EXHIBIT 10.19.1
 
                              EASTERN ENTERPRISES
 
               MASTER TRUST WITH KEY TRUST COMPANY OF OHIO, N.A.
 
                               TABLE OF CONTENTS
 

                                                                       
 Article I    Participation in the Trust...................................    2
 Article II   Powers and Duties of the Trustee.............................    3
 Article III  Valuation of the Funds.......................................    9
 Article IV   Additions to and Withdrawals from the Trust..................   10
 Article V    Accounts and Records.........................................   11
 Article VI   Compensation and Expenses of the Trustee.....................   11
 Article VII  Resignation, Removal and Substitution of Trustee.............   11
 Article VIII Amendment or Termination.....................................   12
 Article IX   General Provisions...........................................   12

 
                                       1

 
                              EASTERN ENTERPRISES
 
                               MASTER TRUST WITH
 
                        KEY TRUST COMPANY OF OHIO, N.A.
 
  This Trust Agreement ("Agreement") entered into as of the close of business
on April 28, 1995, by and between EASTERN ENTERPRISES, an unincorporated
voluntary association (commonly referred to as a Massachusetts business
trust), (the "Company") acting through its duly appointed Retirement Committee
(the "Committee") and KEY TRUST COMPANY OF OHIO, N.A., (the "Trustee") in
order to hold and invest the assets of certain employee benefit plans meeting
the requirements of Section 401 (a) of the Internal Revenue Code of 1986, as
amended, (the "Code") established by the Company and certain of its
subsidiaries and affiliates.
 
                                  Witnesseth:
 
  Whereas the Company has previously established a trust to hold the assets of
certain employee benefit plans established by the Company and its subsidiaries
and affiliates; and
 
  Whereas the Company wishes to amend, restate and continue in the form of
this Agreement, with a successor trustee, the agreement (the "Prior
Agreement") under which the aforesaid trust has been maintained; and
 
  Whereas the Company wishes to appoint Key Trust Company of Ohio, N.A. to act
as Trustee under this Agreement and Key Trust Company of Ohio, N.A. is willing
to accept said appointment;
 
  Now, Therefore, it is agreed that the Prior Agreement be amended and
restated effective as of the 1st day of July, 1995, as follows:
 
                                   ARTICLE I
 
                          Participation in the Trust
 
  1.1. The trust under this Agreement with Key Trust Company of Ohio, N.A. as
Trustee (the "Master Trust") is a continuation of a trust previously
established and maintained with The Bank of New York as trustee. Under the
Master Trust as herein continued, the Trustee shall receive, hold, administer,
invest and reinvest all assets transferred or contributed to it from time to
time with respect to those employee pension benefit plans meeting the
requirements set forth in Section 1.3 hereof which are described on Exhibit A
attached hereto and made a part hereof (collectively "Participating Plans" or
individually a "Participating Plan"). The Committee, which is a "named
fiduciary" as that term is defined in the Employee Retirement Income Security
Act of 1974 as the same has been and may hereafter be amended ("ERISA"), may
from time to time amend Exhibit A in writing, any such amendment to be treated
as incorporated in this Agreement upon delivery to the Trustee. Amounts
contributed or transferred to the Master Trust may include both employer and
employee contributions. The Trustee shall accept as contributions to the
Master Trust only cash or such other assets as are reasonably acceptable to
it. The assets so received together with all investments made with respect
thereto and proceeds thereof and all earnings and profits thereon, less
payments, transfers or other distributions shall be held, managed and
administered by the Trustee pursuant to the terms hereof without distinction
between principal and income, and may be held in a single fund or in two or
more Investment Funds (as defined in Section 2.2, below) in accordance with
Section 2.2. The Company or the Committee shall identify at the time any
transfer or contribution is made to this Master Trust the share of the
contribution or transferred amount that is allocable to each Participating
Plan; and if there are two or more Investment Funds, the portion of the
allocable share of each Participating Plan that is to be invested in each
Investment Fund.
 
  1.2. Except as hereinafter provided, the assets of each Participating Plan
allocated to any Investment Fund shall be commingled with the assets of other
Participating Plans allocated to such Investment Fund. However, the Trustee
shall maintain a separate account for each Participating Plan that will show
the share
 
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of such Participating Plan in the Master Trust and in each Investment Fund, in
accordance with Section 3.3. Prior to any segregation thereof, the share of
each Participating Plan in each Investment Fund shall be an undivided interest
in the assets of such Investment Fund, and the income gains and losses of each
Investment Fund shall be allocated proportionately among the shares therein of
each Participating Plan, unless the Committee shall direct in writing that a
special sub-fund or sub-funds be created within an Investment Fund to hold
assets allocable solely to a particular Participating Plan. If any such sub-
fund is created, income, and gains and losses with respect to the assets held
in such sub-fund shall be allocated solely to the share of such Participating
Plan. Except as may otherwise be permitted by ERISA and the provisions of the
Code applicable to qualified plans and trusts (including rulings and
regulations thereunder), (i) at no time prior to the satisfaction of all
liabilities of a Participating Plan with respect to participants in such plan
and their beneficiaries entitled to benefits thereunder shall any part of the
share of such Participating Plan in the Master Trust be used for or diverted to
any purpose other than the exclusive benefit of such participants and their
beneficiaries, and defraying reasonable expenses of administering such
Participating Plan and the Master Trust, (ii) such share shall not be
assignable in whole or in part by a Participating Plan or by any person,
natural or legal, having a beneficial interest in a Participating Plan, except
in a reversion otherwise permitted by law upon the termination of such
Participating Plan and the satisfaction of all liabilities thereunder.
Notwithstanding (i) and (ii) above, nothing herein shall prohibit the return of
contributions made by reason of a mistake of fact, or conditioned on initial
qualification of a Participating Plan that does not so qualify, or conditioned
on deductibility where the deduction is disallowed. The Master Trust shall, to
the extent of the share of each Participating Plan, be a part of such Plan.
 
  1.3. An employee pension benefit plan shall be eligible to become a
Participating Plan hereunder only if all of the following requirements are met:
 
    (a) such plan is established and/or maintained by the Company or a
  subsidiary or affiliate thereof;
 
    (b) the Master Trust established hereunder has been duly adopted as a
  trust under such plan;
 
    (c) such plan and this Master Trust constitute a qualified plan and trust
  under Section 401 (a) of the Code, exempt from federal income taxation
  under Section 501 (a) of the Code; and
 
    (d) such plan is permitted to commingle its assets with assets of other
  such qualified plans through the medium of this Master Trust so long as
  this Master Trust is such a qualified and exempt trust.
 
  1.4. An eligible plan may, with the consent of the Company or the Committee,
become a Participating Plan by the acquisition of an undivided interest in the
Master Trust or one or more of the Investment Funds maintained hereunder. A
plan shall cease to be a Participating Plan upon withdrawal of all its interest
in the Master Trust. Any company whose Participating Plan adopts and accepts
this Agreement shall be deemed thereby to appoint the Company or the Committee
its exclusive agent to exercise on its behalf all of the powers and authority
conferred upon the Company or the Committee by the terms of this Agreement
including, but not limited to, the power to amend this Agreement and to
terminate the trust created hereunder. The authority of the Company and the
Committee to act as such agent shall continue with respect to all funds
contributed by each Participating Plan and the income therefrom until and
unless the amount of such funds and income has been distributed by the Trustee
as hereinafter provided.
 
  1.5. In the event of a conflict between the provisions of the Master Trust
and a Participating Plan, the provisions of the Master Trust shall control.
 
                                   ARTICLE II
 
                        Powers and Duties of the Trustee
 
  2.1. The Trustee shall have only those responsibilities specifically imposed
upon it by the provisions of this Agreement and neither any Participating Plan
nor any other instrument to which the Trustee is not
 
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a party, including but not limited to any agreement entered into between the
Committee and an Investment Manager appointed pursuant to Section 2.2(b)
below, shall impose any duties or obligations upon the Trustee with respect to
the Master Trust without the Trustee's written consent.
 
  The Trustee shall discharge its duties under this Agreement solely in the
interest of Participating Plan participants and beneficiaries and with the
care, skill, prudence and diligence under the circumstances then prevailing
that a prudent man acting in a like capacity and familiar with such matters
would use in the conduct of an enterprise of like character and with like
aims.
 
  The Trustee shall have the following powers and duties, which shall be
exercised by the Trustee in its sole discretion free from limitations imposed
by any state law on investments of trust funds, except as otherwise provided
in this Article II:
 
    (a) The Trustee may sell, write options on, lease for any term or terms
  (with or without option to purchase), transfer or exchange all or any part
  of the property held by it in the Master Trust and all property that may
  from time to time be substituted therefor or added thereto, at such prices
  and upon such terms and conditions and in such manner as it shall deem
  advisable.
 
    (b) The Trustee shall invest and reinvest all or such part of the Master
  Trust as it shall deem advisable in such notes, debentures, bonds, stocks,
  limited partnership interests, trust certificates and other securities or
  options thereon, including stocks and other securities issued by the
  Company or any subsidiary or affiliate thereof (all of which are herein
  called "securities"), loans, time and savings deposits (including savings
  deposits and certificates of deposit in Society National Bank or its
  affiliates if such deposits bear a reasonable rate of interest), commercial
  paper (including participation in pooled commercial paper accounts),
  annuity and insurance contracts (including, but not limited to, retirement
  income contracts or contracts of the deposit administration type or for the
  accumulation of interest), real estate, real estate mortgages and other
  kinds of property of every kind and description, as the Trustee may deem
  proper and suitable. The Trustee may invest in units of The Society
  National Bank Multiple Investment Trust for Employee Benefit Trusts or the
  Society National Bank EB Managed Guaranteed Investment Contract Fund or in
  units of any other group or common trust fund heretofore or hereafter
  created and administered by the Trustee, its affiliates, any Investment
  Manager appointed hereunder or another fiduciary hereunder (provided such
  other fiduciary qualifies as an investment manager under Section 3(38) of
  ERISA), irrespective of the proportion of the Master Trust represented by
  any such investment, the provisions of any Participating Plan or any
  delegation of authority resulting therefrom; provided, however, that any
  such collective trust fund shall have been determined by the Internal
  Revenue Service to be a "pooled fund arrangement" as described in Revenue
  Ruling 81-100. As long as the Trustee holds any group or common trust fund
  units hereunder, the instruments establishing such common trust fund
  (including all amendments thereto) shall be deemed to have been adopted and
  made a part of this Master Trust, and each Participating Plan.
 
    (c) The Trustee may (i) exercise any exchange privileges, conversion
  privileges and/or subscription rights available in connection with any
  property at any time held by it; (ii) consent to, or dissent from, the
  reorganization, consolidation, merger or readjustment of the finances of,
  or the sale, mortgage, pledge or lease of the property of, any corporation,
  company or organization, any of the securities of which may at any time be
  held by it; (iii) deposit any property held hereunder with any protective,
  reorganization or similar committee and delegate discretionary power
  thereto; and (iv) do any act with reference to the matters in this
  paragraph, including but not limited to the exercise of options, making of
  agreements or subscriptions and the payment of expenses, assessments or
  subscriptions, which the Trustee may deem necessary or advisable in
  connection therewith.
 
    (d) The Trustee may retain for such time as it may deem advisable any
  property acquired by it pursuant to the preceding paragraph or transferred
  to it by a Participating Plan, whether or not such property would normally
  be purchased as an investment hereunder.
 
    (e) The Trustee may vote any stock or other securities and exercise any
  right appurtenant to any stock, other securities or other property held
  hereunder, either in person or by general or limited proxy, power of
  attorney or other instrument.
 
 
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    (f) The Trustee may hold securities in bearer form and may register
  securities and other property held in the Master Trust in its own name or
  in the name of a nominee, combine certificates representing securities with
  certificates of the same issue held by the Trustee in other fiduciary
  capacities, and deposit, or arrange for deposit of property with any
  depository but the books and records of the Trustee shall at all times show
  that all such securities are part of the Master Trust.
 
    (g) The Trustee may manage, operate, repair and improve any real or
  personal property held by it in the Master Trust.
 
    (h) The Trustee may (i) renew or extend or participate in the renewal or
  extension of any debt owing to the Master Trust, upon such terms as it may
  deem advisable, and agree to a reduction in the rate of interest on any
  such debt or to any other modification or change in the terms of any
  mortgage or of any guarantee pertaining thereto, in such manner and to such
  extent as it may deem advisable for the protection of the Master Trust or
  the preservation of the value of the investment; (ii) waive any default
  whether in the performance of any covenant or condition of any evidence of
  such indebtedness or mortgage or the performance of any guarantee or
  enforce any rights available to the Trustee by reason of any such default
  in such manner and to such extent as it may deem advisable; (iii) exercise
  and enforce any and all rights of foreclosure, bid in property at
  foreclosure, take a deed in lieu of foreclosure with or without paying a
  consideration therefor and in connection therewith release the obligation
  on any note or other evidence of indebtedness secured by such mortgage; and
  (iv) exercise and enforce in any action, suit or proceeding at law or in
  equity any rights or remedies in respect to any such debt, mortgage or
  guarantee.
 
    (i) The Trustee may hold in its or its affiliates banking department
  uninvested and unproductive of income, without liability for interest
  thereon, except such as may be allowed in accordance with its regulations,
  such part of the Master Trust as is reasonable under the circumstances.
 
    (j) The Trustee may settle, compromise or submit to arbitration any
  claims, debts or damages due to or owing from the Master Trust, commence,
  and defend suits or legal proceedings, and act, in its capacity as Trustee,
  as the named party in all suits or legal proceedings brought by or against
  the Master Trust.
 
    (k) The Trustee may make, execute and deliver, as Trustee, with or
  without a provision for no individual liability on its part, any and all
  conveyances, notes, contracts, waivers, releases, leases, assignments,
  mortgages, options, powers of attorney or other instruments in writing that
  the Trustee may deem necessary or advisable in administering the Master
  Trust.
 
    (l) The Trustee may employ suitable agents and counsel (who may be
  counsel for the Company or a subsidiary or affiliate thereof) and pay their
  reasonable compensation and expenses.
 
    (m) The Trustee may, with the prior written authorization of the
  Committee, lend any securities held in the Master Trust (including any
  Investment Fund created pursuant to Section 2.2 if the Investment Manager
  has consented) to broker-dealer(s) or bank(s), and in connection therewith
  enter into any securities loan agreement(s), be entitled to receive a
  reasonable fee as it and the Committee may agree, to deliver to any such
  broker-dealer(s), or bank(s), such securities and to permit the loaned
  securities to be transferred into the name of and voted by the borrower or
  others.
 
    (n) The Trustee may form or join with others in the formation of such
  corporations as shall be deemed advisable in connection with the
  administration or distribution of the assets of this Master Trust and
  transfer to any such corporation such property as the Trustee shall in its
  discretion deem advisable.
 
    (o) The Trustee may transfer such portion of the Master Trust as the
  Committee shall direct to any insurance company for one or more policies,
  annuity or other contracts, whether or not they are group contracts,
  including contracts which provide for the allocation of amounts thereunder
  to the insurance company's general account and/or to one or more of its
  separate accounts maintained for the collective investment of assets of
  qualified retirement plans.
 
    (p) Without limitation of the foregoing, the Trustee may do all such
  acts, execute all such instruments, undertake all such proceedings and
  exercise all such rights, powers and privileges in
 
                                       5

 
  relation to any assets constituting a part of the Master Trust, as it may
  deem necessary or advisable to carry out the purposes of this Agreement.
 
  2.2. The Committee shall have the following powers and responsibilities with
respect to the assets held in the Master Trust.
 
    (a) The Committee may direct the Trustee from time to time to divide and
  redivide the assets held in the Master Trust into two or more funds
  ("Investment Funds"), which Investment Funds shall bear such designation as
  the Committee shall determine. At the time of the first division and of
  each redivision, the Committee may specify the part of the assets held in
  the Master Trust to be allocated to each Investment Fund, and the Committee
  may reallocate all or any part of such assets between or among the
  Investment Funds from time to time.
 
    (b) From time to time the Committee may designate an Investment Manager,
  who shall be (i) registered as an Investment Adviser under the Investment
  Advisers Act of 1940, (ii) a bank, as defined in that Act, or (iii) an
  insurance company qualified to perform investment services under the laws
  of more than one State of the United States, and who acknowledges in
  writing to the Company and the Trustee that it is a fiduciary with respect
  to the assets of the Master Trust under such Investment Manager's control
  with authority to direct the investment and reinvestment of an Investment
  Fund or Funds specified in such notice and with such additional authority
  as may be specified therein. The Investment Manager shall not be the agent
  of the Trustee. The Committee may by similar notice modify or terminate
  such designation and authority from time to time. So long as, and to the
  extent that, any such designation is in effect, the Trustee (i) shall
  invest, reinvest and retain the Investment Fund assigned to an Investment
  Manager in accordance with the instructions received from such Investment
  Manager, and (ii) with respect to assets in such Investment Fund shall
  follow any instructions received by it from such Investment Manager as to
  the exercise by the Trustee of its powers under subsections (a) through (e)
  of Section 2.1 of this Article II. So long as, and to the extent that, no
  such designation is in effect, the Trustee shall invest, reinvest and
  retain, in accordance with its own discretion, subject to subsection (c) of
  this Section 2.2, that part of the Master Trust not assigned to an
  Investment Manager.
 
    (c) The Committee may designate itself as the fiduciary responsible for
  and having the authority to direct the investment and reinvestment of an
  Investment Fund and to exercise with respect thereto the powers granted to
  an Investment Manager. In the case of any such designation the Committee
  shall be treated (with respect to its investment responsibilities and
  authority) as an Investment Manager for purposes of this Agreement.
 
    (d) The Committee may designate an Investment Fund as a special purpose
  or limited purpose fund that is to be managed (whether by the Committee,
  the Trustee or an Investment Manager) in accordance with special objectives
  or limitations or investment practices (such as, but not limited to,
  approximating the results of a designated market index).
 
  2.3. When Investment Funds have been established pursuant to Section 2.2:
 
    (a) The Committee shall regularly notify each designated Investment
  Manager of the anticipated cash requirements for disbursements from the
  Investment Fund or Funds under its direction, and the Investment Manager
  shall direct the Trustee to hold cash funds uninvested in such amounts and
  for such periods of time as may appear to be reasonably necessary to meet
  such cash requirements. Notwithstanding the appointment of an Investment
  Manager the Trustee is authorized in its discretion to invest and reinvest
  the cash forming a part of any Investment Fund, which it has not been
  directed to hold uninvested or as to which specific investment directions
  have not otherwise been received, in such certificates of deposit of
  Society National Bank, variable demand notes, corporate money market
  instruments such as commercial paper and U.S. Treasury bills and notes,
  repurchase agreements or other evidences of indebtedness which are payable
  on demand or which generally have a maturity date of not more than fifteen
  (15) months from the time of acquisition and including units of any common
  trust fund holding any such investments administered by the Trustee, as the
  Trustee in its sole discretion deems suitable for the account. The Trustee
  is subject to the fiduciary
 
                                       6

 
  responsibility provisions of ERISA with respect to, but does not guarantee,
  any such obligation, deposit, note, or other investment made by it from
  loss, depreciation, or diminution in value.
 
    (b) The Investment Manager shall place the buy or sell orders pertaining
  to the investments which are subject to the direction of the Investment
  Manager with the brokers, or other persons through whom such transactions
  shall be accomplished. The Trustee's sole duty and obligation relating to
  investments which are subject to the direction of the Investment Manager
  shall be to accept and pay for any property of any nature whatsoever that
  it may be directed by the Investment Manager to accept and pay for, and to
  deliver against payment therefor, any property of any nature whatsoever
  which it may be directed by such Investment Manager to deliver against
  payment therefor. The Trustee shall use its best efforts to consummate any
  such acceptance and payment, or delivery against payment, as it may be
  directed so to do, and this shall constitute the Trustee's sole duty with
  respect to such trading.
 
    (c) Payment of the costs of the acquisition, sale or exchange of any
  security or other property for an Investment Fund shall be charged to such
  Investment Fund. In the absence of a direction from the Committee to the
  contrary, other payments and disbursements from the Master Trust shall be
  charged to such part of the Master Trust as the Trustee deems advisable.
 
    (d) All instructions from an Investment Manager (or from persons
  authorized by an Investment Manager) to the Trustee shall be in writing and
  shall be complete in all reasonable and necessary details. The Trustee may,
  in its discretion, accept directions by telephone or telegraph confined in
  writing or by any other means of communication which it believes to be
  genuine (including communications received through the facilities of an
  institutional delivery system of a depository) provided that the Trustee
  shall not be liable for executing or failing to execute any such directions
  or for any mistake in the execution of any such instruction, nor shall the
  Trustee have any duty to question such instructions or incur liability for
  following such instructions, except in each case for liability arising out
  of its negligence or willful default.
 
    (e) In the event that an Investment Manager appointed hereunder is
  authorized and empowered by the Committee to invest and reinvest all or any
  part of the Master Trust allocated to its Investment Fund in units of any
  common, collective or commingled trust fund maintained by said Investment
  Manager, as a qualified trust under the provisions of Section 401(a) and
  exempt under the provisions of Section 501(a) of the Code then,
  notwithstanding any provision in this Agreement expressed or implied to the
  contrary, upon direction of the Investment Manager, the Trustee shall make
  such transfers to the Investment Manager, as trustee of a common,
  collective or commingled trust fund described above, as are necessary to
  implement the foregoing.
 
    (f) Notwithstanding the provisions of this Agreement which place
  restrictions upon the actions of the Trustee, or the Investment Manager, to
  the extent monies or other assets are utilized to acquire units of any
  collective or group trust, the terms of the common, collective or group
  trust indenture shall solely govern the investment duties, responsibilities
  and powers of the trustee of such common, collective or group trust, and to
  the extent required by law, such terms, responsibilities and powers shall
  be incorporated herein by reference and shall be part of this Agreement.
  The Trustee shall have no duty or responsibility as to the safekeeping of
  such assets or as to the investment and reinvestment of the same, except
  that the Trustee shall require such statements and reports from such
  Investment Manager as may be necessary to enable the Trustee to carry out
  its recordkeeping and reporting duties under this Agreement. The Trustee
  shall enter into and execute such agreements, receipts and releases as
  shall be required to carry out the directions of the Committee with respect
  to the transfer of any assets of the Master Trust to or from an Investment
  Manager.
 
    (g) To the extent that provisions of Sections 2.2 and 2.3 are
  inconsistent with other provisions of Article II hereof, the provisions of
  Sections 2.2 and 2.3 shall be controlling.
 
  2.4 Income received by the Master Trust shall be added periodically to the
principal of the Master Trust, by the Trustee. The profits and losses of the
Master Trust shall be allocated to the principal of the Master Trust.
 
 
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  2.5. Notwithstanding anything herein to the contrary, the Trustee may enter
into a transaction or retain a trust investment which may, or in fact does,
give rise to unrelated business taxable income either through the exercise of
the Trustee's sole investment authority hereunder or pursuant to the
directions of the Committee or an Investment Manager.
 
  2.6. No person dealing with the Master Trust or the Trustee shall be
required to inquire as to the authority of the Trustee to do any act or to see
to the application of funds or other property paid or delivered to or upon the
order of the Trustee, and any issuing insurance company may treat as binding
and conclusive upon it any action which the Trustee may take with respect to
any annuity or insurance contract held by the Trustee.
 
  2.7. Neither the Trustee nor the Committee (except insofar as it shall act
as an Investment Manager) shall be responsible for the investment of any part
of the Master Trust allocated to an Investment Manager. Except as required by
ERISA, the Trustee shall be under no duty to question or make inquiry as to
any direction, notification or order or failure to give a direction,
notification or order by the Committee or an Investment Manager and shall be
under no duty to make any review of investments acquired for an Investment
Fund managed by the Committee or an Investment Manager and under no duty at
any time to make any recommendation with respect to disposing of or continuing
to retain any such investments.
 
  The Company hereby indemnifies and holds the Trustee or its nominee harmless
from any and all actions, claims, demands, liabilities, losses, damages or
reasonable expenses of whatsoever kind and nature in connection with or
arising out of (1) any action taken or omitted in good faith, or any
investment or disbursement of any part of the Master Trust made by the
Trustee, in accordance with the directions of the Committee or any inaction
with respect to any Committee managed Investment Fund or with respect to any
investment previously made at the direction of the Committee in the absence of
directions from the Committee therefor, or (2) any action taken or omitted in
good faith by the Trustee with respect to an Investment Fund managed by an
Investment Manager in accordance with any direction of the Investment Manager
or any inaction with respect to any such Investment Fund in the absence of
directions from the Investment Manager, or (3) any action taken in good faith
by the Trustee pursuant to a notification of an order to purchase or sell
securities issued by an Investment Manager or the Committee directly to a
broker or a dealer, or (4) any failure by the Trustee to pay for any property
purchased by an Investment Manager for the Master Trust by reason of the
insufficiency of funds in the Master Trust; provided, that nothing in this
paragraph shall be deemed to indemnify or hold harmless the Trustee or its
nominee with respect to, or relieve the Trustee or its nominee from, liability
arising out of its misfeasance or negligence.
 
  Anything hereinabove to the contrary notwithstanding, the Company shall have
no responsibility to the Trustee or its nominee under the foregoing
indemnification if the Trustee or such nominee knowingly participated in or
knowingly concealed any act or omission of the Committee or any Investment
Manager knowing that such act or omission constituted a breach of fiduciary
responsibility, or if the Trustee or such nominee fails to perform any of the
duties undertaken by it under the provisions of this Agreement, or if the
Trustee or such nominee fails to act in conformity with the directions of an
authorized representative of the Investment Manager or the Committee;
provided, however, that if the Trustee or a nominee has knowledge of a breach
committed by an Investment Manager, the sole responsibility of the Trustee or
such nominee, except as otherwise provided in ERISA, shall be to notify the
Company in writing thereof and the Company shall thereafter assume full
responsibility to all persons interested in the Master Trust to remedy said
breach.
 
  2.8. No allocation or delegation by the Company or the Committee of any of
their respective powers, authorities, or responsibilities hereunder to the
Trustee shall become effective unless such allocation or delegation is
specifically set forth in this Agreement or shall first be accepted by the
Trustee in a writing signed by it and delivered to the Company or the
Committee as the case may be.
 
  2.9. The Committee shall provide the Trustee with copies of the plan
documents for all Participating Plans and all agreements with all Investment
Managers appointed by the Committee and all other documents amending or
supplementing such documents and agreements and the Trustee shall be
 
                                       8

 
entitled to rely upon the Committee's attention to that obligation and shall be
under no duty to inquire of the Committee as to the existence of any such
documents and agreements not provided by the Committee hereunder.
 
                                  ARTICLE III
 
                             Valuation of the Funds
 
  3.1. Fair Market Value Determination. Subject to Section 3.2 below, the
assets of each Participating Plan, Investment Fund and the total assets of the
Master Trust shall be valued by the Trustee, for the purpose of establishing
the fair market value thereof, as of the last business day of each calendar
month or such other date or dates as may be agreed upon by the Company or
Committee and the Trustee (hereinafter referred to as a "Valuation Date") in
accordance with the following procedure:
 
    (a) All securities and other property held therein shall be valued at
  fair market value or, if the market value is not readily ascertainable,
  shall be valued at such amount as shall be deemed by the Trustee to
  represent the fair market value thereof.
 
    (b) An asset purchased but not paid for shall not be included for
  valuation purposes as an asset held until paid for and delivered to the
  Trustee, provided the Trustee may in its discretion include such an asset
  for valuation purposes as though the asset was paid for and delivered.
 
    (c) An asset sold but not delivered shall be included for valuation
  purposes as an investment held until delivered to the purchaser and the
  proceeds received, provided the Trustee may in its discretion exclude such
  an asset for valuation purposes as though the asset was delivered to the
  purchaser and the proceeds received.
 
    (d) To the value thus determined there shall be added (i) interest
  accrued but not collected on any interest bearing obligation and dividends
  declared but not collected on stock, which, if sold, would be sold ex-
  dividend, (ii) the uninvested cash balance held therein.
 
    (e) From the aggregate value so obtained there shall be deducted all
  accrued charges and expenses and any reserve for contingencies or
  unliquidated liabilities which are appropriate under sound accounting
  principles.
 
  3.2. Valuation of Investments Directed or Made by the Committee or Investment
Managers. Notwithstanding anything herein to the contrary, with respect to any
asset acquired by or at the direction of the Committee or an Investment
Manager, the Trustee will only be responsible for valuing such asset if the
asset is publicly traded or reported on a pricing service to which the Trustee
subscribes. The Committee or, if so designated by the Committee, the Investment
Manager, will be responsible for valuing all other assets so acquired for all
purposes of the Master Trust.
 
  3.3. Allocation to Participating Plans. Subject to Sections 1.1 and 1.2,
above, the Trustee shall maintain a separate bookkeeping account
("Participating Plan Account") reflecting the share in the Master Trust of each
Participating Plan. As of each Valuation Date, the Trustee shall adjust each
Participating Plan Account to appropriately reflect the fair market value
thereof and the net cost thereof and in making such adjustments shall
specifically take into account the following factors properly attributable to
such monthly period in accordance with generally accepted accounting
principles: (a) benefits paid from each Participating Plan; (b) costs and
expenses allocable thereto; (c) realized gains and losses allocable thereto;
(d) income (whether received or accrued) allocable thereto; and (e)
contributions to each such Participating Plan. If the share of a Participating
Plan is invested in more than one Investment Fund, separate sub- accounts shall
be maintained in a similar manner to reflect the share of the Participating
Plan in each such Investment Fund.
 
 
                                       9

 
                                  ARTICLE IV
 
                  Additions to and Withdrawals from the Trust
 
  4.1. Additions to and withdrawals from the Master Trust shall be deemed to
be made and shall be accounted for as though being made only as of a Valuation
Date, and only upon the basis of the value on such date. The Committee shall
have the right from time to time to direct the Trustee to accept additions to
or make withdrawals from the Master Trust.
 
  4.2. The Trustee shall make such payments from the Master Trust at such time
or times and to such person or persons, trusts, corporations or other
organizations as the Committee shall direct in writing, including (a) direct
payments to a participant in a Participating Plan or the beneficiary of such a
participant, (b) payment to an insurance company to purchase an annuity
contract for such a participant or beneficiary, (c) payment to a trustee of a
trust maintained as part of another plan (or to the issuer of an annuity
contract that is part of such a plan) for the benefit of such a participant or
beneficiary and (d) payments of administrative expenses of a Participating
Plan; provided however, that (i) such written directions shall designate the
Participating Plan from which each payment is made and the Trustee shall
charge the payment to the Participating Plan Account of such Participating
Plan and (ii) no payment from a Participating Plan shall exceed the share in
the Master Trust of such Participating Plan on the date such payment is made.
Any amount so paid or delivered to a paying agent shall be held in trust by
such paying agent until disbursed in accordance with the Participating Plan
with respect to which the payment or distribution is made.
 
  4.3. Upon written direction from the Committee, the Trustee shall segregate,
transfer and deliver such part of the share of a Participating Plan in the
Master Trust as may be specified in such direction to any other tax-qualified
trust established as part of the Participating Plan for the purpose of funding
benefits thereunder, or, if the Committee shall so direct, shall hold such
segregated share, in trust, as a separate trust governed by the same
provisions as the terms of this Agreement, as if such Participating Plan (a
"Segregated Plan") were the sole Participating Plan thereunder, or if there is
more than one Segregated Plan, as if such Segregated Plans as the Committee
shall so direct were the sole Participating Plans thereunder, except that if
an entity other than the Company has adopted a Segregated Plan or Plans as the
sponsoring employer in lieu of the Company, and has also adopted such separate
trust as part of the Segregated Plan or Plans, such adopting entity shall
thereafter be deemed to be "the Company" under the provisions of such separate
trust. The adoption of any Segregated Plan or Plans and of any such separate
trust by an entity other than the Company shall be evidenced by a written
instrument signed by such entity and delivered to the Trustee.
 
  4.4. If a Participating Plan shall cease to meet any of the requirements for
participation set forth in Article I hereof, the entire interest of such
Participating Plan in the Master Trust shall be paid out to the trust
described in Section 4.3 as of the Valuation Date next succeeding the date of
the Trustee's receipt of notice of that fact, whether or not any notice of
intention to withdraw such interest shall have been given.
 
  4.5. In the event that it shall become necessary to make a physical
segregation of the assets of the Master Trust allocable to any Participating
Plan Account, there shall be set apart to such Participating Plan Account from
the Master Trust such assets as the Trustee shall determine, with the approval
of the Committee, having a then fair market value equal to the fair market
value credited to the Participating Plan Account as of the Valuation Date with
respect to which such segregation is made. If the Committee approves a
distribution in any form other than cash or directs such a distribution under
Section 4.2 or Section 4.3, then the Company shall undertake to discharge any
responsibility which may be imposed under any Participating Plan or by
applicable law to ensure compliance with any Federal or State securities laws,
requirements or restrictions in connection therewith.
 
 
                                      10

 
                                   ARTICLE V
 
                             Accounts and Records
 
  5.1. The Trustee shall keep accurate and detailed accounts and records of
all investments, receipts, disbursement and other transactions involving the
Master Trust as the Committee and the Trustee shall agree upon, and all such
accounts and records shall be open to inspection at any reasonable time by any
person designated by the Committee. Within forty-five (45) days following the
close of each calendar year and at such other times as may be required by the
Committee the Trustee shall render an account to the Committee, setting forth
all receipts, disbursements and other transactions effected by it during such
year, together with an inventory of all investments held in the Master Trust
at the end of the year.
 
  5.2. The Trustee from time to time may, but shall not be required to, settle
its account by delivering to the Committee one or more copies of a written
account setting forth in detail all the transactions of the Master Trust
during any preceding period for which an account has not theretofore been
filed pursuant to this Section. The Committee may approve any such account by
written notice of approval delivered to the Trustee, and shall be deemed to
have approved any such account by failure to express objection thereto in a
writing delivered to the Trustee within sixty days following the due date
(including extensions provided by law) for the filing of the Annual
Return/Report for each Participating Plan with respect to the latest period
covered by any such account. In the event of such written approval, or
approval by such failure to object, such account shall be final and the
Trustee shall be forever released and discharged as to the Company with
respect to all errors, if any, as may be set forth in such account as though
such account had been settled by the decree of a court of competent
jurisdiction unless such errors were caused by the Trustee's own bad faith,
fraud, or willful misconduct.
 
                                  ARTICLE VI
 
                   Compensation and Expenses of the Trustee
 
  6.1. The Trustee shall be entitled to receive reasonable fees for its
services hereunder in accordance with the schedule of fees attached hereto and
incorporated herein as Exhibit B (which Exhibit may be amended prospectively
at any time upon ninety (90) days prior written notice to the Committee) and
shall be entitled to receive reimbursement for all reasonable expenses
incurred by it in the administration of this Agreement. Unless paid directly
by the Company, any proper charges and disbursements incurred by the Trustee
in the performance of its duties hereunder, including fees for legal services
rendered to the Trustee whether during or after the time it is acting
hereunder, shall be paid from the Master Trust. All taxes of any and all kinds
whatsoever that may be levied or assessed under existing or future laws upon
or in respect of the Master Trust or the income thereof shall be a charge
against the Master Trust; provided, however, in the event that the Company
shall notify the Trustee that, in the opinion of its counsel, any such taxes
are unlawfully or excessively assessed or threatened to be assessed, the
Trustee shall, at the expense of the Company, join with the Company to contest
the validity of such assessment in any manner deemed appropriate by the
Company or its counsel.
 
                                  ARTICLE VII
 
               Resignation, Removal and Substitution of Trustee
 
  7.1. The Trustee at the time acting hereunder may resign and be discharged
from the Master Trust created hereby by giving sixty (60) days' notice in
writing to the Company, unless the Company shall accept as adequate a shorter
notice. Any Trustee hereunder may be removed by the Company at any time with
or without cause upon sixty (60) days' written notice, unless the Trustee
shall accept as adequate a shorter notice. Such resignation or removal, as the
case may be, shall take effect at such time as a successor Trustee shall have
been appointed and shall have accepted such appointment, as hereinafter
provided. Any Trustee so resigning or removed shall make no surrender charge
with respect thereto.
 
 
                                      11

 
  7.2. In the case of the resignation or removal of the Trustee or in case a
vacancy shall arise in the trusteeship from any cause, a successor Trustee
shall be appointed by the Board of Trustees of the Company, and an instrument
in writing advising of such appointment shall be delivered to the successor
Trustee so appointed and to the Trustee ceasing to act if it be in existence.
 
  7.3. Any successor Trustee appointed hereunder shall execute, acknowledge and
deliver to the Company and the Trustee an instrument in writing accepting such
appointment, and thereupon n such successor Trustee, without any further act,
deed or conveyance, shall become vested with all of the estates, properties,
rights, powers and duties of its predecessor in the Master Trust hereunder with
like effect as if originally named as Trustee herein; but nevertheless, on the
written request of the Company or of the successor Trustee, the Trustee ceasing
to act shall execute and deliver any instrument transferring to such successor
Trustee, upon the Trusts herein expressed, all of its estates, properties,
rights and powers hereunder, and shall duly assign, transfer and deliver the
property held in the Master Trust to such successor Trustee. No successor
Trustee shall have any duty or obligation to inquire into the administration of
the Trust hereunder by any prior Trustee nor be responsible for any act or
failure to act of any prior Trustee.
 
                                  ARTICLE VIII
 
                            Amendment or Termination
 
  8.1. Subject to the limitations set forth in Section 1.2 of Article I hereof,
the Company has reserved, and does hereby reserve, the right at any time, (a)
to terminate this Master Trust and any trust created hereby, in whole or in
part, or (b) to amend this Agreement and any trust created hereby in any
respect. Any such termination or amendment shall be expressed in an instrument
executed by the Company and, in the case of an amendment, by the Trustee. Such
instrument shall become effective as of the date designated in such instrument
or, if no such date is designated, upon the date of the execution of such
instrument. If the Trustee is unable or unwilling to execute any such
amendment, it may resign or be removed by the Company as above provided. No
amendment to this Agreement shall affect the Trustee's rights, duties or
responsibilities unless the Trustee consents thereto in writing.
 
                                   ARTICLE IX
 
                               General Provisions
 
  9.1. Except as otherwise provided in a Participating Plan or in Section 1.2
of Article I hereof, no interest or expectancy of the Participating Plans or
any participant or beneficiary thereunder in the assets, earnings and profits
of the Master Trust shall be transferable or assignable or subject to
alienation, encumbrance, garnishment, attachment, anticipation, execution or
levy of any kind, voluntary or involuntary, while in the possession or control
of the Trustee, except as may otherwise be required by law.
 
  9.2. This Agreement and the Master Trust shall be construed, regulated and
administered according to ERISA and, to the extent not preempted thereby, the
laws of the State of Ohio.
 
  9.3. The Trustee shall be fully protected in relying upon a certification
signed by one or more of the members of the Committee (as shall be designated
in a written instrument signed by all the members of the Committee and filed
with the Trustee) with respect to any instruction, direction or approval of the
Committee, and in continuing to rely upon such certification and/or instrument
until a subsequent one is filed with the Trustee. The Trustee shall be fully
protected in relying upon the genuineness of any instrument, certificate, or
paper reasonably believed by it to be genuine and to be signed or presented by
the proper person(s), and the Trustee shall be under no duty to make any
investigation or inquiry as to any statement contained in any such writing but
may accept the same as conclusive evidence of the truth and accuracy of the
statements therein contained. The Trustee shall have no duty to see to the
proper application of any part of the Master Trust if distributions are made in
accordance with the written directions of the Committee as herein provided, nor
shall the Trustee be responsible for the adequacy of
 
                                       12

 
the Master Trust to meet and discharge any and all distributions and
liabilities under any Participating Plan. All persons dealing with the Trustee
are released from inquiry into the decisions or authority of the Trustee and
from seeing to the application of any moneys, securities, or other property
paid or delivered to the Trustee.
 
  9.4. In accepting the trust hereby created, the Trustee acts solely as
trustee hereunder and not in its individual capacity, and all persons, other
than the Company, having any claim against the Trustee by reason of the
transactions contemplated hereby shall look only to the assets of the Master
Trust for payment or satisfaction thereof.
 
  9.5. In any application to the courts for an interpretation of this
Agreement or for an accounting by the Trustee, only the Trustee and the
Company shall be necessary parties; and, unless otherwise ordered by the court
entertaining jurisdiction thereover, no employee shall be entitled to any
notice or service of process. Any final judgment entered in such an action or
proceeding shall be conclusive upon all persons claiming under this Master
Trust.
 
  9.6. The Trustee, in accordance with the written instructions of the
Company, shall withhold any tax which by any present or future law is required
to be withheld from any payment made hereunder.
 
  9.7. The Trust created by this document shall be known as the Eastern
Enterprises Master Trust.
 
  9.8. Reference is hereby made to the Declaration of Trust establishing
Eastern Gas and Fuel Associates (now known as Eastern Enterprises) dated July
18, 1929, as amended, a copy of which is on file in the office of the
Secretary of the Commonwealth of Massachusetts. The name Eastern Enterprises
refers to the trustees under said Declaration of Trust as trustees and not
personally; and no trustee, shareholder, officer or agent of Eastern
Enterprises shall be held to any personal liability in connection with the
affairs of said Eastern Enterprises but the trust estate only is liable.
 
  In Witness Whereof, the Company and the Trustee have caused this Master
Trust Agreement to be executed this 28th day of April 1995, on their behalf by
their duly authorized officers as of the date first above written.
 
                                          Eastern Enterprises
 
                                                     /s/ L.W. Law, Jr.
                                          By: _________________________________
                                                   Senior Vice President
 
                                          And
 
                                                     /s/ J. Scholtens
                                          _____________________________________
                                                         Treasurer
 
                                          Key Trust Company of Ohio, N.A.
 
                                                    /s/ M. H. Halloran
                                          By: _________________________________
                                                       Trust Officer
 
                                          And
 
                                                       /s/  J. Ruff
                                          _____________________________________
                                                      Vice President
 
                                      13

 
                                   EXHIBIT A
 
                                     TO THE
 
                              EASTERN ENTERPRISES
 
                               MASTER TRUST WITH
 
                        KEY TRUST COMPANY OF OHIO, N.A.
 
  The following is a listing of the employee pension benefit plans of the
Company which shall be permitted to invest in the Master Trust.
 
    1. Eastern Enterprises Headquarters Retirement Plan.
 
    2. Boston Gas Company Retirement Plan.
 
    3. Midland Enterprises Inc. Salaried Retirement Plan.
 
                                       14