TRAVEL PORTS OF AMERICA INC
SC 13D, 1999-01-08
AUTO DEALERS & GASOLINE STATIONS
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<PAGE>   1
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC 20549

                                 SCHEDULE 13D
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                              (AMENDMENT NO.    )*
                                            ----

Travel Ports of America, Inc. (Formerly Roadway Plazas, Inc.)
- --------------------------------------------------------------------------------
                               (Name of Issuer)

Common Stock, $0.01 par value
- --------------------------------------------------------------------------------
                        (Title of Class of Securities)

894   167   105   000
- --------------------------------------------------------------------------------
                                (CUSIP Number)

Steven Blechner, 40 Harvestwood Drive, West Bridgewater, MA 02379 (508) 894-4071
- --------------------------------------------------------------------------------
                (Name, Address and Telephone Number of Person
              Authorized to Receive Notices and Communications)

December 28, 1998
- --------------------------------------------------------------------------------
           (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 that is the subject of this Schedule 13D, and is filing this
schedule because of ss.ss.240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ].

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits.  See ss.240.13d-7(b) 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).









POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED 
IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY 
VALID OMB CONTROL NUMBER.
<PAGE>   2


CUSIP NO.  894  167  105  000          
         ----------------------------------------------------------------------

  (1)     NAMES OF REPORTING PERSONS.                 
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).

          Silverstein Investments Limited Partnership
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP          (a)   [   ]
          (SEE INSTRUCTIONS)                                        (b)   [   ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     SOURCE OF FUNDS (SEE INSTRUCTIONS)

          00
          ---------------------------------------------------------------------

  (5)     CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS                        [   ]
          IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

          ---------------------------------------------------------------------

  (6)     CITIZENSHIP OR PLACE OF ORGANIZATION                      

          West Bridgewater, MA, USA
          ---------------------------------------------------------------------

                       (7)     SOLE VOTING POWER                    
  NUMBER OF                    351,238
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (8)     SHARED VOTING POWER                  
  OWNED BY                     
    EACH               --------------------------------------------------------
  REPORTING            (9)     SOLE DISPOSITIVE POWER               
 PERSON WITH                   351,238
                       --------------------------------------------------------
                       (10)    SHARED DISPOSITIVE POWER            
                               
                       --------------------------------------------------------

 (11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     

          ---------------------------------------------------------------------

 (12)     CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES (SEE INSTRUCTIONS)                                       [   ]

          ---------------------------------------------------------------------

 (13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)           
          
          5.4%
          ---------------------------------------------------------------------

 (14)     TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

          PN
          ---------------------------------------------------------------------
                    
Instructions for Cover Page

 (1)      Names and I.R.S. Identification Numbers of Reporting Persons -
          Furnish the full legal name of each person for whom the report is 
          filed - i.e., each person required to sign the schedule itself - 
          including each member of a group. Do not include the name of a person 
          required to be identified in the report but who is not a reporting 
          person. Reporting persons that are entities are also requested to 
          furnish their I.R.S. identification numbers, although disclosure of 
          such numbers is voluntary, not mandatory (see "SPECIAL INSTRUCTIONS 
          FOR COMPLYING WITH SCHEDULE 13D" below).

 (2)      If any of the shares beneficially owned by a reporting person are held
          as a member of a group and the membership is expressly affirmed, 
          please check row 2(a). If the reporting person disclaims membership in
          a group or describes a relationship with other persons but does not 
          affirm the existence of a group, please check row 2(b) [unless it is
          a joint filing pursuant to Rule 13d-1(k)(l) in which case it may not 
          be necessary to check row 2(b)].

 (3)      The 3rd row is for SEC internal use; please leave blank.

                                       2
<PAGE>   3
                                                                              3

CUSIP NO. 894 167 105 000

ITEM 1 - SECURITY AND ISSUER

This relates to the shares of Common Stock, $0.01 par value, of Travel Ports of 
America, Inc. (Formerly Roadway Plazas, Inc.) a New York corporation (the 
"Issuer"). The address of the principal executive office of the Issuer is 3495 
Winton Place, Building C, Rochester, NY 14623.

ITEM 2 - IDENTITY AND BACKGROUND

This statement is filed on behalf of Silverstein Investments Limited Partnership
(the "Partnership"), a limited partnership organized under the laws of the State
of Delaware, whose managing general partner is Steven Blechner ("Blechner"),
whose limited partner is Barry Silverstein ("Silverstein"), whose principal
business is investments and whose address is, 40 Harvestwood Drive, West
Bridgewater, MA 02379. No person listed above has, within the past five years,
been convicted in a criminal proceeding or become subject to a civil judgement
regarding violations of federal or state securities laws. 

ITEM 3 - SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

On December 28, 1998, the Partnership received from Phoenix Associates III, a 
general partnership, as a part of a limited distribution of property to its 
partners, 351,238 shares of the Issuer's Common Stock.

ITEM 4 - PURPOSE OF TRANSACTION

The purpose of the transaction was to distribute various properties held by 
Phoenix Associates III to its partners.

Although the Partnership does not have any specific plan or proposal to 
acquire or dispose of the Issuer's Common Stock, the Partnership at any time 
and from time to time may acquire additional Common Stock or dispose of any or 
all or its Common Stock depending upon ongoing evaluation of the investment in 
the Common Stock, prevailing market conditions, other investment opportunities, 
liquidity requirements of the Partnership and/or other investment 
considerations. 

Except to the extent the foregoing may be deemed a plan or proposal, the 
Partnership does not have any plans or proposals which relate to, or could 
result in, any of the matters referred to in paragraph (a) through (j), 
inclusive, of the instructions to Item 4 of Schedule 13D. The Partnership may, 
at any time and from time to time, review or reconsider its position and/or 
change its purpose and/or formulate plans or proposals with respect thereto. 
<PAGE>   4
                                                                               4

ITEM 5 - INTEREST IN SECURITIES OF THE ISSUER

As of December 28, 1998, the Partnership owns 5.4%, based upon 6,537,267 shares 
of Common Stock outstanding at December 15, 1998, or 351,238 shares of the 
Issuer's Common Stock with sole power to vote or direct the vote of all 351,238 
shares.

ITEM 6 - CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT 
TO SECURITIES OF THE ISSUER

The Partnership has not entered into any contracts, arrangements, 
understandings or relationships with respect to any securities of the Issuer.

ITEM 7 - MATERIAL TO BE FILED AS EXHIBITS

Exhibit A - Silverstein Investments Limited Partnership Agreement
<PAGE>   5
                                                                               5




                                   SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify 
that the information set forth in this statement is true, complete and correct.

Dated: 1/5/99
       ------



                                                      SILVERSTEIN INVESTMENTS
                                                      LIMITED PARTNERSHIP



                                                      By: /s/ Steven Blechner
                                                      --------------------------
                                                      Steven Blechner
                                                      Managing General Partner

<PAGE>   1

                                                                       EXHIBIT A


================================================================================











                          LIMITED PARTNERSHIP AGREEMENT

                                       OF

                  SILVERSTEIN INVESTMENTS LIMITED PARTNERSHIP,
                         A DELAWARE LIMITED PARTNERSHIP









================================================================================



<PAGE>   2



                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                             Page No.
                                                                                                             --------
         <S>      <C>                                                                                        <C>
         ARTICLE I

                                              FORM AND INTERPRETATION...........................................-5-
                  Definitions...................................................................................-5-
                  Captions and Certain Terms....................................................................-9-
                  Severability..................................................................................-9-
                  Limitation of Grant...........................................................................-9-

         ARTICLE II

                                            ORGANIZATION OF PARTNERSHIP.........................................-9-
                  Formation, Name, Office and Registered Agent..................................................-9-
                  Purpose of Partnership.......................................................................-10-
                  Term of Partnership..........................................................................-11-
                  Authorized Acts..............................................................................-11-
                  Co-Ownership of Partnership Interests........................................................-12-
                  Representations and Warranties of the Limited Partners.......................................-12-

         ARTICLE III

                                                PARTNERSHIP CAPITAL............................................-14-
                  Capital Contributions........................................................................-14-
                  Capital Account..............................................................................-15-
                  Expenses Paid by Partners....................................................................-16-
                  Loans by Partners; Restrictions on Borrowing.................................................-16-

         ARTICLE IV

                              PROFITS AND LOSSES AND TAXABLE INCOME AND TAXABLE LOSS...........................-16-
                  Allocations..................................................................................-16-

         ARTICLE V

                                       DISTRIBUTIONS, WITHDRAWALS AND LOANS....................................-18-
                  Distributions................................................................................-18-
                  Limitation on Distributions to Partners......................................................-20-

         ARTICLE VI

                                  AUTHORITY, DUTIES, AND LIABILITIES OF PARTNERS...............................-20-
                  Duties of Managing General Partner...........................................................-20-
                  Managing General Partner's Fees and Expenses.................................................-20-
                  Authority of Managing General Partner........................................................-21-
                  Special Limitation...........................................................................-23-
                  Dealing with Affiliates......................................................................-23-
</TABLE>


<PAGE>   3



<TABLE>
<CAPTION>
                                                                                                             
         <S>      <C>                                                                                        <C>
                  Indemnification of General Partner...........................................................-23-
                  Liability of Limited Partners................................................................-23-
                  Authority of Limited Partners and Non-Managing General Partners..............................-24-

         ARTICLE VII

                                         TRANSFER OF PARTNERSHIP INTERESTS.....................................-24-
                  Limited Partners.............................................................................-24-
                  General Partner..............................................................................-24-
                  Restriction on Transfer......................................................................-24-
                  Admission of Substitute Partner..............................................................-25-
                  Rights of Partner After Assignment and Substitution..........................................-26-
                  Allocations and Distributions After Assignment...............................................-26-

         ARTICLE VIII

                                  RETIREMENT, WITHDRAWAL, OR REMOVAL OF PARTNERS...............................-26-
                  Withdrawal of General Partner or Limited Partner.............................................-26-
                  Retirement, Removal, or Withdrawal of Managing General Partner...............................-27-
                  Retirement of Limited Partner................................................................-28-
                  Rights of Partner After Retirement, Removal, or Withdrawal...................................-28-

         ARTICLE IX

                                                    DISSOLUTION................................................-28-
                  Events of Dissolution........................................................................-28-
                  Winding-Up and Distributions.................................................................-28-
                  Distribution of Liquidation Proceeds and Assets and Allocation of Gains
                       and Losses..............................................................................-29-
                  Limitation of Liability of Partners..........................................................-30-
                  Waiver of Right of Partition of Assets.......................................................-30-

         ARTICLE X

                                   ACCOUNTING YEAR, BOOKS, RECORDS, AND REPORTS................................-30-
                  Books and Records............................................................................-30-
                  Reports......................................................................................-30-
                  Bank Accounts................................................................................-31-
                  Tax Elections................................................................................-31-
                  Accounting Method and Fiscal Year............................................................-31-

         ARTICLE XI

                                                GENERAL PROVISIONS.............................................-31-
                  Power of Attorney............................................................................-31-
                  Partnership Contracts........................................................................-32-
                  Conveyances..................................................................................-32-
                  Notices......................................................................................-32-
</TABLE>


<PAGE>   4



<TABLE>
<CAPTION>
                                                                                                         
                  <S>                                                                                        <C>
                  Consents.....................................................................................-32-
                  Meetings.....................................................................................-33-
                  Binding Effect; Counterparts.................................................................-33-
                  Choice of Law................................................................................-34-
                  Complete Agreement; Modification.............................................................-34-
                  Evidence of Partnership Interests............................................................-34-
                  Tax Matters Partner..........................................................................-34-
                  Gender and Number............................................................................-34-
                  Title........................................................................................-34-
</TABLE>



<PAGE>   5



              SILVERSTEIN INVESTMENTS LIMITED PARTNERSHIP AGREEMENT

         This Limited Partnership Agreement ("Agreement") is entered into,
pursuant to the provisions of the Delaware Uniform Limited Partnership Act, and
shall be retroactively effective as of the date of filing of the Certificate of
Limited Partnership with the Delaware Secretary of State, by Carol Allison, who
was the initial Managing General Partner, Carol Allison has since resigned and
been replaced by Steven Blechner, a resident of Massachusetts whose address is
40 Harvestwood Drive, West, Bridgewater, MA 02379 (as the "Managing General
Partner"). Barry Silverstein, whose address is 5111 Ocean Boulevard, Suite C,
Sarasota, Florida 33581 is the only limited partner in the Partnership. This
Agreement is on the following terms and conditions:


                                    ARTICLE I

                             FORM AND INTERPRETATION

         1. Definitions. The following capitalized terms, as used in this
Agreement and in the attached exhibits, which constitute a part of this
Agreement, have the meanings ascribed to them below and include the plural as
well as the singular number:

         "Act" means the Delaware law pertaining to Limited Partnerships, as
amended, or any subsequent Delaware law concerning partnerships that are enacted
in substitution for the Act.

         "Affiliate" of a Partner means (1) another Partner of the Partnership;
(2) a legal or personal representative of any Partner; (3) the Partner's lineal
descendants and spouse (other than a spouse who is legally separated from the
Partner under a decree of divorce or separate maintenance); (4) a trustee of a
trust for the benefit of any Person referred to in clause (1), (2) or (3); (5) a
Person, other than an individual, of which 80% or more of the voting or equity
interests is owned directly or indirectly by a Partner and/or one or more of the
Persons referred to in clauses (1) through (4); (6) a Person owning 80% or more
of the voting or equity interests of a Partner that is not an individual; or (7)
a Person other than an individual, 80% or more of the voting or equity interests
of which is owned by the same Person that owns 80% or more of the voting or
equity interests of a Partner that is not an individual.

         "Agreement" means this Limited Partnership Agreement as originally
executed and as subsequently amended or supplemented from time to time in
accordance with section 54.

         "Assignment" means a sale, exchange, gift, pledge, transfer or
disposition of any kind whatsoever and, in the case of a Person that is not an
individual, it includes the sale, exchange, pledge, transfer or disposition of a
majority of either voting control or the equity interests in such Person.



<PAGE>   6



         "Bankruptcy" means taking advantage of any bankruptcy or insolvency act
(including the Bankruptcy Reform Act of 1978 or similar law, and also any
proceeding under state or local insolvency or debtor relief laws), or a final
adjudication of insolvency or an assignment of a major portion of a Person's
assets for the benefit of creditors.

         "Capital Account" has the meaning set forth in section 12.

         "Capital Contribution" means the total amount of cash, and net fair
market value of securities and other property contributed by a Partner to the
equity of the Partnership, or agreed to be contributed by a Partner to the
equity of the Partnership, pursuant to section 11(a), and reduced by any return
of capital to the Partner within the meaning of section 11(c). Any reference in
this Agreement to the Capital Contribution of either a Partner or an assignee of
a Partner shall include the Capital Contribution of any prior Partner to whose
Partnership Interest the then existing Partner or assignee succeeded.

         "Cash Flow" means the excess of cash derived by the Partnership from
all sources, including from capital contributions, loans, sales of securities
and other activities, (but excluding cash derived from the winding-up and
liquidation of the Partnership pursuant to section 37) over the sum of all cash
disbursements, including repayments of loans from Partners, loans to Partners
for the Partnership, and distributions to Partners pursuant to section 16(a) or
(b) (but excluding disbursements pursuant to section 16(c), plus a reasonable
allowance for reserves for repairs, investments in Property (including
Marketable Securities), replacements, contingencies and anticipated obligations
(including debt service, capital improvements and replacements to the extent not
funded by reserves) as reasonably determined by the Managing General Partner.
Notwithstanding the preceding sentence, in determining the reasonable allowance
for reserves, the Managing General Partner shall reduce such allowance to the
extent necessary to ensure that annual distributions of Cash Flow to each
Partner will be in an amount at least equal to the annual income tax liability
(exclusive of income tax liability resulting from a transaction pursuant to
section 16(b) or (c)) of each such Partner (determined assuming that the maximum
possible income tax rate is applicable) resulting from the allocation to the
Partner of his share of the Partnership's Taxable Income and Taxable Loss. Cash
Flow is to be calculated separately for each Partner on the theory that each
Partner owns the assets of the Partnership contributed by such Person directly.
For this purpose, if a Partner has contributed Marketable Securities to the
Partnership, such Marketable Securities (including stock dividends thereon,
stock splits or other recapitalizations) shall be allocated to the contributing
Partner (or such Partner's assigns). In addition, Cash Flow shall be calculated
and distributed separately for each of the Class A Partnership Interests and the
Class B Partnership Interests and the assets of the Partnership allocated to
such interests.


                                       -6-

<PAGE>   7



         "Class A Partnership Interest" means an interest in the Partnership
represented by the Capital Account associated only with the Partnership's
ownership of those assets listed on Exhibit A-1 attached hereto and made a part
hereof (the "Class A Properties"), and the right to receive a percentage share
of the income, gain, loss, deduction, cash and other distributions and
liquidation proceeds associated with such property, all subject to and
interpreted in accordance with the terms of this Agreement. A Class A
Partnership Interest may be expressed in units with each unit representing
ownership of a one percent interest in the Class A Properties.

         "Class B Partnership Interest" means an interest in the Partnership
represented by a partner's Capital Account relating to all assets of the
Partnership other than those assets listed on Exhibit A-1 attached hereto and
made apart hereof, (i.e., excluding the Capital Account relating to the Class A
Properties), and the right to receive his percentage share of the income, gain,
loss, deduction, cash and other distributions and liquidation proceeds of the
Partnership (other than those associated with Class A Partnership Interests),
all subject to and interpreted in accordance with the terms of this Agreement.

         "Code" means the Internal Revenue Code of 1986, as amended, or any
subsequent federal law concerning income taxes that is enacted in substitution
for the Code.

         "General Partner" means any Person admitted as a general partner in
accordance with this Agreement.

         "General Partnership Interest" means the Partnership Interest of a
General Partner, in his capacity as a General Partner.

         "Limited Partner" means any Person admitted as a limited partner in
accordance with this Agreement.

         "Limited Partnership Interest" means the Partnership Interest of a
Limited Partner, in the capacity as a Limited Partner.

         "Majority in Interest" when used in regard to the degree of consent,
approval or agreement required among the Partners, means Partners whose
aggregate Percentage Interests constitute over 50% of the total aggregate
Percentage Interests then outstanding.

         "Managing General Partner" means the Person designated in this
Agreement as the general partner responsible for management of the affairs of
the Partnership, including all voting rights with respect to, and control over,
Marketable Securities, and thereafter any Person which becomes a general partner
responsible for management of the affairs of the Partnership pursuant to this
Agreement, in the Person's capacity as a managing general partner of the
Partnership.

                                       -7-

<PAGE>   8




         "Marketable Securities" means securities, including stock, which are
traded on an established securities market, whether or not registered under the
Securities Act of 1933.

         "Partner" means each Person which is a General Partner or a Limited
Partner.

         "Partnership" means the SILVERSTEIN INVESTMENTS LIMITED PARTNERSHIP,
the limited partnership formed in accordance with the Act pursuant to this
Agreement.

         "Partnership Interest" includes only a Partner's Capital Contribution
and right to receive his Percentage Interest and excludes Partnership Rights.

         "Partnership Rights" excludes the Partnership Interest of a Partner,
and includes, in addition to other rights provided in this Agreement, the rights
provided to him by the Act except to the extent such rights are inconsistent
with the provisions of this Agreement.

         "Percentage Interest" shall mean a partner's percentage share from time
to time of the Net Profits and Net Losses, taxable income or taxable loss, Cash
Receipts, cash and other distributions and liquidation proceeds of the capital
of the Partnership attributable to a particular class of Partnership Interests
all subject to and interpreted in accordance with the terms of this Agreement.
The Percentage Interest of partners for each class of Partnership Interests
shall be proportionate to the Capital Accounts of the partners in that class of
Partnership Interest at all times so that, for example, if a Partner's Capital
Account in one class is 100 and the aggregate of all Capital Accounts in the
same class of Partnership Interest is 1000, the partner's Percentage in that
class of the Partnership is 10%. Except as otherwise provided in this Agreement,
in the event of a change among the partners in the Percentage Interest in the
Partnership during the year, the Partnership shall use a closing-of-the-books
method with respect to such change or changes in Percentage Interest in
computing a partner's share of profits and losses, taxable income and taxable
losses, and entitlement to distributions during such year.

         "Person" means any individual and any general or limited partnership,
corporation, estate, joint venture, trust, business trust, cooperative,
association or other organization.

         "Profits and Losses" means the annual net income or loss of the
Partnership determined on a generally accepted accounting principles basis, as
disclosed on the annual financial statements of the Partnership, except that
Profits and Losses shall be computed separately for each of the Class A
Partnership Interests and Class B Partnership Interests. If the Partners have
elected for the Partnership to be excluded from the application of Subchapter K
of Chapter 1 of the Code, the provisions relating

                                       -8-

<PAGE>   9



to Profits and Losses shall be of no effect during such period at the
Partnership level, but will be separately computed for each Partner.

         "Property" means any real, personal, tangible or intangible property
contributed by a Partner to the equity of the Partnership or otherwise acquired
by the Partnership.

         "Pro Rata" means in the proportion that the Percentage Interest of each
Partner bears to the total Percentage Interests of all the Partners.

         "Retirement" means the death, Bankruptcy, adjudication of incompetency
as determined by a court of appropriate jurisdiction, dissolution and
liquidation or termination of existence, merger or consolidation (except as
provided in sections 33 and 34) of a Partner, or the sale, lease or other
disposition of all or substantially all the property of a Partner (except as
provided in sections 33 and 34).

         "Taxable Income or Taxable Loss" means the net income or loss of the
Partnership for federal income tax purposes, as determined at the close of the
Partnership's fiscal year by the accountants employed by the Partnership to
prepare its income tax returns. If the Partners have elected for the Partnership
to be excluded from the application of Subchapter K of Chapter 1 of the Code,
the provision shall be of no effect for federal income tax purposes during such
period, but will be separately computed for each Partner.

         2. Captions and Certain Terms. The titles and captions preceding the
text of the articles and sections of this Agreement are solely for convenience
of reference and neither constitute a part of this Agreement nor affect its
meaning, interpretation, or effect. The words "hereby," "herein," "hereof,"
"hereto," "hereunder," and terms of similar import refer to this Agreement as a
whole and not to any particular article, section, subsection or other part of
this Agreement.

         3. Severability. If any article, section or other provision of this
Agreement, or its application, is held to be invalid, illegal or unenforceable
in any respect or for any reason, the remainder of this Agreement and the
application of such article, section or other provision to a person or
circumstance with respect to which it is valid, legal and enforceable is not
affected.

         4. Limitation of Grant. Nothing in this Agreement, whether express or
implied, is intended or may be construed to confer upon, or to grant to, any
creditor or any other Person (other than the Partners and their legal and
personal representatives, heirs, successors and permitted assignees) any right,
remedy or claim under or because of this Agreement or any covenant, condition or
stipulation of it.



                                       -9-

<PAGE>   10



                                   ARTICLE II

                           ORGANIZATION OF PARTNERSHIP

         5.       A. Formation, Name, Office and Registered Agent. The
Partnership was organized as of the effective date of this Agreement and the
signatories to this Agreement constitute the members of this Partnership under
the Act as of such date and as of the date hereof. The rights and obligations of
the Partners are determined by the Act, except as otherwise expressly provided
in this Agreement. The name of the Partnership is "SILVERSTEIN INVESTMENTS
LIMITED PARTNERSHIP." The recordkeeping office of the Partnership and its
principal place of business are located at the residence of the Managing General
Partner where the Managing General Partner performs administrative services on
behalf of the Partnership. The Partnership does not have a principal business
office. The Managing General Partner may change the name of the Partnership or
may designate the location of its principal business office at any time and from
time to time by giving written notice of such change to each Partner. The
registered agent and registered office of the Partnership is The Corporation
Trust Company, 1209 Orange Street, Wilmington, DE 19801.

                  B. General and Limited Partners. Carol Allison was the initial
Managing General Partner of the Partnership but Carol Allison resigned on the
date indicated on the signature page hereto and was replaced by Steven Blechner
as the General Partner of the Partnership. The initial Limited Partner of the
Partnership is Barry Silverstein.

                  C. Certificate of Limited Partnership. In connection with the
execution of this Agreement, the Managing General Partner signed a certificate
of limited partnership, pursuant to the Act. The Managing General Partner shall
cause the certificate to be filed with the Delaware Secretary of State. The
certificate also has been amended to implement the change in General Partners.
The Managing General Partner shall amend the certificate when required under
this Agreement and shall execute the amended certificate as required by the Act.

         6.       Purpose of Partnership.

                           (a)      Except as provided in 6(c) below, the
                                    purposes of the Partnership are to:

                                    (i)      invest in, own, sell, acquire,
                                             manage and exercise the voting
                                             rights associated with Marketable
                                             Securities,

                                    (ii)     after approval by a Majority in
                                             Interest, acquire, hold, sell, own,
                                             improve, develop or lease other
                                             types of property in addition to
                                             Marketable Securities, and

                                      -10-

<PAGE>   11




                                    (i)      engage in any other lawful activity
                                             for profit approved by an
                                             affirmative vote of a Majority in
                                             Interest.

                           (b)      Notwithstanding Section 6(a), unless
                                    unanimously approved by the Partners, the
                                    Partnership shall not engage in any
                                    activity(ies) which would result, based upon
                                    opinion of tax counsel, in the
                                    characterization of the Partnership as an
                                    investment company as that term is used in
                                    Section 721(b) or any successor provision of
                                    the Code.

                           (c)      Subsequent to the date of commencement of
                                    existence of the Partnership, the Partners
                                    may make the election set forth in Treas.
                                    Reg. ss. 1.761-2 to have the Partnership
                                    excluded from the application of Subchapter
                                    K of Chapter 1 of the Code until such time
                                    as a Majority in Interest determine to have
                                    the Partnership engage in an activity other
                                    than investing in Marketable Securities and
                                    other intangible assets. Until such time as
                                    the Partnership engages in other than
                                    investment activities, and if the
                                    aforementioned election is made, it is the
                                    intention of the Partners that the
                                    Partnership shall be only for investment
                                    purposes and shall not actively conduct
                                    business. It is the intention of the
                                    Partners that the Partnership shall have
                                    legal title to, and ownership of, Marketable
                                    Securities, so as to effectuate the
                                    co-ownership of the Marketable Securities by
                                    the Partners. As is evidenced by various
                                    provisions of this Agreement, each Partner
                                    reserves the right separately to take or
                                    dispose of their shares or interests in the
                                    Marketable Securities and the other assets
                                    contributed by such Partner to the
                                    Partnership. Further, during the period
                                    Subchapter K does not apply to the
                                    Partnership, this Agreement is to be
                                    interpreted in a manner that will give
                                    effect to such election.

         7. Term of Partnership. The term of the Partnership shall continue
until the earlier of (i) December 31, 2020, or (ii) the death or adjudication of
incompetency as determined by a court of appropriate jurisdiction of Barry
Silverstein, unless the Partnership is earlier dissolved and terminated under
this Agreement.

         8. Authorized Acts. In furtherance of its purposes, but subject to
every other provision of this Agreement, the Partnership, through, and only
through, the actions of the Managing General Partner acting alone, is authorized
to do the following:


                                      -11-

<PAGE>   12



                  (a) acquire by purchase, lease or otherwise, any real or
personal, tangible or intangible property that may be necessary, convenient or
incidental to the accomplishment of the purposes of the Partnership;

                  (b) construct, operate, maintain, finance, improve, own, sell,
convey, exchange, assign, mortgage or lease any property (or a part thereof) as
may be necessary, convenient or incidental to the accomplishment of the purposes
of the Partnership;

                  (c) borrow money and issue evidences of indebtedness in
furtherance of any purpose of the Partnership and secure the same by a mortgage,
pledge, security interest or other liens on the property, any part thereof, any
interest therein or on any improvements thereto;

                  (d) prepay, in whole or in part, refinance, increase, renew,
modify or extend any indebtedness of the Partnership and, in connection
therewith, extend, renew or modify any mortgage, pledge, security interest or
other lien affecting any property;

                  (e) invest and reinvest the assets of the Partnership in, and
purchase, acquire, hold, sell, transfer and exchange securities of all kinds,
including Marketable Securities;

                  (f) lend money to Partners;

                  (g) exercise the voting rights associated with property owned
by the Partnership; and

                  (h) enter into any activity and perform and carry out any
contract in connection with, or necessary or incidental to, the accomplishment
of the purposes of the Partnership.

         9. Co-Ownership of Partnership Interests. Any consent required by a
Partner shall require the action or vote of each Person (or in such other manner
as such Persons have designated in writing to the Partnership) having an
interest in such Partnership Interest, with a majority approval needed for
consent. On the death of a co-owner of a Partnership Interest held in either
joint tenancy with right of survivorship or tenancy by the entirety, the
Partnership Interest is owned solely by the survivor as a Partner, and not as an
assignee. The Partnership need not (although it may) recognize the death of a
co-owner of a Partnership Interest until the Managing General Partner receives
notice of the death. A co-owner of a Partnership Interest may sever the tenancy
by giving to the Managing General Partner notice to that effect, and signed by
the co-owner requesting the severance in the case of a joint tenancy, and by
both co-owners in the case of a tenancy by the entirety. Upon receipt of the
notice and

                                      -12-

<PAGE>   13



the certificate evidencing the Partnership Interest owned by the co-owners, the
Managing General Partner shall cause the Partnership Interest to be allocated as
directed by the co-owners and shall indicate on the Partnership records such
allocation. In absence of joint direction, the interests shall be allocated
between the owners as the severed ownership interests would be valued for
federal estate tax purposes.

         10. Representations and Warranties of the Limited Partners. As a
condition to becoming a Limited Partner of the Partnership, each Limited Partner
represents, warrants, and covenants to each General Partner and the Partnership
as follows:

                  (a) He will not assign, sell, mortgage, pledge, or otherwise
transfer or encumber any of his rights under this Agreement except as expressly
permitted under this Agreement and applicable laws;

                  (b) He was granted full and unrestricted access to the
Partnership's business premises, offices and properties and its business,
partnership and financial books and records as he required, and was permitted to
examine the foregoing, to question the General Partner, and to make all other
investigations that he considered appropriate to determine or verify the
business or condition (financial or otherwise) of the Partnership and to
consummate the transactions contemplated by this Agreement;

                  (c) The Partnership furnished him all additional information
concerning the Partnership's business and affairs that he requested;

                  (d) He was permitted to ask questions of, and to receive
answers from, the General Partner concerning the terms and conditions of an
investment in a Limited Partnership Interest, and to obtain all additional
information he considered necessary to verify the accuracy of the information
received by him from the General Partner, and he understands the risks
associated with an investment in the Partnership and that such an investment is
highly speculative;

                  (e) Because of his considerable knowledge and experience in
financial and business matters in general and securities investments in
particular, he is able to evaluate the merits, risks, and other factors bearing
on the suitability of a Limited Partnership Interest as an investment;

                  (f) His income and net worth are such that he is not now, and
does not contemplate being, required to dispose of any investment in the
Partnership to satisfy any existing or expected obligation, and he is otherwise
fully able to bear the economic risks of his proposed investment in the
Partnership, including the risk of losing all or any part of his investment in
the Partnership and the probable inability to sell, transfer, or pledge, or
otherwise dispose of an investment in the Partnership for an indefinite period;

                                      -13-

<PAGE>   14




                  (g) He is acquiring a Limited Partnership Interest solely for
his own account, as principal, for investment purposes and not with a view to or
for resale in connection with any distribution or underwriting of any
Partnership Interests;

                  (h) He understands that the Limited Partnership Interest that
he will purchase has not been and will not be registered under either the
Securities Act of 1933 or any state securities law, that he must hold the
Limited Partnership Interest indefinitely unless the Partnership Interests are
subsequently registered under those laws or transferred in reliance on advice of
counsel satisfactory to the Partnership that registration under those laws is
not required, and that stop-transfer instructions will be noted in the
appropriate records of the Partnership;

                  (i) He understands that the document evidencing a Limited
Partnership Interest acquired by him will bear the following legend:

         These securities have not been registered under either the Securities
         Act of 1933 or any state securities law and were acquired pursuant to
         an investment representation by the record owner. These securities are
         not transferable absent either registration under the Act and every
         applicable state securities law or advice of counsel satisfactory to
         the Partnership that registration in not required. Additionally, these
         securities are subject to certain transfer restrictions set forth in
         the Limited Partnership Agreement of the Partnership. Reference may be
         made to the Limited Partnership Agreement for the details of those
         restrictions.

                  (j) He understands that a legend substantially identical to
the one described above will be placed on every new document issued upon a
transfer of a Limited Partnership Interest;

                  (k) He shall not sell, transfer, pledge, or otherwise dispose
of any part of his Limited Partnership Interest, unless the Partnership
Interests are registered under the Securities Act of 1933 and under every
applicable state securities law or unless the Partnership is furnished with
advice of counsel satisfactory to it that registration under those laws is not
required; and

                  (l) He understands that the Partnership does not file periodic
reports with the Securities and Exchange Commission pursuant to the Securities
Exchange Act of 1934.



                                      -14-

<PAGE>   15



                                   ARTICLE III

                               PARTNERSHIP CAPITAL

         11. Capital Contributions.

                  (a) Upon executing this Agreement, each Partner shall make or
has made a Capital Contribution in the amount and of the type, and initially
shall have a Percentage Interest equal to the percentage, set forth opposite his
name on EXHIBIT A. Partners may make (but Limited Partners are not required to
make) additional Capital Contributions at such time and in such amount as they
in their sole discretion shall determine but only if the Managing General
Partner and a Majority in Interest consent to such additional Capital
Contributions. Upon the assignment of any Partnership Interest, the making of an
additional Capital Contribution or any return of a Capital Contribution, or any
substitution of a Partner, EXHIBIT A shall be amended to accurately reflect the
name, address, Capital Contribution and Percentage Interest of each Partner.
Each Parties will also be assigned either or both as Class A and Class B
Partnership Interest depending on the assets contributed by each Partner and as
they shall mutually agree at the time of contribution.

                  (b) Notwithstanding (a) above, no Capital Contributions shall
be made or permitted by any Partner which would result, directly or indirectly,
in the Partnership being treated as an investment company under section 721(b)
of the Code, and any such attempted Capital Contribution shall be void ab
initio. The Managing General Partner shall withhold its consent to the making of
an additional Capital Contribution, unless it has satisfied itself (by seeking
advice of legal counsel or otherwise) that the making of the additional Capital
Contribution will not result, directly or indirectly, in the Partnership being
treated as an investment company under section 721(b) of the Code.

                  (c) A Partner shall not receive from the Managing General
Partner or out of Partnership Property, and the Managing General Partner and the
Partnership shall not return to a Partner, any part of his Capital Contribution,
except as set forth in Articles V, VIII and IX of this Agreement and such
distribution is determined to be a return of a Partner's Capital Contribution,
and then only if all liabilities of the Partnership, except liabilities to the
Partners on account of their Capital Contributions, have been paid or there
remains property of the Partnership sufficient to pay them. The Partnership
shall not pay interest on Capital Contributions, and, a Partner may demand and
receive only cash in return for his Capital Contribution, except to the extent
provided for in Articles V and IX of this Agreement or unless the Liquidator (as
defined in section 37) decides to distribute Partnership property in kind upon
the dissolution, winding-up, and termination of the Partnership, or unless the
distribution of property to a Partner is unanimously approved by the Partners.
Each Partner, by signing this Agreement or a counterpart

                                      -15-

<PAGE>   16



of it, consents to all distributions authorized by this Agreement and releases
all other Partners from all liability to both him and the Partnership for all
distributions made in accordance with this Agreement.

         12. Capital Account.

                  (a) The Managing General Partner shall establish and maintain
a Capital Account for each Partner in the Partnership's books of account.
Capital Accounts shall be maintained and adjusted in accordance with generally
accepted accounting principles. A Limited Partner shall not be obligated to
restore a deficit balance in its Capital Account, except to the extent required
by the Act. Consistent with these capital account maintenance rules, the
Managing General Partner shall credit to each Partner's Capital Account the
amounts of the Partner's Capital Contributions and any Profits allocated to the
Partner. The Managing General Partner shall charge to or deduct from each
Partner's Capital Account the amounts of all distributions (in cash or other
property) or the Partner and any Losses allocated to the Partner. If any
interest in the Partnership is transferred in accordance with the terms of this
Agreement, the transferee shall succeed to the Capital Account of the
transferror to the extent it relates to the transferred interest.

                  (b) The provisions of this section and the other provisions of
this Agreement pertaining to the maintenance of Capital Accounts are intended to
comply with Treasury Regulation Section 1.704-1(b) (or any successor provision
thereto), and shall be interpreted and applied in a manner consistent with such
Regulations. In the event that Managing General Partner determines that it is
prudent to modify the manner in which the Capital Accounts are computed in order
to comply with such Regulations, provided that it is not likely to have a
material effect on the amounts distributable to any Partner without such
Partner's consent and upon receipt of an opinion of tax counsel to the
Partnership concluding that such modification will be given effect for federal
income tax purposes, the Managing General Partner may make such modification.

                  (c) The Managing General Partner shall revalue the
Partnership's Property (based on its fair market value as of the moment
immediately preceding the relevant event) and shall adjust Capital Accounts to
take into account any resulting Profit or Loss (determined as if the Partnership
sold all its Property for cash equal to the Property's fair market value) upon
the occurrence of either of the following events: (1) the making by any Partner
of any non-Pro Rata additional Capital Contribution, (2) the partial or complete
withdrawal of a Partner's Partnership Interest, or (3) the admission of a
Partner.

                  (d) For the purposes of determining Percentage Interests,
making allocations and distributions pursuant to Articles IV and V, and wherever
else relevant in this Agreement, multiple Capital Accounts shall be maintained
for each partner who

                                      -16-

<PAGE>   17



owns more than one class of Partnership Interest. A combined Capital Account
shall also be maintained for each partner who has more than one class of
Partnership Interest. The combined Capital Account shall be relevant for
determining the total amount of distributions to a partner in the event of the
liquidation of the Partnership. In the event that a Partner with more than one
class of Partnership Interest has a positive combined Capital Account balance at
the time of the liquidation of the Partnership, but has a deficit in one of the
separate Capital Accounts, liquidating distributions shall be made only to the
extent of the net positive balance.

         13. Expenses Paid by Partners. Any Partnership expense reasonably paid
by any Partner on behalf of the Partnership is an indebtedness of the
Partnership to the Partner and does not increase the Partner's Partnership
Interest or Percentage Interest. The Partnership shall reimburse the Partner as
soon as practicable and may pay interest on the indebtedness.

         14. Loans by Partners; Restrictions on Borrowing. The Managing General
Partner may borrow money on behalf of the Partnership from any Partner in such
amounts and for such purposes as it considers necessary, convenient or
incidental to the accomplishment of the purposes of the Partnership. Each loan
to the Partnership by a Partner (excluding reimbursable expenses) shall be
evidenced by a promissory note or similar instrument of the Partnership, may be
secured by a lien on the Property, may bear interest at a rate determined by
agreement between such Partner and the Managing General Partner and may be
subject to such other terms and conditions as are agreed to by such Partner and
the Managing General Partner. The Partnership may prepay each loan from a
Partner in whole or in part, at any time and from time to time, without premium
or penalty. The Managing General Partner may not borrow money from persons other
than Partners or pledge Partnership assets without the express written consent
of the non-managing general partner.


                                   ARTICLE IV

             PROFITS AND LOSSES AND TAXABLE INCOME AND TAXABLE LOSS

         15. Allocations.

                  (a) Allocation of Profits and Losses.

                           (i) Profits and Losses of the Partnership shall be
determined for each fiscal year of the Partnership in accordance with the cash
method of accounting, with such exceptions thereto as are set forth in this
Agreement, and otherwise in accordance with generally accepted accounting
principles applied in a consistent manner.


                                      -17-

<PAGE>   18



                           (ii) Except as otherwise provided, the Partnership's
Losses, if any, arising in a fiscal year shall be allocated among the Partners
as follows:

                                    (1) FIRST: To the extent of the aggregate
positive Capital Account balances of the Partners as of the end of the fiscal
year, Pro Rata to the Partners taking into account any changes in Partnership
Percentage Interests during the fiscal year.

                                    (2) SECOND: Pro Rata, to the General
Partner.

                           (iii) Profits arising in a fiscal year shall be
allocated among the Partners as follows:

                                    (1) FIRST: To the General Partner until
Profits allocated to the General Partner during the term of the Partnership
pursuant to this Section 15(a)(ii)(1) equal Losses allocated to the General
Partner during the term of the Partnership pursuant to Section 15(a)(ii)(2) then

                                    (2) SECOND: To the Partners Pro Rata taking
into account any changes in Partnership Percentage Interests during the fiscal
year.

                  (b) Allocation of Taxable Income and Taxable Loss.

                           (i) Except as otherwise provided in this section
15(b), allocations of tax items among the Partners shall be consistent with
corresponding book (Profits and Losses) items (if any). For tax purposes,
Profits and Losses, or any item thereof, shall be appropriately adjusted to
reflect Taxable Income and Taxable Loss, or any item thereof, as determined
under the Code and shall be allocated among the Partners in such a manner as to
comply with the provisions of the Code and Regulations thereunder (including, if
necessary, the "minimum gain chargeback provisions" of the Regulations under
Section 704 of the Code). For example, any gain or loss recognized by the
Partnership with respect to property contributed to the Partnership by a Partner
shall be shared among the Partners so as to take account of the variation, if
any, between the basis of the property to the Partnership and its fair market
value at the time of contribution or revaluation, whichever is applicable, so as
to comply with the requirements of Section 704 of the Code. Thus, for example,
if a Partner contributes Property to the Partnership whose agreed fair market
value exceeds its adjusted basis in the hands of the contributing Partner
("built-in gain"), and there have been no events giving rise to a revaluation,
built-in gain with respect to such contributed Property shall first be allocated
to such contributing Partner when the Partnership recognizes gain upon a
disposition of such contributed Property, but not in an amount in excess of such
built-in gain; the remaining balance of such recognized gain, if any, shall be
allocated among the Partners as set forth herein. The allocation of built-in
gain to a contributing Partner shall not increase such Partner's Capital

                                      -18-

<PAGE>   19



Account, because such gain was already taken into account when the built-in gain
property was contributed to the Partnership. A Partner who contributes property
other than cash shall provide the Managing General Partner with information
necessary to verify the contributing Partner's adjusted tax basis in the items
of property contributed by him to the Partnership.

                           (ii) Generally, except as provided in section
15(b)(i), Taxable Income and Taxable Loss (and each such income and loss item)
shall be allocated Pro Rata among the Partners. In the event, however, that
non-Pro Rata distributions of property are made to a Partner or the net proceeds
from the sale of property are distributed non-Pro Rata to a Partner, Taxable
Income and Taxable Loss derived from such distributions or sales shall be
allocated 100% to such Partner, subject only to such modifications as are
necessary to comply with Section 704 of the Code. In addition, no allocations of
Taxable Loss shall be made to a Limited Partner that would create a deficit
balance in the Limited Partner's Capital Account.


                                    ARTICLE V

                      DISTRIBUTIONS, WITHDRAWALS AND LOANS

         16. Distributions.

                  (a) Cash Flow Distributions. Cash Flow is to be distributed
periodically as the Managing General Partner shall determine.

                  (b) Partial or Complete Withdrawal by a Partner From the
Partnership.

                           (i) In the event of a partial or complete withdrawal
of a Partner from the Partnership pursuant to Article VIII, the Managing General
Partner shall, as promptly as is reasonably possible, distribute to the Partner
any assets then owned by the Partnership that were previously contributed by
such Partner to the Partnership but this distribution shall be limited to the
extent it would cause the Capital Account of such Partner to be negative. If the
Partner has a positive Capital Account balance, then the Partnership shall
distribute to the Partner his Pro Rata share of the Marketable Securities, cash
and other readily divisible assets of the Partnership. The withdrawing Partner
shall also be entitled to receive cash equal in value to his Pro Rata share of
the fair market value (as reasonably determined by the Managing General Partner)
of any non-readily divisible assets owned by the Partnership. The Managing
General Partner shall, as promptly as possible, distribute this additional
amount of cash, if any, to the withdrawing Partner. Cash distributions to the
withdrawing Partner shall be reduced by such Partner's Pro Rata share of the

                                      -19-

<PAGE>   20



liabilities of the Partnership and by any expenses incurred by the Partnership
with respect to the withdrawal of the Partner.

                           (ii) A Partner may request that all or a portion of
the Marketable Securities subject to the requested withdrawal be sold by the
Partnership and the net proceeds (after selling and other expenses) distributed
as directed by him. In the event that the Managing General Partner is unable or
unwilling to sell these Marketable Securities, it shall distribute them to the
Partner, unless it is notified by the Partner to cancel the withdrawal.

                           (iii) The Managing General Partner shall not be
required to distribute to the requesting Partner any assets that the Partnership
is legally restricted or prohibited from distributing to the Partner, unless
steps can be taken to remove the restriction or prohibition; in which case the
requesting Partner shall be charged with the expense of removing such
restriction or prohibition. Any distribution hereunder shall also be subject to
the limitations set forth in sections 11(c) and 17, respectively.

                  (c) Liquidating Distributions. The net proceeds from
liquidation of the Partnership's assets pursuant to its dissolution, winding-up,
and termination shall be distributed, and all Profits and Losses resulting from
the liquidation of the Partnership Property shall be allocated, among the
Partners in the proportions and orders of priority specified in this section
16(c).

                           (i) The Liquidator shall distribute the net proceeds
from liquidation of the Partnership's assets as follows:

                                    (1) FIRST: To pay all the liabilities of the
Partnership that are then due and payable, except for both Capital Contributions
of Partners and liabilities to the Partners, in the order of priority required
by Delaware law; then

                                    (2) SECOND: To establish any reasonable
reserve that the Liquidator may determine is required for unpaid, future, or
contingent liabilities or obligations of the Partnership; then

                                    (3) THIRD: To pay all liabilities of the
Partnership to the Partners; Pro Rata according to the amounts of their
respective liabilities; then

                                    (4) FOURTH: To the Partners to the extent of
any positive balances in their Capital Accounts, Pro Rata according to the
amounts of their respective positive balances; then

                                    (5) FIFTH: Any remaining net proceeds shall
be distributed Pro Rata among the Partners.

                                      -20-

<PAGE>   21




                           (ii) Any Profits and Losses and Taxable Income and
Taxable Loss resulting from the disposition of the Partnership's assets in the
process of liquidation shall be allocated among the Partners in the manner
provided in section 15. Any Property distributed in kind in the liquidation
shall be valued and treated as if the Property were sold and the cash proceeds
were distributed. The Profits and Losses arising from the constructive sale of
the Property described in the preceding sentence shall be allocated among the
Partners in the manner provided in section 15.

         17. Limitation on Distributions to Partners. A Partner may receive
distributions from the Partnership only to the extent the Partnership's total
assets exceed its total liabilities, other than liabilities to the Partners on
account of their Capital Contributions.


                                   ARTICLE VI

                 AUTHORITY, DUTIES, AND LIABILITIES OF PARTNERS

         18. Duties of Managing General Partner. The Managing General Partner,
and no other Partners, shall manage the affairs of the Partnership, shall apply
himself diligently for the Partnership, and shall devote to the Partnership such
time as is necessary and appropriate to manage the business of the Partnership.
The Managing General Partner is not required to devote all its business time to
the Partnership, and it may engage in other business ventures and employment,
including those in competition with the Partnership. In the performance of its
duties, the Managing General Partner may hire employees and agents of the
Partnership and generally shall supervise and direct all the daily operations of
the Partnership.

         19.      Managing General Partner's Fees and Expenses.

                  (a) Fees to Managing General Partner. In consideration for
performing services described herein, the Managing General Partner may be paid a
fee as agreed to by a Majority in Interest. Such fees shall be deemed earned
when the services have been performed and, regardless of when paid, shall be
non-executory from the date earned and shall be the obligation of the
Partnership from and after that date.

                  (b) Expenses. Except as otherwise provided herein, the
Partnership shall pay all expenses of the Partnership (which expenses may be
either billed directly to the Partnership or reimbursed to the Managing General
Partner) which may include, but are not limited to: (i) all costs of borrowed
money, taxes and assessments on the Property and other taxes applicable to the
Partnership; (ii) all costs for goods and materials, whether purchased by the
Partnership directly or by the Managing General Partner on behalf of the
Partnership; (iii) legal, audit, accounting,

                                      -21-

<PAGE>   22



brokerage and other professional fees; (iv) fees and expenses paid to
independent contractors, mortgage bankers, brokers, insurance brokers and other
agents; (v) expenses of organizing, revising, amending, converting, modifying or
terminating the Partnership; (vi) expenses in connection with distributions made
by the Partnership to, and communications and bookkeeping work necessary in
maintaining relations with, Partners; (vii) expenses in connection with
preparing and mailing reports to Partners; (viii) costs of any accounting,
statistical or bookkeeping equipment necessary for the maintenance of the books
and records of the Partnership; (ix) the cost of preparation and dissemination
of informational material and documentation relating to the Partnership; (x)
except with respect to litigation solely among the Partners as such, costs
incurred in connection with any litigation in which the Partnership is involved,
as well as in the examination, investigation or other proceedings, conducted
against the Partnership by any regulatory agency, including legal and accounting
fees incurred in connection therewith; (xi) costs of any computer services or
equipment or services of personnel used for or by the Partnership; and (xii)
expenses of professionals employed by the Partnership in connection with any of
the foregoing, including attorneys, accountants and appraisers.

         20. Authority of Managing General Partner. Except as otherwise provided
herein, the Managing General Partner may bind the Partnership to do all acts
that are necessary, appropriate, or incidental to the accomplishment of the
purposes of the Partnership. Any person dealing with the Partnership or the
Managing General Partner may rely on a certificate signed by the Managing
General Partner as to the identity of any Partner, the existence or absence of
any fact or condition that is necessary to permit action by either the
Partnership or the Managing General Partner or germane in any other way to the
affairs of the Partnership, and the persons who are authorized to execute and
deliver any documents or instruments of or on behalf of the Partnership. Without
limiting the generality of the foregoing, the Managing General Partner is
specifically authorized to do the following:

                  (a) to negotiate and enter into leases and agreements with
land or building owners or other Persons, and to incur obligations for, and on
behalf of, the Partnership in connection with Partnership business;

                  (b) to borrow money on behalf of the Partnership and, as
security therefor, to encumber the Property;

                  (c) to prepay, in whole or in part, refinance, increase,
modify or extend any obligation affecting the Property;

                  (d) to sell, exchange, convey and lease the Property;

                  (e) to employ from time to time, at the expense of the
Partnership, other Persons required for the operation and management of the

                                      -22-

<PAGE>   23



Partnership business, including accountants, attorneys and others, who may be
Partners, on such terms and for such compensation as the Managing General
Partner determines to be reasonable and this may include Persons which are
Affiliates;

                  (f) to pay all attorney's and accountant's fees and other
costs incurred in connection with the formation of the Partnership business and
the completion of all steps necessary or advisable for the Partnership to comply
with applicable laws;

                  (g) to assume the responsibilities imposed on the Managing
General Partner by the Act;

                  (h) to compromise, arbitrate or otherwise adjust claims in
favor of or against the Partnership and to carry such insurance as the Managing
General Partner considers advisable;

                  (i) to exercise the voting rights associated with the
securities and other Property owned by the Partnership;

                  (j) to commence or defend litigation with respect to the
Partnership or any assets of the Partnership as the Managing General Partner
considers advisable, at the expense of the Partnership;

                  (k) to make, execute, acknowledge and deliver documents of
transfer and conveyance and any other instruments that may be necessary or
appropriate to carry out its powers; and

                  (l) to do all such acts and take all such proceedings and
execute all such rights and privileges, although not specifically mentioned
herein, as the Managing General Partner considers necessary to conduct the
business of the Partnership and to carry out the purposes of the Partnership.

                  Notwithstanding the foregoing, the Managing General Partner
shall not take any of the following actions without the consent of a Majority in
Interest:

                           (1) assign all or any part of the property for the
benefit of its creditors or confess a judgment against the Partnership;

                           (2) take any action in contravention of the Act, the
certificate of limited partnership or this Agreement;

                           (3) sell, lease, transfer, assign, pledge or encumber
the property of the Partnership (except with respect to transactions to which
section 32 or section 37 applies);

                                      -23-

<PAGE>   24




                           (4) loan an amount of money in excess of $100,000 to
a Partner; or

                           (5) admit a Person as a General Partner of the
Partnership.

         21. Special Limitation. During the period the Partners have determined
that the Partnership will only be availed of only for investment purposes, which
shall be the period, if any, contemplated by Section 6(c), the Managing General
Partner may not purchase, sell, or exchange Marketable Securities or assets that
pertain to a Class B Partnership Interest or other security without the consent
of the Partners to whom the Marketable Securities are deemed owned or allocated
for federal income tax purposes, but the Managing General Partner shall have
voting rights and all other aspects of management and control over such
Marketable Securities and assets to which a Class B Partnership Interest
pertains.

         22. Dealing with Affiliates. The Managing General Partner may employ
and enter into contracts and other arrangements with any Person, including an
Affiliate, and may obligate the Partnership to pay reasonable compensation for
services rendered by such Persons on terms that, in the judgment of the Managing
General Partner, are not less favorable to the Partnership than would be
available from an unrelated party.

         23. Indemnification of General Partner. The Managing General Partner
need not secure the performance of its duties by bond or otherwise. A General
Partner is not liable, responsible, or accountable in damages or otherwise to
any Partner or to the Partnership for any act taken or omission made in good
faith on behalf of the Partnership and in a manner that such General Partner
reasonably believes to be within the scope of the authority granted to it by
this Agreement and in the best interest of the Partnership, except for gross
negligence or willful misconduct. Any loss, expense (including attorneys' fees)
or damage incurred by a General Partner by reason of any act or omission by it
in good faith on behalf of the Partnership and in a manner that it reasonably
believes to be within the scope of the authority granted to it by this Agreement
and in the best interest of the Partnership (but not, in any event, any loss,
expense or damage incurred by a General Partner by reason of gross negligence or
willful misconduct) shall be paid to the indemnified General Partner from the
Partnership's assets, to the extent available.

         24. Liability of Limited Partners. The liability of each Limited
Partner is limited to its Capital Contributions. Except as provided by the Act,
a Limited Partner is not required to contribute money to, or for the liabilities
of the Partnership, and is not personally liable for any loss, liability or
other obligations of the Partnership.

         25. Authority of Limited Partners and Non-Managing General Partners.
The Limited Partners shall not participate in the management of, or have any
control over,

                                      -24-

<PAGE>   25



the business or policies of the Partnership, nor any control over Marketable
Securities, except as required by the Act or permitted by section 20, and the
Limited Partners shall not transact any business in the name of the Partnership.
Notwithstanding the foregoing, the Partners may make the election set forth in
Treas. Reg. ss. 1.761-2 to have the Partnership excluded from the provisions of
Subchapter K of Chapter 1 of the Code. In the event a Partner ceases (whether
through removal, death, or resignation) to serve as Managing General Partner, a
Majority in Interest of the Partners shall appoint another Partner to serve as
the Managing General Partner.

                                   ARTICLE VII

                        TRANSFER OF PARTNERSHIP INTERESTS

         26. Limited Partners. A Limited Partner shall not pledge, encumber or
hypothecate his interest in the Partnership without the consent of the Managing
Partner. Otherwise, subject to sections 28 and 29, and only if the Managing
General Partner consents, a Limited Partner may make an Assignment of a Limited
Partnership Interest. However, an Assignment does not relieve the Limited
Partner of his obligations and liabilities under this Agreement, or constitute
the assignee a Limited Partner, or confer on the assignee any Partnership
Rights. An assignee of a Limited Partner's Partnership Interest may be admitted
and substituted as a Limited Partner and acquire Partnership Rights only upon
the satisfactory completion of the requirements specified in section 29. The
failure or refusal of the Managing General Partner to consent to the admission
of an assignee as a Limited Partner does not affect the right of the assignee to
the Partnership Interest of his predecessor in interest.

         27. General Partner. Subject to section 28, a General Partner may make
an Assignment, directly or indirectly, of all or any part of its Partnership
Interest. However, an Assignment does not relieve such General Partner of its
obligations and liabilities under this Agreement, or constitute the assignee a
General Partner, or confer on the assignee any Partnership Rights. Subject to
section 28, and only if a Majority in Interest consents, a General Partner may
make an Assignment of both its Partnership Interest and its Partnership Rights
if the assignee assumes in writing all such General Partner's obligations and
liabilities under this Agreement and if all the applicable requirements of
section 29 are satisfied. Upon compliance with the immediately preceding
sentence, an assignee of such General Partner has all the rights and powers
granted to such General Partner under this Agreement and has all the obligations
and liabilities of such General Partner under this Agreement.

         28. Restriction on Transfer. Notwithstanding any other provision of
this Agreement, an assignment of a Partnership Interest shall not be made, and
consent thereto shall be withheld:


                                      -25-

<PAGE>   26



                  (a) Unless the Managing General Partner has satisfied itself
(by seeking advice of legal counsel or otherwise, with any resulting Partnership
expense to be reimbursed by the assignor) that the assignment will not have any
significant adverse tax effect upon the Partnership or the other Partners;

                  (b) Unless the Managing General Partner has satisfied itself
(by advice of legal counsel, with any resulting Partnership expense to be
reimbursed by the assignor) that the proposed assignment may be made without
registration under any applicable securities law; and it will not violate any
applicable securities law (including investor suitability standards);

                  (c) If the Assignment is sought to be made to:

                           (i) a minor or incompetent, except if made by will or
intestate succession, or

                           (ii) to a Person which is not an Affiliate.

         29. Admission of Substitute Partner. Subject to the other provisions of
this Agreement, an assignee of a Partnership Interest may be admitted as a
Partner and granted Partnership Rights only if:

                  (a) the Assignment is made pursuant to a written instrument in
a form satisfactory to the Managing General Partner and specifies the intention
of the assignor that the assignee be substituted as a Partner;

                  (b) the Managing General Partner consents to the admission by
executing two counterparts of this Agreement that evidences the Partnership
Rights of the assignee, and if the assignee is to be admitted as a Partner a
Majority in Interest consent to the admission;

                  (c) the assignee accepts, signs and agrees to be bound by this
Agreement, by executing two counterparts of this Agreement, including an amended
EXHIBIT A, and such other documents or instruments as the Managing General
Partner requires to effect the admission of the assignee as a Partner;

                  (d) the assignee provides the Managing General Partner with
evidence satisfactory to it of the assignee's authority to become a Partner
under the terms of this Agreement;

                  (e) the assignee pays all filing, publication and other costs
(including reasonable attorneys' fees) incurred by either the Partnership or the
Managing General Partner in connection with the admission and substitution of
the assignee as a Partner.

                                      -26-

<PAGE>   27




                  Notwithstanding an assignee's satisfaction of any or all of
the conditions specified above, the Managing General Partner, in its absolute
discretion, may refuse to consent to the assignee's admission as a Partner, in
which event the assignee will not obtain any Partnership Rights, but will retain
only the rights of an assignee under sections 26 or 27.

         30. Rights of Partner After Assignment and Substitution. Upon the
Assignment of all his Partnership Interest, and the admission of a substitute
partner, a Partner shall cease to be a Partner and to have any Partnership
Rights.

         31. Allocations and Distributions After Assignment. For the purposes of
allocations of Profits and Losses, Taxable Income or Taxable Loss, and
distributions, an Assignment of a Partnership Interest is effective as to the
Partnership, and shall be reflected in the records of the Partnership, as of the
date that the Managing General Partner receives written notice of the
Assignment. The Taxable Income or Taxable Loss, Profits and Losses and cash and
other distributions in respect of the assigned Partnership Interest with respect
to the fiscal year in which the Assignment of the Partnership Interest occurs
shall be divided between the assignor and the assignee according to the method
provided to the Managing General Partner by the assignor and the assignee, so
long as such method is permitted under the Code and does not adversely affect
the other Partners or the Partnership from a tax or economic perspective. The
method of allocation shall be provided to the Managing General Partner in the
written notice of the Assignment. Any additional costs for computing the
allocations hereunder shall be paid by the assignor or assignee, as the case may
be. The written notice referred to above shall also contain information as to
whether the assignor or assignee shall be responsible for the payment of such
additional cost, if any.

                                  ARTICLE VIII

                 RETIREMENT, WITHDRAWAL, OR REMOVAL OF PARTNERS

         32. Withdrawal of General Partner or Limited Partner.

                  (a) A Limited Partner may, at any time, withdraw all or part
of his Partnership Interest from the Partnership by providing written notice
thereof to the Managing General Partner. Immediately after the receipt of such
written notice from a Partner, the Managing General Partner shall make the
appropriate distributions to the Partner in partial or complete redemption of
his Partnership Interest as set forth in section 16(b).

                  (b) A partial withdrawal by a Partner shall be made in
increments of one-tenth (1/10th) of one percent (1%) of a Percentage Interest.
The written notice of withdrawal from a Partner to the Managing General Partner
must

                                      -27-

<PAGE>   28



state whether the withdrawal is a partial or complete withdrawal and, if a
partial withdrawal, must state the Percentage Interest that is being withdrawn.
A Partner shall not make a partial withdrawal that will result in his remaining
Percentage Interest becoming less than one-tenth (1/10th) of one percent (1%)
immediately after the withdrawal.

                  (c) The Managing General Partner agrees that it will fully
cooperate to the extent permitted by law to accomplish a withdrawal requested by
a Partner hereunder. It also agrees that it will not take any action that will
obstruct or render impossible the application of this section 32 (such as to
pledge the Partnership's Marketable Securities as collateral to creditors of the
Partnership), unless such action is essential to accomplish the purposes of the
Partnership.

                  (d) The partial withdrawal of a Limited Partner does not
dissolve or terminate the Partnership unless there is only one Partner then
remaining. The remaining Partners shall amend this Agreement to reflect the
partial or complete withdrawal of the Partner from the Partnership, if and to
the extent necessary.

                  (e) Upon the giving of the notice of withdrawal pursuant to
Paragraph (a), and upon the dissolution of the Partnership, the voting rights
with respect to any Marketable Securities allocable to the Percentage Interest
being withdrawn shall be vested in the withdrawing Partner or Partners, and the
Partnership shall have no voting rights with respect to such stock.

                  (f) The complete withdrawal of all the Limited Partners shall
constitute a dissolution of the Partnership pursuant to Article IX.

         33. Retirement, Removal, or Withdrawal of Managing General Partner. The
Managing General Partner may withdraw any part of its General Partnership
Interest without the consent of a Majority in Interest. The Retirement, removal,
or withdrawal of the Managing General Partner shall dissolve the Partnership
only if there is no successor General Partner. Notwithstanding the foregoing or
anything else in this Agreement to the contrary, a merger, consolidation, or
reorganization of a Managing General Partner who is not a natural person, or a
sale of all or substantially all its assets that includes its Partnership
Interest, is not a Retirement or withdrawal of such Managing General Partner if
the resulting, surviving or acquiring Person is an Affiliate and becomes
substituted as the Managing General Partner of the Partnership. The resulting,
surviving or acquiring Person is substituted as the Managing General Partner
without further act if it gives notice of the substitution to the Partners
before the effective date of the merger, consolidation, reorganization or sale.
Each Partner consents to the admission and substitution of such substitute
Managing General Partner pursuant to this section 33, and no further consent or
approval of any Partner is required.


                                      -28-

<PAGE>   29



         34. Retirement of Limited Partner. The Retirement of a Limited Partner
does not dissolve or terminate the Partnership except as provided in section
36(g), but the legal or personal representatives, heirs, successors, assignees,
or stockholders of a Retired Limited Partner, subject to section 26, shall
succeed to the Partnership Interests of the Retired Limited Partner and may make
an Assignment of the Partnership Interests within the limitations set forth in
this Agreement.

         35. Rights of Partner After Retirement, Removal, or Withdrawal. A
Partner ceases to have any Partnership Rights upon his Retirement, removal, or
complete withdrawal from the Partnership. However, until the appropriate
distributions, if any, are made to a Retired, removed, or withdrawn Partner for
his Partnership Interest, the Retired, removed, or withdrawn Partner is entitled
to receive the allocations of Profits and Losses, Taxable Income or Taxable Loss
and all distributions referred to in section 16 applicable to his Partnership
Interest.

                                   ARTICLE IX

                                   DISSOLUTION

         36. Events of Dissolution. The Partnership shall be dissolved, and
unless reconstituted shall be terminated, upon:

                  (a) the expiration of its term;

                  (b) the vote of a Majority in Interest to dissolve the
Partnership;

                  (c) the Partnership being adjudicated insolvent or bankrupt;

                  (d) the Retirement, removal, or withdrawal of the Managing
General Partner;

                  (e) the death of Barry Silverstein; or

                  (f) the sale of all or substantially all of the Partnership's
Property.

                  (g) the complete withdrawal of the Limited Partners.

         37. Winding-Up and Distributions. Upon the dissolution of the
Partnership pursuant to section 36, and unless the Partnership is reconstituted,
the winding-up of the Partnership's business and the liquidation and
distribution of Partnership assets must be carried out with due diligence and in
a timely manner, and consistent with both the requirements of applicable law and
the following provisions of this section:


                                      -29-

<PAGE>   30



                  (a) The Managing General Partner shall be responsible for
taking all actions relating to the winding-up, liquidation, and distribution of
assets of the Partnership, unless its Retirement, removal, or withdrawal causes
the dissolution, in which case the fiscal agent, liquidator, or receiver
appointed (without judicial action) by a Majority in Interest shall be so
responsible. The Managing General Partner, or the appointed fiscal agent,
liquidator, or receiver, is referred to in this Agreement as the "Liquidator." A
Limited Partner can be appointed to be the Liquidator. The Liquidator shall file
all certificates or notices of the dissolution of the Partnership as required by
law. Upon the complete liquidation and distribution of the Partnership assets,
the Partnership shall terminate, and the Liquidator shall execute, acknowledge,
and cause to be filed all certificates and notices required by law to terminate
the Partnership.

                  (b) The Liquidator shall proceed without unnecessary delay to
sell and otherwise liquidate the Partnership's assets. Unless directed otherwise
by a Majority in Interest, all Marketable Securities, cash and other readily
divisible or fungible assets of the Partnership shall be distributed directly to
the Partners in the manner set forth in section 16(c)(i). The Liquidator shall
promptly sell the other assets of the Partnership unless it determines that an
immediate sale of part or all of such assets would cause undue loss to the
Partners. In such case, the Liquidator, to avoid such loss, may defer the
liquidation of the Partnership assets for a reasonable time, except for those
liquidations that are necessary to satisfy the debts and liabilities of the
Partnership to persons and parties other than the Partners. The Liquidator shall
distribute the proceeds from the liquidation of the Partnership's assets as
provided in section 16(c).

                  (c) Upon the dissolution of the Partnership pursuant to
section 36, and unless the Partnership is reconstituted, the Liquidator shall
cause the accountants for the Partnership to prepare within ninety (90) days
after the occurrence of the event of dissolution, and immediately thereafter
shall furnish to each Partner, a statement setting forth the assets and
liabilities of the Partnership as of the date of its dissolution. The
Liquidator, promptly following the complete liquidation and distribution of the
Partnership's assets, shall cause the Partnership's accountants to prepare, and
the Liquidator shall furnish to each person who is a Partner immediately before
the dissolution, a statement showing the manner in which the Partnership assets
were liquidated and distributed.

         38. Distribution of Liquidation Proceeds and Assets and Allocation of
Gains and Losses. Subject to the last sentence of 12(d), the net proceeds from
liquidation of the Partnership's assets and the unliquidated Property of the
Partnership shall be distributed, and all Profits and Losses resulting from the
liquidation of the Partnership shall be allocated, among the Partners in the
proportions and orders of priority specified in section 16(c).


                                      -30-

<PAGE>   31



         39. Limitation of Liability of Partners. Upon the dissolution of the
Partnership and the distribution of the net liquidation proceeds pursuant to
section 36 and section 16(c), each Partner shall look solely to the assets of
the Partnership for the payment of his unreturned Capital Contributions, and if
the Partnership's assets remaining after the payment or discharge of the debts
and liabilities of the Partnership are insufficient to pay the full amount of
the unreturned Capital Contributions of each Partner, the Partner shall have no
recourse or claim against any Partner or the Partnership with respect to its
unreturned Capital Contributions, except for claims for fraud, gross negligence,
or breach of fiduciary duty.

         40. Waiver of Right of Partition of Assets. Each Partner, and for his
heirs, successors, and assigns, waives his right to the partition of the assets
of the Partnership upon the dissolution and liquidation of the Partnership.


                                    ARTICLE X

                  ACCOUNTING YEAR, BOOKS, RECORDS, AND REPORTS

         41. Books and Records. In accordance with the Act, the Managing General
Partner shall maintain at the principal office of the Partnership a complete and
accurate set of books of records and accounts, in which it shall make full and
complete entries of all dealings or transactions relating to the Partnership's
business and where it shall keep all supporting documentation of transactions
with respect to the conduct of the Partnership's business. The Managing General
Partner may delegate responsibility to those persons as a Majority in Interest
and agree to compile and maintain all required information and prepare all
required materials provided for in this Agreement. Each Partner or his duly
authorized representative, upon five days' advance notice to the Managing
General Partner, may examine during normal business hours the books of the
Partnership and all other records and information concerning the operation of
the Partnership.

         42. Reports. If requested by a Partner at least 30 days prior to the
end of a quarter, within 60 days after the end of each fiscal quarter in each
fiscal year of the Partnership, the Managing General Partner shall cause to be
prepared and sent to each Partner a balance sheet, income statement and cash
flow statement of the Partnership for and as of the end of that fiscal quarter,
in each case unaudited but accompanied by a report of the activities of the
Partnership for that quarter. Within 90 days after the end of each fiscal year
of the Partnership, the Managing General Partner shall cause to be prepared and
sent to each Partner a financial report consisting of (a) a balance sheet as of
the end of the fiscal year; (b) statements of income, partner's equity, and
changes in financial position for the fiscal year; (c) if requested by a
Partner, the opinion of the Partnership's certified public accountant concerning
the foregoing financial statements; (d) a summary of the Partnership's
activities for the fiscal year;

                                      -31-

<PAGE>   32



(e) a statement showing the distributions to each Partner during the fiscal year
and identifying any distributions which constitute a return of Capital
Contribution; and (f) a statement showing the amount of Taxable Income or
Taxable Loss, and listing each item of income, gain, loss, deduction, or credit
allocated or charged against the Partner for federal and state income tax
purposes.

         43. Bank Accounts. The Managing General Partner shall maintain the bank
accounts of the Partnership in such financial institutions as the Managing
General Partner considers appropriate. The Managing General Partner shall make
or permit withdrawals from the Partnership's bank accounts on the signature of
the Managing General Partner.

         44. Tax Elections. If the Partnership has not made the election set
froth in Treas. Reg. ss. 1.761-2, or if Subchapter K of Chapter 1 of the Code
applies to the Partnership, the Partnership shall file an election under Section
754 of the Code, relating to the optional adjustment to the basis of partnership
property, at the first time it is permitted to do so after the beginning of the
term of this Partnership. The Managing General Partner shall make or waive, at
its discretion, all other tax elections required or permitted to be made by the
Partnership under the Code.

         45. Accounting Method and Fiscal Year. The Managing General Partner
shall maintain the Partnership records and books of accounts in accordance with
the cash method of accounting, with such modifications as are set forth in this
Agreement, and otherwise in accordance with generally accepted accounting
principles consistently applied. The fiscal year of the Partnership is the
calendar year.


                                   ARTICLE XI

                               GENERAL PROVISIONS

         46. Power of Attorney. Each Limited Partner (including each substitute
Limited Partner), by executing a counterpart of this Agreement, irrevocably
constitutes and appoints, with full power of substitution, the General Partner
as his true and lawful attorney-in-fact, with full power and authority in his
name, place and stead to make, execute, acknowledge, deliver, swear to, publish,
record and file:

                  (a) any certificate or other instrument that may be required
to be filed, published or recorded by the Partnership under the Act or any other
law of Delaware or that the Managing General Partner considers advisable to
file, publish or record;

                  (b) all documents (including schedules and amendments to this
Agreement) that may be required to effect the continuation or reinstatement of
the

                                      -32-

<PAGE>   33



Partnership, admit an additional or substitute Partner (other than any approval
required of Limited Partners), reduce the Capital Contributions of a Partner, or
dissolve and terminate the Partnership; and

                  (c) all amendments to this Agreement adopted in accordance
with section 54.

The foregoing power of attorney is coupled with an interest, resulting from each
Limited Partner's reliance on the power of the attorney-in-fact to act as
contemplated by this Agreement for the purposes described in this section 46.
The foregoing power of attorney shall survive the Retirement of a Limited
Partner and the Assignment by any Limited Partner of all or any part of his
Partnership Interest, except that when an assignee is granted Partnership Rights
and admitted as a substitute Limited Partner the power of Attorney of the
assignor Limited Partner shall survive the Assignment only for the purpose of
enabling the non-managing General Partner to make, execute, acknowledge,
deliver, swear to, publish, record and file every instrument necessary to effect
the substitution.

         47. Partnership Contracts. The Managing General Partner may enter into
agreements and contracts on behalf of the Partnership only if they are in
writing and clearly indicate to the other parties that the Partnership is a
general partnership of which the Managing General Partner is a general partner.

         48. Conveyances. Subject to section 20, the Managing General Partner
may sign any deed, mortgage, lease, bill of sale, security agreement, pledge,
contract or other instrument or commitment purporting to convey or encumber any
of the Partnership's Property or any interest therein, whether now or
subsequently owned or leased at any time by the Partnership, and no other
signature is required.

         49. Notices. To be effective, a notice required or permitted by this
Agreement must be in writing, or by telegram, telex or telecopy if promptly
confirmed in writing. A notice is given when delivered or, if mailed, when
deposited in a United States postal service letterbox to be sent by first-class,
postage-prepaid, certified mail, with return receipt requested (whether or not
the sender receives the return receipt), and addressed, if to a Partner, at his
registered address listed on EXHIBIT A and, if to the Managing General Partner
or the Partnership, to the attention of such Managing General Partner at the
Partnership's principal business office.

         50. Consents. Any consent required by this Agreement may be given as
follows:

                  (a) by a writing given by the consenting Partner and received
by the Managing General Partner or other appropriate recipient at or before the

                                      -33-

<PAGE>   34



occurrence of the action or other thing for which the consent was solicited,
unless the consent is nullified by:

                           (i) A writing from the consenting Partner that is
received by the Managing General Partner before the occurrence of the action or
other thing for which the consent was solicited; or

                           (ii) the negative vote by the consenting Partner at
any meeting called for the purpose of considering the action or other thing.

                  (b) by the affirmative vote of the consenting Partner at any
meeting called for the purpose of considering the action or other thing for
which the Partner's consent was solicited.

         51. Meetings. The Managing General Partner may call meetings of the
Partners for any purpose, at any, time. The Managing General Partner shall call
a meeting of the Partners within 30 days after he receives from a Majority in
Interest a written request for a meeting, stating the purpose of the requested
meeting and the matters proposed for consideration. Meetings of the Partners may
be held at such time, date and place as the Managing General Partner designates.
The Managing General Partner shall give notice of any meeting of the Partners
not less than ten nor more than 60 days before the date of the meeting, to each
Partner at his registered address listed on EXHIBIT A. The notice shall state
the time, date and place of the meeting, the purpose of the meeting and the
Partner at whose direction or request the meeting is called. Except in the case
of emergency, meetings of the Partnership shall be held in Delaware or South
Carolina. If a meeting is adjourned to another time or place, notice of the
adjourned meeting is not required if the time and place of the adjournment is
announced at the called meeting. The presence in person or by proxy of a
Majority in Interest constitutes a quorum at a meeting. Any notice of a meeting
required by this section may be waived in writing at, before or after the
meeting and shall be deemed to be waived by each Partner who is present in
person or by proxy at the meeting. Only those persons who are Partners at the
close of business on the day before the meeting are entitled to vote at the
meeting. Any Partner entitled to vote at a meeting may authorize any person to
act for him by written proxy if a copy of the proxy is delivered to the Managing
General Partner before the commencement of the meeting. To be effective, a proxy
must be signed by the Partner (and, if applicable, each co-owner) or his duly
appointed attorney-in-fact, and no proxy shall be valid for more than 11 months
after its date. A proxy is revocable at the pleasure of the Partner granting it.

         52. Binding Effect; Counterparts. The covenants and agreements
contained in this Agreement are binding on, and inure to the benefit of, the
legal and personal representatives, heirs, successors and permitted assignees of
the parties to this Agreement. The parties may execute this Agreement in any
number of counterparts,

                                      -34-

<PAGE>   35



each of which will be an original, but all of which together will constitute one
and the same agreement.

         53. Choice of Law. This Agreement and the rights and obligations of the
Partners under it are governed by, and construed and enforced in accordance
with, the laws of Delaware.

         54. Complete Agreement; Modification. This Agreement contains the
final, complete and exclusive expression of the understanding among the Partners
with respect to the Partnership and its purposes and objectives and supersedes
any prior or contemporaneous agreement or representation, oral or written, by
any of them. Except to admit a new or a substitute Partner or to reflect the
withdrawal or Retirement of a Partner, this Agreement and every provision of it
may be modified or amended only by an agreement in writing signed by or on
behalf of all Partners.

         55. Evidence of Partnership Interests. The Partnership Interest of each
Partner is evidenced exclusively by a counterpart of this Agreement (including
EXHIBIT A) that has been signed and dated by the Managing General Partner.

         56. Tax Matters Partner. The General Partner or its designee shall be
the "tax matters partner" of the Partnership for federal income tax purposes.
Pursuant to Section 6223(c)(2) of the Code, upon receipt of notice from the
Internal Revenue Service of the beginning of an administrative proceeding with
respect to the Partnership, the General Partner, as the tax matters partner,
shall furnish the Internal Revenue Service with the names, addresses, and
Percentage Interests of each of the Partners. The General Partner agrees not to
enter into a settlement agreement pursuant to Section 6224 of the Code without
providing at least 30 days advance written notice to each Partner. As tax
matters partner, the General Partner shall have absolute discretion regarding
whether to seek judicial review of any administrative determination and, if it
determines to seek judicial review of Internal Revenue Service action pursuant
to Section 6226 of the Code, then the General Partner shall select the judicial
forum for such review. The tax matters partner shall receive no compensation for
its services as such. The Partnership shall bear all third party costs and
expenses incurred by the tax matters partner in performing its duties as such.
Nothing herein shall be construed to restrict the Partnership from engaging an
accounting firm or law firm to assist the tax matters partner in discharging its
duties hereunder.

         57. Gender and Number. As used in this Agreement, the masculine gender
includes the feminine and neuter, and the singular includes the plural.

         58. Title. Title to any Property acquired by the Partnership shall be
taken in the name of the Partnership.



                                      -35-

<PAGE>   36



         IN WITNESS WHEREOF, this Agreement has been executed by or on behalf of
each Partner as of the date written beside his name.


GENERAL PARTNER:                            GENERAL PARTNER:
                                        
                                        
                                        
                                        
/s/ Carol Allison                           /s/ Steven Blechner
- ----------------------------------          ------------------------------------
Carol Allison                               Steven Blechner
From December 1, 1998 to                    Effective December 28, 1998
December 27, 1998                       
                                        
                                        
                                            LIMITED PARTNER:
                                        
                                        
                                        
                                        
                                            /s/ Barry Silverstein
                                            ------------------------------------
                                            Barry Silverstein
                                   




                                      -36-

<PAGE>   37


                                   EXHIBIT A

<TABLE>
<CAPTION>

                                                                                                 CLASS OF
                                                         CAPITAL            PERCENTAGE         PARTNERSHIP
                PARTNER                                CONTRIBUTION          INTEREST            INTEREST
- -----------------------------------------------------  ------------         ----------         -----------
<S>                                                    <C>                   <C>                <C>
Steven Blechner                                        $         10           0.00003%          B Only
40 Harvestwood Drive
West Bridgewater, MA 02379

Barry Silverstein                                      $ 36,950,146          99.99997%          A and B
5111 Ocean Boulevard
Suite C
Sarasota, FL 34242
                                                       ------------------------------
              TOTAL                                    $ 36,950,156            100.00%
                                                       ==============================
</TABLE>


                                      -37-
<PAGE>   38
                                  EXHIBIT A-1
                                        
                          Schedule of Class A Property

<TABLE>
<CAPTION>
<S>                                                              <C>
Steven Blechner
    Cash                                                         $        10
                                                                 -----------
Barry Silverstein:
     Accounts and general receivables from:
          Adirondack Life Inc.                                   $   788,833
          Bassett Mountain Recreation Centers, Inc.                9,391,963
          Classic Auto Corp.                                         371,537
          Debar Mountain Timber Corp.                                205,980
          Fluid Recycling of Connecticut                             312,193
          Fluid Recycling of Georgia                                 197,150
          Fluid Recycling of Ohio                                    399,853
          Fluid Recycling Services, Inc.                           1,797,770
          FRS Management                                           6,318,087
          Metrocomm, Inc.                                          2,748,970
          Paxton Communications, Inc.                                457,074
          Paxton Cable Television, Inc.                            1,698,668

     Promissory Notes:
          D. Stevens McVoy                                         1,621,000
          Dennis J. McGillicuddy                                     450,000
          William F. & M. Pauline Martin                             175,000
          Bassett Mountain Recreation Center, Inc.                 2,469,680

     Stocks:
          6,647 1/2 Shares of CCX, Inc.                            3,881,782
          50 Shares of Bassett Mountain Recreation Center, Inc.            1
          7,596 Shares of Certicom                                    83,275

     Lehman Brothers Brokerage Account: 
          Cash                                                        24,315
          U.S. Treasury Notes                                      1,161,362
          5,000 Shares of American Bankers Insurance Group, Inc.     226,875
          351,238 Shares of Travel Ports of America                1,009,809
</TABLE>

                                      -38-
     
<PAGE>   39



EXHIBIT A-1, CONTINUED:

List of Class A Property
<TABLE>
<CAPTION>
Jesup & Lamont Securities Corp. Brokerage Account:
        <S>                                           <C>
        Cash                                              137,221
        4,000 Shares of Creative Technology LTD-ORD        74,248
        70,000 Shares of Emcore Corp.                     875,000
        10,000 Shares of Neurocrine Biosciences, Inc.      72,500                                                   
                                                      -----------
  
        Total Barry Silverstein                       $36,950,146
                                                      -----------   
</TABLE>
                                                     

                                                                











  Shares held in the Lehman Brothers and Jesup & Lamont brokerage accounts are
  valued as of November 27, 1998, the date of the last valuation provided by
  the brokerage firms.


                                      -39-


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