EXHIBIT 10

                           STATE STREET CORPORATION

                401(k) RESTORATION AND VOLUNTARY DEFERRAL PLAN


                            Effective July 1, 1999


                               TABLE OF CONTENTS


                                                                                                              
ARTICLE I NAME AND PURPOSE OF PLAN AND DEFINITIONS..........................................................      1
         1.1      Name and purpose..........................................................................      1
         1.2      Definitions...............................................................................      1

ARTICLE II ELIGIBILITY AND PARTICIPATION....................................................................      5
         2.1      Eligibility...............................................................................      5
         2.2      Commencement of participation.............................................................      5
         2.3      Cessation of eligibility..................................................................      7

ARTICLE III DEFERRED COMPENSATION AGREEMENTS, MATCHING CREDITS, NOTIONAL INVESTMENT OF ACCOUNTS.............      8
         3.1      Deferred Compensation Agreement.  ........................................................      8
         3.2      Deferrals must be elected in advance......................................................      8
         3.3      Amount of deferrals.......................................................................      9
         3.4      Changes in Deferred Compensation Agreement................................................     10
         3.5      Deferred Compensation Agreement effective on
                    Plan Administrator's approval...........................................................     10
         3.6      Matching Credit. .........................................................................     10
         3.7      Notional investment of Accounts.  ........................................................     10
         3.8      Accounting.  .............................................................................     11

ARTICLE IV VESTING..........................................................................................     12
         4.1      Vesting of Accounts.......................................................................     12

ARTICLE V PLAN DISTRIBUTIONS................................................................................     13
         5.1      Time of payment; in general...............................................................     13
         5.2      Option to elect payment at a specified date;
                    changes in distribution election........................................................     14
         5.3      Amount and form of payment; special rules for death and disability........................     16
         5.5      Hardship withdrawals......................................................................     18
         5.6      Certain tax matters.......................................................................     18
         5.7      Distribution of taxable amounts...........................................................     19

ARTICLE VI ADMINISTRATION OF THE PLAN.......................................................................     20
         6.1      Plan Administrator........................................................................     20
         6.2      Outside services..........................................................................     20
         6.3      Indemnification...........................................................................     20
         6.4      Claims procedure..........................................................................     21


                                      -i-



                                                                                                              
ARTICLE VII AMENDMENT AND TERMINATION.......................................................................     23
         7.1      Amendment; termination....................................................................     23
         7.2      Effect of amendment or termination........................................................     23

ARTICLE VIII MISCELLANEOUS PROVISIONS.......................................................................     24
         8.1      Source of payments........................................................................     24
         8.2      Other arrangements made subject to the Plan...............................................     24
         8.3      No warranties.............................................................................     25
         8.4      Inalienability of benefits................................................................     25
         8.5      Expenses..................................................................................     25
         8.6      No right of employment.  .................................................................     25
         8.7      Headings..................................................................................     25
         8.8      Acceptance of Plan terms.  ...............................................................     25
         8.9      Construction..............................................................................     26


                                     -ii-


ARTICLE 1
                   NAME AND PURPOSE OF PLAN AND DEFINITIONS
                   ----------------------------------------

1.1  Name and purpose.  State Street Corporation established the Plan effective
     ----------------
     as of July 1, 1999. The purpose of the Plan is twofold: to permit
     Participants to defer base pay and incentive pay in amounts exceeding those
     that may be deferred under the Basic Plan; and to make up, in the form of
     additional credits under the Plan, for certain matching contributions that
     cannot be made under the Basic Plan.

     The Plan is not intended to be qualified under Code (S) 401(a).  The
     obligations of the Corporation and its subsidiaries under the Plan are
     intended to remain at all times unfunded for purposes of the Code and
     ERISA, and no Participant or Beneficiary shall have any rights under the
     Plan that are greater than those of an unsecured general creditor.

1.2  Definitions.  Capitalized terms have the meaning set forth below unless a
     -----------
     different meaning is required by the context:

     (1)  "Account" means the bookkeeping account (or, as the context requires,
          the balance of the bookkeeping account) maintained by the Plan
          Administrator to reflect an Employer's obligations under the Plan with
          respect to any or all, as the context requires, of the following with
          respect to a Participant: elective deferrals (if any), Matching
          Credits (if any), and notional investment experience relating to
          either or both of the foregoing. The fact that the Plan Administrator
          maintains an Account for a Participant or Beneficiary does not require
          that the Employer's obligations represented by that Account be funded
          in any way or that the Participant or Beneficiary, as the case may be,
          has any

                                      -1-


          right or claim (other than that of an unsecured general creditor) to
          any assets of the Employer.

     (2)  "Applicable Compensation" has the same meaning as in the Basic Plan,
          determined without regard to the limitations of Code (S) 401(a)(17)
          (or the comparable limitations in the Basic Plan) and without regard
          to any exclusion for amounts electively deferred under the Plan.

     (3)  "Basic Plan" means the State Street Corporation and Certain Related
          Companies Salary Savings Program.

     (4)  "Beneficiary" means the person or persons designated by the
          Participant in writing, subject to such rules as the Plan
          Administrator may prescribe, to receive benefits under the Plan in the
          event of the Participant's death. In the absence of an effective
          designation at the time of the Participant's death, the Participant's
          Beneficiary shall be his or her surviving spouse, or, if the
          Participant is then unmarried or his or her spouse does not survive,
          the Participant's estate.

     (5)  "Board" means the Board of Directors of State Street Corporation.

     (6)  "Code" means the Internal Revenue Code of 1986, as amended from time
          to time.

     (7)  "Deferred Compensation Agreement" means the written agreement
          described in Section 3.1.

                                      -2-


     (8)   "Effective Date" means July 1, 1999.

     (9)   "Employee" means, except as otherwise provided by the Plan
           Administrator, an individual employed by the Employer who is on the
           Quincy, Massachusetts payroll.

     (10)  "Employer" means any or all, as the context requires, of State Street
           Corporation and any other related company that adopts this Plan with
           State Street Corporation's approval. Except as otherwise provided in
           Section 5.1, an individual employed by an Employer shall be
           considered to have suffered a termination of employment when the
           Employer (or the division or other business unit of the Employer
           where the individual is employed) is sold or otherwise disposed of in
           a transaction described in Section 5.1(i).

     (11)  "Entry Date" means July 1, 1999 and any subsequent January 1.

     (12)  "ERISA" means the Employee Retirement Income Security Act of 1974, as
           amended.

     (13)  "Incentive Pay" means an Employee's cash bonus and/or cash incentive
           pay payable under a bonus and/or incentive plan maintained by the
           Employer, other than (i) any such bonus or incentive pay that is
           automatically deferred pursuant to the terms of such bonus and/or
           incentive plan, and/or (ii) any such bonus or incentive pay that is
           payable under a plan or program that is determined by the Plan
           Administrator to be ineligible for deferral under the Plan.

     (14)  "Matching Credit" means an amount credited under Section 3.6.

                                      -3-


     (15)  "Participant" means an Employee who meets the eligibility
           requirements of the Plan and elects to participate in the Plan, or
           who has an Account under the Plan.

     (16)  "Plan" means the State Street Corporation 401(k) Restoration and
           Voluntary Deferral Plan, as from time to time amended and in effect.

     (17)  "Plan Administrator" means the Plan Administrator appointed pursuant
           to Section 6.1.

     (18)  "Plan Year" means the period July 1 through December 31, 1999 and
           each calendar year thereafter.

                                      -4-


ARTICLE 2
                         ELIGIBILITY AND PARTICIPATION
                         -----------------------------

2.1  Eligibility.  An Employee is eligible to participate in the Plan for a Plan
     -----------
     Year only if:

     (1)  his or her annual rate of Applicable Compensation, determined as of
          the October 1 immediately preceding the beginning of the Plan Year
          (April 1, 1999 in the case of the first Plan Year) is not less than
          the dollar limit for the Plan Year under Code (S) 401(a)(17); and

     (2)  he or she has the title of vice president (or equivalent) or higher.

     It is intended that eligibility to participate in the Plan shall in all
     events be limited to a "select group of management or highly compensated
     employees" as that term is used in ERISA Sections 201(2), 301(a)(3) and
     401(a)(1) (a "top-hat group"), and to that end the Plan Administrator shall
     have the right to limit eligibility selectively by excluding from
     eligibility any individual who, although satisfying the requirements of (a)
     and (b) above, may not, in the determination of the Plan Administrator, be
     treated as includible in a "top-hat group."

2.2  Commencement of participation.
     -----------------------------

     (1)  Employees hired before 2000:
          ---------------------------

          (1)  If an Employee is hired on or before April 1, 1999 and is
               otherwise eligible to participate in the Plan, he or she may
               elect to commence

                                      -5-


               participation effective July 1, 1999 or on any subsequent January
               1 provided he or she continues to be eligible.

          (2)  If an Employee is hired after April 1, 1999 and on or before
               December 31, 1999, and is otherwise eligible to participate in
               the Plan, he or she may elect to commence participation according
               to the following table:



                  Date of hire                             Date of initial participation
                  ------------                             -----------------------------
                                                      
          April 2 through September 30, 1999             January 1, 2000 or any subsequent
                                                         January 1 while eligible

          October 1 through December 31, 1999            January 1, 2001 or any subsequent
                                                         January 1 while eligible
 

     (2)  Employees hired after 1999:  If an Employee is hired after 1999
          --------------------------
          and is otherwise eligible to participate, he or she may elect to
          commence participation according to the following table:



                  Date of hire                      Date of participation
                  ------------                      ---------------------
                                                 
          January 1 through September 30                January 1 following date of hire or
                                                        any subsequent January 1 while
                                                        eligible

          October 1 through December 31                  Second January 1 following date of
                                                         hire or any subsequent January 1
                                                         while eligible


                                      -6-



2.3  Cessation of eligibility. If after commencing participation in the Plan a
     ------------------------
     Participant's annual rate of Applicable Compensation falls below the
     limitation amount then applicable under Code (S) 401(a)(17), the
     Participant's participation in the Plan shall promptly be adjusted as
     follows: (i) until such time as the Participant's annual rate of Applicable
     Compensation again exceeds the applicable limitation amount under Code (S)
     401(a)(17), the Participant shall be ineligible to elect deferrals from
     Applicable Compensation, and any prior election shall be suspended insofar
     as it relates to Applicable Compensation; (ii) no additional Matching
     Credits shall be made to the Participant's Account; but (iii) the
     Participant (so long as he or she is not otherwise ineligible to continue
     active participation in the Plan) may continue to elect deferrals from
     Incentive Pay (and any prior election shall continue to be given effect
     insofar as it relates to Incentive Pay), and the Participant's Account
     shall continue to be adjusted for notional earnings or other notional
     investment experience. If after commencing participation in the Plan a
     Participant ceases to have the title of vice president (or equivalent) or a
     higher title, all additional deferrals and Matching Credits under the Plan
     shall cease effective with the next Plan Year; provided, that the
     Participant's Account shall continue to be adjusted for notional earnings
     or other notional investment experience.

                                      -7-


ARTICLE 3
                       DEFERRED COMPENSATION AGREEMENTS,
                          MATCHING CREDITS, NOTIONAL
                            INVESTMENT OF ACCOUNTS
                            ----------------------

3.1  Deferred Compensation Agreement.  An eligible Employee may elect to defer a
     -------------------------------
     portion of his or her Applicable Compensation and/or Incentive Pay by
     entering into a Deferred Compensation Agreement. Amounts deferred shall be
     credited to the Participant's Account as soon as practicable after the
     deferral is withheld from pay.

3.2  Deferrals must be elected in advance.
     ------------------------------------

     (1)  Deferrals from Applicable Compensation.  Insofar as it relates to
          --------------------------------------
          Applicable Compensation, a Deferred Compensation Agreement must be
          received and accepted by the Plan Administrator prior to the
          applicable Entry Date for the Plan Year in which the Applicable
          Compensation is to be earned (or by such earlier date as the Plan
          Administrator may prescribe).

     (2)  Deferrals from Incentive Pay. Insofar as it relates to Incentive Pay,
          ----------------------------
          a Deferred Compensation Agreement must be received and accepted by the
          Plan Administrator prior to the Entry Date for the Plan Year in which
          the Incentive Pay is to be earned (or by such earlier date as the Plan
          Administrator may prescribe); provided, that the initial Deferred
          Compensation Agreement of a Participant commencing participation as of
          July 1, 1999 may apply to all Incentive Pay earned by the Participant
          for calendar year 1999 and not yet payable as of July 1, 1999.

                                      -8-


     (3)  Year by year deferrals.  Except as otherwise determined by the Plan
          ----------------------
          Administrator, a new Deferred Compensation Agreement must be timely
          executed for each Plan Year.

3.3  Amount of deferrals.
     -------------------

     (1)  Applicable Compensation. For each Plan Year an eligible Employee may
          -----------------------
          elect to defer the excess, if any, of (i) an amount selected by the
          Participant from 6% to 15%, in whole percentages, of his or her
          Applicable Compensation for the Plan Year, over (ii) the dollar
          limitation in effect for the Plan Year under Code (S) 402(g)
          (provided, that for the short first Plan Year the amount described in
          this clause shall be $5,000). Notwithstanding the foregoing, the Plan
          Administrator may require a minimum deferral greater than 6% of
          Applicable Compensation or impose a maximum limit that is less than
          15% of Applicable Compensation.

     (2)  Incentive Pay. An eligible Employee may elect to defer up to 100% of
          -------------
          his or her Incentive Pay for a Plan Year, subject to the requirements
          of this subsection. The election to defer Incentive Pay may specify
          either the percentage amount to be deferred (in increments of 25%) or
          a whole dollar amount not less than $5,000; provided, that if the
          eligible Employee's total Incentive Pay for the Plan Year turns out to
          be less than $5,000, no portion thereof shall be deferred; and further
          provided, that if the eligible Employee's total Incentive Pay for the
          Plan Year is greater than $5,000 but the eligible Employee made a
          percentage deferral election that if literally applied would result in
          a deferral of less than $5,000, the amount deferred shall be $5,000.

                                      -9-


3.4  Changes in Deferred Compensation Agreement. An eligible Employee may
     ------------------------------------------
     not change the amount he or she elects to defer under a Deferred
     Compensation Agreement after the beginning of the Plan Year to which the
     Agreement applies.

3.5  Deferred Compensation Agreement effective on Plan Administrator's approval.
     --------------------------------------------------------------------------
     A Deferred Compensation Agreement shall become effective only if accepted
     and approved by the Plan Administrator.

3.6  Matching Credit. For each Plan Year in which an eligible Employee enters
     ---------------
     into a Deferred Compensation Agreement with respect to his or her
     Applicable Compensation, a Matching Credit shall be added to his or her
     Account equal to the excess of (a) 3% of the Participant's Applicable
     Compensation for the Plan Year over (b) the maximum matching employer
     contribution which could have been made for the benefit of a participant
     under the Basic Plan for the Plan Year. Matching Credits shall be added to
     the Participant's Account monthly.

3.7  Notional investment of Accounts.  All Accounts hereunder shall be adjusted
     -------------------------------
     for notional (hypothetical) investment experience as described in this
     Section. The Plan Administrator shall designate for purposes of the Plan
     one or more existing investment or investment-fund alternatives (each, a
     "Tracking Option"), and shall give each Participant and the Beneficiary of
     each deceased Participant for whom an Account continues to be maintained
     the opportunity to allocate his or her Account(s) and/or additional
     deferrals or Matching Credits among the available Tracking Options. Amounts
     allocated under the Plan to a Tracking Option shall be treated as though
     notionally invested in that Tracking Option. In the absence of an
     affirmative allocation by a Participant or Beneficiary, the Plan
     Administrator may designate a default Tracking Option and treat the
     Account(s), deferrals or Matching Credits, as the case may be, (or such
     portion thereof as shall not have been affirmatively allocated by the

                                      -10-


     Participant or Beneficiary) as being notionally invested in the default
     Tracking Option. The Plan Administrator shall periodically adjust Accounts
     to reflect increases or decreases attributable to these notional
     investments. Except as otherwise determined by the Plan Administrator, a
     Participant or Beneficiary may make notional investment changes once per
     calendar month. The Plan Administrator may prescribe such rules as it deems
     appropriate to carry out the purposes of this Section, including rules that
     offer a return of notional interest (for example, as in a bank savings
     account) as a Tracking Option. The Plan Administrator may at any time and
     from time to time eliminate or add Tracking Options or substitute a new for
     an existing Tracking Option, including with respect to balances already
     notionally invested under the Plan. An Employer may, but need not, purchase
     securities or other investments with characteristics similar to the
     Tracking Options from time to time offered under the Plan, but any such
     securities or other investments shall remain part of the Employer's general
     assets in the event of insolvency or bankruptcy.

3.8  Accounting.  The Plan Administrator shall maintain such accounts and
     ----------
     prepare such reports as it considers to be necessary or appropriate to
     carry out the purposes of the Plan. In addition to the adjustments to
     Accounts referred to in Section 3.7 above (to reflect notional investment
     experience), the Plan Administrator shall increase each Account to reflect
     additional deferrals or Matching Credits and shall decrease the Account to
     reflect withdrawals or distributions.

                                      -11-


ARTICLE 4
                                    VESTING
                                    -------

4.1  Vesting of Accounts.  Each Participant shall be one hundred percent (100%)
     -------------------
     vested at all times in his or her Account. The fact that a Participant is
     fully vested in his or her Account shall not give the Participant (or his
     or her Beneficiary) any right to receive the value of such Account (as the
     same may from time to time be adjusted) except in accordance with the terms
     of the Plan.

                                      -12-


ARTICLE 5

                              PLAN DISTRIBUTIONS
                              ------------------

5.1  Time of payment; in general.  Each Participant shall elect, in connection
     ---------------------------
     with his or her commencement of participation in the Plan, whether his or
     her benefits under the Plan are to be received or are to commence at
     termination of employment whenever occurring or, alternatively and subject
     to Section 5.2 below, are to be received or are to commence at a specified
     future date. In the absence of an affirmative election, the Participant
     shall be deemed to have elected to receive (or to commence to receive) his
     or her benefit upon termination of employment. Except as otherwise provided
     in the Plan, a Participant's election or deemed election in connection with
     commencement of participation in the Plan shall govern the distribution of
     all deferrals and credits under the Plan with respect to the Participant.
     The Participant's Employer (or, if there is more than one Employer, the
     Participant's several Employers on such allocated basis as the Plan
     Administrator determines) shall pay or commence to pay the benefit owed to
     the Participant or his or her Beneficiary under the Plan on or as soon as
     practicable following the date or event entitling the Participant or his or
     her Beneficiary(ies) to a distribution.

     For all purposes of the Plan, if (i) a Participant is working for an
     Employer (or a division or business unit of an Employer) that is sold or
     otherwise disposed of, or whose assets are sold are otherwise disposed of,
     in a transaction or a series of related transactions (a "transaction"), and
     (ii) the acquiring or surviving entity or an affiliate thereof assumes the
     Employer's obligations under the Plan with respect to the Participant, and
     (iii) following the transaction, the Participant continues to work for the
     acquiring or surviving entity or an affiliate thereof, the Participant
     shall not be treated as having suffered a "termination of employment" until
     such time as his or her

                                      -13-


     employment with the acquiring or surviving entity and its affiliates
     terminates. Rules similar to the rule set forth in the immediately
     preceding sentence shall apply to any subsequent sale or disposition of the
     business for which the Participant is working.

5.2  Option to elect payment at a specified date; changes in distribution
     --------------------------------------------------------------------
     election.  At the time a Participant first elects to make a deferral under
     --------
     the Plan, he or she may elect that Plan benefits be distributed (or if
     distributable in installments, commence to be distributed) as of a fixed
     date not earlier than five (5) years following the date of initial
     participation, subject to the following rules:

     (1)  All amounts deferred by the Participant or credited to his or her
          Account during the period between the election of a specified future
          distribution date and the occurrence of such date shall be distributed
          or commence to be distributed as soon as practicable following the
          occurrence of such date. For the Plan Year in which the specified
          distribution date falls, no deferrals under Section 3.3(a) may be made
          with respect to Applicable Compensation earned after the specified
          date.

     (2)  If the specified distribution date occurs before termination of
          employment, the Participant's benefit shall be paid out in a single
          lump sum as soon as practicable following the specified date;

     (3)  If the Participant's termination of employment occurs before the
          specified distribution date and before the Participant has both
          attained age 55 and completed at least five (5) years of employment
          with the Employer, the Participant's benefit shall be paid out in a
          single lump sum as soon as practicable following termination of
          employment;

                                      -14-


     (4)  If the Participant's termination of employment occurs after the
          Participant has attained age 55 and completed at least five (5) years
          of employment, but before the specified date, the Participant's
          specified-date election shall remain in effect and the Participant's
          benefit shall be distributed (or if distributable in installments,
          commence to be distributed) as soon as practicable following the
          specified distribution date; and

     (5)  If the Participant should die before the specified distribution date,
          his or her benefit shall be paid in a single lump sum to his or her
          Beneficiary or Beneficiaries as soon as practicable following death.

Once distribution of a Participant's Account has been made in connection with
the occurrence of a specified distribution date under this Section 5.2, the
Participant (if then still eligible under Section 2.1 to participate in the
Plan) may elect that future deferrals be distributed (or commence to be
distributed) either upon termination of employment whenever occurring or,
subject to the rules of this Section 5.1, upon the occurrence a new specified
distribution date not fewer than five (5) years in the future; provided, that in
the absence of an effective election made not later than the close of the Plan
Year in which the distribution occurred, the Participant shall be deemed to have
elected that future deferrals be distributed (or commence to be distributed)
upon termination of employment.  The election of new, future specified
distribution dates in accordance with the preceding sentence shall not be
considered a one-time change for purposes of Section 5.4.  However, if a
Participant has at any time elected or been deemed to have elected a
distribution upon termination of employment, any subsequent election to specify
a fixed future distribution date (not fewer than five (5) years in the future)
shall be deemed a one-time change for purposes of Section 5.4.  Moreover, any
election to extend an already elected specified future distribution date shall
be considered a change subject to the one-time change rules of Section 5.4.  The
Plan Administrator may prescribe additional rules to carry out the purposes of
this Section and Section 5.4.

                                      -15-


5.3  Amount and form of payment; special rules for death and disability.
     ------------------------------------------------------------------

     (1)  Amount of benefit.  The benefit payable to any Participant or
          -----------------
          Beneficiary in the Plan shall be balance of his or her Account,
          adjusted as described below in the case of installment payments.

     (2)  Normal form of payment.  Notwithstanding any election to the contrary,
          ----------------------
          payment of a Participant's benefit shall be made in a single cash lump
          sum unless the Participant

          (1)  has attained age 55 before termination of employment and has
               completed at least five (5) years of employment with the
               Employer;

          (2)  has previously elected to receive installment payments pursuant
               to Section 5.3(b) below; and

          (3)  has an Account balance that at the time benefits are to commence
               equals at least $50,000.

     (3)  Installments.  At the time he or she first commences participation in
          ------------
          the Plan, a Participant may elect to receive his or her benefit either
          in the form of a single cash lump sum or (if the requirements of
          (a)(i), (ii) and (iii) above are ultimately satisfied) in the form of
          annual cash installment payments over a five, ten or fifteen-year
          period. Each installment payment shall be determined by dividing the
          Account balance (or remaining Account balance) immediately prior to
          the payment date by the number of installments remaining to be paid.
          In the absence of an election by the Participant, or if the
          Participant fails to satisfy one

                                      -16-


          of the requirements of (a)(i), (ii) or (iii) above, the Participant's
          benefit shall be distributed in a single lump sum cash payment.

     (4)  Payments on account of total and permanent disability.  In the event a
          -----------------------------------------------------
          Participant becomes eligible for long term disability benefits under
          the Employer's long term disability plan, the Participant may request
          the Plan Administrator to approve an early distribution of all or a
          portion of his or her Account. The Plan Administrator shall have sole
          discretion as to whether an early distribution shall be permitted and
          as to the amount, form and timing of such distribution.

     (5)  Payment upon death.  As soon as practicable following a Participant's
          ------------------
          death, the Participant's remaining Account, if any, shall be
          distributed in a single lump sum cash payment to the Participant's
          Beneficiary or Beneficiaries.

5.4  One-time changes to distribution elections
     ------------------------------------------

     Each Participant has one opportunity during his or her participation in the
     Plan (and while the Participant is still an Employee) to change irrevocably
     the form of distribution or the distribution date for his or her Plan
     benefit in one of the following ways:  (i) a change from an election or
     deemed election to have distribution occur upon termination of employment
     to an election of a specified future distribution date; (ii) a deferral of
     an already elected specified distribution date; (iii) a change from an
     election of a specified future distribution date to an election to have
     distribution occur upon termination of employment, or (iv) a change in the
     form of the distribution (installments to lump sum or vice versa).  Any
     change described in the immediately preceding sentence must conform to the
     following special rules:  (A) it must be made at least six (6) months prior
     to the beginning of the Plan Year in which the Participant's benefit, but
     for the

                                      -17-


     change, would have been distributed or would have commenced to be
     distributed; and (B) it cannot result in a payment that is made or
     commences earlier than the January 1 which follows by at least six months
     the date of the change.

5.5  Hardship withdrawals.  A Participant may request a withdrawal not in excess
     --------------------
     of the lesser of (i) the balance of his or her Account, or (ii) the
     aggregate amount of the Participant's elective deferrals of Applicable
     Compensation and/or Incentive Pay credited under the Plan. For the
     avoidance of doubt, portions of a Participant's Account attributable to
     Matching Credits or to notional investment experience on any portion of the
     Participant's Account balance shall not be available for withdrawal. The
     Plan Administrator, in its sole discretion, shall determine whether to
     grant a withdrawal request and the amount of the withdrawal. Withdrawals
     shall be made first from Incentive Pay deferrals and next from Applicable
     Compensation deferrals.

5.6  Certain tax matters.  Payments hereunder shall be reduced by required tax
     -------------------
     withholdings. To the extent any deferral or credit under the Plan results
     in current "wages" for FICA purposes, a Participant's Employer may reduce
     other pay of the Participant to satisfy withholding requirements related
     thereto; but if there is no other pay (or if the Employer fails to withhold
     from such other pay to satisfy its FICA withholding obligations), the
     Participant's Account shall be appropriately reduced by the amount of the
     required withholding.

5.7  Distribution of taxable amounts.  Notwithstanding the foregoing, if any
     -------------------------------
     Participant or Beneficiary is determined by the Plan Administrator to be
     subject to federal income tax on any amount credited to his or her Account
     prior to the time of payment hereunder, the entire amount determined to be
     so taxable shall be paid by the Employer to such Participant or
     Beneficiary.

                                      -18-


ARTICLE 6

                          ADMINISTRATION OF THE PLAN
                          --------------------------


6.1  Plan Administrator.  Except as the Compensation Committee of the Board may
     ------------------
     otherwise determine, the Plan Administrator shall be the Executive Vice
     President-Global Human Resources as from time to time in office and his or
     her delegates. The Plan Administrator shall have the discretionary
     authority to interpret the Plan, to determine an individual's eligibility
     for participation in or benefits under the Plan (and to determine the
     amount of any such benefits), to carry out the responsibilities and to
     exercise the authority expressly reserved to the Plan Administrator under
     the Plan, and to take all such other actions (whether or not expressly
     referenced in the Plan) as it deems necessary or appropriate to administer
     the Plan in accordance with its terms. However, no individual acting,
     directly or by delegation, as the Plan Administrator may determine his or
     her own rights or entitlements under the Plan.

6.2  Outside services.  The Plan Administrator may engage counsel and such
     ----------------
     clerical, financial, investment, accounting, and other specialized services
     as the Plan Administrator may deem necessary or appropriate in the
     administration of the Plan. The Plan Administrator shall be entitled to
     rely upon any opinions, reports, or other advice furnished by counsel or
     other specialists engaged for that purpose and, in so relying, shall be
     fully protected in any action, determination, or omission made in good
     faith.

6.3  Indemnification.  To the extent permitted by law and not prohibited by its
     ---------------
     charter and by-laws, State Street Corporation will indemnify and hold
     harmless every person serving (directly or by delegation) as Plan
     Administrator and the estate of such an individual if he or she is deceased
     from and against all claims, loss, damages, liability

                                      -19-


     and reasonable costs and expenses incurred in carrying out his or her
     responsibilities as Plan Administrator, unless due to the gross negligence,
     bad faith or willful misconduct of such individual; provided, that counsel
     fees and amounts paid in settlement must be approved by State Street
     Corporation and provided further that this Section 6.3 will not apply to
     any claims, loss, damages, liability or costs and expenses which are
     covered by a liability insurance policy maintained by State Street
     Corporation or by the individual. The provisions of the preceding sentence
     shall not apply to any corporate trustee, insurance company, investment
     manager or outside service provider (or to any employee of any of the
     foregoing) unless State Street Corporation otherwise specifies in writing.

6.4  Claims procedure.  If any Participant or Beneficiary makes a claim under
     ----------------
     the Plan and the claim is denied in whole or in part, the Plan
     Administrator shall so notify the claimant within ninety (90) days after
     receipt of the claim (one hundred eighty (180) days after receipt of the
     claim, if the Plan Administrator requires additional time and notifies the
     claimant of the extension within the original 90-day period), but if the
     Plan Administrator fails to provide notification to the claimant, the claim
     shall be deemed denied at the end of the 90-day or 180-day period,
     whichever is applicable. Any notice of such denial shall set forth, in
     addition to the specific reasons for the denial, the following:

     (1)  reference to pertinent provisions of the Plan;

     (2)  a description of any additional information or material necessary to
          perfect the claim and an explanation of why it is necessary; and

                                      -20-


(3)  an explanation of the claims review procedure including advising the
     claimant that he or she may request the opportunity to review pertinent
     Plan documents and submit a statement of issues and comments in writing.

Within sixty days following receipt of notice of denial of his or her claim, a
claimant may request a review of such denial by the Plan Administrator. The Plan
Administrator shall take appropriate steps to review its decision in light of
any further information or comments submitted by such claimant. The Plan
Administrator shall render its decision on review within sixty (60) days after
claimant's request for review (one hundred twenty (120) days after receipt of
the request if the Plan Administrator requires additional time and notifies the
claimant of the extension within the original 60-day period) and shall advise
claimant in writing of its decision on review, specifying its reasons and
identifying appropriate provisions of the Plan or of its own rules, including
rules adopted to address any matters raised by the then claimant, whether as a
matter of first impression or otherwise. If the Plan Administrator does not
provide written notice in accordance with the foregoing of its determination on
review, the claimant's request for review will be deemed denied as of the end of
the 60-day or 120-day period, whichever is applicable. Reference herein to
"claimant" shall be deemed to include the claimant's duly authorized
representative.

                                      -21-


ARTICLE 7

                           AMENDMENT AND TERMINATION
                           -------------------------

7.1  Amendment; termination.  By action of the Compensation Committee of the
     ----------------------
     Board or its delegate, State Street Corporation reserves the absolute right
     at any time and from time to time to amend any or all provisions of the
     Plan, and to terminate the Plan at any time. In addition, the Plan
     Administrator shall have the right at any time and from time to time to
     make amendments to the Plan (in general or with respect to one or more
     individual Participants or Beneficiaries) that are administrative in nature
     and that do not materially increase the financial obligations of the
     Employer, including, without limitation, amendments coordinating the
     provisions of the Plan with the terms of any severance, separation or
     similar plan or agreement.

7.2  Effect of amendment or termination.  No action under Section 7.1 shall
     ----------------------------------
     operate to reduce (other than through a distribution) the balance of a
     Participant's Account as compared to such balance immediately prior to the
     effectiveness of such action. Subject to the foregoing, a Plan amendment or
     instrument or termination may accelerate or defer distributions under the
     Plan and may otherwise alter the availability of elections or other rights
     under the Plan.

                                      -22-


ARTICLE 8

                           MISCELLANEOUS PROVISIONS
                           ------------------------

8.1  Source of payments.  All payments hereunder to Participants and their
     ------------------
     Beneficiaries shall be paid from the general assets of the Employer,
     including for this purpose, if the Employer in its sole discretion so
     determines, assets of one or more trusts established to assist in the
     payment of benefits hereunder. Any trust established pursuant to the
     preceding sentence shall provide that trust assets remain subject to the
     employer's general creditors in the event of insolvency or bankruptcy and
     shall otherwise contain such terms as are necessary to ensure that they do
     not constitute a "funding" of the Plan for purposes of the Code or ERISA.

8.2  Other arrangements made subject to the Plan.  The Committee in its
     -------------------------------------------
     discretion may provide that other deferrals of compensation by persons
     providing services to an Employer be governed in whole or in part by the
     provisions of the Plan; provided, that the second paragraph of Section 1.1
     and the last sentence of Section 2.1 shall in all events apply to such
     extensions of the Plan. Without limiting the foregoing, (i) amounts
     denominated in cash that as of June 30, 1999 had been earned but were being
     deferred under the State Street Corporation Senior Executive Annual
     Incentive Plan (the "SEAIP") shall be treated, commencing July 1, 1999, as
     having been notionally invested pursuant to Section 3.7 of the Plan (but
     the distribution provisions applicable to such balances shall continue to
     be those which applied under the SEAIP), and (ii) amounts thereafter
     deferred under the terms of the SEAIP, other than any such amounts
     denominated in shares of Deferred Stock under the provisions of the State
     Street Corporation 1997 Equity Incentive Plan (or any successor plan),
     shall be treated for all purposes as having been deferred under the Plan
     and shall be subject in all respects to the terms of the Plan.

                                      -23-


8.3  No warranties.  Neither the Plan Administrator nor any Employer warrants
     -------------
     or represents in any way that the value of a Participant's Account will
     increase or not decrease. Each Participant (and his or her Beneficiary)
     assumes all risk in connection with any change in such value.

8.4  Inalienability of benefits.  Except as required by law, no benefit under,
     --------------------------
     or interest in, the Plan shall be subject in any manner to anticipation,
     alienation, sale, transfer, assignment, pledge, encumbrance, or charge, and
     any attempt to do so shall be void.

8.5  Expenses.  The Employers shall pay all costs and expenses incurred in
     --------
     operating and administering the Plan.

8.6  No right of employment.  Nothing contained herein, nor any action taken
     ----------------------
     under the provisions hereof, shall be construed as giving any Participant
     the right to be retained in the employ of an Employer.

8.7  Headings.  The headings of the sections in the Plan are placed herein for
     --------
     convenience of reference, and, in the case of any conflict, the text of the
     Plan, rather than such heading, shall control.

8.8  Acceptance of Plan terms.  By executing a Deferred Compensation Agreement,
     ------------------------
     a Participant agrees, on his or her behalf and on behalf of his or her
     Beneficiaries, to abide by the terms of the Plan and the determinations of
     the Plan Administrator with respect thereto.

8.9  Construction.  The Plan shall be construed, regulated, and administered in
     ------------
     accordance with the laws of the Commonwealth of Massachusetts and
     applicable federal laws.

                                      -24-


IN WITNESS WHEREOF,  the Employer has caused this instrument to be executed by
it duly respective duly authorized officer as of July 1, 1999.

                              STATE STREET CORPORATION


                         By:  ______________________________________

                                      -25-