,  the indemnifying party will be entitled to participate  therein and to
the  extent  that it may wish,  to assume  the  defense  thereof,  with  counsel
satisfactory to such  indemnified  party (who shall not, except with the consent
of the indemnified  party, be counsel to the indemnifying  party).  After notice
from the  indemnifying  party to such  indemnified  party of its  election so to
assume the defense of such claim or action,  the indemnifying  party will not be
liable to such  indemnified  party under this Article VII for any legal or other
expenses  subsequently incurred by such indemnified party in connection with the
defense thereof other than reasonable costs of investigation; provided, that the
indemnified  party shall have the right to employ  separate  counsel  (including
local counsel), and the indemnifying party shall bear the reasonable fees, costs
and expenses of such  separate  counsel if (i) the use of counsel  chosen by the
indemnifying party to represent the indemnified party would present such counsel
with a conflict or potential conflict of interest,  (ii) the actual or potential
defendants in, or targets of, any such action include both the indemnified party
and the  indemnifying  party and the  indemnified  party  shall have  reasonably
concluded  that  there  may be  legal  defenses  available  to it  and/or  other
indemnified parties which are different from or additional to those available to
the indemnifying  party,  (iii) the  indemnifying  party shall not have employed
counsel satisfactory to the indemnified party to represent the indemnified party
within a reasonable time after notice of the commencement of such action or (iv)
the indemnifying  party shall authorize the indemnified party to employ separate
counsel at the expense of the indemnifying party. No indemnifying party shall be
liable for any  settlement of any action or claim for monetary  damages which an
indemnified  party may effect  without  the consent of the  indemnifying  party,
which  consent  shall  not  be  unreasonably   withheld.   The   indemnification
obligations hereunder are payable as they are incurred.



384488.1


                                      -29-

<PAGE>



                           ARTICLE VIII. MISCELLANEOUS

          Section  8.01.  Expenses.  The  Parent  agrees  to pay on  demand  all
reasonable  out-of-pocket  costs and expenses of the  Stockholder  in connection
with the execution and delivery of the Basic  Agreements and the other documents
to be delivered under the Basic Agreements.

          Section  8.02.  Assignment.  This  Agreement  may not be  assigned  by
operation of law or otherwise without the express written consent of each of the
parties hereto.

          Section 8.03.  Benefit;  Successors  and Assigns.  Except as otherwise
provided  herein,  this  Agreement  shall be binding upon and shall inure to the
benefit of the parties  hereto and their  respective  successors  and  permitted
assigns;  provided,  however, that this Agreement shall not inure to the benefit
of any successor or assignee  unless such assignee  shall have complied with the
terms of Section 8.02.  Nothing in this  Agreement  either express or implied is
intended  to confer on any  person,  other  than the  parties  hereto  and their
respective successors and permitted assigns, any rights, remedies or obligations
under or by reason of this Agreement.

          Section  8.04.  Specific  Performance.  The parties  hereto agree that
irreparable  damage would occur in the event any provision of this Agreement was
not performed in accordance  with the terms hereof and that the parties shall be
entitled to specific  performance of the terms hereof,  in addition to any other
remedy at law or equity.

          Section  8.05.  Notices.  All  notices,  requests,  consents and other
communications hereunder shall be in writing and shall be delivered in person or
mailed by certified or registered mail, return receipt requested,  or telecopied
in the case of non-U.S. residents, addressed as follows:

          (a) if to the Parent or the Sub:

              126  East  56th  Street  
              New  York,  New  York  10022  
              Attention: President 
              Fax: (212) 605-7199


384488.1


                                      -30-

<PAGE>



              with a copy to:

              Shearman & Sterling
              599 Lexington Avenue
              New York, New York  10022
              Attention:  F. H. Moore, Jr.
              Fax:  (212) 848-7179

          (b) if to the Stockholder or the Company:

              CGR Advisors
              950 East Paces Ferry Road
              Suite 2275
              Atlanta GA  30326-1119
              Attention:  President
              Fax:  (404) 239-6069

              with a copy to:

              Arnall, Golden & Gregory
              2800 One Atlantic Center
              1201 West Peachtree Street
              Atlanta, GA  30309-3400
              Attention:  James E. Dorsey
              Fax:  (404) 873-8609

or, in any such case,  at such other  address  or  addresses  as shall have been
furnished  in  writing  by such  party to the  others.  All  notices,  requests,
consents and other  communications  hereunder  shall be deemed to have been duly
given  or  served  on the  date on  which  personally  delivered  or on the date
actually  received,   if  sent  by  mail,  telecopier  or  telex,  with  receipt
acknowledged.

          Section 8.06.  Governing Law. This Agreement  shall be governed by and
construed in accordance with the laws of the State of New York.

          Section  8.07.  Entire  Agreement.   This  Agreement,   including  the
Schedules and Exhibits hereto,  constitutes the sole and entire agreement of the
parties with respect to the subject  matter  hereof.  All Schedules and Exhibits
hereto are hereby incorporated herein by reference.


384488.1


                                      -31-

<PAGE>



          Section 8.08.  Counterparts.  This Agreement may be executed in two or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

          Section  8.09.  Amendments.  This  Agreement  may  not be  amended  or
modified, and no provisions hereof may be waived, without the written consent of
the Parent and the Stockholder.

          Section 8.10.  Severability.  If any provision of this Agreement shall
be declared void or unenforceable by any judicial or  administrative  authority,
the validity of any other  provision  and of the entire  Agreement  shall not be
affected thereby.

          Section 8.11.  Titles and Subtitles.  The titles and subtitles used in
this  Agreement  are  for  convenience  only  and are  not to be  considered  in
construing or interpreting any term or provision of this Agreement.

          Section  8.12.  Further  Assurances.  From and  after the date of this
Agreement, upon the request of the Parent or the Stockholder, the Parent and the
Stockholder  shall  execute and deliver such  instruments,  documents  and other
writings as may be  reasonably  necessary  or desirable to confirm and carry out
and to effectuate fully the intent and purposes of this Agreement.

384488.1


                                      -32-

<PAGE>



          IN WITNESS WHEREOF,  the Parent,  Sub, the Company and the Stockholder
have executed this Agreement as of the day and year first above written.


                                        CORNERSTONE PROPERTIES INC.


                                        By:
                                             Name:
                                             Title:


                                        CSTONE-PITTSBURGH TRUST


                                        By:
                                             Name:
                                             Title:


                                        HEXALON REAL ESTATE, INC.


                                        By:
                                             Name:
                                             Title:


                                        FRICK BUILDING INC.


                                        By:
                                             Name:
                                             Title:


384488.1


                                      -33-

<PAGE>



                                    EXHIBIT A


            [Stockholders' Agreement Filed as Exhibit 99.2 herewith]


384488.1

<PAGE>



                                    EXHIBIT B

                                STATE OF MARYLAND
                                     482641
                               STATE DEPARTMENT OF
                            ASSESSMENTS AND TAXATION
                301 West Preston Street Baltimore, Maryland 21201

          I, LEAH HAMM-CURRY  ___________ OF THE STATE DEPARTMENT OF ASSESSMENTS
AND TAXATION OF THE STATE OF MARYLAND,  DO HEREBY CERTIFY THAT SAID  DEPARTMENT,
BY THE  LAWS OF SAID  STATE,  IS THE  CUSTODIAN  OF THE  RECORDS  OF THIS  STATE
RELATING  TO  THE  FORFEITURE  OR  SUSPENSION  OF  CORPORATE  CHARTERS,   OR  OF
CORPORATIONS TO TRANSACTION  BUSINESS IN THIS STATE; AND I AM THE PROPER OFFICER
TO EXECUTE THIS CERTIFICATE.

          I FURTHER CERTIFY THAT  CSTONE-PITTSBURGH  TRUST ________________ IS A
CORPORATION  DULY  INCORPORATED  AND EXISTING UNDER AND BY VIRTUE OF THE LAWS OF
___________  MARYLAND  ____________  AND SAID  CORPORATION  HAS FILED ALL ANNUAL
REPORTS REQUIRED, HAS NO OUTSTANDING LATE FILING PENALTIES ON THOSE REPORTS, AND
HAS A  RESIDENT  AGENT.  THEREFORE,  THE  CORPORATION  IS AT THE  TIME  OF  THIS
CERTIFICATE  IN GOOD  STANDING  WITH  THIS  DEPARTMENT  AND DULY  AUTHORIZED  TO
EXERCISE ALL THE POWERS RECITED IN ITS CHARTER OF CERTIFICATE OF  INCORPORATION,
AND TO TRANSACT BUSINESS IN THE STATE OF MARYLAND.

IN THIS DOCUMENT THE WORD CORPORATION  SHOULD BE INTERPRETED TO MEAN REAL ESTATE
INVESTMENT TRUST,  CHARTER TO MEAN DECLARATION OF TRUST AND INCORPORATED TO MEAN
FORMED.



                                        IN WITNESS WHEREOF,  I HAVE HEREUNTO SET
                                   MY HAND AND  AFFIXED  THE  SEAL OF THE  STATE
                                   DEPARTMENT  OF  ASSESSMENT  AND  TAXATION  OF
                                   MARYLAND  AT   BALTIMORE   THIS  4TH  DAY  OF
                                   NOVEMBER, 1996.


[STATE SEAL]                                 LEAH HAMM-CURRY
                                             OFFICE SUPERVISOR II

384488.1

<PAGE>



                                    EXHIBIT C


         [Certificate of Designation for the 8% Preferred Stock Series A
                         Filed as Exhibit 99.3 herewith]


384488.1

<PAGE>



                                  EXHIBIT "R-A"

                 Frick Building, Inc. - TICOR Title Policy Legal

All that  certain lot or piece of ground  situate in the 2nd Ward of the City of
Pittsburgh,  County of Allegheny and  Commonwealth of  Pennsylvania,  being more
particularly bounded and described as follows, to-wit:

BEGINNING at the point formed by the intersection of the  Southwesterly  line of
Fifth  Avenue  (60.07  feet  wide) and the  Northwesterly  line of Grant  Street
(80.109 feet wide);  thence along the Northwesterly line of Grant Street,  South
30 degrees 56' 40" West, a distance of 226.12 feet to a point;  thence along the
Northeasterly line of Forbes Avenue (55.47 feet wide),  formerly Diamond Street,
North 59(0) 57' 20" West, a distance of 100.54 feet to a point; thence along the
Southeasterly  line of Scrip Way (20.02  feet  wide),  North 30 degrees  58' 40"
East, a distance of 226.03 feet to a point;  and thence along the  Southwesterly
line of Fifth  Avenue,  South 60 degrees 00' 20" East, a distance of 100.43 feet
to the point at the place of beginning.

BEING  designated as Block 2-E, Lot 160 in the Deed Registry Office of Allegheny
County, Pennsylvania.

Being the same property acquired by Frick Building, Inc., under and by virtue of
deed from 437 Grant Street Partners,  Ltd. a Pennsylvania  limited  partnership,
dated July 26,  1989 and  recorded  August 1, 1989 in the  Recorder's  Office of
Allegheny County, Pennsylvania in Deed Book Volume 8068, Page 265.




384488.1

<PAGE>



                                   EXHIBIT R-B

                               THE FRICK BUILDING
                             PERSONAL PROPERTY LIST

General Building
Appliances
Bathroom accessories
Vertical blinds
Horizontal blinds
Carpet
Curtains and curtain track 
Built-in  cabinets  
Drinking  fountains 
Special doors
Special  hardware 
Fire  extinguishers  
Exit lights  
Moveable  partitions  
Toilet partitions  
Shelves  
Insert  Lenses  
HVAC  Wall  Units   
Communications   system
Mechanical equipment 
Doors and hardware
Bronze Telephone Booths (4) in Lobby
Marble Cutting Machine
Plants and Containers
Lobby Directory Boards

Management Office
Lanier Word  Processor
Xerox 6010 memory  typewriter  
Telrad  Electronic  Phone System 
Xerox Copier 
Facsimile Machine 
Conference room table and chairs (7) 
Round table and  chairs (6)  
Receptionist's  desk and chair  
Manager's  desk and chair
Filing   cabinets  (4)  
Reception  area  chairs  (4)  
Stereo  system   
Christmas decorations  (storage)  
Books/chairs/pictures  (storage)  
Artwork  (collage  and print)

384488.1

<PAGE>




                                   EXHIBIT R-D


                         FORM OF NON-FOREIGN CERTIFICATE


                             NON-FOREIGN CERTIFICATE
                               THE FRICK BUILDING
                            PITTSBURGH, PENNSYLVANIA


          To inform  Cornerstone  Properties  Inc.,  a Nevada  corporation  (the
"Transferee"),  that  withholding  of tax  under  Section  1445 of the  Internal
Revenue Code of 1986,  as amended (the  "Code"),  will not be required  upon the
transfer  of  certain  real  property  to the  Transferee  by  _____________,  a
_________________  (the  "Transferor"),  the  undersigned  hereby  certifies the
following on behalf of the Transferor:

          1. The Transferor is not a foreign  corporation,  foreign partnership,
foreign trust, or foreign estate (as those terms are defined in the Code and the
Income Tax Regulations promulgated thereunder);

          2. The Transferor's U.S. employer identification number is __________;
and

          3. The Transferor's office address is:




The  Transferor  understands  that  this  Certificate  may be  disclosed  to the
Internal  Revenue  Service  by the  Transferee  and  that  any  false  statement
contained herein could be punished by fine, imprisonment or both.

384488.1

<PAGE>




          Under  penalty  of  perjury,  I  declare  that  I have  examined  this
Certificate  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 the Transferor.

Date:  November __, 1996

                                                   "TRANSFEROR"

                                                    FRICK BUILDING, INC.
 


                                                    By:  _____________________
                                                          Name:
                                                          Title:


384488.1

<PAGE>



                                   EXHIBIT R-E


                             FORM OF TENANT ESTOPPEL

To:      Cornerstone Properties Inc. ("Buyer")

Re:      The Frick Building, Pittsburgh, Pennsylvania (the "Property")


          The   undersigned   ______________________________,   a  _____________
("Tenant"),  is the tenant under that  certain  lease dated  _____________  (the
"Lease," which term shall include the amendments,  if any, referred to below) by
and between Tenant and Frick Building,  Inc., as lessor  ("Landlord"),  covering
premises  commonly  known as [Suite  ____________]  in the Property (the "Leased
Premises"). Tenant hereby certifies the following as of the date hereof:

          1. Tenant is the tenant under the Lease demising the Leased  Premises.
The term of the  Lease  commenced  on  ___________________  and will  expire  on
_________________.

          2. Tenant certifies to Buyer that:

               i.   the  Lease  is in full  force  and  effect  and has not been
                    cancelled, modified, assigned, extended or amended except as
                    follows:

               ii.  the  current  monthly  rent for the  Leased  Premises  as of
                    ___________   is   $_______   and  has  been  paid   through
                    __________________;

               iii. the total current additional/escalation rent for common area
                    maintenance,  real estate taxes, insurance and the like (all
                    charges  other  than  fixed  rent) as of  October 1, 1996 is
                    $_______ and such additional rent is payable monthly;

               iv.  no  installment  of rent  under the Lease has been paid more
                    than thirty (30) days in advance;

               v.   the Lease has been  neither  assigned nor any portion of the
                    Leased Premises subleased by Tenant except as follows:

               vi.  Tenant has no existing defenses, offsets, deductions, liens,
                    claims or credits  against  the  rentals  under the Lease or
                    against the enforcement of the Lease by

384488.1

<PAGE>



                    Landlord,  and, to the best of Tenant's knowledge,  Landlord
                    is not in default under the Lease; and

               vii. Tenant  has  paid  a  security  deposit  in  the  amount  of
                    $___________.

          3. This  certification is made to induce Buyer to acquire the Property
of which the Leased Premises are part.  Tenant further  acknowledges  and agrees
that the addressees  hereof and their respective  successors and assigns and the
holder of any mortgage at any time  encumbering  the Property from and after the
date of this Tenant  Estoppel  Certificate  shall have the right to rely on this
Tenant Estoppel Certificate.

          4.  Tenant  acknowledges  that  in  connection  with  the  sale of the
Property by Landlord to Buyer all of the  interest of the Landlord in and to the
Lease will be duly  assigned to Buyer and that,  after notice from  Landlord and
Buyer,  all  rent  payments  under  the  Lease  shall  be paid to  Buyer  or its
authorized agent, from and after the date of sale.

          5. The  undersigned  is  authorized  to execute  this Tenant  Estoppel
Certificate on behalf of Tenant.

Dated this ___ day of ___________, 1996.


                                            [Tenant]


                                            By:_________________________
                                                  Name:
                                                  Title:




384488.1


                                       -2-

<PAGE>



                                   EXHIBIT R-F

                               THE FRICK BUILDING
                               LEASING COMMISSIONS




      TENANT                SPACE                   COMMISSIONS DUE


    William Sittig           803                      $250.00*





Commissions which may become due under and by virtue of that certain Real Estate
Leasing  and  Management  Agreement   ("Management   Agreement")  between  Frick
Building, Inc. and Galbreath-Middle  Atlantic, dated August 1, 1995, on or after
November ___, 1996  ("Closing  Date") as a result of any extension or renewal of
any leases or in connection with the exercise,  on or after the Closing Date, of
any expansion or extension option  contained in any leases  respecting the Frick
Building.

Any "protection  list" or similar  obligation with respect to the future leasing
of the property in accordance with the Management Agreement.







*        Estimated as of closing.




384488.1

<PAGE>



                                   EXHIBIT R-H

                               THE FRICK BUILDING
                           LIENS ON PERSONAL PROPERTY




     1.   Matters  as shown on Title  Insurance  Commitment  (Case  No.  181901)
          issued by Lawyers Title  Insurance  Corporation in connection with the
          Frick Building located in Pittsburgh, PA., effective October 15, 1996,
          as may be  amended  from  time  to  time,  and  such  matters  as will
          ultimately  be shown in  Schedule  B of the  Owner's  Title  Insurance
          Policy to be issued in connection  with the merger of Frick  Building,
          Inc. and Cornerstone Properties, Inc.


384488.1

<PAGE>















                          AGREEMENT AND PLAN OF MERGER



                                      AMONG



                          CORNERSTONE PROPERTIES INC.,

                           CSTONE - PITTSBURGH TRUST,

                              FRICK BUILDING, INC.

                                       AND

                            HEXALON REAL ESTATE, INC.



                          DATED AS OF NOVEMBER 7, 1996










384488.1

<PAGE>



                                TABLE OF CONTENTS

                                                                         PAGE

ARTICLE I.  DEFINITIONS....................................................... 1
         Section 1.01   Definitions........................................... 1

ARTICLE II.  THE MERGER....................................................... 6
         Section 2.01.  The Merger............................................ 6
         Section 2.02.  Effective Time; Closing............................... 6
         Section 2.03.  Effect of the Merger.................................. 6
         Section 2.04.  Certificate of Formation; Bylaws...................... 6
         Section 2.05.  Directors and Officers................................ 7
         Section 2.06.  Conversion of Company Shares.......................... 7
         Section 2.07.  Conversion of Sub Common Stock........................ 7

ARTICLE III.  CERTAIN MATTERS PERTAINING TO REAL ESTATE AND THE COMPANY....... 7
         Section 3.01.  Delivery of Materials for Review...................... 7
         Section 3.02.  As-Is Clause.......................................... 7
         Section 3.03.  Closing Deliveries.................................... 8
         Section 3.04.  Closing Costs and Prorations.......................... 9
         Section 3.05.  Stockholder's Representations and Warranties..........12
         Section 3.06.  Brokerage Commission..................................15
         Section 3.07.  Company Dividend......................................16
         Section 3.08.  Transfer of Company Note..............................16

ARTICLE IV.  CONDITIONS.......................................................16
         Section 4.01.  Conditions to the Merger..............................16
         Section 4.02.  Conditions to the Obligations of the Stockholder......16
         Section 4.03.  Conditions to the Obligations of the Parent...........18

ARTICLE V.  REPRESENTATIONS AND WARRANTIES....................................18
         Section 5.01.  Representations and Warranties of the Parent 
                        and the Sub...........................................18
         Section 5.02.  Representations and Warranties of the Stockholder 
                        and the Company.......................................23

ARTICLE VI.  COVENANTS OF THE PARENT..........................................26
         Section 6.01.  Financial Statements, Reports, Etc....................26
         Section 6.02.  Reserve for Conversion Shares.........................26
         Section 6.03.  Debt Restriction......................................26
         Section 6.04.  Payment of Dividends on the 7% Preferred Stock 
                        and the 8% Preferred Stock............................26

ARTICLE VII.  SURVIVAL OF REPRESENTATIONS; INDEMNITY..........................27
         Section 7.01.  Survival..............................................27
         Section 7.02.  Indemnification by the Stockholder....................27

384488.1

<PAGE>




                                                                         PAGE
         Section 7.03.  Indemnification by the Parent.........................27
         Section 7.04.  Indemnification Procedures............................27

ARTICLE VIII.  MISCELLANEOUS..................................................28
         Section 8.01.  Expenses..............................................28
         Section 8.02.  Assignment............................................28
         Section 8.03.  Benefit; Successors and Assigns.......................28
         Section 8.04.  Specific Performance..................................29
         Section 8.05.  Notices...............................................29
         Section 8.06.  Governing Law.........................................30
         Section 8.07.  Entire Agreement......................................30
         Section 8.08.  Counterparts..........................................30
         Section 8.09.  Amendments............................................30
         Section 8.10.  Severability..........................................30
         Section 8.11.  Titles and Subtitles..................................30
         Section 8.12.  Further Assurances....................................30


EXHIBIT A  Stockholders' Agreement filed as Exhibit 99.2 herewith
EXHIBIT B  State of Maryland, State Dept. of Assessments and Taxation
EXHIBIT C  Certificate of Designation for the 8% Preferred Stock Series filed 
           as Exhibit 99.3 herewith


EXHIBIT R-A    Frick Building, Inc. - TICOR Title Policy Legal
EXHIBIT R-B    The Frick Building Personal Properly List
EXHIBIT R-C    The Frick Building Outstanding Tenant Improvement Allowances and 
               Service Contracts as of October 31, 1996*
EXHIBIT R-D    Form of Non-Foreign Certificate
EXHIBIT R-E    Form of Tenant Estoppel
EXHIBIT R-F    The Frick Building Leasing Commissions
EXHIBIT R-G    The Frick Building Litigation*
EXHIBIT R-H    The Frick Building Liens on Personal Property
EXHIBIT R-I    The Frick Building Security Deposits*

*Exhibit omitted as immaterial



384488.1
                                       ii

<PAGE>




     STOCKHOLDERS'  AGREEMENT,  dated as of  November  7, 1996,  by and  between
CORNERSTONE  PROPERTIES INC., a Nevada corporation (the "Company"),  and HEXALON
REAL  ESTATE,  INC.,  a Delaware  corporation  (the  "Initial  Stockholder"  and
individually  a  "Stockholder"  and together with any other  purchaser(s)  of 8%
Preferred  Stock Series A which may become  party hereto from time to time,  the
"Stockholders").


                                 R E C I T A L S

     WHEREAS,  pursuant to an Agreement and Plan of Merger, dated as of November
7, 1996 (the "Merger Agreement"), between the Company,  CStone-Pittsburgh Trust,
a Maryland  business  trust and a wholly  owned  subsidiary  of the Company (the
"Sub"), Frick Building,  Inc., a Delaware corporation ("Frick"), and the Initial
Stockholder,  Frick  has  merged  with and  into  the  Sub,  with the Sub as the
surviving corporation (the "Merger");

     WHEREAS,  after giving effect to the Merger the Initial Stockholder will be
the holder of 458,621 shares (the "Series A Preferred  Shares") of the Company's
8% Cumulative  Convertible  Preferred Stock Series A, without par value (the "8%
Preferred Stock Series A");

     NOW, THEREFORE,  in consideration of the mutual promises,  representations,
warranties  and  conditions  set forth in this  Agreement,  the parties  hereto,
intending to be legally bound, hereby agree as follows:


                                    ARTICLE I

                                   DEFINITIONS

     SECTION 1.01.  Definitions and References.  For purposes of this Agreement,
in  addition  to the  definitions  set forth  above and  elsewhere  herein,  the
following terms shall have the following respective meanings:

               "Affiliate",  with respect to any Person,  means any other Person
          directly or  indirectly  controlling,  controlled  by or under  common
          control with, such Person. For purposes of this definition,  "control"
          (including  with  correlative   meanings,   the  terms  "controlling",
          "controlled by" or "under common control with"),  as used with respect
          to any Person, shall mean the possession,  directly or indirectly,  of
          the  power to  direct or cause the  direction  of the  management  and
          policies  of such  Person,  whether  through the  ownership  of voting
          securities or by contract or otherwise.



383917.1

<PAGE>




               "Closing Date" means November 7, 1996.

               "Commission"  means the Securities and Exchange  Commission,  and
          any successor commission or agency having similar powers.

               "Common  Stock"  shall  mean the  common  stock  of the  Company,
          without par value.

               "Conversion  Stock"  means the Common  Stock or other  securities
          issued on conversion of the 8% Preferred Stock Series A.

               "8%  Preferred   Stock"  means  the  8%  Cumulative   Convertible
          Preferred Stock of the Company, without par value.

               "Encumbrance" means any lien, security interest,  pledge,  claim,
          or option, right of first refusal,  marital right or other encumbrance
          with  respect to any Series A Preferred  Share or share of  Conversion
          Stock.

               "Minimum  Amount" means,  at any time, the sum of (i) $75 million
          plus (ii) the product of .5618  multiplied  by the stated value of all
          shares of 8% Preferred  Stock issued by the Company prior to such time
          and after November 1, 1996.

               "1933 Act" means the Securities  Act of 1933, as amended,  or any
          similar federal statute,  and, unless the context indicates otherwise,
          the rules and  regulations  of the Commission  thereunder,  all as the
          same shall be in effect at the time.

               "1934 Act" means the Securities Exchange Act of 1934, as amended,
          or any similar  federal  statute,  and,  unless the context  indicates
          otherwise, the rules and regulations of the Commission thereunder, all
          as the same shall be in effect at the time.

               "Person" means an individual,  a partnership,  a joint venture, a
          corporation, an association, a trust, an individual retirement account
          or any other entity or  organization,  including a  government  or any
          department or agency thereof.

               "Public Offering" means an underwritten public offering of Common
          Stock pursuant to an effective  registration  statement under the 1933
          Act and listed on the New York Stock Exchange.




383917.1


                                       -2-

<PAGE>




               "Qualified  Public  Offering"  means a Public  Offering  prior to
          January 1, 2000 in which (i) the aggregate net proceeds to the Company
          (after payment of all fees and expenses of the offering) together with
          the net  proceeds of any prior  Public  Offerings  equal or exceed the
          Minimum Amount and (ii) (a) if the Public Offering is completed in the
          calendar  year 1997,  the initial  public  offering  price is at least
          $16.00  per share,  (b) if the Public  Offering  is  completed  in the
          calendar  year 1998,  the initial  public  offering  price is at least
          $16.50 per share,  or (c) if the Public  Offering is  completed in the
          calendar  year 1999,  the initial  public  offering  price is at least
          $17.00 per share; provided,  however, that a Qualified Public Offering
          shall be deemed to occur on the first  business day which  follows any
          period of 20 trading days after a Public Offering and prior to January
          1, 2000, in which the average of the closing  prices for shares of the
          Common Stock as reported on the New York Stock Exchange composite tape
          equals or exceeds the applicable  minimum price for a Public  Offering
          to be considered a Qualified Public Offering at such time.

               "Register,"  "registered"  and  "registration"  shall  refer to a
          registration effected by preparing and filing a registration statement
          or  similar   document  in  compliance  with  the  1933  Act  and  the
          declaration  or  ordering  of  effectiveness   of  such   registration
          statement or document.

               "Registrable Stock" shall mean (i) the Conversion Stock, (ii) any
          common stock issued as (or issuable upon the conversion or exercise of
          any warrant,  right,  option or other  convertible  security  which is
          issued as) a dividend  or other  distribution  with  respect to, or in
          exchange for, or in replacement  of, the Conversion  Stock,  and (iii)
          any  common  stock  issued by way of a stock  split of the  Conversion
          Stock  referred to in clause (i) or (ii) above.  For  purposes of this
          Agreement,  any Registrable  Stock shall cease to be Registrable Stock
          when (x) a registration  statement covering such Registrable Stock has
          been declared  effective and such Registrable  Stock has been disposed
          of  pursuant  to  such  effective  registration  statement,  (y)  such
          Registrable  Stock is sold by a Person in a  transaction  in which the
          rights under the  provisions of this Agreement are not assigned or (z)
          such  Registrable  Stock may be sold  pursuant  to Rule 144(k) (or any
          similar provision then in force, but not Rule 144A) under the 1933 Act
          without registration under the 1933 Act.

               "Restricted  Stock" means all shares of 8% Preferred Stock Series
          A and Conversion Stock other than (a) shares that have been registered
          under a  registration  statement  pursuant to the 1933 Act, (b) shares
          with  respect  to  which a Sale has been  made in  reliance  on and in
          accordance  with  Rule 144 or (c)  shares  with  respect  to which the
          holder  thereof  shall have  delivered  to the  Company  either (i) an
          opinion,  in  form  and  substance  satisfactory  to the  Company,  of
          counsel, who shall be satisfactory



383917.1


                                       -3-

<PAGE>




         to the Company,  or (ii) a "no action" letter from the  Commission,  to
         the effect  that  subsequent  transfers  of such shares may be effected
         without registration under the 1933 Act.

               "Rule 144" means Rule 144 (or any successor  provision) under the
          1933 Act.

               "Rule  144  Transaction"  means  any Sale of 8%  Preferred  Stock
          Series A or  Conversion  Shares  made in  reliance  on Rule 144 (as in
          effect on the date hereof) which  complies with  paragraphs  (d), (e),
          (f) and (g) thereof (as in effect on the date  hereof),  regardless of
          whether at the time of such sale the seller is  entitled  to rely upon
          paragraph (k) of Rule 144 in connection with the Sale of such shares.

               "Rule 144A" means Rule 144A (or any  successor  provision)  under
          the 1933 Act.

               "Sale"  means  any  sale,  assignment,   transfer,   distribution
          (whether by a  partnership  to any of its  partners or  otherwise)  or
          other  disposition of 8% Preferred Stock Series A or Conversion  Stock
          or of a participation therein.

               "Stockholder"  means each Person  (other than the  Company)  that
          shall be a party to this  Agreement,  whether in  connection  with the
          execution  and  delivery  hereof as of the date  hereof,  pursuant  to
          Section 4.11 or otherwise,  so long as such Person shall  beneficially
          own any shares of the 8% Preferred Stock Series A.


                                   ARTICLE II

                               CERTAIN AGREEMENTS

     SECTION  2.01.  Board of  Directors.  Prior to the  completion  of a Public
Offering in which the  aggregate net proceeds to the Company  (after  payment of
all fees and expenses of the offering) equal or exceed $75,000,000, if requested
by the holders of a majority of the stated  value of all shares of 8%  Preferred
Stock  Series A  outstanding  at such time,  the  Company  shall  recommend  the
election of one director chosen by such holders to the holders of Common Stock.

     SECTION  2.02.  Limitation  on Issuance of 8% Preferred  Stock Series A. So
long as any 8% Preferred  Stock Series A is  outstanding,  the aggregate  stated
value of all shares of 8% Preferred Stock issued by the Company shall not exceed
$150,000,000.




383917.1


                                       -4-

<PAGE>


     SECTION 2.03. Notice of Public Offering.  So long as any 8% Preferred Stock
Series A is outstanding,  the Company shall endeavor to notify the  Stockholders
no  less  than 30 days or more  than  60 days  prior  to the  completion  of any
contemplated Public Offering. Within 15 days thereafter,  each Stockholder shall
inform the Company  whether they intend to convert the 8% Preferred Stock Series
A to Common Stock prior to the completion of the Public Offering.


                                   ARTICLE III

                            RESTRICTIONS ON TRANSFER

     SECTION 3.01.  General  Restrictions.  No  Stockholder  shall,  directly or
indirectly, make or solicit any Sale of, or create, incur, solicit or assume any
Encumbrance  with  respect  to,  any  share of 8%  Preferred  Stock  Series A or
Conversion Stock, except in compliance with the 1933 Act and this Agreement.

     SECTION  3.02.  Legends.  (a) Each  certificate  representing  shares of 8%
Preferred Stock Series A or Conversion Stock shall, except as otherwise provided
in this Section 3.02 or in Section 3.03, be stamped or otherwise  imprinted with
a legend substantially in the following form:

          "THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
          UNDER THE  SECURITIES  ACT OF 1933,  AS AMENDED.  NO  REGISTRATION  OF
          TRANSFER  OF SUCH  SECURITIES  WILL BE MADE ON THE BOOKS OF THE ISSUER
          UNLESS  SUCH  TRANSFER  IS  MADE  IN  CONNECTION   WITH  AN  EFFECTIVE
          REGISTRATION STATEMENT UNDER SUCH ACT OR PURSUANT TO AN EXEMPTION FROM
          THE REGISTRATION REQUIREMENTS OF SUCH ACT OR SUCH ACT DOES NOT APPLY.

          THE SECURITIES  EVIDENCED BY THIS  CERTIFICATE  ARE SUBJECT TO CERTAIN
          RESTRICTIONS  ON TRANSFER AS SET FORTH IN A  STOCKHOLDERS'  AGREEMENT,
          DATED  AS OF  NOVEMBER  7,  1996,  A COPY OF  WHICH  IS ON FILE AT THE
          PRINCIPAL EXECUTIVE OFFICES OF THE ISSUER. NO REGISTRATION OF TRANSFER
          OF SUCH  SECURITIES WILL BE MADE ON THE BOOKS OF THE ISSUER UNLESS AND
          UNTIL SUCH RESTRICTIONS SHALL HAVE BEEN COMPLIED WITH."




383917.1


                                       -5-

<PAGE>


                                                        

          (b) In the event that any  shares of 8%  Preferred  Stock  Series A or
Conversion Stock shall cease to be Restricted Stock, the Company shall, upon the
written  request of the holder  thereof,  issue to such holder a new certificate
evidencing  such shares  without the first  paragraph of the legend  required by
Section 3.02(a) endorsed  thereon.  In the event that any shares of 8% Preferred
Stock Series A or Conversion Stock shall cease to be subject to the restrictions
on transfer set forth in this  Agreement,  the Company  shall,  upon the written
request of the holder thereof, issue to such holder a new certificate evidencing
such shares of 8%  Preferred  Stock  Series A or  Conversion  Stock  without the
second paragraph of the legend required by Section 3.02(a).

     SECTION 3.03. Notice of Proposed Transfer.  Each Stockholder agrees that it
will not, directly or indirectly,  make or solicit any Sale of, or create, incur
or assume any  Encumbrance  with  respect  to, any share of 8%  Preferred  Stock
Series A or Conversion Stock held by such Stockholder unless,  prior to any such
action,  the holder  thereof  shall give  written  notice to the  Company of its
intention.  Each such notice shall describe the manner of the proposed  transfer
and, if requested by the Company,  shall be accompanied by an opinion of counsel
satisfactory  to the Company to the effect  that the  proposed  transfer  may be
effected without  registration  under the 1933 Act, whereupon the holder of such
stock shall be entitled to transfer such stock in  accordance  with the terms of
its notice; provided, however, that no such opinion of counsel shall be required
for a  transfer  to one or more  partners  of the  transferor  (in the case of a
transferor that is a partnership)  or to an Affiliated  corporation (in the case
of a transferor that is a corporation).  Each certificate for 8% Preferred Stock
Series A or Conversion Stock transferred as above provided shall bear the legend
set forth in Section 3.02, except that such certificate shall not bear the first
paragraph  of such  legend  if (i)  such  transfer  is in  accordance  with  the
provisions  of Rule 144 or Rule 144A (or any other rule  permitting  public sale
without registration under the 1933 Act) or (ii) the opinion of counsel referred
to  above  is to the  further  effect  that the  transferee  and any  subsequent
transferee  (other  than an  Affiliate  of the  Company)  would be  entitled  to
transfer such  securities in a public sale without  registration  under the 1933
Act.  The  restrictions  provided  for in this  Section  3.03 shall not apply to
securities  which are not  required  to bear the first  paragraph  of the legend
prescribed by Section 3.02(a) in accordance with the provisions of that Section.

     SECTION 3.04.  Certain Persons to Execute  Agreement.  (a) Each Stockholder
agrees  that it will not  directly  or  indirectly  make any Sale of, or create,
incur or assume any  Encumbrance  with  respect  to, any shares of 8%  Preferred
Stock Series A or Conversion Stock held by such  Stockholder,  unless,  prior to
the  consummation of any such Sale or the creation,  incurrence or assumption of
any such Encumbrance, the Person to whom such Sale is proposed to be made or the
Person in whose favor such  Encumbrance  is proposed to be created,  incurred or
assumed (for purposes of this Section 3.04, a



383917.1


                                       -6-

<PAGE>


                                                      

"Prospective Transferee") (i) executes and delivers to the Company an agreement,
in form and  substance  satisfactory  to the Company,  whereby such  Prospective
Transferee  confirms  that,  with  respect to the shares of 8%  Preferred  Stock
Series A or Conversion  Stock that are the subject of such Sale or  Encumbrance,
it shall be deemed to be a "Stockholder"  for the purposes of this Agreement and
agrees  to be bound by all the  terms of this  Agreement  and (ii)  unless  such
Prospective Transferee is a recognized  institutional investor,  delivers to the
Company  an  opinion  of  counsel,  satisfactory  in form and  substance  to the
Company, to the effect that the agreement referred to above that is delivered by
such  Prospective  Transferee is a legal,  valid and binding  obligation of such
Prospective  Transferee  enforceable  against  such  Prospective  Transferee  in
accordance with its terms.  Upon the execution and delivery by such  Prospective
Transferee  of the  agreement  referred  to in clause (i) of the next  preceding
sentence and, if required, the delivery of the opinion of counsel referred to in
clause (ii) of the next preceding sentence, such Prospective Transferee shall be
deemed a "Stockholder"  for the purposes of this  Agreement,  and shall have the
rights and be subject to the obligations of a Stockholder hereunder with respect
to the shares held by such  Prospective  Transferee  or in respect of which such
Encumbrance shall have been created, incurred or assumed.

          (b)  Anything in this  Section 3.04 or in Section 3.03 to the contrary
notwithstanding,  the  provisions of this Section 3.04 will not be applicable to
(i) any Sale of  shares  of 8%  Preferred  Stock  Series A or  Conversion  Stock
pursuant to a Public  Offering or (ii) any Sale of shares of 8% Preferred  Stock
Series A or  Conversion  Stock in a Rule 144  Transaction  which is  consummated
after the date of a Public Offering.

     SECTION 3.05. Certain  Information.  The Company shall file all reports and
other  information  required  to be filed by Section 13 or 15(d)  under the 1934
Act, as the case may be, as shall be necessary in order that the  conditions  to
the  availability  of Rule 144 in  connection  with any Sale of shares of Common
Stock by a Stockholder shall be met.

     SECTION 3.06.  Improper Sale or  Encumbrance.  Any attempt to make any Sale
of, or create,  incur or assume any Encumbrance with respect to, any share of 8%
Preferred  Stock  Series A or  Conversion  Stock  not in  compliance  with  this
Agreement  shall be null and void and the  Company  shall not give any effect in
the Company's stock records to such attempted Sale or Encumbrance.


                                   ARTICLE IV

                               REGISTRATION RIGHTS




383917.1


                                       -7-

<PAGE>


                                                     

     SECTION 4.01. Request for Registration. (a) On and after the earlier of (i)
the date which is six months after the date the registration  statement filed by
the Company  covering a Public  Offering shall have become  effective,  and (ii)
December 31, 2000 if a Qualified  Public  Offering shall not have been completed
on or prior to such  date,  the  Stockholders  of all of the  Registrable  Stock
issued or issuable  upon  conversion  of the 8%  Preferred  Stock  Series A (the
"Initiating  Holders")  may request in a written  notice that the Company file a
registration statement under the 1933 Act (or a similar document pursuant to any
other  statute  then in  effect  corresponding  to the 1933  Act)  covering  the
registration of any or all Registrable Stock held by such Initiating  Holders in
the manner  specified  in such notice,  provided  that there must be included in
such registration at least 100% of the Registrable Stock issued or issuable upon
conversion of the 8% Preferred  Stock Series A (or any lesser  percentage if the
anticipated  aggregate  offering  proceeds from the Registrable  Stock and other
shares  to be  offered  under  such  registration  statement  would  exceed  $75
million). Following receipt of any notice under this Section 4.01(a) the Company
shall (x)  within 20 days  notify  all other  Stockholders  of such  request  in
writing and (y) use its best  efforts to cause to be  registered  under the 1933
Act  all  Registrable   Stock  that  the  Initiating   Holders  and  such  other
Stockholders  have,  within ten days after the  Company  has given such  notice,
requested be registered in accordance  with the manner of disposition  specified
in such notice by the Initiating Holders.

          (b) If the  Initiating  Holders intend to have the  Registrable  Stock
distributed by means of an underwritten offering, the Company shall include such
information in the written notice  referred to in clause (x) of Section  4.01(a)
above.  In such event,  the right of any  Stockholder to include its Registrable
Stock  in  such  registration  shall  be  conditioned  upon  such  Stockholder's
participation  in  such   underwritten   offering  and  the  inclusion  of  such
Stockholder's  Registrable Stock in the underwritten  offering (unless otherwise
mutually  agreed by a majority in interest  of the  Initiating  Holders and such
Stockholder)  to the  extent  provided  below.  All  Stockholders  proposing  to
distribute Registrable Stock through such underwritten offering shall enter into
an   underwriting   agreement  in  customary   form  with  the   underwriter  or
underwriters.  Such underwriter or underwriters  shall be selected by a majority
in interest  of the  Initiating  Holders  and shall be approved by the  Company,
which  approval  shall  not be  unreasonably  withheld.  If any  Stockholder  of
Registrable Stock disapproves of the terms of the underwriting, such Stockholder
may  elect to  withdraw  all its  Registrable  Stock by  written  notice  to the
Company,  the managing underwriter and the Initiating Holders. The securities so
withdrawn shall also be withdrawn from registration.

          (c) Notwithstanding any provision of this Agreement to the contrary,

               (i) the Company  shall not be  required to effect a  registration
          pursuant to this Section 4.01 during the period starting with the date
          of filing by the Company of,



383917.1


                                       -8-

<PAGE>


                                                      

          and  ending  on a date 120 days  following  the  effective  date of, a
          registration  statement  pertaining to a public offering of securities
          for  the   account  of  the  Company  or  on  behalf  of  the  selling
          stockholders under any other  registration  rights agreement which the
          Stockholders  have been  entitled to join  pursuant  to Section  4.02;
          provided  that the  Company  shall  actively  employ in good faith all
          reasonable  efforts to cause  such  registration  statement  to become
          effective as soon as possible; and

               (ii)  if  the  Company  shall  furnish  to  such  Stockholders  a
          certificate signed by the President of the Company stating that in the
          good  faith  opinion of the board of  directors  of the  Company  such
          registration would interfere with any material  transaction then being
          pursued by the Company,  then the Company's obligation to use its best
          efforts  to file a  registration  statement  shall be  deferred  for a
          period not to exceed 120 days.

          (d) The Company shall not be obligated to effect and pay for more than
one  registration  pursuant to this  Section 4.01 prior to the  completion  of a
Public Offering and more than three registrations  pursuant to this Section 4.01
after  the  completion  of a  Public  Offering;  provided  that  a  registration
requested  pursuant  to this  Section  4.01  shall  not be  deemed  to have been
effected for purposes of this Section  4.01(d)  unless (i) it has been  declared
effective by the Commission,  (ii) it has remained  effective for the period set
forth in Section 4.03(a),  (iii)  Stockholders of Registrable  Stock included in
such  registration  have not withdrawn  sufficient shares from such registration
such that the remaining holders requesting registration would not have been able
to request  registration under the provisions of Section 4 and (iv) the offering
of Registrable  Stock pursuant to such  registration  is not subject to any stop
order,  injunction or other order or requirement  of the Commission  (other than
any such stop order, injunction, or other requirement of the Commission prompted
by any act or omission of Stockholders of Registrable Stock).

     SECTION 4.02. Incidental  Registration.  Subject to Section 4.06, if at any
time the Company  determines  that it shall file a registration  statement under
the 1933 Act (other than a registration statement on Form S-4 or S-8 or filed in
connection  with an exchange  offer or an offering of  securities  solely to the
Company's  existing  stockholders)  on any  form  that  would  also  permit  the
registration  of the  Registrable  Stock and such  filing is to be on its behalf
and/or  on  behalf  of  selling  holders  of  its  securities  for  the  general
registration  of its common  stock to be sold for cash,  the Company  shall each
such time promptly give each  Stockholder  written notice of such  determination
setting forth the date on which the Company  proposes to file such  registration
statement,  which date  shall be no  earlier  than 60 days from the date of such
notice,  and advising each  Stockholder of its right to have  Registrable  Stock
included  in such  registration.  Upon the  written  request of any  Stockholder
received by the Company no later than 30 days after the date of the Company's



383917.1


                                       -9-

<PAGE>



notice,  the Company shall use its best efforts to cause to be registered  under
the 1933 Act all of the  Registrable  Stock  that each such  Stockholder  has so
requested  to be  registered.  If,  in  the  written  opinion  of  the  managing
underwriter  (or,  in the case of a  non-underwritten  offering,  in the written
opinion  of  the  Company),  the  total  amount  of  such  securities  to  be so
registered,  including such Registrable Stock, will exceed the maximum amount of
the Company's securities which can be marketed (i) at a price reasonably related
to the then current market value of such securities,  or (ii) without  otherwise
materially and adversely  affecting the entire offering,  then the Company shall
be entitled to reduce the number of shares of Registrable Stock to not less than
one-third of the total number of shares in such  offering  except in the case of
the initial firm  commitment  underwritten  public  offering of the Company,  in
which  case the  managing  underwriter  may  reduce  the  number  of  shares  of
Registrable  Stock to be included in such offering to zero. Such reduction shall
be  allocated   among  all  such   Stockholders  in  proportion  (as  nearly  as
practicable) to the amount of Registrable Stock owned by each Stockholder at the
time of filing the registration statement.

     SECTION 4.03.  Obligations of the Company.  Whenever required under Section
4.01 to use its best  efforts  to effect  the  registration  of any  Registrable
Stock, the Company shall, as expeditiously as possible:

               (a) prepare and file with the Commission a registration statement
          with  respect to such  Registrable  Stock and use its best  efforts to
          cause such  registration  statement to become and remain effective for
          the period of the  distribution  contemplated  thereby  determined  as
          provided hereafter;

               (b)  prepare and file with the  Commission  such  amendments  and
          supplements to such registration  statement and the prospectus used in
          connection therewith as may be necessary to comply with the provisions
          of the 1933 Act with  respect to the  disposition  of all  Registrable
          Stock covered by such registration statement;

               (c)  furnish to the  Stockholders  such  numbers of copies of the
          registration  statement and the prospectus included therein (including
          each preliminary  prospectus and any amendments or supplements thereto
          in  conformity  with the  requirements  of the 1933 Act and such other
          documents and information as they may reasonably request);

               (d) use its best  efforts to register or qualify the  Registrable
          Stock  covered  by  such  registration   statement  under  such  other
          securities  or blue sky laws of such  jurisdictions  within the United
          States  and Puerto  Rico as shall be  reasonably  appropriate  for the
          distribution of the Registrable Stock covered by the registration



383917.1


                                      -10-

<PAGE>


                                                     

          statement;  provided,  however, that the Company shall not be required
          in  connection  therewith  or as a condition  thereto to qualify to do
          business in or to file a general  consent to service of process in any
          jurisdiction  wherein  it would not but for the  requirements  of this
          paragraph  (d) be obligated  to do so; and  provided  further that the
          Company shall not be required to qualify such Registrable Stock in any
          jurisdiction  in which the securities  regulatory  authority  requires
          that any Stockholder submit any shares of its Registrable Stock to the
          terms,  provisions and  restrictions of any escrow,  lockup or similar
          agreement(s)   for   consent  to  sell   Registrable   Stock  in  such
          jurisdiction unless such Stockholder agrees to do so;

               (e)  promptly  notify each  Stockholder  with  Registrable  Stock
          covered by such registration  statement, at any time when a prospectus
          relating  thereto is required to be  delivered  under the 1933 Act, of
          the  happening  of any  event as a  result  of  which  the  prospectus
          included in such registration  statement,  as then in effect, includes
          an untrue  statement of a material fact or omits to state any material
          fact required to be stated therein or necessary to make the statements
          therein not misleading in light of the circumstances  under which they
          were made, and at the request of any such Stockholder promptly prepare
          and furnish to such Stockholder a reasonable  number of copies of such
          supplement  to or amendment of such  prospectus as may be necessary so
          that, as thereafter  delivered to the  purchasers of such  securities,
          such  prospectus  shall not include an untrue  statement of a material
          fact or omit to state a material fact required to be stated therein or
          necessary to make the  statements  therein not  misleading in light of
          the circumstances under which they were made;

               (f)  furnish,  at  the  request  of  any  Stockholder  requesting
          registration  of  Registrable  Stock  pursuant to Section 4.01, if the
          method of  distribution  is by means of an  underwriting,  on the date
          that the shares of Registrable Stock are delivered to the underwriters
          for sale pursuant to such  registration,  or if such Registrable Stock
          is  not  being  sold  through  underwriters,  on  the  date  that  the
          registration  statement  with  respect to such  shares of  Registrable
          Stock becomes effective, (1) a signed opinion, dated such date, of the
          independent legal counsel  representing the Company for the purpose of
          such registration,  addressed to the underwriters, if any, and if such
          Registrable Stock is not being sold through underwriters,  then to the
          Stockholders   making  such  request,  as  to  such  matters  as  such
          underwriters or the Stockholders holding a majority of the Registrable
          Stock  included  in  such  registration,  as  the  case  may  be,  may
          reasonably  request and as would be customary  in such a  transaction;
          and (2)  letters  dated such date and the date the  offering is priced
          from the  independent  certified  public  accountants  of the Company,
          addressed to the  underwriters,  if any, and if such Registrable Stock
          is not being sold through underwriters, then to the



383917.1


                                      -11-

<PAGE>


                                                    

          Stockholders  making such request and, if such  accountants  refuse to
          deliver  such  letters to such  Stockholders,  then to the Company (i)
          stating that they are independent  certified public accountants within
          the  meaning  of the  1933  Act  and  that,  in the  opinion  of  such
          accountants,  the financial statements and other financial data of the
          Company included in the registration  statement or the prospectus,  or
          any amendment or supplement thereto, comply as to form in all material
          respects with the applicable  accounting  requirements of the 1933 Act
          and (ii) covering such other financial matters (including  information
          as to the period  ending not more than five business days prior to the
          date of such letters) with respect to the  registration  in respect of
          which  such  letter  is  being  given  as  such  underwriters  or  the
          Stockholders  holding a majority of the Registrable  Stock included in
          such  registration,  as the case may be, may reasonably request and as
          would be customary in such a transaction;

               (g) enter into customary  agreements  (including if the method of
          distribution is by means of an underwriting, an underwriting agreement
          in  customary  form) and take such  other  actions  as are  reasonably
          required in order to expedite or  facilitate  the  disposition  of the
          Registrable Stock to be so included in the registration statement;

               (h) otherwise use its best efforts to comply with all  applicable
          rules and  regulations  of the  Commission,  and make available to its
          security  holders,  as soon as reasonably  practicable,  but not later
          than 18 months after the effective date of the registration statement,
          an  earnings  statement  covering  the  period  of at least 12  months
          beginning  with the first full month after the effective  date of such
          registration  statement,  which earnings  statements shall satisfy the
          provisions of Section 11(a) of the 1933 Act; and

               (i) use its best efforts to list the Registrable Stock covered by
          such registration statement with the New York Stock Exchange.

For purposes of Sections  4.03(a) and  4.03(b),  the period of  distribution  of
Registrable  Stock in a firm  commitment  underwritten  public offering shall be
deemed to extend until each  underwriter  has completed the  distribution of all
securities  purchased by it, and the period of distribution of Registrable Stock
in any other  registration  shall be deemed to extend  until the  earlier of the
sale of all Registrable Stock covered thereby and six months after the effective
date thereof.

     SECTION 4.04. Furnish Information. It shall be a condition precedent to the
obligations  of the Company to take any action  pursuant to this  Agreement that
the  Stockholders  shall  furnish  to the  Company  such  information  regarding
themselves,  the  Registrable  Stock held by them,  and the  intended  method of
disposition of such securities as



383917.1


                                      -12-

<PAGE>




the Company shall reasonably request and as shall be required in connection with
the action to be taken by the Company.

     SECTION 4.05. Expenses of Registration. All expenses incurred in connection
with  each  registration  pursuant  to  Section  4.01 and  Section  4.02 of this
Agreement,  excluding  underwriters'  discounts and  commissions,  but including
without  limitation  all  registration,  filing  and  qualification  fees,  word
processing,  duplicating,  printers' and accounting fees (including the expenses
of any special audits or "cold comfort"  letters required by or incident to such
performance  and  compliance),  fees of the National  Association  of Securities
Dealers,  Inc. or listing fees,  messenger and delivery  expenses,  all fees and
expenses  of  complying  with  state  securities  or blue  sky  laws,  fees  and
disbursements of counsel for the Company,  and the fees and disbursements of one
counsel for the selling  Stockholders  (which  counsel  shall be selected by the
Stockholders  holding a majority  in  interest  of the  Registrable  Stock being
registered),  shall  be  paid  by the  Company;  provided,  however,  that  if a
registration  request pursuant to Section 4.01 of this Agreement is subsequently
withdrawn  at  the  request  of  the  Stockholders  of a  number  of  shares  of
Registrable Stock such that the remaining Stockholders  requesting  registration
would not have been able to request registration under the provisions of Section
4.01 of this Agreement,  such withdrawing  Stockholders shall bear such expenses
unless such withdrawing  Stockholders shall forfeit their right to one requested
registration pursuant to Section 4.01 of this Agreement.  The Stockholders shall
bear and pay the underwriting commissions and discounts applicable to securities
offered for their  account in  connection  with any  registrations,  filings and
qualifications made pursuant to this Agreement.

     SECTION  4.06.   Underwriting   Requirements.   In   connection   with  any
underwritten  offering,  the Company shall not be required under Section 4.02 to
include shares of Registrable  Stock in such  underwritten  offering  unless the
Stockholders  holding such shares of  Registrable  Stock accept the terms of the
underwriting of such offering that have been reasonably  agreed upon between the
Company and the underwriters selected by the Company.

     SECTION 4.07.  Rule 144  Information.  With a view to making  available the
benefits of certain rules and  regulations  of the  Commission  which may at any
time permit the sale of the Registrable Stock to the public without registration
the Company agrees to:

               (i) use its best efforts to file with the  Commission in a timely
          manner all reports and other  documents  required of the Company under
          the 1934 Act; and

               (ii)  furnish  to  each  Stockholder  holding  Registrable  Stock
          forthwith  upon  request a written  statement by the Company as to its
          compliance with the reporting



383917.1


                                      -13-

<PAGE>



          requirements  of the 1934  Act,  a copy of the most  recent  annual or
          quarterly report of the Company,  and such other reports and documents
          so filed by the Company as such Stockholder may reasonably  request in
          availing  itself of any rule or regulation of the Commission  allowing
          such Stockholder to sell any Registrable Stock without registration.

     SECTION  4.08.  Indemnification.  In the  event  any  Registrable  Stock is
included in a registration statement under this Agreement:

               (a)  The  Company   shall   indemnify   and  hold  harmless  each
          Stockholder,  such Stockholder's  directors and officers,  each person
          who participates in the offering of such Registrable Stock,  including
          underwriters  (as defined in the 1933 Act),  and each person,  if any,
          who controls  such  Stockholder  or  participating  person  within the
          meaning  of the 1933 Act,  against  any  losses,  claims,  damages  or
          liabilities,  joint or several, to which they may become subject under
          the 1933 Act or otherwise,  insofar as such losses, claims, damages or
          liabilities  (or  proceedings in respect  thereof) arise out of or are
          based on any untrue or alleged  untrue  statement of any material fact
          contained in such registration statement on the effective date thereof
          (including any  prospectus  filed under Rule 424 under the 1933 Act or
          any  amendments or  supplements  thereto) or arise out of or are based
          upon the omission or alleged omission to state therein a material fact
          required  to be stated  therein or  necessary  to make the  statements
          therein not  misleading,  and shall  reimburse each such  Stockholder,
          such Stockholder's  directors and officers,  such participating person
          or  controlling  person  for any  legal or other  expenses  reasonably
          incurred by them (but not in excess of expenses incurred in respect of
          one  counsel  for all of them  unless  there is an actual  conflict of
          interest between any indemnified  parties,  which indemnified  parties
          may  be   represented   by  separate   counsel)  in  connection   with
          investigating or defending any such loss, claim, damage,  liability or
          action;  provided,  however, that the indemnity agreement contained in
          this Section  4.08(a) shall not apply to amounts paid in settlement of
          any such loss, claim,  damage,  liability or action if such settlement
          is effected without the consent of the Company;  provided further that
          the Company shall not be liable to any Stockholder, such Stockholder's
          directors and officers,  participating person or controlling person in
          any such case for any such loss, claim, damage, liability or action to
          the extent that it arises out of or is based upon an untrue  statement
          or alleged  untrue  statement or omission or alleged  omission made in
          connection with such registration  statement,  preliminary prospectus,
          final  prospectus or amendments or  supplements  thereto,  in reliance
          upon and in conformity with written  information  furnished  expressly
          for use in connection with such  registration by any such Stockholder,
          such  Stockholder's  directors and officers,  participating  person or
          controlling person. Such indemnity shall remain in full force



383917.1


                                      -14-

<PAGE>


                                                        15

          and effect regardless of any investigation made by or on behalf of any
          such   Stockholder,   such   Stockholder's   directors  and  officers,
          participating  person or  controlling  person,  and shall  survive the
          transfer of such securities by such Stockholder.

               (b) Each  Stockholder  requesting  or joining  in a  registration
          severally  and not  jointly  shall  indemnify  and hold  harmless  the
          Company, each of its directors and officers,  each person, if any, who
          controls  the  Company  within the  meaning of the 1933 Act,  and each
          agent and any  underwriter  for the Company (within the meaning of the
          1933 Act) against any losses, claims, damages or liabilities, joint or
          several,  to  which  the  Company  or  any  such  director,   officer,
          controlling person, agent or underwriter may become subject, under the
          1933 Act or  otherwise,  insofar as such  losses,  claims,  damages or
          liabilities  (or  proceedings in respect  thereof) arise out of or are
          based upon any untrue  statement  or alleged  untrue  statement of any
          material  fact  contained  in  such  registration   statement  on  the
          effective date thereof  (including any prospectus filed under Rule 424
          under the 1933 Act or any amendments or supplements  thereto) or arise
          out of or are based upon the  omission  or alleged  omission  to state
          therein a material fact required to be stated  therein or necessary to
          make  the  statements  therein  not  misleading,  in each  case to the
          extent, but only to the extent,  that such untrue statement or alleged
          untrue  statement  or  omission or alleged  omission  was made in such
          registration statement, preliminary or final prospectus, or amendments
          or  supplements  thereto,  in  reliance  upon and in  conformity  with
          written  information  furnished  by or on behalf  of such  Stockholder
          expressly for use in connection with such registration;  and each such
          Stockholder  shall  reimburse any legal or other  expenses  reasonably
          incurred by the  Company or any such  director,  officer,  controlling
          person,  agent or underwriter (but not in excess of expenses  incurred
          in respect of one counsel  for all of them  unless  there is an actual
          conflict  of  interest   between  any   indemnified   parties,   which
          indemnified  parties  may  be  represented  by  separate  counsel)  in
          connection  with  investigating  or  defending  any such loss,  claim,
          damage,  liability or action;  provided,  however,  that the indemnity
          agreement contained in this Section 4.08(b) shall not apply to amounts
          paid in  settlement  of any such loss,  claim,  damage,  liability  or
          action if such  settlement  is  effected  without  the consent of such
          Stockholder  (which consent shall not be unreasonably  withheld),  and
          provided  further  that the  liability of each  Stockholder  hereunder
          shall be limited to the  proportion of any such loss,  claim,  damage,
          liability  or expense  which is equal to the  proportion  that the net
          proceeds  from the sale of the shares sold by such  Stockholder  under
          such  registration  statement bears to the total net proceeds from the
          sale of all securities sold thereunder, but not in any event to exceed
          the  net  proceeds  received  by such  Stockholder  from  the  sale of
          Registrable Stock covered by such registration statement.



383917.1


                                      -15-

<PAGE>


                                                        16


               (c) Promptly  after  receipt by an  indemnified  party under this
          Section of notice of the commencement of any action,  such indemnified
          party shall,  if a claim in respect  thereof is to be made against any
          indemnifying  party under this Section,  notify the indemnifying party
          in writing of the  commencement  thereof  and the  indemnifying  party
          shall have the right to participate in and assume the defense  thereof
          with  counsel  selected  by  the  indemnifying  party  and  reasonably
          satisfactory  to the indemnified  party;  provided,  however,  that an
          indemnified party shall have the right to retain its own counsel, with
          all fees and expenses  thereof to be paid by such  indemnified  party,
          and to be apprised of all  progress in any  proceeding  the defense of
          which has been  assumed  by the  indemnifying  party.  The  failure to
          notify an indemnifying  party promptly of the commencement of any such
          action, if and to the extent prejudicial to its ability to defend such
          action,  shall relieve such indemnifying party of any liability to the
          indemnified  party under this  Section,  but the omission so to notify
          the  indemnifying  party will not relieve it of any liability  that it
          may have to any indemnified party otherwise than under this Section.

               (d) To the extent any indemnification by an indemnifying party is
          prohibited  or  limited by law,  the  indemnifying  party,  in lieu of
          indemnifying  such indemnified  party,  shall contribute to the amount
          paid or payable by such indemnified  party as a result of such losses,
          claims, damages or liabilities in such proportion as is appropriate to
          reflect the relative fault of the  indemnifying  party and indemnified
          party in connection  with the actions  which  resulted in such losses,
          claims,  damages  or  liabilities,  as  well  as  any  other  relevant
          equitable  considerations.  The  relative  fault of such  indemnifying
          party and indemnified party shall be determined by reference to, among
          other things, whether any action in question,  including any untrue or
          alleged  untrue  statement  of  material  fact or  omission or alleged
          omission  to state a  material  fact,  has been made by, or relates to
          information supplied by, such indemnifying party or indemnified party,
          and the parties' relative intent, knowledge, access to information and
          opportunity  to correct or prevent  such  action.  The amount  paid or
          payable  by a party as a result  of the  losses,  claims,  damages  or
          liabilities  referred to above shall be deemed to include any legal or
          other fees or expenses reasonably incurred by such party in connection
          with any investigation or proceeding.

     The  parties  hereto  agree  that it  would  not be just and  equitable  if
contribution  pursuant  to this  Section  4.08(d)  were  determined  by pro rata
allocation or by any other method of  allocation  which does not take account of
the equitable considerations referred to in the immediately preceding paragraph.
No person guilty of fraudulent  misrepresentation (within the meaning of Section
11(f) of the 1933 Act) shall be entitled to contribution from any person who was
not guilty of such fraudulent misrepresentation.




383917.1


                                      -16-

<PAGE>




     SECTION 4.09. Limitation on Registration Rights.  Notwithstanding any other
provisions of this Agreement to the contrary,  the Company shall not be required
to register  any  Registrable  Stock under this  Agreement  with  respect to any
request or requests made by any Stockholder after December 31, 2005.

     SECTION 4.10.  Lock-up.  Each  Stockholder  shall,  in connection  with any
registration of the Company's securities, upon the request of the Company or the
underwriters  managing any  underwritten  offering of the Company's  securities,
agree in writing  not to effect any sale,  disposition  or  distribution  of any
Registrable  Stock (other than that  included in the  registration)  without the
prior written consent of the Company or such  underwriters,  as the case may be,
for such  period of time from the  effective  date of such  registration  as the
Company or the underwriters may specify;  provided,  however, that all executive
officers and  directors of the Company  shall also have agreed not to effect any
sale,   disposition  or  distribution   of  any  Registrable   Stock  under  the
circumstances and pursuant to the terms set forth in this Section 4.10.

     SECTION 4.11.  Transfer of Registration  Rights. The registration rights of
any Stockholder  under this Agreement with respect to any Registrable  Stock may
be transferred to (a) any transferee of such  Registrable  Stock who acquires at
least 50% of such Stockholder's  shares of Registrable Stock (adjusted for stock
splits and stock  consolidations  after the effective date of this Agreement) or
(b)  an  Affiliate  of  such  Stockholder;   provided,  however,  that  (i)  the
transferring  Stockholder  shall give the Company  written notice at or prior to
the time of such  transfer  stating the name and address of the  transferee  and
identifying the securities with respect to which the rights under this Agreement
are being transferred;  (ii) such transferee shall agree in writing, in form and
substance  reasonably  satisfactory to the Company, to be bound as a Stockholder
by the  provisions  of this  Agreement;  and (iii)  immediately  following  such
transfer  the further  disposition  of such  securities  by such  transferee  is
restricted  under the 1933 Act.  Except as set forth in this  Section  4.11,  no
transfer of Registrable  Stock shall cause such  Registrable  Stock to lose such
status.

                                    ARTICLE V

                                  MISCELLANEOUS

     SECTION 5.01.  Termination.  This  Agreement  shall  terminate on the tenth
anniversary of the execution and delivery hereof.




383917.1


                                      -17-

<PAGE>




     SECTION 5.02.  Representations.  Each of the parties hereto represents that
this  Agreement  has been duly  authorized,  executed  and  delivered  by it and
constitutes its legal, valid and binding  obligation,  enforceable against it in
accordance with its terms.

     SECTION  5.03.  Specific   Performance.   The  parties  hereto  agree  that
irreparable  damage would occur in the event any provision of this Agreement was
not performed in accordance  with the terms hereof and that the parties shall be
entitled to specific  performance of the terms hereof,  in addition to any other
remedy at law or equity.

     SECTION 5.04.  Amendments  and Waivers.  Any term of this  Agreement may be
amended and the observance of any such term may be waived  (either  generally or
in a particular  instance and either  retroactively or prospectively)  only with
the written consent of (a) the Company and (b) Stockholders holding shares of 8%
Preferred Stock Series A representing 80% of the then  outstanding  shares of 8%
Preferred Stock Series A held by all the Stockholders. Each Stockholder shall be
bound by any amendment or waiver authorized by this Section 5.04, whether or not
such Stockholder shall have consented thereto.

     SECTION 5.05. Benefit; Successors and Assigns. Except as otherwise provided
herein,  this Agreement  shall be binding upon and shall inure to the benefit of
the  parties  hereto and their  respective  successors  and  permitted  assigns;
provided,  however,  that this  Agreement  shall not inure to the benefit of any
Prospective  Transferee  unless such Prospective  Transferee shall have complied
with the terms of  Section  3.04.  No  Stockholder  may assign any of its rights
hereunder  to any Person  other than a  transferee  that has  complied  with the
requirements of Section 3.04 in all respects.  Nothing in this Agreement  either
express or implied is  intended  to confer on any person  other than the parties
hereto and their  respective  successors  and  permitted  assigns,  any  rights,
remedies or obligations under or by reason of this Agreement.

     SECTION  5.06.  Governing  Law.  This  Agreement  shall be  governed by and
construed in accordance with the laws of the State of New York.

     SECTION 5.07.  Counterparts.  This Agreement may be executed in two or more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

     SECTION 5.08. Titles. The titles of the Sections of this Agreement are used
for convenience  only and are not to be considered in construing or interpreting
this Agreement.




383917.1


                                      -18-

<PAGE>




     SECTION  5.09.  Notices.  Any  notice  required  or  permitted  under  this
Agreement  shall be in  writing  and shall be  delivered  in person or mailed by
certified or registered  mail,  return  receipt  requested,  or  transmitted  by
telecopier,  directed  to (a) the  Company at the  address  set forth  below its
signature hereof or (b) to a Stockholder at the address therefor as set forth in
the Company's records or at the address set forth below its signature hereof or,
in any such  case,  at such  other  address  or  addresses  as shall  have  been
furnished  in  writing  by such  party to the  others.  The giving of any notice
required hereunder may be waived in writing by the parties hereto.  Every notice
or other  communication  hereunder  shall be deemed  to have been duly  given or
served  on the  date on which  personally  delivered,  or on the  date  actually
received, if sent by mail or telecopier, with receipt acknowledged.

     SECTION 5.10. Severability. If one or more provisions of this Agreement are
held to be unenforceable under applicable law, such provisions shall be excluded
from this Agreement and the balance of this Agreement shall be interpreted as if
such provisions were so excluded and shall be enforceable in accordance with its
terms.

     SECTION  5.11.  Entire  Agreement.  All  prior  agreements  of the  parties
concerning the subject matter of this Agreement are expressly superseded by this
Agreement.   This  Agreement  contains  the  entire  Agreement  of  the  parties
concerning the subject matter hereof. Any oral  representations or modifications
of this Agreement shall be of no effect.




383917.1


                                      -19-

<PAGE>

                                                      
     IN WITNESS  WHEREOF,  the parties hereto have executed this Agreement as of
the date first above written.


                              CORNERSTONE PROPERTIES INC.


                              By:________________________________________
                                 Name:
                                 Title:

                              Address For Notices:
                              126 East 56th Street
                              New York, NY 10022
                              Attention:________________________________
                              Telecopier: (212) 605-7199


                              HEXALON REAL ESTATE, INC.


                              By:________________________________________
                                 Name:
                                 Title:


                              Address For Notices:
                              950 East Paces Ferry Road, Suite 2275
                              Atlanta, GA 30326-1119
                              Attention:_________________________________
                              Telecopier: (404) 239-6096




383917.1


                                      -20-






                 CERTIFICATE OF THE DESIGNATIONS, VOTING POWERS,
              PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL AND
             OTHER SPECIAL RIGHTS AND QUALIFICATIONS, LIMITATIONS OR
           RESTRICTIONS OF 8% CUMULATIVE CONVERTIBLE PREFERRED STOCK,
                     SERIES A OF CORNERSTONE PROPERTIES INC.


     The  undersigned  hereby  certify that they are the duly elected and acting
Executive Vice President and Secretary of CORNERSTONE  PROPERTIES INC., a Nevada
corporation (the "Corporation"), and pursuant to Nev. Rev. Stat. ss. 78.1955, DO
HEREBY CERTIFY:

     That,  pursuant to authority  conferred  upon the Board of Directors of the
Corporation by ARTICLE 4 of the Amended and Restated  Articles of  Incorporation
(the "Articles") and conferred upon the Administrative Committee by the Board of
Directors,  the  Administrative  Committee  of the  Board  of  Directors  of the
Corporation  by unanimous  written  consent  dated  November 7, 1996 adopted the
following  resolution  creating a series of  Preferred  Stock  designated  as 8%
Cumulative Convertible Preferred Stock, Series A:

     RESOLVED,  that pursuant to the authority  expressly vested in the Board of
Directors in accordance with the provisions of its Articles of Incorporation,  a
series of  Preferred  Stock of the  Corporation,  without  par value,  be and it
hereby is,  created and that the  designation  and amount thereof and the voting
powers,  preferences,  and relative rights of the shares of such series, and the
limitations and restrictions thereof, are as follows:

     I.  Designation  and Amount;  Fractional  Shares.  The designation for such
series of the  Preferred  Stock  authorized by this  resolution  shall be the 8%
Cumulative  Convertible  Preferred  Stock,  Series A, without par value,  with a
stated  value of $145.00 per share (the "8%  Preferred  Stock,  Series A").  The
stated value per share of 8% Preferred Stock, Series A shall not for any purpose
be considered to be a  determination  by the Board of Directors  with respect to
the capital and surplus of the  Corporation.  The maximum number of shares of 8%
Preferred Stock, Series A shall be 458,621.  The 8% Preferred Stock, Series A is
issuable in whole shares only.

     II.  Dividends.  Holders of shares of 8% Preferred Stock,  Series A will be
entitled to receive,  when,  as and if declared by the Board of Directors out of
assets of the Corporation legally available for payment,  cash dividends payable
quarterly  at the rate of 8% per annum.  Dividends  on the 8%  Preferred  Stock,
Series A will be  payable  quarterly  on March  31,  June 30,  September  30 and
December  31 (the  "dividend  payment  dates").  Dividends  on  shares of the 8%
Preferred  Stock,  Series A will be cumulative from the date of initial issuance
of such shares of 8% Preferred  Stock,  Series A. Dividends will be payable,  in
arrears,  to  holders  of  record  as they  appear  on the  stock  books  of the
Corporation on such



384442.1

<PAGE>



record dates,  not more than 60 days nor less than 10 days preceding the payment
dates  thereof,  as shall be fixed by the  Board of  Directors.  The  amount  of
dividends  payable for each full  dividend  period shall be computed by dividing
the annual  dividend  payment by four.  The amount of dividends  payable for the
initial  dividend  period or any period  shorter or longer than a full  dividend
period  shall be  calculated  on the  basis of a 360-day  year of twelve  30-day
months.  No  dividends  may be  declared or paid or set apart for payment on any
Parity  Preferred Stock (as defined in paragraph 12(a) below) with regard to the
payment of dividends  unless there shall also be or have been  declared and paid
or set apart for payment on the 8% Preferred Stock, Series A, like dividends for
all dividend  payment periods of the 8% Preferred  Stock,  Series A ending on or
before the dividend  payment  date of such Parity  Preferred  Stock,  ratably in
proportion to the respective  amounts of dividends (x) accumulated and unpaid or
payable on such Parity Preferred Stock, on the one hand, and (y) accumulated and
unpaid through the dividend payment period or periods of the 8% Preferred Stock,
Series A next  preceding  such dividend  payment  date,  on the other hand.  All
dividends  payable in respect of the 8% Preferred  Stock,  Series A will, to the
extent  permitted  under the  Internal  Revenue  Code of 1986,  as amended  (the
"Code") and not  preferential  within the meaning of Section 562(c) of the Code,
be paid first out of earnings and profits  (within the meaning of Section 316 of
the Code) other than  earnings and profits  attributable  to gains from sales or
exchanges  of United  States  real  property  interests  (within  the meaning of
Section 897 of the Code).

     Except as set  forth in the  preceding  sentence,  unless  full  cumulative
dividends  on the 8%  Preferred  Stock,  Series A have been paid,  no  dividends
(other than in Common Stock of the  Corporation) may be paid or declared and set
aside for  payment or other  distribution  made upon the Common  Stock or on any
other  stock of the  Corporation  ranking  junior to or on a parity  with the 8%
Preferred Stock, Series A as to dividends, nor may any Common Stock or any other
stock of the Corporation  ranking junior to or on a parity with the 8% Preferred
Stock, Series A as to dividends be redeemed, purchased or otherwise acquired for
any consideration (or any payment be made to or available for a sinking fund for
the redemption of any shares of such stock;  provided,  however, that any moneys
theretofore deposited in any sinking fund with respect to any Preferred Stock of
the  Corporation  in  compliance  with the  provisions  of such sinking fund may
thereafter be applied to the purchase or redemption of such  Preferred  Stock in
accordance  with the terms of such sinking  fund,  regardless  of whether at the
time of  such  application  full  cumulative  dividends  upon  shares  of the 8%
Preferred  Stock,  Series A outstanding to the last dividend  payment date shall
have  been paid or  declared  and set apart  for  payment)  by the  Corporation;
provided  further  that any such junior stock or Parity  Preferred  Stock or the
Common Stock may be converted  into or  exchanged  for stock of the  Corporation
ranking  junior  to the 8%  Preferred  Stock,  Series  A as to  dividends;  and,
provided  further,  that any such junior stock or Parity  Preferred Stock or the
Common Stock may be purchased  by the  Corporation  pursuant to Article 8 of the
Restated  Articles of  Incorporation to preserve the  Corporation's  status as a
real estate investment trust.



384442.1


                                       -2-

<PAGE>




     III.  Liquidation  Preference.  The shares of 8% Preferred Stock,  Series A
shall rank, as to  liquidation,  dissolution  or winding up of the  Corporation,
prior  to the  shares  of  Common  Stock  and any  other  class  of stock of the
Corporation ranking junior to the 8% Preferred Stock, Series A as to rights upon
liquidation,  dissolution or winding up of the Corporation, so that in the event
of any  liquidation,  dissolution  or  winding  up of the  Corporation,  whether
voluntary or involuntary,  the holders of the 8% Preferred Stock, Series A shall
be  entitled  to receive  out of the  assets of the  Corporation  available  for
distribution  to its  stockholders,  whether from capital,  surplus or earnings,
before any  distribution  is made to  holders  of shares of Common  Stock or any
other such junior stock, an amount equal to $145.00 per share (the  "Liquidation
Preference" of a share of 8% Preferred Stock,  Series A) plus an amount equal to
all dividends  (whether or not earned or declared)  accrued and  accumulated and
unpaid  on the  shares  of 8%  Preferred  Stock,  Series  A to the date of final
distribution.  The  holders  of the 8%  Preferred  Stock,  Series  A will not be
entitled to receive the Liquidation  Preference until the liquidation preference
of any  other  class  of  stock  of the  Corporation  ranking  senior  to the 8%
Preferred Stock, Series A as to rights upon liquidation,  dissolution or winding
up shall have been paid (or a sum set aside  therefor  sufficient to provide for
payment) in full. After payment of the full amount of the Liquidation Preference
and such dividends,  the holders of shares of 8% Preferred Stock,  Series A will
not be entitled to any further  participation  in any  distribution of assets by
the  Corporation.  If, upon any  liquidation,  dissolution  or winding up of the
Corporation,  the assets of the Corporation, or proceeds thereof,  distributable
among the holders of shares of Parity  Preferred  Stock shall be insufficient to
pay in full the preferential amount aforesaid, then such assets, or the proceeds
thereof,  shall be  distributable  among such holders ratably in accordance with
the  respective  amounts  which  would be payable on such  shares if all amounts
payable  thereon  were  paid  in  full.  For  the  purposes  hereof,  neither  a
consolidation or merger of the Corporation with or into another corporation, nor
a merger of any other  corporation with or into the  Corporation,  nor a sale or
transfer of all or any part of the  Corporation's  assets for cash or securities
shall be considered a liquidation, dissolution or winding up of the Corporation.

     IV. Conversion.

          I. The holders of shares of 8%  Preferred  Stock,  Series A shall have
the right, at their option,  to convert shares of 8% Preferred  Stock,  Series A
into shares of Common Stock at any time, on and subject to the  following  terms
and conditions:

               A.  The  shares  of  8%  Preferred  Stock,   Series  A  shall  be
          convertible  at the office of any transfer  agent for the 8% Preferred
          Stock,  Series A, and at such other office or offices,  if any, as the
          Board of Directors may  designate,  into fully paid and  nonassessable
          shares  (calculated as to each  conversion to the nearest 1/100th of a
          share)  of  Common  Stock,  at the  conversion  price,  determined  as
          hereinafter provided, in effect at the time of conversion,  each share
          of 8% Preferred Stock, Series A being



384442.1


                                       -3-

<PAGE>



          taken at  $145.00  for the  purpose of such  conversion.  The price at
          which shares of Common Stock shall be delivered upon  conversion  (the
          "conversion  price")  shall be  initially  $14.50  per share of Common
          Stock. The conversion price shall be adjusted as provided in paragraph
          (d) below.  

               B. In order to convert shares of the 8% Preferred Stock, Series A
          into Common Stock,  the holder  thereof shall  surrender at any office
          hereinabove mentioned the certificate or certificates  therefor,  duly
          endorsed to the  Corporation  or in blank,  and give written notice to
          the Corporation at said office that such holder elects to convert such
          shares.  No payment or adjustment shall be made upon any conversion on
          account of any dividends  accrued on the shares of 8% Preferred Stock,
          Series A surrendered  for conversion or on account of any dividends on
          the  Common  Stock  issued  upon  such  conversion.  Shares  of the 8%
          Preferred  Stock,  Series A shall be  deemed  to have  been  converted
          immediately  prior to the close of business on the day of surrender of
          such shares for conversion in accordance with the foregoing provisions
          (the "conversion date"), and the person or persons entitled to receive
          the Common Stock  issuable upon such  conversion  shall be treated for
          all  purposes as the record  holder or holders of such Common Stock at
          such time. As promptly as practicable on or after the conversion date,
          the  Corporation  shall  issue  and  shall  deliver  at said  office a
          certificate  or  certificates  for the number of full shares of Common
          Stock issuable upon such  conversion,  together with a cash payment in
          lieu of any  fraction  of a share,  as  hereinafter  provided,  to the
          person or persons entitled to receive the same.

                  (c) No fractional  shares of Common Stock shall be issued upon
         conversion of shares of 8% Preferred  Stock,  Series A, but, in lieu of
         any  fraction  of a share of Common  Stock  which  would  otherwise  be
         issuable in respect of the  aggregate  number of shares of 8% Preferred
         Stock,  Series A  surrendered  for  conversion  at one time by the same
         holder,  the  Corporation  shall pay in cash as an  adjustment  of such
         fraction an amount equal to the same  fraction of the Closing Price (as
         defined  below) on the date on which  such  shares of the 8%  Preferred
         Stock, Series A were duly surrendered for conversion,  or, if such date
         is not a Trading Date (as defined below), on the next Trading Date.

               (d) The  conversion  price shall be adjusted from time to time as
          follows:

                    1. In case the Corporation  shall a. pay a dividend (or make
               a  distribution)  on its  outstanding  shares of Common  Stock in
               Common Stock,  b.  subdivide or split its  outstanding  shares of
               Common Stock into a larger  number of shares by  reclassification
               or otherwise,  c. combine its outstanding  shares of Common Stock
               into a smaller number of shares by reclassification or otherwise,
               or d. issue any shares of Common Stock by reclassification, the



384442.1


                                       -4-

<PAGE>



               conversion  price in  effect at the time of the  record  date for
               such dividend or  distribution  or other  effective  date of such
               subdivision, combination or reclassification shall be adjusted so
               that the holder of any  shares of 8%  Preferred  Stock,  Series A
               surrendered  for conversion  after such time shall be entitled to
               receive the number of shares of Common  Stock which he would have
               owned or been  entitled  to  receive  had such  shares  of the 8%
               Preferred  Stock,  Series A been converted  immediately  prior to
               such time.

                    2. In case the Corporation shall issue rights or warrants to
               all holders of its Common Stock  entitling  them to subscribe for
               or purchase shares of Common Stock at a price per share less than
               the current  market  price per share  (determined  as provided in
               clause (4) below) on the record date for the distribution of such
               rights or warrants, the conversion price in effect at the opening
               of  business  on such  record  date shall be adjusted so that the
               same  shall  equal  the  price   determined  by  multiplying  the
               conversion  price  then in  effect  by a  fraction,  of which the
               numerator  shall be the  number of shares  of Common  Stock  then
               outstanding  plus the number of shares of Common  Stock which the
               aggregate  exercise  price of such  warrants or rights  exercised
               would  purchase  at such  current  market  price and of which the
               denominator  shall be the  number of shares of Common  Stock then
               outstanding plus the number of additional  shares of Common Stock
               issued  upon  the  exercise  of such  warrants  or  rights.  Such
               adjustment  shall become  effective at the opening of business on
               the business day next following the computation  thereof.  If the
               conversion price shall be adjusted at any time under or by reason
               of provisions  in this clause (2),  then, in case of the delivery
               of Common  Stock upon the  exercise  of any such right or warrant
               the conversion  price then in effect hereunder shall forthwith be
               adjusted to such  respective  amount as would have been  obtained
               had such right or warrant  never  been  issued as to such  Common
               Stock and had  adjustments  been made  upon the  issuance  of the
               shares of Common Stock delivered as aforesaid.

                    3. In case the Corporation  shall  distribute to all holders
               of its  Common  Stock  evidences  of its  indebtedness  or assets
               (excluding  any  cash or stock  dividends  or  distributions  and
               dividends  referred to in clause (1) above) or rights or warrants
               to subscribe for or purchase securities of the Corporation or any
               of its  subsidiaries  (other than shares of Common Stock referred
               to in clause (2)  above),  then in each such case the  conversion
               price  shall be  adjusted  so that the same shall equal the price
               determined  by  multiplying   the  conversion   price  in  effect
               immediately  prior to the date of such distribution by a fraction
               of which the  numerator  shall be the  current  market  price per
               share  (determined as provided in clause (4) below) of the Common
               Stock on the  record  date  mentioned  below  less the then  fair
               market value (as determined by the Board



384442.1


                                       -5-

<PAGE>



               of Directors,  whose  determination  shall be  conclusive) of the
               portion of the assets or evidences of  indebtedness  or rights or
               warrants so distributed  applicable to one share of Common Stock,
               and the denominator  shall be such current market price per share
               of the Common Stock.  Such adjustment  shall become  effective on
               the opening of business on the  business day next  following  the
               record date for the  determination  of  stockholders  entitled to
               receive such distribution.

                    4. For the purpose of any computation under clause (1), (2),
               or (3) above,  the current market price per share of Common Stock
               on any date  shall  be  deemed  to be the  average  of the  daily
               Closing  Prices for the 30 consecutive  Trading Dates  commencing
               not more than 45 Trading  Dates before the day in question,  such
               30  consecutive  Trading Date period to be specified by the Board
               of Directors prior to the commencement of 45 Trading Dates before
               the day in question, or in the event the Board of Directors fails
               to specify such 30 consecutive Trading Dates, such 30 consecutive
               Trading  Dates  shall be  deemed  to have  commenced  on the 40th
               Trading Date before the day in question.

                    5. No adjustment in the  conversion  price  pursuant to this
               paragraph 4 shall be  required  unless a. such  adjustment  would
               require an  increase  or  decrease  of at least 1% in such price;
               provided that any  adjustment  which by reason of this  paragraph
               (d)(5) is not  required  to be made shall be carried  forward and
               taken into account in any subsequent  adjustment and will be made
               not more than three  years after the time it would have been made
               but for the provisions of this paragraph (d)(5); provided further
               that,  at the  time  of any  adjustment,  such  adjustment  shall
               include all  adjustments  to the date thereof then being  carried
               forward. All calculations under this paragraph 4 shall be made to
               the  nearest  1/100th  of a cent or to the  nearest  1/100th of a
               share, as the case may be.

                         (e) In  case  of any  consolidation  or  merger  of the
                    Corporation with or into another  corporation or in the case
                    of any sale or conveyance to another corporation (other than
                    a  wholly-owned  subsidiary  of the  Corporation)  of all or
                    substantially   all  of  the  property  and  assets  of  the
                    Corporation,  the  holder  of a  share  of the 8%  Preferred
                    Stock,  Series A shall have the right  thereafter to convert
                    such  share  into the kind and amount of shares of stock and
                    other   securities  and  properties   receivable  upon  such
                    consolidation, merger, sale or conveyance by a holder of the
                    number of shares of Common Stock into which such share of 8%
                    Preferred   Stock,   Series  A  might  have  been  converted
                    immediately  prior to such  consolidation,  merger,  sale or
                    conveyance  and shall have no other  conversion  rights with
                    regard to such share of 8% Preferred Stock, Series A. In the
                    event of such a consolidation,  merger,  sale or conveyance,
                    effective  provision  shall  be made in the  certificate  of
                    incorporation of the resulting or



384442.1


                                       -6-

<PAGE>



                    surviving corporation or otherwise for the protection of the
                    conversion  rights of the shares of the 8% Preferred  Stock,
                    Series A which shall be applicable,  as nearly as reasonably
                    may  be,  to any  such  other  shares  of  stock  and  other
                    securities  and  property  deliverable  upon  conversion  of
                    shares  of  the  8%  Preferred  Stock,  Series  A.  In  case
                    securities  or  properties  other than Common Stock shall be
                    issuable or deliverable  upon conversion as aforesaid,  then
                    all references in this paragraph 4 shall be deemed to apply,
                    so far as appropriate and as nearly as may be, to such other
                    securities or properties.

                         (f) Whenever the conversion price is adjusted as herein
                    provided:

                              (1) the  Corporation  shall  compute the  adjusted
                         conversion  price in accordance  with this  paragraph 4
                         and shall prepare a certificate signed by the President
                         or one of the Vice  Presidents and the Treasurer or one
                         of the Assistant  Treasurers of the Corporation setting
                         forth  the   adjusted   conversion   price,   and  such
                         certificate  shall forthwith be filed with the transfer
                         agent or agents for the 8% Preferred  Stock,  Series A;
                         and

                              (2) a notice stating that the conversion price has
                         been adjusted and setting forth the adjusted conversion
                         price shall, as soon as  practicable,  be mailed to the
                         holders  of  record  of the  outstanding  shares  of 8%
                         Preferred Stock, Series A.

                         (g) In case at any time:

                              (1) the  Corporation  shall declare a dividend (or
                         any other  distribution)  on its Common  Stock  payable
                         otherwise than in cash out of profits or surplus; or

                              (2) the  Corporation  shall authorize the granting
                         to the  holders  of  its  Common  Stock  of  rights  to
                         subscribe  for or purchase any shares of capital  stock
                         of any class or series or of any other rights; or

                              (3) of any  reclassification  of the capital stock
                         of  the  Corporation   (other  than  a  subdivision  or
                         combination of its outstanding shares of Common Stock),
                         or  of  any   consolidation  or  merger  to  which  the
                         Corporation  is a party and for which  approval  of any
                         stockholders of the Corporation is required,  or of the
                         sale or  transfer  of all or  substantially  all of the
                         property  and  assets  of  the  Corporation,  or of the
                         voluntary or  involuntary  dissolution,  liquidation or
                         winding up of the Corporation;




384442.1


                                       -7-

<PAGE>



                         then the  Corporation  shall  cause to be mailed to the
                         transfer  agent or agents for the 8%  Preferred  Stock,
                         Series  A  and  to  the   holders   of  record  of  the
                         outstanding shares of 8% Preferred Stock,  Series A, at
                         least  20 days  (or 10 days in any  case  specified  in
                         clause (1) or (2) above) prior to the applicable record
                         date  hereinafter  specified,  a notice stating (x) the
                         date on which a record is to be taken  for the  purpose
                         of such  dividend,  distribution  or  rights,  or, if a
                         record  is not to be  taken,  the date as of which  the
                         holders  of Common  Stock of record to be  entitled  to
                         such  dividend,   distribution  or  rights  are  to  be
                         determined,   or   (y)   the   date   on   which   such
                         reclassification,    consolidation,    merger,    sale,
                         transfer,  dissolution,  liquidation  or  winding up is
                         expected to become effective,  and the date as of which
                         it is expected  that  holders of Common Stock of record
                         shall be entitled to  exchange  their  shares of Common
                         Stock for securities or other property deliverable upon
                         such  reclassification,  consolidation,  merger,  sale,
                         transfer, dissolution, liquidation or winding up.

                    (h) The  Corporation  shall at all  times  reserve  and keep
               available, free from preemptive rights, out of its authorized but
               unissued   Common  Stock,   for  the  purpose  of  effecting  the
               conversion of the shares of the 8% Preferred Stock, Series A, the
               full number of shares of Common Stock then  deliverable  upon the
               conversion  of all shares of 8%  Preferred  Stock,  Series A then
               outstanding.

                    (i) The Corporation will pay any and all transfer taxes that
               may be payable in respect of the  issuance  or delivery of shares
               of Common Stock on  conversion  of shares of 8% Preferred  Stock,
               Series A pursuant hereto. The Corporation shall not, however,  be
               required  to pay any tax which may be  payable  in respect of any
               transfer  involved in the issue and  delivery of shares of Common
               Stock  in a name  other  than  that in  which  the  shares  of 8%
               Preferred Stock,  Series A so converted were  registered,  and no
               such issue or delivery  shall be made unless and until the person
               requesting  such issue has paid to the  Corporation the amount of
               any such tax,  or has  established,  to the  satisfaction  of the
               Corporation, that such tax has been paid.

                    (j) For the purpose of this  paragraph  4, the term  "Common
               Stock"  shall  include any stock of any class of the  Corporation
               which has no  preference  in respect of  dividends  or of amounts
               payable in the event of any voluntary or involuntary liquidation,
               dissolution  or winding up of the  Corporation,  and which is not
               subject  to  redemption  by  the  Corporation.   However,  shares
               issuable  on  conversion  of  shares of the 8%  Preferred  Stock,
               Series A shall include only shares of Common Stock as such Common
               Stock  exists  on the date of this  Certificate  or shares of any
               class  or  classes   resulting  from  any   reclassification   or
               reclassifications thereof and which have no preference in respect
               of dividends or of amounts  payable in the event of any voluntary
               or  involuntary  liquidation,  dissolution  or  winding up of the
               Corporation  and  which  are not  subject  to  redemption  by the
               Corporation,  provided  that if at any time  there  shall be more
               than one such resulting class, the shares of each such class then
               so issuable



384442.1


                                       -8-

<PAGE>



               shall be  substantially  in the proportion which the total number
               of shares of such class resulting from all such reclassifications
               bears to the total number of shares of all such classes resulting
               from all such reclassifications.

                    (k) As used in this paragraph 4, the term "Closing Price" on
               any day shall mean the reported  last sales price on such day or,
               in case no such sale takes place on such day,  the average of the
               reported  closing bid and asked  prices,  in each case on the New
               York Stock  Exchange,  or, if the  Common  Stock is not listed or
               admitted  to trading on such  Exchange,  on the  Frankfurt  Stock
               Exchange,  or, if the Common  Stock is not listed or  admitted to
               trading on such Exchange, on the principal securities exchange on
               which the Common  Stock is listed or admitted to trading on which
               prices are quoted in U.S. dollars,  or, if not listed or admitted
               to trading on any such  securities  exchange,  the average of the
               closing bid and asked prices as furnished in U.S.  dollars by any
               broker/dealer  selected  from  time  to  time  by  the  Board  of
               Directors  for that purpose;  and the term  "Trading  Date" shall
               mean a date on which the New York Stock  Exchange,  the Frankfurt
               Stock  Exchange or other  applicable  securities  market used for
               determining  the  Closing  Price is open for the  transaction  of
               business.  To the  extent  required,  a  Closing  Price  shall be
               converted  to U.S.  dollars  from  deutsche  marks or to deutsche
               marks from U. S. dollars at the noon buying rate in New York City
               for cable  transfers  in  foreign  currencies  as  certified  for
               customs  purposes by the Federal Reserve Bank of New York for the
               date in question.

          II. The Corporation  shall have the right,  at its option,  to convert
all shares of 8%  Preferred  Stock,  Series A then  outstanding  into  shares of
Common Stock upon the  consummation  (the  "Qualified  Public  Offering  Closing
Date") of a "Qualified Public Offering" (as defined in paragraph 5(e) below), on
and subject to the same terms and  conditions as apply to  conversions of the 8%
Preferred  Stock,  Series A at the option of the  holders  thereof  pursuant  to
subparagraph I of this paragraph 4, except that the following  provisions  shall
be applicable to a conversion by the Corporation  pursuant to this  subparagraph
II:

                    (a)  Such  conversion  shall be at the  conversion  price in
               effect  immediately  prior  to  the  close  of  business  on  the
               Qualified Public Offering Closing Date.

                    (b) Unless the  Corporation  gives notice to the contrary to
               the transfer agent or agents for the 8% Preferred Stock, Series A
               at  least  three  business  days  prior to the  Qualified  Public
               Offering  Closing  Date,  it will be  deemed to have  elected  to
               convert all outstanding  shares of 8% Preferred  Stock,  Series A
               immediately  prior to the  close  of  business  on the  Qualified
               Public Offering Closing Date.

                    (c) Whenever the 8% Preferred  Stock,  Series A is converted
               pursuant to this  subparagraph II, a notice to that effect shall,
               as soon as practicable, be mailed to



384442.1


                                       -9-

<PAGE>



               the holders of record of the  outstanding  shares of 8% Preferred
               Stock,   Series  A.  In  order  to  receive  a   certificate   or
               certificates  for the Common Stock issuable upon such  conversion
               and any cash  payment  in lieu of any  fraction  of a share,  the
               holders of 8% Preferred  Stock,  Series A shall  surrender at the
               office of any transfer agent for the 8% Preferred  Stock,  Series
               A, or at such other  office or  offices,  if any, as the Board of
               Directors may designate,  the certificate or certificates for the
               8% Preferred Stock, Series A, duly endorsed to the Corporation or
               in  blank.  No  payment  or  adjustment  shall  be made  upon any
               conversion pursuant hereto on account of any dividends accrued on
               the  shares of 8%  Preferred  Stock,  Series A  converted  by the
               Corporation  or on account of any  dividends  on the Common Stock
               issued upon such conversion.

                    (d) Except as superseded by the foregoing, the provisions of
               subparagraph  I of  this  paragraph  4  shall  apply,  so  far as
               appropriate and as nearly as may be, to this subparagraph II.

          Notwithstanding  the  foregoing,  in no event  shall the 8%  Preferred
Stock,  Series A be converted  pursuant to this  subparagraph  II of paragraph 4
unless  all  shares  of  8%  Cumulative   Convertible  Preferred  Stock  of  the
Corporation  then  outstanding are also converted by the Corporation into Common
Stock at the same time.

          V. Voting Rights. The holders of shares of 8% Preferred Stock,  Series
A shall have no voting rights whatsoever,  except for any voting rights to which
they may be  entitled  under  the laws of the  State of  Nevada,  and  except as
follows:

               A. In the event that, at any time or times,  dividends payable on
          the shares of 8% Preferred Stock, Series A shall be in arrears for two
          consecutive  calendar quarters or more, the holders of the outstanding
          shares of 8% Preferred  Stock,  Series A shall have the right  (voting
          together as a class) to elect one member of the Board of  Directors at
          such time or times and thereafter until such rights shall terminate in
          accordance  with the  provisions of this  paragraph 5 or in accordance
          with applicable laws. Such director shall be an additional director of
          the then existing Board of Directors.

               B. Any right to elect a director which arises  because  dividends
          payable on the  shares of 8%  Preferred  Stock,  Series A have been in
          arrears for two consecutive  calendar  quarters or more shall continue
          until  such  arrearages  have been paid or set apart for  payment,  at
          which  time such  right  shall  terminate,  except as herein or by law
          expressly  provided,  subject  to  revesting  in the event of each and
          every subsequent default of the character above mentioned.

               C. The term of office of any director  then in office  elected by
          the  holders  of  shares  of 8%  Preferred  Stock,  Series  A  because
          dividends payable on the shares of



384442.1


                                      -10-

<PAGE>



          8% Preferred Stock,  Series A have been in arrears for two consecutive
          calendar  quarters or more shall  terminate  18 months  following  any
          termination  of the right of the  holders  of  shares of 8%  Preferred
          Stock,  Series A as a class to vote for directors as herein  provided.
          Whenever the term of office of any director  elected by the holders of
          shares of the 8% Preferred Stock, Series A who are entitled to vote in
          such manner shall end, the number of the directors of the  Corporation
          shall be reduced  correspondingly.  Any  director  who shall have been
          elected  pursuant  to this  paragraph  5 may be  removed  at any time,
          either with or without cause by the holders of the outstanding  shares
          of 8% Preferred  Stock,  Series A, voting  separately as a class.  Any
          vacancy thereby created may be filled only by the affirmative  vote of
          the  holders  of  shares  of  8%  Preferred  Stock,  Series  A  voting
          separately  as a class.  If the office of any director  elected by the
          holders of shares of 8%  Preferred  Stock,  Series A voting as a class
          becomes  vacant for any reason  other than the removal  from office as
          aforesaid,  any remaining  director or directors  elected  pursuant to
          this  paragraph  may choose a successor  who shall hold office for the
          unexpired term in respect of which such vacancy occurred. At elections
          for such  directors,  each  holder of shares  of 8%  Preferred  Stock,
          Series A shall be entitled to one vote for each share held.

               D. Prior to the completion of a Qualified  Public  Offering,  the
          consent  of the  holders  of at least a  majority  of the shares of 8%
          Preferred Stock,  Series A outstanding at the time (voting as a class)
          given in person  or by proxy,  either  in  writing  or at any  meeting
          called  for the  purpose,  shall be  necessary  to  permit,  effect or
          validate any one or more of the following:

                    a. the amendment,  alteration or repeal,  whether by merger,
               consolidation  or  otherwise,  of any of  the  provisions  of the
               Restated Articles of Incorporation  (including this resolution or
               any provision  hereof) that would materially and adversely affect
               any  power,  preference  or  special  right of the  shares  of 8%
               Preferred  Stock,  Series A or of the holders  thereof;  provided
               that the creation and issuance of other series of Common Stock or
               Preferred  Stock, in each case ranking junior to the shares of 8%
               Preferred  Stock,  Series  A  with  respect  to  the  payment  of
               dividends  and  the  distribution  of  assets  upon  liquidation,
               dissolution  or winding up, shall not be deemed to materially and
               adversely affect such powers, preferences or special rights;

                    b. the amendment,  alteration or repeal,  whether by merger,
               consolidation  or  otherwise,  of any of  the  provisions  of the
               Restated  Articles of  Incorporation or Bylaws of the Corporation
               which would have the effect of  increasing  the size of the Board
               of Directors  of the  Corporation  to greater than nine  members,
               provided that the Board of Directors may be increased in order to
               allow one or more  directors  elected by holders of 8%  Preferred
               Stock, Series A to be seated;



384442.1


                                      -11-

<PAGE>




                    c. the amendment,  alteration or repeal,  whether by merger,
               consolidation  or  otherwise,  of any of  the  provisions  of the
               Restated Articles of Incorporation  (including this resolution or
               any  provision   hereof)  that  would   increase  the  amount  of
               authorized Common Stock or authorized Preferred Stock;

                    d. the creation of any other class or series of stock of the
               Corporation ranking prior to or on a parity with the 8% Preferred
               Stock,  Series A (as those terms are defined in  paragraph  12(a)
               hereof); or

                    e. the  repurchase or other  acquisition of shares of Common
               Stock or  Preferred  Stock,  other than  pursuant to paragraph 8,
               paragraph 9 or paragraph  10 hereof or in the ordinary  course of
               business.

                         (e) As used herein,  the term "Public  Offering"  shall
                    mean  an  underwritten   public  offering  of  Common  Stock
                    pursuant to an effective  registration  statement  under the
                    1933  Act and  listed  on the New  York  Stock  Exchange.  A
                    "Qualified  Public  Offering"  shall mean: a Public Offering
                    prior to  January  1,  2000 in which (i) the  aggregate  net
                    proceeds to the  Corporation  (after payment of all fees and
                    expenses of the offering)  together with the net proceeds of
                    any prior Public Offerings of Common Stock listed on the New
                    York Stock  Exchange  equal or exceed the Minimum Amount (as
                    defined  below)  and  (ii)  (a) if the  Public  Offering  is
                    completed in calendar year 1997, the initial public offering
                    price  is at  least  $16.00  per  share,  (b) if the  Public
                    Offering is  completed  in calendar  year 1998,  the initial
                    public offering price is at least $16.50 per share or (c) if
                    the Public  Offering is completed in calendar year 1999, the
                    initial public  offering price is at least $17.00 per share;
                    provided, however, that a Qualified Public Offering shall be
                    deemed to occur on the first  business day which follows any
                    period of 20 trading days after a Public  Offering and prior
                    to  January  1, 2000,  in which the  average of the  closing
                    prices for shares of the Common Stock as reported on the New
                    York Stock  Exchange  composite  tape  equals or exceeds the
                    applicable  minimum  price  for  a  Public  Offering  to  be
                    considered  a  Qualified   Public  Offering  at  such  time.
                    "Minimum Amount" shall mean, at any time, the sum of (i) $75
                    million  plus (ii) the  product of .5618  multiplied  by the
                    stated  value of all  shares  of 8%  Cumulative  Convertible
                    Preferred Stock issued by the Corporation prior to such time
                    and after November 1, 1996.

                         (f) The foregoing voting provisions shall not apply if,
                    at or prior to the time when the act with  respect  to which
                    such vote would otherwise be required shall be effected, all
                    outstanding  shares of 8%  Preferred  Stock,  Series A shall
                    have been redeemed or called for  redemption  and sufficient
                    funds  shall  have been  deposited  in trust to effect  such
                    redemption.




384442.1


                                      -12-

<PAGE>



               VI. Authorization and Issuance of Other Securities. No consent of
the holders of the 8%  Preferred  Stock,  Series A shall be required for (a) the
creation of any indebtedness of any kind of the  Corporation,  (b) the creation,
or increase  or  decrease in the amount,  of any class or series of stock of the
Corporation  ranking junior as to dividends or upon liquidation,  dissolution or
winding up to the 8% Preferred Stock, Series A or (c) any increase,  decrease or
change in the par value of the Common Stock or in any other terms thereof.

               VII.  Redemption at the Option of the Corporation.  The shares of
8% Preferred  Stock,  Series A which have not  previously  been converted may be
redeemed  by the  Corporation  as a whole in cash at the  Redemption  Price  (as
defined below), at any time on or after December 31, 2001, on the date fixed for
redemption (the  "Redemption  Date").  The "Redemption  Price" shall be $145 per
share,  plus a sum equal to all  dividends  accrued  and  unpaid  thereon to the
Redemption Date, plus a redemption premium (the "Redemption Premium") calculated
to cause the holders of the 8%  Preferred  Stock,  Series A to have  received an
internal rate of return of 12%. The method of calculating the Redemption Premium
is set forth in Exhibit A hereto.

               VIII.  Procedure for Redemption.  The  Corporation  shall cause a
notice (the "Redemption  Notice") to be mailed,  first-class postage prepaid, at
least 30 days, but not more than 90 days,  prior to the Redemption Date, to each
holder of record of shares of 8% Preferred Stock, Series A to be redeemed.  Such
Redemption  Notice  shall be mailed to such record  holders at their  respective
addresses as they appear upon the books of the  Corporation  and shall set forth
the Redemption  Date, the Redemption Price and the place or places for surrender
of certificates for shares to be redeemed.

               Any  Redemption  Notice  which is  mailed by the  Corporation  as
provided in this  paragraph 8 shall be  conclusively  presumed to have been duly
given,  whether or not the  stockholder  receives such  Redemption  Notice,  and
failure  to give such  notice by mail,  or any  defect  in such  notice,  to the
holders  of any  shares of 8%  Preferred  Stock,  Series A shall not  affect the
validity of the proceedings for the redemption of any other shares.  On or after
the Redemption  Date  specified in such  Redemption  Notice,  each holder of the
shares called for redemption  shall  surrender the  certificate  evidencing such
shares to the  Corporation  at the place  designated  in such  notice  and shall
thereupon be entitled to receive the  Redemption  Price.  If, on the  Redemption
Date, funds necessary for the redemption  shall be available  therefor and shall
have been irrevocably  deposited or set aside,  then,  notwithstanding  that the
certificates  evidencing such shares of 8% Preferred  Stock,  Series A shall not
have been surrendered,  the dividends with respect to the shares of 8% Preferred
Stock,  Series A shall cease to accrue  after the  Redemption  Date,  the shares
shall no longer be deemed to be outstanding,  the holders thereof shall cease to
be stockholders of the  Corporation,  and all rights with respect to such shares
shall forthwith  terminate  (except the right to receive the amount payable upon
redemption of the shares to be redeemed, without interest).



384442.1


                                      -13-

<PAGE>




               IX.  Redemption  at  the  Option  of  the  Holder.   (a)  If  the
Corporation  has not completed,  prior to January 1, 2001, a Public  Offering in
which the aggregate net proceeds to the  Corporation  (after payment of all fees
and expenses of the offering) equal or exceed $75,000,000, each holder of shares
of 8% Preferred  Stock,  Series A shall have the right to require  redemption of
its shares of 8% Preferred Stock,  Series A by the Corporation in cash, pursuant
to the offer  described  below (the "Put Offer") at a price equal to 100% of the
stated  value per share  plus a sum equal to all  dividends  accrued  and unpaid
thereon (if any) to the related Put Date defined below (the "Put Payment").  The
right to require redemption of the 8% Preferred Stock, Series A pursuant to this
paragraph 9 shall arise on January 1, 2001 or on the first day thereafter  which
is the first day of a month and on which  there are no  accumulated  and  unpaid
dividends on the 7% Cumulative Convertible Preferred Stock of the Corporation or
on any other class or series of preferred stock of the Corporation ranking prior
to  or  on a  parity  with  the  8%  Preferred  Stock,  Series  A  (the  "Option
Commencement  Date"). The right to require redemption of the 8% Preferred Stock,
Series A shall  extend  from the Option  Commencement  Date to the date which is
three calendar months thereafter (the "Option Period").

                    (b) Within 10 days of the commencement of the Option Period,
               the  Corporation  shall mail a notice (the "Put  Notice") to each
               holder of record of the 8% Preferred Stock, Series A stating:

                         (i) that the Option Period has commenced,  that the Put
                    Offer  is  being  made  pursuant  to  the  terms  of  the 8%
                    Preferred  Stock,  Series  A  and  that  all  shares  of  8%
                    Preferred Stock,  Series A validly tendered will be accepted
                    for  redemption,  provided,  that the holders of such shares
                    provide  notice to the  Corporation  on or prior to the last
                    day of the Option Period of their intention to redeem and of
                    the number shares to be redeemed;

                         (ii) the  redemption  price and the date of  redemption
                    (which, subject to the provisions of subparagraph (e) below,
                    shall be a  business  day no  earlier  than 30 days from the
                    date  such  notice  is  mailed  and no later  than the first
                    anniversary  of the  Option  Commencement  Date)  (the  "Put
                    Date");

                         (iii) that any shares of 8% Preferred  Stock,  Series A
                    not tendered will continue to accumulate dividends;

                         (iv)  that,  unless  the  Corporation  defaults  in the
                    payment  of the Put  Payment,  any  shares  of 8%  Preferred
                    Stock,  Series A accepted for redemption pursuant to the Put
                    Offer  shall  cease to  accumulate  dividends  after the Put
                    Date;

                         (v)  that  holders  of 8%  Preferred  Stock,  Series  A
                    electing to have any shares of 8% Preferred Stock,  Series A
                    redeemed pursuant to the Put Offer will be



384442.1


                                      -14-

<PAGE>



                    required to surrender  the  certificates  representing  such
                    shares of 8% Preferred Stock, Series A to the transfer agent
                    for  the  8%  Preferred  Stock,  Series  A  at  the  address
                    specified  in the notice  prior to 1:00 P.M.,  New York City
                    time,  on the business  day  immediately  preceding  the Put
                    Date; and

                         (vi) that holders  whose shares of 8% Preferred  Stock,
                    Series A are being  redeemed only in part will be issued new
                    certificates  representing  shares  of 8%  Preferred  Stock,
                    Series A equal in number to the  unredeemed  portion  of the
                    shares of 8% Preferred Stock, Series A surrendered; provided
                    that each  certificate  representing  shares of 8% Preferred
                    Stock,   Series  A   redeemed   and  each  new   certificate
                    representing  shares of 8% Preferred Stock,  Series A issued
                    shall be in whole shares.

                    (c) On or before the Put Date:

                         (i) the  transfer  agent  for the 8%  Preferred  Stock,
                    Series A shall  deliver  to the  Corporation  a  certificate
                    specifying  the  aggregate  number of shares of 8% Preferred
                    Stock,  Series A delivered for purchase by the holders of 8%
                    Preferred  Stock,  Series  A prior to the Put  Payment  Date
                    pursuant to the Change in Control Offer;

                         (ii) the Corporation shall accept for redemption shares
                    of 8% Preferred Stock, Series A or portions thereof tendered
                    pursuant to the Put Offer;

                         (iii) the  Corporation  shall deposit with the transfer
                    agent for the 8% Preferred Stock,  Series A money sufficient
                    to pay the  purchase  price of all  shares  of 8%  Preferred
                    Stock, Series A or portions thereof so accepted; and

                         (iv)  the  Corporation  shall  deliver,  or cause to be
                    delivered, to the transfer agent for the 8% Preferred Stock,
                    Series A an officers'  certificate  specifying the shares of
                    8% Preferred  Stock,  Series A or portions  thereof accepted
                    for payment by the Corporation.

                    (d) The transfer agent for the 8% Preferred Stock,  Series A
               shall promptly mail to the holders of 8% Preferred Stock,  Series
               A so accepted  payment in an amount equal to the purchase  price,
               and the transfer agent for the 8% Preferred Stock, Series A shall
               promptly  authenticate  and mail to such  holders of 8% Preferred
               Stock,  Series  A a new  certificate  representing  shares  of 8%
               Preferred  Stock,  Series A equal in  number  to any  unpurchased
               portion  of the  certificate  representing  8%  Preferred  Stock,
               Series A  surrendered;  provided  that each share of 8% Preferred
               Stock,  Series A purchased and each new certificate  representing
               shares of 8% Preferred  Stock,  Series A issued shall be in whole
               shares.  The Corporation  will notify the holders of 8% Preferred
               Stock,  Series A of the results of the Put Offer on or as soon as
               practicable after the Put Payment Date.



384442.1


                                      -15-

<PAGE>




                    (e) In the event the  Corporation  is unable to make the Put
               Payment due to the existence of accumulated and unpaid  dividends
               on any class or series of preferred stock of the Corporation, the
               Put Date  shall be  deemed  to  occur on the  business  day ( the
               "Revised Put Date") which falls 10 business  days  following  the
               first  date  which  is  the  first  day  of a  month,  which  the
               Corporation notifies to the holders of record of the 8% Preferred
               Stock Series A and on which there are no  accumulated  and unpaid
               dividends  on any  class  or  series  of  preferred  stock of the
               Corporation, provided, that there shall be no requirement for any
               holder of shares of 8% Preferred Stock, Series A to tender shares
               for redemption on the Revised Put Date, and all rights of holders
               of 8%  Preferred  Stock,  Series A to redeem  such  shares  shall
               expire if such shares are not tendered for redemption on or prior
               to the Revised Put Date.

               X. Change in  Control.  (a) Upon the  occurrence  of a "Change in
Control",  each holder of 8% Preferred  Stock,  Series A shall have the right to
require the redemption of his 8% Preferred Stock, Series A by the Corporation in
cash,  pursuant to the offer described below (the "Change in Control Offer"), at
a price  equal to 101% of the  stated  value per  share  plus a sum equal to all
dividends  accrued and unpaid  thereon (if any) to the related Change in Control
Redemption Date. A "Change in Control" shall mean (i) a merger, consolidation or
reorganization of the Corporation,  if, after giving effect thereto, the holders
of the Common Stock prior to such transaction  shall fail to own at least 51% of
the  capital  stock  entitled  to vote  for the  election  of  directors  in the
successor  entity,  (ii) the sale of a  majority  or more of the  assets  of the
Corporation in any single transaction or in any series of related  transactions,
or  (iii)  a  change  in  the  composition  of the  Board  of  Directors  of the
Corporation such that during any period of two consecutive years the individuals
who at the  beginning  of such period were  directors of the  Corporation  shall
cease for any reason to  constitute a majority of the  directors  then in office
(and not  designated  to the Board by any holder of Preferred  Stock) unless the
individuals  replacing  such directors were elected or nominated by the Board of
Directors of the Corporation.

                    (b) Within 30 days of any Change in Control, the Corporation
               shall mail a notice  (the  "Change in  Control  Notice")  to each
               holder of record of the 8% Preferred Stock, Series A stating:

                         (i) that a Change in  Control  has  occurred,  that the
                    Change in Control  Offer is being made pursuant to the terms
                    of the 8% Preferred  Stock,  Series A and that all shares of
                    8%  Preferred  Stock,  Series  A  validly  tendered  will be
                    accepted for redemption;

                         (ii) the  redemption  price and the date of  redemption
                    (which  shall be a business  day no earlier than 30 days nor
                    later than 60 days from the date such notice is mailed) (the
                    "Change in Control Redemption Date");




384442.1


                                      -16-

<PAGE>



                         (iii) that any shares of 8% Preferred  Stock,  Series A
                    not tendered will continue to accumulate dividends;

                         (iv)  that,  unless  the  Corporation  defaults  in the
                    payment  of the  Change in  Control  redemption  price,  any
                    shares  of  8%  Preferred  Stock,   Series  A  accepted  for
                    redemption  pursuant  to the Change in Control  Offer  shall
                    cease to  accumulate  dividends  after the Change in Control
                    Redemption Date;

                         (v)  that  holders  of 8%  Preferred  Stock,  Series  A
                    electing to have any shares of 8% Preferred Stock,  Series A
                    redeemed  pursuant  to the Change in  Control  Offer will be
                    required to surrender  the  certificates  representing  such
                    shares of 8% Preferred Stock, Series A to the transfer agent
                    for  the  8%  Preferred  Stock,  Series  A  at  the  address
                    specified  in the notice  prior to 1:00 P.M.,  New York City
                    time, on the business day  immediately  preceding the Change
                    in Control Redemption Date; and

                         (vi) that holders  whose shares of 8% Preferred  Stock,
                    Series A are being purchased only in part will be issued new
                    certificates  representing  shares  of 8%  Preferred  Stock,
                    Series A equal in number to the  unredeemed  portion  of the
                    shares of 8% Preferred Stock, Series A surrendered; provided
                    that each  certificate  representing  shares of 8% Preferred
                    Stock,   Series  A   redeemed   and  each  new   certificate
                    representing  shares of 8% Preferred Stock,  Series A issued
                    shall be in whole shares.

               (c) On or before the Change in Control Redemption Date:

                         (i) the  transfer  agent  for the 8%  Preferred  Stock,
                    Series A shall  deliver  to the  Corporation  a  certificate
                    specifying  the  aggregate  number of shares of 8% Preferred
                    Stock,  Series A delivered for purchase by the holders of 8%
                    Preferred  Stock,  Series A prior to the  Change in  Control
                    Payment Date pursuant to the Change in Control Offer;

                         (ii) the Corporation shall accept for redemption shares
                    of 8% Preferred Stock, Series A or portions thereof tendered
                    pursuant to the Change in Control Offer;


                         (iii) the  Corporation  shall deposit with the transfer
                    agent for the 8% Preferred Stock,  Series A money sufficient
                    to pay the Change in Control  redemption price of all shares
                    of 8%  Preferred  Stock,  Series A or  portions  thereof  so
                    accepted; and

                         (iv)  the  Corporation  shall  deliver,  or cause to be
                    delivered, to the transfer agent for the 8% Preferred Stock,
                    Series A an officers' certificate specifying the



384442.1


                                      -17-

<PAGE>



                    shares of 8% Preferred  Stock,  Series A or portions thereof
                    accepted for payment by the Corporation.

                    (d) The transfer agent for the 8% Preferred Stock,  Series A
               shall promptly mail to the holders of 8% Preferred Stock,  Series
               A so accepted  payment in an amount equal to the purchase  price,
               and the transfer agent for the 8% Preferred Stock, Series A shall
               promptly  authenticate  and mail to such  holders of shares of 8%
               Preferred  Stock,  Series  A a new  certificate  representing  8%
               Preferred  Stock,  Series A equal  in  number  to any  unredeemed
               shares of 8% Preferred Stock, Series A surrendered; provided that
               each share of 8% Preferred Stock, Series A purchased and each new
               certificate  representing  shares of 8% Preferred Stock, Series A
               issued shall be in whole shares.  The Corporation will notify the
               holders of 8%  Preferred  Stock,  Series A of the  results of the
               Change of Control  Offer on or as soon as  practicable  after the
               Change in Control Redemption Date.

               XI. Amendment of Resolution.  The Board of Directors reserves the
right by subsequent  amendment of this  resolution from time to time to increase
or decrease the number of shares that constitute the 8% Preferred Stock,  Series
A (but not below the number of shares  thereof  then  outstanding)  and in other
respects to amend this resolution  within the limitations  provided by law, this
resolution and the Articles of Incorporation.

               XII. Rank. (a) For the purposes of this resolution, any stock of
any class or classes of the Corporation shall be deemed to rank:

                    (i)  prior to shares of the 8%  Preferred  Stock,  Series A,
               either  as to  dividends  or  upon  liquidation,  dissolution  or
               winding  up, or both,  if the  holders  of stock of such class or
               classes  shall be entitled by the terms thereof to the receipt of
               dividends   or  of  amounts   distributable   upon   liquidation,
               dissolution  or winding up, as the case may be, in  preference or
               priority  to the  holders  of shares of the 8%  Preferred  Stock,
               Series A;

                    (ii) on a parity  with  shares  of the 8%  Preferred  Stock,
               Series A, either as to dividends or upon liquidation, dissolution
               or  winding  up, or both,  whether  or not the  dividend  payment
               dates, or redemption or liquidation prices per share thereof,  be
               different from those of the 8% Preferred Stock,  Series A, if the
               holders of stock of such class or classes  shall be  entitled  by
               the terms  thereof  to the  receipt  of  dividends  or of amounts
               distributed upon  liquidation,  dissolution or winding up, as the
               case may be, in proportion to their respective  dividend rates or
               liquidation  prices,  without  preference or priority of one over
               the other as between the holders of such stock and the holders of
               shares  of  8%  Preferred  Stock,  Series  A  (the  term  "Parity
               Preferred  Stock"  being  used to refer to any  stock on a parity
               with the shares of 8%  Preferred  Stock,  Series A,  either as to
               dividends  or upon  liquidation,  dissolution  or winding  up, or
               both, as the context may require); and



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                                      -18-

<PAGE>




                    (iii) junior to shares of the 8% Preferred Stock,  Series A,
               either  as to  dividends  or  upon  liquidation,  dissolution  or
               winding up, or both,  if such class  shall be Common  Stock or if
               the holders of the 8% Preferred Stock, Series A shall be entitled
               to the  receipt of  dividends  or of amounts  distributable  upon
               liquidation,  dissolution  or winding  up, as the case may be, in
               preference  or  priority to the holders of stock of such class or
               classes.

                         (b) the 8% Preferred Stock,  Series A shall rank junior
                    as to dividends and upon liquidation to all shares of the 7%
                    Cumulative  Convertible  Preferred  Stock of the Corporation
                    and to all  shares of 8%  Cumulative  Convertible  Preferred
                    Stock of the Corporation.



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                                      -19-

<PAGE>



          IN WITNESS WHEREOF,  the Corporation has caused this Certificate to be
duly executed in its corporate name on this 7th day of November, 1996.


Sworn to me this                                CORNERSTONE PROPERTIES INC.
___ day of November, 1996
                                                By:  __________________________
______________________                                      Name:
Notary Public                                   Title:
                                                By:  __________________________
Sworn to me this                                           Name:
___ day of November, 1996                       Title:

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




384442.1


                                      -20-

<PAGE>


                                    EXHIBIT A


          Calculation of Internal Rate of Return and Redemption Premium

          For  purposes of paragraph  7, the  Redemption  Premium (if any) shall
equal an amount such that (i) the sum of the accreted  values  (determined as of
such time by using an annual interest rate of 12% compounded  quarterly from the
date on which the related  distribution  was made) of all  distributions  by the
Corporation  to the  holder(s) of 8% Preferred  Stock,  Series A as of such date
(including the Redemption  Premium,  if any) equals (ii) the sum of the accreted
values  (determined  as of such  time by using an  annual  interest  rate of 12%
compounded  quarterly  from the date on which the related  purchase was made) of
all  purchases  of 8%  Preferred  Stock,  Series A made by the  holder(s)  of 8%
Preferred Stock,  Series A. For the purpose of calculating the accreted value of
distributions  or purchases of 8% Preferred  Stock,  Series A made other than on
the first day of a month,  interest shall be calculated on the basis of a 30-day
month and a 360-day  year.  The interest  rate applied on a quarterly  basis for
purposes of calculating the accreted value of  distributions  or purchases of 8%
Preferred Stock, Series A shall be 2.873%.



384442.1


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<PAGE>





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