59 WALL STREET FUND INC
485BPOS, 1997-11-03
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    As filed with the Securities and Exchange Commission on November 3, 1997

                                         Registration No. 33-48605 and 811-06139
                                               (The 59 Wall Street Mid-Cap Fund)
===============================================================================
    

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM N-1A
                          REGISTRATION STATEMENT UNDER
                                         
                           THE SECURITIES ACT OF 1933
                         POST-EFFECTIVE AMENDMENT NO. 11
                                          

                                     and/or

                             REGISTRATION STATEMENT
                                      UNDER
                       THE INVESTMENT COMPANY ACT OF 1940
                                         
                                Amendment No. 31
                                          


                          THE 59 WALL STREET FUND, INC.
               (Exact name of Registrant as specified in charter)

                 6 St. James Avenue, Boston, Massachusetts 02116
               (Address of Principal Executive Offices) (Zip Code)

        Registrant's Telephone Number, Including Area Code: (617)423-0800

PHILIP W. COOLIDGE                       Copy to: JOHN E. BAUMGARDNER, JR., ESQ.
6 St. James Avenue                                Sullivan & Cromwell
Boston, Massachusetts 02116                       125 Broad Street
Name and Address of Agent for Service)            New York, New York 10004

It is proposed that this filing will become effective (check
appropriate box)

   
[X] immediately upon filing pursuant to pursuant to paragraph (b) 
[ ] on (date)  pursuant  to  paragraph  (b) 
[ ] 60 days  after  filing  pursuant  to paragraph (a) (i) 
[ ] on (date)  pursuant to paragraph  (a)(i) 
[ ] 75 days after filing pursuant to paragraph (a)(ii) 
[ ] on (date) pursuant to paragraph (a)(ii) of rule 485.

If appropriate, check the following box:

[ ]  this  post-effective  amendment  designates  a  new  effective  date  for a
     previously filed post-effective amendment.

The U.S. Mid-Cap Portfolio has also executed this Registration Statement.

Registrant  has  registered an  indefinite  number of its shares of common stock
pursuant to Rule 24f-2  under the  Investment  Company  Act of 1940.  Registrant
filed the Notice  required by Rule 24f-2 on December 27, 1996, for  Registrant's
fiscal year ended October 31, 1996.
    



===============================================================================
<PAGE>
                                EXPLANATORY NOTE



   
         This Amendment (the "Amendment") to the Registrant's Registration
Statement relates to the Prospectus of The 59 Wall Street Mid-Cap Fund, a series
of shares of the Registrant. This Amendment reflects responses to comments from
the Securities and Exchange Commission and includes additional financial
statements and exhibits pertaining to The 59 Wall Street Mid-Cap Fund, a series
of the Corporation.

         Three other series of shares of the Registrant, The 59 Wall Street 
Small Company Fund, The 59 Wall Street European Equity Fund and The 59 Wall 
Street Pacific Basin Equity Fund, are offered by the combined Prospectus that
is included in Part A of Amendment No. 27 to the Registrant's Registration 
Statement.

         Two other series of shares of the Registrant, The 59 Wall Street U.S.
Equity Fund and The 59 Wall Street Inflation-Indexed Securities Fund are 
offered by the Prospectus that is included in Part A of Amendment No. 28 to the 
Registrant's Registration Statement.

         Two other series of shares of the Registrant, The 59 Wall Street
International Equity Fund and The 59 Wall Street Emerging Markets Fund are
offered by the Prospectus that is included in Part A of Amendment No. 29 to the
Registrant's Registration Statement.

         This Amendment does not relate to, amend or otherwise affect the
above-referenced Prospectuses, which are incorporated herein by reference.
    
<PAGE>

WS5520E
PROSPECTUS

                         THE 59 WALL STREET MID-CAP FUND
                 6 St. James Avenue, Boston, Massachusetts 02116



     The 59 Wall Street Mid-Cap Fund is an open-end  investment company which is
a separate diversified  portfolio of The 59 Wall Street Fund, Inc. Shares of the
Fund are offered by this Prospectus.

      The  Fund  is  designed  to  enable   investors  to   participate  in  the
opportunities  available in the middle capitalization segment of the U.S. equity
market.  The  investment  objective  of the Fund is to  provide  investors  with
long-term  maximization of total return,  primarily through capital appreciation
from investments in equity securities of middle-sized companies. There can be no
assurance that the Fund's investment objective will be achieved.

      Investments  in the Fund are neither  insured nor  guaranteed  by the U.S.
Government. Shares of the Fund are not deposits or obligations of, or guaranteed
by, Brown Brothers Harriman & Co., and the shares are not insured by the Federal
Deposit Insurance Corporation or any other federal,  state or other governmental
agency.

      The Corporation  seeks to achieve the investment  objective of the Fund by
investing all of the Fund's assets in the U.S. Mid-Cap Portfolio,  a diversified
open-end investment company having the same investment objective as the Fund.

      Brown Brothers Harriman & Co. is the investment adviser to the Portfolio
and the administrator and shareholder servicing agent of the Fund. Shares of
the Fund are offered at net asset value without a sales charge.

   
      This Prospectus, which investors are advised to read and retain for future
reference,   sets  forth  concisely  the  information  about  the  Fund  that  a
prospective  investor  ought to know before  investing.  Additional  information
about the Fund has been filed with the Securities  and Exchange  Commission in a
Statement of Additional Information, dated November 3, 1997. This information is
incorporated  herein by reference and is available  without  charge upon request
from the Fund's  distributor,  59 Wall Street  Distributors,  Inc.,  6 St. James
Avenue, Boston, Massachusetts 02116.
    

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

   
                The date of this Prospectus is November 3, 1997.
    

<PAGE>

                                                 TABLE OF CONTENTS

                                                                      PAGE



Expense Table.........................................................3
Investment Objective and Policies.....................................4
Investment Restrictions...............................................8
Purchase of Shares....................................................9
Redemption of Shares..................................................10
Management of the Corporation and the Portfolio ......................12
Net Asset Value.......................................................18
Dividends and Distributions...........................................19
Taxes ................................................................19
Description of Shares ................................................21
Additional Information................................................23
 Appendix.............................................................25




                                           TERMS USED IN THIS PROSPECTUS

Corporation ........................       The 59 Wall Street Fund,
                                             Inc.
Fund................................       The 59 Wall Street Mid-Cap Fund
Portfolio ..........................       U.S. Mid-Cap Portfolio
Investment Adviser..................       Brown Brothers Harriman & Co.
Administrator of the
     Corporation....................       Brown Brothers Harriman & Co.
Administrator of the
     Portfolio......................       Brown Brothers Harriman Trust
                                             Company(Cayman) Limited
Subadministrator of the
     Corporation ...................       59 Wall Street Administrators, Inc.
                                             ("59 Wall Street Administrators")
Subadministrator of the
     Portfolio......................       Signature Financial Group (Cayman)
                                             Limited ("SFG-Cayman")
Distributor ........................       59 Wall Street Distributors, Inc.
                                             ("59 Wall Street Distributors")
1940 Act............................       The Investment Company Act of 1940,
                                             as amended

                                        2

<PAGE>

EXPENSE TABLE

      The following table provides (i) a summary of estimated  expenses relating
to purchases and sales of shares of the Fund, and the aggregate annual operating
expenses of the Fund and the Portfolio, as a percentage of average net assets of
the Fund,  and (ii) an example  illustrating  the dollar cost of such  estimated
expenses on a $1,000  investment in the Fund.  THE DIRECTORS OF THE  CORPORATION
BELIEVE THAT THE AGGREGATE PER SHARE EXPENSES OF THE FUND AND THE PORTFOLIO WILL
BE LESS THAN OR  APPROXIMATELY  EQUAL TO THE EXPENSES WHICH THE FUND WOULD INCUR
IF THE CORPORATION  RETAINED THE SERVICES OF AN INVESTMENT  ADVISER ON BEHALF OF
THE FUND  AND THE  ASSETS  OF THE FUND  WERE  INVESTED  DIRECTLY  IN THE TYPE OF
SECURITIES BEING HELD BY THE PORTFOLIO.

                        SHAREHOLDER TRANSACTION EXPENSES
  Sales Load Imposed on Purchases..................................   None
  Sales Load Imposed on Reinvested Dividends.......................   None
  Deferred Sales Load..............................................   None
  Redemption Fee...................................................   None

                         ANNUAL FUND OPERATING EXPENSES
                     (as a percentage of average net assets)
  Investment Advisory Fee.............................                0.65%
  12b-1 Fee...........................................                None
  Other Expenses
   
    Administration Fee ...............................      0.160%
    Shareholder Servicing/Eligible Institution Fee....      0.250%
    Expense Payment Fee ..............................    0.115%
    Other Expenses....................................     0.075%      0.60%
                                                          ------       ---- 
    

  Total Fund Operating Expenses.......................                1.25%
                                                                      ====


EXAMPLE                                                      
- -------                                                     

A  shareholder  of the  Fund  would  pay  the  following  expenses  on a  $1,000
investment, assuming (1) 5% annual return, and (2) redemption at the
   
end of each time period: ..........              1 YEAR            3 YEARS  
                                                  $12.73            $39.65
    


         THE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
EXPENSES. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN. In connection
with the  Example,  please  note that $1,000 is  currently  less than the Fund's
minimum  purchase  requirement.  "Other  Expenses"  have been  estimated for the
current  fiscal  year.  The  purpose  of this  table is to assist  investors  in
understanding  the various costs and expenses that shareholders of the Fund bear
directly or indirectly.
    
         Under an expense  payment  agreement,  Brown  Brothers  Harriman  Trust
Company (Cayman) Limited pays the Portfolio's expenses,  other than fees paid to
Brown Brothers Harriman & Co. under the Portfolio's Administration Agreement and
other than expenses  relating to the  organization of the Portfolio.  In return,
Brown Brothers  Harriman Trust Company  (Cayman) Limited receives a fee from the
Portfolio  such that after such payment the aggregate  expenses of the Portfolio
do not exceed an agreed upon annual rate,  currently  0.80% of the average daily
net assets of the Portfolio. If this expense payment agreement was not in place,
the total  Portfolio  operating  expenses  would be  expected to be 0.85% of the
average  annual net assets of the Portfolio,  the total Fund operating  expenses
would be  expected to be 1.30% and the  shareholder  expenses  reflected  in the
example  above  would be $13.24 and  $41.21,  respectively,  for the Fund.  (See
"Expense Payment Agreement".)
    

      For more  information  with  respect to the  expenses  of the Fund and the
Portfolio, see "Management of the Corporation and the Portfolio" herein.
                                      3
<PAGE>
INVESTMENT OBJECTIVE AND POLICIES

      The  investment  objective  of the Fund and the  Portfolio  is to  provide
investors with long-term maximization of total return, primarily through capital
appreciation from investments in equity securities of middle-sized companies.

      The  investment  objective of the Fund and the  Portfolio is a fundamental
policy and may be changed  only with the  approval of the holders of a "majority
of the outstanding  voting  securities" (as defined in the 1940 Act) of the Fund
or the  Portfolio,  as the case may be. (See  "Additional  Information"  in this
Prospectus.)  However,  the investment policies as described below which are the
same for the Fund  and the  Portfolio  are not  fundamental  and may be  changed
without such approval.

     The assets of the Portfolio under normal  circumstances  are fully invested
in equity  securities  of mid-sized  companies,  consisting  primarily of common
stocks listed on securities exchanges or traded in the  over-the-counter  market
in the  United  States.  Although  the  assets  of the  Portfolio  are  invested
primarily in common stocks, other securities with equity  characteristics may be
purchased,  including securities convertible into common stock, trust or limited
partnership interests, rights and warrants.

         The Portfolio  currently focuses on the  approximately  1,200 companies
which have a stock market  capitalization  between $800 million and $10 billion.
The common stocks of these companies  represent one-third of the market value of
U.S. equities and have a total market value of about $3.0 trillion. This segment
of the market was finally  given formal  recognition  in the summer of 1991 when
Standard & Poor's introduced the S&P Mid Cap 400 index. The investment community
has grown increasingly fond of this asset class ever since.

            MARKET CAPITALIZATION BREAKDOWN OF THE U.S. EQUITY MARKET
                              (as of June 30, 1997)

                                                Market Cap.         % of Total
SIZE                           # OF STOCKS      (IN BILLIONS)       MARKET CAP.

Large (over $10 billion)        169               $5,298              56.3%

Mid ($800 mm to $10 billion)   1,210              $3,080              32.7%

Small (less than $800 mm)      7,341              $1,038              11.0%

                  TOTALS       8,720              $9,416             100.0%


         The  Fund  uses  a  bottom-up  fundamental  investment  approach  which
concentrates on  high-quality  issues,  supplemented  by a technical  overlay to
achieve  incremental  returns  above  those  of the S&P Mid Cap 400  index.  Two
proprietary models (one growth-based and the other  value-oriented)  are used to
build a portfolio of roughly 100 stocks.  These models,  which were developed by
Brown Brothers Harriman & Co. and backtested extensively,  provide the Fund with
a very  disciplined  and consistent  stock selection  process.  The Growth model
emphasizes  earnings  growth and expanding  profitability  while the Value model
highlights stocks with low relative valuations that are exhibiting visible signs
of  operational  improvement.  Although the Fund is run with a growth bias,  the
portfolio  effectively  avoids  the  volatility  of any  single  style by always
maintaining  some value  exposure.  All stocks  from both models are ranked into
deciles based on composite scores, with only the top two deciles of either model
representing the purchase candidates.  Purchase candidates are then subjected to
inspection from a technical  perspective  which  emphasizes three key variables:
momentum,  money  flows and  volume  patterns.  Stocks  are sold  either  when a
deterioration  in their  fundamental  ranking  occurs  and/or  when they  appear
vulnerable from a technical perspective.

                                  RISK FACTORS

         Investing in equity securities of middle-sized companies involves risks
not  typically  associated  with  investing in  comparable  securities  of large
companies.  Assets of the  Portfolio  are invested in  companies  which may have
narrow product lines and limited financial and managerial  resources.  Since the
market for mid cap equities is often  characterized  by less liquidity than that
for large cap equities,  the Portfolio's  investments can experience  unexpected
sharp  declines in their  market  prices.  Therefore,  shares of the Fund may be
subject to greater  declines in value than shares of equity  funds  investing in
the equity securities of larger companies.
                                        4
<PAGE>
                               HEDGING STRATEGIES
   
         Subject  to  applicable  laws and  regulations  and  solely  as a hedge
against  changes in the  market  value of  portfolio  securities  or  securities
intended to be purchased, put and call options on stock indexes may be purchased
and futures  contracts on stock  indexes may be entered  into for the  Portfolio
(See Appendix on page 25 for more detail.)
    
                               PORTFOLIO BROKERAGE
   
         Utilization of the Investment Adviser's proprietary quantitative models
for  the  selection  of  portfolio   securities,   and  the  resulting  periodic
rebalancing of portfolio holdings,  may cause turnover in the Portfolio which is
relatively high compared to more traditionally  managed  portfolios.  Securities
are  not  traded  for  short-term  profits  but,  when  circumstances   warrant,
securities  are sold  without  regard to the length of time held.  A 100% annual
turnover rate would occur, for example, if all portfolio  securities  (excluding
short-term  obligations)  were  replaced  once in a period of one year.  For the
fiscal year ending October 31, 1998 the portfolio turnover rate of the Portfolio
is expected to be []%. The amount of brokerage commissions and taxes on realized
capital  gains to be borne by the  shareholders  of the Fund tend to increase as
the level of portfolio activity increases.
    

         In effecting  securities  transactions the Investment  Adviser seeks to
obtain the best  price and  execution  of orders.  In  selecting  a broker,  the
Investment Adviser considers a number of factors including: the broker's ability
to execute orders without disturbing the market price; the broker's  reliability
for prompt,  accurate  confirmations  and on-time  delivery of  securities;  the
broker's  financial  condition  and  responsibility;   the  research  and  other
investment  information  provided by the broker;  and the  commissions  charged.
Accordingly,  the commissions charged by any such broker may be greater than the
amount  another firm might charge if the Investment  Adviser  determines in good
faith that the amount of such commissions is reasonable in relation to the value
of the brokerage services and research information provided by such broker.

         The  Investment  Adviser  may  direct  a  portion  of  the  Portfolio's
securities  transactions  to certain  unaffiliated  brokers  which in turn use a
portion  of the  commissions  they  receive  from  the  Portfolio  to pay  other
unaffiliated  service providers on behalf of the Portfolio for services provided
for which the Portfolio  would  otherwise be obligated to pay. Such  commissions
paid by the  Portfolio  are at the same rate paid to other brokers for effecting
similar transactions in listed equity securities.  Brown Brothers Harriman & Co.
acts as one of the  principal  brokers of the Portfolio in the purchase and sale
of portfolio  securities when, in the judgment of the Investment  Adviser,  that
firm will be able to obtain a price and execution at least as favorable as other
qualified  brokers.  As one of the principal  brokers for the  Portfolio,  Brown
Brothers Harriman & Co. receives brokerage commissions from the Portfolio.

         On those  occasions  when  Brown  Brothers  Harriman  & Co.  deems  the
purchase or sale of a security to be in the best  interests of the  Portfolio as
well as other customers,  Brown Brothers Harriman & Co., to the extent permitted
by applicable laws and regulations,  may, but is not obligated to, aggregate the
securities to be sold or purchased  for the  Portfolio  with those to be sold or
purchased for other customers in order to obtain best execution, including lower
brokerage  commissions,  if  appropriate.  In  such  event,  allocation  of  the
securities  so  purchased  or  sold  as well  as any  expenses  incurred  in the
transaction are made by Brown Brothers Harriman & Co. in the manner it considers
to be most  equitable  and  consistent  with its  fiduciary  obligations  to its
customers,  including the Portfolio.  In some  instances,  this procedure  might
adversely affect the Portfolio.

                           OTHER INVESTMENT TECHNIQUES

         SHORT-TERM INSTRUMENTS.  The assets of the Portfolio may be invested in
U.S. dollar denominated short-term instruments, including repurchase agreements,
obligations  of  the  U.S.  Government,   its  agencies  or   instrumentalities,
commercial  paper and bank obligations  (such as certificates of deposit,  fixed
time  deposits,  and bankers'  acceptances).  Cash is held for the  Portfolio in
demand deposit accounts with the Portfolio's custodian bank.

     U.S. GOVERNMENT SECURITIES.  The assets of the Portfolio may be invested in
securities  issued by the U.S.  Government,  its agencies or  instrumentalities.
These  securities  include  notes and bonds  issued by the U.S.  Treasury,  zero
coupon bonds and stripped principal and interest securities.

                                        5

<PAGE>

         RESTRICTED  SECURITIES.  Securities  that  have  legal  or  contractual
restrictions  on their resale may be acquired for the Portfolio.  The price paid
for these securities,  or received upon resale, may be lower than the price paid
or received for similar securities with a more liquid market.  Accordingly,  the
valuation of these securities  reflects any limitation on their liquidity.  (See
"Investment Restrictions".)

         LOANS OF PORTFOLIO SECURITIES.  Loans of portfolio securities up to 30%
of the total value of the Portfolio are  permitted.  These loans must be secured
continuously  by cash or equivalent  collateral or by an  irrevocable  letter of
credit  in favor of the  Portfolio  at least  equal at all  times to 100% of the
market  value  of  the  securities   loaned  plus  accrued  income.  By  lending
securities, the Portfolio's income can be increased by its continuing to receive
income  on the  loaned  securities  as well  as by the  opportunity  to  receive
interest on the collateral. Any appreciation or depreciation in the market price
of the borrowed  securities  which occurs  during the term of the loan inures to
the Portfolio and its investors.

         WHEN-ISSUED  AND  DELAYED  DELIVERY   SECURITIES.   Securities  may  be
purchased for the  Portfolio on a when-issued  or delayed  delivery  basis.  For
example,  delivery  and payment may take place a month or more after the date of
the  transaction.  The  purchase  price and the  interest  rate  payable  on the
securities,  if any,  are  fixed on the  transaction  date.  The  securities  so
purchased  are  subject  to  market  fluctuation  and no income  accrues  to the
Portfolio  until delivery and payment take place.  At the time the commitment to
purchase  securities on a when-issued  or delayed  delivery  basis is made,  the
transaction is recorded and thereafter the value of such securities is reflected
each day in  determining  the  Portfolio's  net asset value.  At the time of its
acquisition,  a when-issued or delayed  delivery  security may be valued at less
than the purchase price.  Commitments for such  when-issued or delayed  delivery
securities  are made only when there is an intention of actually  acquiring  the
securities.  On delivery dates for such  transactions,  such obligations are met
from  maturities or sales of  securities  and/or from cash flow. If the right to
acquire a when-issued or delayed  delivery  security is disposed of prior to its
acquisition, the Portfolio could, as with the disposition of any other portfolio
obligation,  incur a gain or loss  due to  market  fluctuation.  When-issued  or
delayed  delivery  commitments for the Portfolio may not be entered into if such
commitments exceed in the aggregate 15% of the market value of its total assets,
less  liabilities  other than the obligations  created by when-issued or delayed
delivery commitments.

   
         HISTORICAL   PERFORMANCE   INFORMATION.   As  permitted  by  applicable
interpretations  by the staff of the  Securities  and Exchange  Commission  (the
"SEC"),  historical  performance  information  for the  Fund for any  period  or
portion  thereof  prior  to its  commencement  of  operations  , is  that of the
Portfolio as adjusted to reflect all fees and expenses of the Fund  assuming the
existing expense payment arrangements were not in place.

         The  Portfolio  commenced  operations  on  November  3, 1997  after the
transfer  to it of all of  the  assets  of  BBH & Co.  Systematic  Mid-Cap  Fund
(Cayman) (the "Non-U.S. Fund") in exchange for an interest in the Portfolio. The
Non-U.S.  Fund has investment policies,  objective,  guidelines and restrictions
that are in all material  respects  equivalent to those of the Portfolio and the
assets of the  Portfolio  on November 3, 1997 were the same as the assets of the
Non-U.S.  Fund  immediately  prior to the  transfer.  While  the  Non-U.S.  Fund
continues to exist,  its assets consist solely of its interest in the Portfolio.
The Non-U.S. Fund is not a registered investment company since it is exempt from
registration  under the 1940 Act. As permitted by applicable  interpretations by
the SEC staff,  since in a practical  sense the Non-U.S.  Fund  constitutes  the
"predecessor"  of the Portfolio,  the performance of the Portfolio is calculated
for periods or portions  thereof  commencing prior to the transfer of the assets
of the  Non-U.S.  Fund to the  Portfolio  by  including  the total return of the
Non-U.S.Fund, with appropriate adjustments.
    

         As a result,  the quoted  performance  data for the Fund  includes  the
performance of the Non-U.S.  Fund for periods before the Registration  Statement
for the  Fund  became  effective.  As noted  above,  the  Non-U.S.  Fund was not
registered  under the 1940 Act and thus was not  subject to  certain  investment
restrictions  that are  imposed by the 1940 Act. If the  Non-U.S.  Fund had been
registered under the 1940 Act, the performance of the Non-U.S.
Fund might have been adversely affected.

   
                                        6

<PAGE>         
     Below is the historical return information for the Fund as of September 30,
1997:

Average annual total return:                 1 year     39.51%
                                             5 years    21.61%
                                             *          19.41%

Aggregate total return:                      1 year     39.51%
                                             5 years   165.90%
                                               *       165.21%

Past performance is no guarantee of future results.

         * From April 1, 1992, the commencement of operations of the Non-U.S.
Fund, to period end.
    

INVESTMENT RESTRICTIONS

         The Statement of Additional Information for the Fund includes a listing
of the specific investment  restrictions which govern the investment policies of
the Fund and the Portfolio.  Certain of these investment restrictions are deemed
fundamental policies and may be changed only with the approval of the holders of
a "majority of the outstanding  voting  securities" (as defined in the 1940 Act)
of the Fund or the Portfolio,  as the case may be (see "Additional  Information"
in this Prospectus). For instance, excluding the investment of all of the Fund's
assets in an open-end  investment company with substantially the same investment
objective,  policies and  restrictions as the Fund, not more than 10% of the net
assets of the Fund or the  Portfolio,  as the case may be,  may be  invested  in
securities that are subject to legal or contractual restrictions on resale.

         In  addition,  money is not  borrowed by the  Portfolio in an amount in
excess of 33 1/3% of its assets. It is intended that money will be borrowed only
from banks and only either to accommodate requests for the withdrawal of part or
all  of  an  interest  while  effecting  an  orderly  liquidation  of  portfolio
securities or to maintain liquidity in the event of an unanticipated  failure to
complete a portfolio security transaction or other similar situations.

         As a  non-fundamental  policy,  at least  65% of the value of the total
assets of the Portfolio is invested in the equity securities of companies with a
market  capitalization  of less than $6 billion and more than $800 million.  For
these  purposes,  equity  securities  are  defined as common  stock,  securities
convertible into common stock, trust or limited  partnership  interests,  rights
and warrants.

         The Fund is classified as "diversified" under the 1940 Act, which means
that at least 75% of its total assets is represented by cash;  securities issued
by the U.S. Government, its agencies or instrumentalities;  and other securities
limited  in respect  of any one  company to an amount no greater  than 5% of the
Fund's total assets and not more than 10% of the outstanding  voting  securities
of such company.

PURCHASE OF SHARES

         Shares of the Fund are offered on a continuous basis at their net asset
value without a sales charge.  The  Corporation  reserves the right to determine
the purchase orders for Fund shares that it will accept.  Shares of the Fund may
be purchased on any day the New York Stock Exchange is open for regular  trading
if the Corporation  receives the purchase order and acceptable  payment for such
order  prior to 4:00 P.M.,  New York  time.  Purchases  of Fund  shares are then
executed  at the net asset  value per share  next  determined  on that same day.
Shares are entitled to  dividends,  declared,  if any,  starting as of the first
business day following the day a purchase  order is executed on the books of the
Corporation.

         An investor who has an account with an Eligible  Institution  (see page
14) or a Financial Intermediary (see page 14) may place purchase orders for Fund
shares with the  Corporation  through  that  Eligible  Institution  or Financial
Intermediary  which  holds  such  shares in its name on behalf of that  customer
pursuant  to   arrangements   made  between  that  customer  and  that  Eligible
Institution  or  Financial  Intermediary.  Each  Eligible  Institution  and each
Financial  Intermediary  may  establish  and  amend  from time to time a minimum
initial and a minimum subsequent  purchase  requirement for its customers.  Each
Eligible Institution or Financial  Intermediary arranges payment for Fund shares
on behalf of its  customers.  A  transaction  fee may be charged by an  Eligible
Institution or a Financial Intermediary on the purchase of Fund shares.
                                        7

<PAGE>
         An investor who does not have an account  with an Eligible  Institution
or a Financial  Intermediary must place purchase orders for Fund shares with the
Corporation through the Fund's Shareholder Servicing Agent. Such an investor has
such shares held directly in the investor's name on the books of the Corporation
and is  responsible  for arranging for the payment of the purchase price of Fund
shares. All purchase orders for initial and subsequent purchases are executed at
the net asset value per share next determined after the Corporation's custodian,
State  Street  Bank and Trust  Company,  has  received  payment in the form of a
cashier's check drawn on a U.S. bank, a check certified by a U.S. bank or a wire
transfer.  Brown Brothers  Harriman & Co., as the Fund's  Shareholder  Servicing
Agent,  has established a minimum initial  purchase  requirement for the Fund of
$100,000 and a minimum subsequent purchase  requirement for the Fund of $25,000.
These minimum purchase requirements may be amended from time to time.

         Inquiries regarding the manner in which purchases of Fund shares may be
effected and other  matters  pertaining  to the Fund should be directed to Brown
Brothers Harriman & Co., the Fund's Shareholder Servicing Agent. (See back cover
for address and phone number.)

REDEMPTION OF SHARES

         A redemption  request must be received by the Corporation prior to 4:00
P.M.,  New York time on any day the New York Stock  Exchange is open for regular
trading.  Such a  redemption  is  executed at the net asset value per share next
determined on that same day. Shares continue to earn dividends declared, if any,
through the business  day a  redemption  request is executed on the books of the
Corporation.

         Shares held by an Eligible  Institution or a Financial  Intermediary on
behalf of a shareholder  must be redeemed  through that Eligible  Institution or
Financial  Intermediary  pursuant to arrangements  made between that shareholder
and  that  Eligible  Institution  or  Financial  Intermediary.   Proceeds  of  a
redemption are paid to that shareholder's  account at that Eligible  Institution
or  Financial  Intermediary.  A  transaction  fee may be charged by an  Eligible
Institution or a Financial Intermediary on the redemption of Fund shares.

         Shares held directly in the name of a  shareholder  on the books of the
Corporation may be redeemed by submitting a redemption  request in good order to
the Corporation through the Fund's Shareholder  Servicing Agent. (See back cover
for address and phone number.) Proceeds  resulting from such redemption are paid
by the Corporation directly to the shareholder in "available" funds generally on
the next business day after the redemption request is executed, and in any event
within seven days.

                         REDEMPTIONS BY THE CORPORATION

      The  Fund's  Shareholder  Servicing  Agent  (see page 14),  each  Eligible
Institution  and each  Financial  Intermediary  (see page 14) may  establish and
amend from time to time for their respective customers a minimum account
size.
   
If the value of a  shareholder's  holdings  in the Fund falls  below that amount
because of a redemption of shares,  the  shareholder's  remaining  shares may be
redeemed.  If such remaining  shares are to be redeemed,  the  shareholder is so
notified and is allowed 60 days to make an  additional  investment to enable the
shareholder to meet the minimum  requirement before the redemption is processed.
Brown Brothers  Harriman & Co., as the Fund's  Shareholder  Servicing Agent, has
established a minimum account size of $100,000.
    
                                        8

<PAGE>

                         FURTHER REDEMPTION INFORMATION

         In the event a shareholder  redeems all shares held in the Fund, future
purchases of shares of the Fund by such shareholder would be subject to the
Fund's minimum initial purchase requirements.

         The value of shares redeemed may be more or less than the shareholder's
cost depending on Fund performance  during the period the shareholder owned such
shares.  Redemptions  of shares are taxable  events on which a  shareholder  may
realize a gain or a loss.

     An  investor  should  be aware  that  redemptions  from the Fund may not be
processed  if  a  completed  account   application  with  a  certified  taxpayer
identification number has not been received.

     The  Corporation  has  reserved the right to pay the amount of a redemption
from the  Fund,  either  totally  or  partially,  by a  distribution  in kind of
securities (instead of cash) from the Fund. (See "Net Asset Value; Redemption in
Kind" in the Statement of Additional Information.)
                                       

         A shareholder's right to receive payment with respect to any redemption
may be suspended or the payment of the redemption  proceeds  postponed for up to
seven  days  and for  such  other  periods  as the  1940  Act may  permit.  (See
"Additional Information" in the Statement of Additional Information.)

                                
                MANAGEMENT OF THE CORPORATION AND THE PORTFOLIO

                        DIRECTORS, TRUSTEES AND OFFICERS

      The Corporation's Directors, in addition to supervising the actions of the
Administrator  of the Corporation and  Distributor,  as set forth below,  decide
upon matters of general policy with respect to the Corporation.  The Portfolio's
Trustees,  in addition to supervising the actions of the Portfolio's  Investment
Adviser and  Administrator,  as set forth below,  decide upon matters of general
policy with respect to the Portfolio.  The  Corporation's  Directors are not the
same individuals as the Portfolio's Trustees.

   
      Because  of the  services  rendered  to the  Portfolio  by the  Investment
Adviser  and  to  the  Corporation   and  the  Portfolio  by  their   respective
Administrators,  the  Corporation  and the Portfolio  require no employees,  and
their respective officers, other than the Chairmen, receive no compensation from
the Fund or the  Portfolio.  (See  "Directors,  Trustees  and  Officers"  in the
Statement of Additional Information.)
    

   The Directors of the Corporation are:

      J.V. Shields, Jr.
         Chairman and Chief Executive Officer of
           Shields & Company

      Eugene P. Beard
         Vice Chairman-Finance and Operations of
           The Interpublic Group of Companies

      David P. Feldman
   
         Retired, Chairman and Chief Executive Officer-AT&T
           Investment Management Corporation
    

                                        9

<PAGE>

      Alan G. Lowy
         Private Investor

      Arthur D. Miltenberger
         Vice President and Chief Financial Officer of
           Richard K. Mellon and Sons

   The Trustees of the Portfolio are:

      H.B. Alvord
         Retired, Former Treasurer and Tax Collector
           of Los Angeles County

      Richard L. Carpenter
         Retired, Director of Internal Investments of
           the Public School Employees' Retirement
           System

      Clifford A. Clark
         Retired, Former Senior Manager of Brown
           Brothers Harriman & Co.

      David M. Seitzman
   
          Retired, Physician with Seitzman, Shuman,
           Kwart and Phillips
    

                               INVESTMENT ADVISER

         The Investment  Adviser to the Portfolio is Brown  Brothers  Harriman &
Co., Private Bankers,  a New York limited  partnership  established in 1818. The
firm is subject to examination and regulation by the  Superintendent of Banks of
the State of New York and by the  Department of Banking of the  Commonwealth  of
Pennsylvania.  The firm is also subject to  supervision  and  examination by the
Commissioner of Banks of the Commonwealth of Massachusetts.

   
         Brown Brothers Harriman & Co. provides  investment advice and portfolio
management services to the Portfolio.  Subject to the general supervision of the
Portfolio's  Trustees,  Brown  Brothers  Harriman  & Co.  makes  the  day-to-day
investment  decisions,  places  the  purchase  and  sale  orders  for  portfolio
transactions,  and generally manages the Portfolio's investments. Brown Brothers
Harriman & Co.  provides a broad range of  investment  management  services  for
customers in the United  States and abroad.  At June 30, 1997 , it managed total
assets of approximately $25 billion.
    

     The  Portfolio is managed on a day-to-day  basis by a team of  individuals,
including Mr. Donald B. Murphy, Mr. John A. Nielsen and Mr. William M. Buchanan.
Mr.  Murphy  and Mr.  Nielsen  are the  partners  responsible  for  quantitative
investment  management at Brown Brothers  Harriman & Co. Mr. Murphy holds a B.A.
from Yale  University and an M.B.A.  from Columbia  University.  He joined Brown
Brothers  Harriman  & Co.  in  1966.  Mr.  Nielsen  holds a B.A.  from  Bucknell
University,  an M.B.A.  from Columbia  University  and is a Chartered  Financial
Analyst.  He joined Brown Brothers  Harriman & Co. in 1968. Mr. Buchanan holds a
B.A. from Duke University, an M.B.A. from New York University and is a Chartered
Financial Analyst. He joined Brown Brothers Harriman & Co. in 1991.

   
         As compensation for the services  rendered and related expenses such as
salaries of advisory  personnel borne by Brown Brothers Harriman & Co. under the
Investment Advisory  Agreement,  Brown Brothers Harriman & Co. receives from the
Portfolio an annual fee,  computed daily and payable monthly,  equal to 0.65% of
the average daily net assets of the Portfolio. Brown Brothers Harriman & Co. and
its affiliates  also receive annual  administration  fees from the Fund equal to
0.125% of the average daily net assets of the Fund , annual  administration fees
from the Portfolio equal to 0.035% of the average daily assets of the Portfolio,
and an annual shareholder servicing/eligible institution fee from the Fund equal
to 0.25% of the average daily net assets of the Fund represented by shares owned
by  customers  during the period for whom Brown  Brothers  Harriman & Co. is the
holder or agent of record.
    
                                       10
<PAGE>

     The investment  advisory  services of Brown Brothers  Harriman & Co. to the
Portfolio  are  not  exclusive  under  the  terms  of  the  Investment  Advisory
Agreement.  Brown Brothers  Harriman & Co. is free to and does render investment
advisory services to others, including other registered investment companies.

         Pursuant  to a license  agreement  between  the  Corporation  and Brown
Brothers  Harriman & Co. dated  September 5, 1990, as amended as of December 15,
1993, the  Corporation  may use in its name "59 Wall Street",  a service mark of
Brown Brothers  Harriman & Co. The agreement may be terminated by Brown Brothers
Harriman  & Co. at any time upon  written  notice  to the  Corporation  upon the
expiration or earlier  termination of any investment  advisory agreement between
Brown Brothers  Harriman & Co. and the Corporation or any investment  company in
which a series of the Corporation invests all of its assets.  Termination of the
agreement  would require the  Corporation to change its name and the name of the
Fund to eliminate all reference to "59 Wall Street".

         Pursuant to license  agreements  between Brown Brothers  Harriman & Co.
and each of 59 Wall Street  Administrators and 59 Wall Street Distributors (each
a "Licensee"),  dated June 22, 1993 and June 8, 1990, respectively,  and amended
August 19, 1997,  each Licensee may continue to use in its name "59 Wall Street"
only if Brown Brothers Harriman & Co. does not terminate the respective  license
agreement,  which would require the Licensee to change its name to eliminate all
reference to "59 Wall Street".

                                 ADMINISTRATORS

     Brown Brothers  Harriman & Co. acts as Administrator of the Corporation and
Brown Brothers  Harriman Trust Company (Cayman) Limited acts as Administrator of
the   Portfolio.   (See   "Administrators"   in  the   Statement  of  Additional
Information.)  Brown  Brothers  Harriman  Trust  Company  (Cayman)  Limited is a
wholly-owned  subsidiary of Brown  Brothers  Harriman Trust Company of New York,
which is a wholly-owned subsidiary of Brown Brothers Harriman & Co.

         In its capacity as  Administrator  of the  Corporation,  Brown Brothers
Harriman & Co.  administers all aspects of the Corporation's  operations subject
to the  supervision  of the  Corporation's  Directors  except as set forth below
under  "Distributor".  In connection with its  responsibilities as Administrator
and at  its  own  expense,  Brown  Brothers  Harriman  & Co.  (i)  provides  the
Corporation with the services of persons  competent to perform such supervisory,
administrative  and  clerical  functions  as are  necessary  in order to provide
effective  administration  of the  Corporation,  including  the  maintenance  of
certain books and records;  (ii) oversees the performance of administrative  and
professional  services  to the  Corporation  by  others,  including  the  Fund's
Transfer and Dividend  Disbursing  Agent;  (iii) provides the  Corporation  with
adequate office space and communications and other facilities; and (iv) prepares
and/or arranges for the preparation, but does not pay for, the periodic updating
of the  Corporation's  registration  statement  and the Fund's  prospectus,  the
printing of such  documents for the purpose of filings with the  Securities  and
Exchange Commission and state securities administrators,  and the preparation of
tax returns  for the Fund and reports to  shareholders  and the  Securities  and
Exchange Commission.
                                       11
<PAGE>

         For the services rendered to the Corporation and related expenses borne
by Brown Brothers  Harriman & Co., as Administrator  of the  Corporation,  Brown
Brothers Harriman & Co. receives from the Fund an annual fee, computed daily and
payable monthly, equal to 0.125% of the Fund's average daily net assets.

     Brown Brothers Harriman Trust Company (Cayman) Limited,  in its capacity as
Administrator  of the  Portfolio,  administers  all  aspects of the  Portfolio's
operations subject to the supervision of the Portfolio's  Trustees except as set
forth above under "Investment  Adviser". In connection with its responsibilities
as  Administrator  for the  Portfolio  and at its own  expense,  Brown  Brothers
Harriman  Trust Company  (Cayman)  Limited (i) provides the  Portfolio  with the
services of persons  competent to perform such supervisory,  administrative  and
clerical functions as are necessary in order to provide effective administration
of the  Portfolio,  including  the  maintenance  of certain  books and  records,
receiving and processing  requests for increases and decreases in the beneficial
interests in the Portfolio,  notification to the Investment Adviser of available
funds for investment, reconciliation of account information and balances between
the Custodian and the Investment  Adviser,  and  processing,  investigating  and
responding to investor inquiries; (ii) oversees the performance ofadministrative
and professional  services to the Portfolio by others,  including the Custodian;
(iii) provides the Portfolio with adequate office space and  communications  and
other  facilities;  and (iv) prepares and/or arranges for the  preparation,  but
does  not  pay  for,  the  periodic  updating  of the  Portfolio's  registration
statement  for filing  with the  Securities  and  Exchange  Commission,  and the
preparation  of tax returns for the  Portfolio  and reports to investors and the
Securities and Exchange Commission.

         For the services  rendered to the Portfolio and related  expenses borne
by Brown Brothers  Harriman Trust Company  (Cayman)  Limited as Administrator of
the Portfolio,  Brown Brothers  Harriman Trust Company (Cayman) Limited receives
from the Portfolio an annual fee,  computed daily and payable monthly,  equal to
0.035% of the Portfolio's average daily net assets.

         Pursuant to a Subadministrative  Services Agreement with Brown Brothers
Harriman & Co., 59 Wall Street  Administrators  performs such  subadministrative
duties for the  Corporation as are from time to time agreed upon by the parties.
The offices of 59 Wall Street  Administrators are located at 6 St. James Avenue,
Boston,  Massachusetts  02116. 59 Wall Street  Administrators  is a wholly-owned
subsidiary of Signature  Financial Group,  Inc.  ("SFG").  SFG is not affiliated
with   Brown   Brothers   Harriman   &  Co.  59  Wall   Street   Administrators'
subadministrative  duties may include providing equipment and clerical personnel
necessary for maintaining the organization of the Corporation,  participation in
the  preparation of documents  required for compliance by the  Corporation  with
applicable laws and regulations,  preparation of certain documents in connection
with  meetings of  Directors  and  shareholders  of the  Corporation,  and other
functions that would  otherwise be performed by the  Administrator  as set forth
above.  For  performing  such   subadministrative   services,   59  Wall  Street
Administrators  receives such  compensation as is from time to time agreed upon,
but not in excess of the amount paid to the Administrator from the Fund.

     Pursuant to a  Subadministrative  Services  Agreement  with Brown  Brothers
Harriman   Trust   Company   (Cayman)   Limited,    SFG-Cayman   performs   such
subadministrative  duties for the Portfolio as are from time to time agreed upon
by the parties.  The offices of SFG-Cayman  are located at  Elizabethan  Square,
George Town, Grand Cayman BWI.  SFG-Cayman is a wholly-owned  subsidiary of SFG.
SFG-Cayman's  subadministrative  duties  may  include  providing  equipment  and
clerical personnel  necessary for maintaining the organization of the Portfolio,
participation  in the  preparation  of documents  required for compliance by the
Portfolio with applicable laws and regulations, preparation of certain documents
in connection  with meetings of Trustees of and investors in the Portfolio,  and
other  functions that would otherwise be performed by the  Administrator  of the
Portfolio as set forth above.  For performing such  subadministrative  services,
SFG-Cayman  receives such  compensation as is from time to time agreed upon, but
not in excess of the amount paid to the Administrator from the Portfolio.

                           SHAREHOLDER SERVICING AGENT

     The  Corporation  has entered into a shareholder  servicing  agreement with
Brown Brothers  Harriman & Co. pursuant to which Brown Brothers  Harriman & Co.,
as agent for the Fund, among other things:  answers  inquiries from shareholders
of and prospective  investors in the Fund regarding  account status and history,
the manner in which purchases and redemptions of Fund shares may be effected and
certain  other  matters  pertaining  to the Fund;  assists  shareholders  of and
prospective  investors in the Fund in designating and changing dividend options,
account designations and addresses;  and provides such other related services as
the  Corporation  or a shareholder  of or  prospective  investor in the Fund may
reasonably request.  For these services,  Brown Brothers Harriman & Co. receives
from the Fund an annual fee, computed daily and payable monthly,  equal to 0.25%
of the average daily net assets of the Fund  represented  by shares owned during
the period for which  payment  was being made by  shareholders  who did not hold
their shares with an Eligible Institution.
                                       12

<PAGE>
                            FINANCIAL INTERMEDIARIES

         From time to time, the Fund's  Shareholder  Servicing Agent enters into
contracts with banks,  brokers and other  financial  intermediaries  ("Financial
Intermediaries")  pursuant to which a customer of the Financial Intermediary may
place purchase orders for Fund shares through that Financial  Intermediary which
holds  such  shares  in its name on behalf of that  customer.  Pursuant  to such
contract,  each Financial  Intermediary as agent with respect to shareholders of
and  prospective  investors  in the Fund  who are  customers  of that  Financial
Intermediary, among other things: provides necessary personnel and facilities to
establish and maintain certain  shareholder  accounts and records enabling it to
hold,  as agent,  its  customers'  shares in its name or its nominee name on the
shareholder  records of the  Corporation;  assists in  processing  purchase  and
redemption  transactions;  arranges  for the  wiring  of  funds;  transmits  and
receives funds in connection  with customer  orders to purchase or redeem shares
of the Fund;  provides periodic  statements showing a customer's account balance
and, to the extent  practicable,  integrates such  information  with information
concerning other customer  transactions  otherwise  effected with or through it;
furnishes,  either  separately or on an integrated basis with other reports sent
to a customer,  monthly and annual statements and confirmations of all purchases
and  redemptions  of  Fund  shares  in a  customer's  account;  transmits  proxy
statements,  annual reports,  updated prospectuses and other communications from
the Corporation to its customers;  and receives,  tabulates and transmits to the
Corporation  proxies  executed  by its  customers  with  respect to  meetings of
shareholders  of the  Fund.  For  these  services,  the  Financial  Intermediary
receives such fees from the  Shareholder  Servicing  Agent as may be agreed upon
from time to time between the  Shareholder  Servicing  Agent and such  Financial
Intermediary.


                              ELIGIBLE INSTITUTIONS

   
         The Corporation enters into eligible institution agreements with banks,
brokers  and other  financial  institutions  pursuant  to which  each  financial
institution,  as agent for the  Corporation  with respect to shareholders of and
prospective  investors  in the  Fund  who  are  customers  with  that  financial
institution,  among other things: provides necessary personnel and facilities to
establish and maintain certain  shareholder  accounts and records enabling it to
hold,  as agent,  its  customers'  shares in its name or its nominee name on the
shareholder  records of the  Corporation;  assists in  processing  purchase  and
redemption  transactions;  arranges  for the  wiring  of  funds;  transmits  and
receives funds in connection  with customer  orders to purchase or redeem shares
of the Fund;  provides periodic  statements showing a customer's account balance
and, to the extent  practicable,  integrates such  information  with information
concerning other customer  transactions  otherwise  effected with or through it;
furnishes,  either  separately or on an integrated basis with other reports sent
to a customer,  monthly and annual statements and confirmations of all purchases
and  redemptions  of  Fund  shares  in a  customer's  account;  transmits  proxy
statements,  annual reports,  updated prospectuses and other communications from
the Corporation to its customers;  and receives,  tabulates and transmits to the
Corporation  proxies  executed  by its  customers  with  respect to  meetings of
shareholders  of the  Fund.  For  these  services,  each  financial  institution
receives from the Fund an annual fee, computed daily and payable monthly,  equal
to 0.25% of the average daily net assets of the Fund represented by shares owned
during the period for which  payment  was being made by  customers  for whom the
financial institution was the holder or agent of record.
    
                                       13

<PAGE>
                            EXPENSE PAYMENT AGREEMENT

   
         Under an agreement dated August 21, 1997, Brown Brothers Harriman Trust
Company  (Cayman)  Limited pays the expenses of the  Portfolio,  other than fees
paid to Brown Brothers Harriman & Co. under the Trust's Administration Agreement
and other than  expenses  relating  to the  organization  of the  Portfolio.  In
return,  Brown Brothers  Harriman Trust Company  (Cayman) Limited receives a fee
from the Portfolio  such that after such payment the  aggregate  expenses of the
Portfolio do not exceed an agreed upon annual rate, currently
 0.80% of the average daily net assets of the Portfolio.  Such fees are
computed daily and paid monthly.
    

                                   DISTRIBUTOR

     59 Wall Street Distributors acts as exclusive  Distributor of shares of the
Fund. Its office is located at 6 St. James Avenue, Boston,  Massachusetts 02116.
59 Wall Street  Distributors  is a  wholly-owned  subsidiary of SFG. SFG and its
affiliates currently provide  administration and distribution services for other
registered  investment  companies.  The  Corporation  pays for the  preparation,
printing and filing of copies of the  Corporation's  registration  statement and
the Fund's  prospectus as required under federal and state securities laws. (See
"Distributor" in the Statement of Additional Information.)

     59 Wall Street  Distributors  holds itself  available  to receive  purchase
orders for Fund shares.

                             CUSTODIAN, TRANSFER AND
                            DIVIDEND DISBURSING AGENT

         State   Street  Bank  and  Trust   Company   ("State   Street"  or  the
"Custodian"), 225 Franklin Street, P.O. Box 351, Boston, Massachusetts 02110, is
Custodian for the Fund and the  Portfolio  and Transfer and Dividend  Disbursing
Agent for the Fund.

         As Custodian  for the Fund,  it is  responsible  for holding the Fund's
assets  (i.e.,  cash and the Fund's  interest  in the  Portfolio)  pursuant to a
custodian  agreement with the  Corporation.  Cash is held for the Fund in demand
deposit   accounts  at  the  Custodian.   Subject  to  the  supervision  of  the
Administrator of the Corporation, the Custodian maintains the accounting records
for the Fund and each day computes the net asset value per share of the Fund. As
Transfer and Dividend  Disbursing  Agent it is responsible  for  maintaining the
books and records detailing the ownership of the Fund's shares.

         As Custodian for the Portfolio, it is responsible for maintaining books
and records of portfolio transactions and holding the Portfolio's securities and
cash pursuant to a custodian agreement with the Portfolio.  Cash is held for the
Portfolio  in  demand  deposit  accounts  at  the  Custodian.   Subject  to  the
supervision of the Administrator of the Portfolio,  the Custodian  maintains the
accounting  and  portfolio  transaction  records for the  Portfolio and each day
computes the net asset value and net income of the Portfolio.

                              INDEPENDENT AUDITORS

     Deloitte & Touche LLP, Boston,  Massachusetts are the independent  auditors
for the Fund. Deloitte & Touche,  Grand Cayman are the independent  auditors for
the Portfolio.

                                NET ASSET VALUE

         The Fund's net asset value per share is  determined  once daily at 4:00
P.M., New York time on each day the New York Stock Exchange is open for regular
trading.

         The  determination  of the Fund's net asset  value per share is made by
subtracting  from the value of the total assets of the Fund (i.e.,  the value of
its investment in the Portfolio and other assets) the amount of its  liabilities
and dividing the  difference by the number of shares of the Fund  outstanding at
the time the determination is made.

         The value of the Fund's  investment in the Portfolio is also determined
once daily at 4:00 P.M., New York time on each day the New York Stock Exchange
is open for regular trading.
                                       14

<PAGE>
         The  determination  of  the  value  of  the  Fund's  investment  in the
Portfolio  is made by  subtracting  from the  value of the  total  assets of the
Portfolio  the  amount  of  the  Portfolio's  liabilities  and  multiplying  the
difference by the  percentage,  effective  for that day,  which  represents  the
Fund's share of the aggregate beneficial interests in the Portfolio.

     Values of assets held by the Portfolio are determined on the basis of their
market or other fair value. (See  "Determination of Net Asset Value;  Redemption
in Kind" in the Statement of Additional Information.)

                          DIVIDENDS AND DISTRIBUTIONS

         Substantially  all of the Fund's net investment  income ("Net Income"),
including  its pro rata share of the  Portfolio's  net income and  realized  net
short-term  capital gains in excess of net long-term  capital losses is declared
and paid to Fund shareholders at least annually as a dividend, and substantially
all of the Fund's  pro rata  share of the  Portfolio's  realized  net  long-term
capital gains in excess of net short-term capital losses is declared and paid to
Fund  shareholders  on an  annual  basis as a  capital  gains  distribution.  An
additional  dividend  and/or capital gains  distribution  may be made in a given
year to the extent  necessary to avoid the  imposition of federal  excise tax on
the Fund. (See "Taxes"  below.)  Dividends and capital gains  distributions  are
payable to Fund shareholders of record on the record date.

         Unless  a   shareholder   whose   shares  are  held   directly  in  the
shareholder's  name on the books of the Corporation elects to have dividends and
capital  gains   distributions  paid  in  cash,   dividends  and  capital  gains
distributions  are  automatically  reinvested in additional  Fund shares without
reference  to the  minimum  subsequent  purchase  requirement.  The  Corporation
reserves the right to  discontinue,  alter or limit the  automatic  reinvestment
privilege at any time, but will provide shareholders prior written notice of any
such discontinuance, alteration or limitation.

         Each Eligible Institution and each Financial Intermediary may establish
its own policy with respect to the reinvestment of dividends and capital gains
distributions in additional Fund shares.

                                     TAXES

         Each year, the  Corporation  intends to qualify the Fund and elect that
the Fund be treated  as a  separate  "regulated  investment  company"  under the
Internal Revenue Code of 1986, as amended.  Accordingly, the Fund is not subject
to federal  income taxes on its Net Income and realized  net  long-term  capital
gains in excess of net  short-term  capital  losses that are  distributed to its
shareholders.  A 4%  non-deductible  excise  tax is  imposed  on the Fund to the
extent that certain  distribution  requirements  for the Fund for each  calendar
year are not met. The Corporation intends to continue to meet such requirements.
The Portfolio is also not required to pay any federal income or excise taxes.

     Dividends  are  taxable to  shareholders  of the Fund as  ordinary  income,
whether such  dividends are paid in cash or  reinvested  in  additional  shares.
Dividends  paid  from  the  Fund  may be  eligible  for  the  dividends-received
deduction  allowed to  corporate  shareholders  because  all or a portion of the
Portfolio's  net income may consist of dividends paid by domestic  corporations.
Capital gains  distributions  are taxable to shareholders  as long-term  capital
gains, whether paid in cash or reinvested in additional shares and regardless of
the length of time a particular shareholder has held Fund shares.

     Any dividend or capital gains  distribution  has the effect of reducing the
net asset value of Fund shares held by a  shareholder  by the same amount as the
dividend or capital gains distribution.  If the net asset value of the shares is
reduced  below a  shareholder's  cost as a result of such a dividend  or capital
gains  distribution,  the  dividend  or  capital  gains  distribution,  although
constituting a return of invested capital,  would be taxable as described above.
Any gain or loss realized on the redemption of Fund shares by a shareholder  who
is not a dealer in  securities  is treated as long-term  capital gain or loss if
the shares have been held for more than one year,  and  otherwise as  short-term
capital  gain or loss.  However,  any loss  realized by a  shareholder  upon the
redemption of shares in the Fund held one year or less is treated as a long-term
capital loss to the extent of any long-term capital gains distributions received
by the shareholder with respect to such shares.

         Under U.S.  Treasury  regulations,  the  Corporation  and each Eligible
Institution  are required to withhold  and remit to the U.S.  Treasury a portion
(31%) of  dividends  and capital  gains  distributions  on the accounts of those
shareholders  who fail to  provide  a  correct  taxpayer  identification  number
(Social Security Number for individuals) or to make required certifications,  or
who have been notified by the Internal  Revenue Service that they are subject to
such withholdings.  Prospective investors should submit an IRS Form W-9 to avoid
such withholding.
                                       15
<PAGE>

                              STATE AND LOCAL TAXES

     The treatment of each Fund and its  shareholders in those states which have
income tax laws might differ from  treatment  under the federal income tax laws.
Distributions  to  shareholders  may be  subject to  additional  state and local
taxes.  Shareholders are urged to consult their tax advisors regarding any state
or local taxes.

                                FOREIGN INVESTORS

         The Fund is  designed  for  investors  who are either  citizens  of the
United  States or  aliens  subject  to United  States  income  tax.  Prospective
investors  who are not  citizens  of the  United  States  and who are not aliens
subject to United States income tax are subject to United States withholding tax
on the entire amount of all dividends.

                                OTHER INFORMATION

         Annual   notification   as  to  the  tax   status  of   capital   gains
distributions, if any, is provided to shareholders shortly after October 31, the
end of  the  Fund's  fiscal  year.  Additional  tax  information  is  mailed  to
shareholders in January.

         This tax discussion is based on the tax laws and  regulations in effect
on the date of this Prospectus, however such laws and regulations are subject to
change.  Shareholders  and prospective  investors are urged to consult their tax
advisors   regarding   specific   questions   relevant   to   their   particular
circumstances.

                             DESCRIPTION OF SHARES

         The Corporation is an open-end management  investment company organized
on July 16, 1990, as a corporation under the laws of the State of Maryland.  Its
offices are located at 6 St. James  Avenue,  Boston,  Massachusetts  02116;  its
telephone number is (617) 423-0800.

         The Articles of Incorporation currently permit the Corporation to issue
2,500,000,000  shares  of common  stock,  par value  $.001 per  share,  of which
25,000,000  shares  have been  classified  as  shares of the Fund.  The Board of
Directors of the  Corporation  may increase the number of shares the Corporation
is  authorized  to issue  without  the  approval of  shareholders.  The Board of
Directors of the Corporation also has the power to designate one or more series

                                       16

<PAGE>


     of shares of common  stock and to  classify  and  reclassify  any  unissued
shares  with  respect to such  series.  Currently  there are seven  such  series
inaddition to the Fund.

         Each share of the Fund represents an equal proportional interest in the
Fund with each other  share.  Upon  liquidation  of the Fund,  shareholders  are
entitled  to  share  pro  rata in the  net  assets  of the  Fund  available  for
distribution to shareholders.

         Shareholders  of the Fund are  entitled  to a full  vote for each  full
share held and to a fractional vote for fractional  shares. The voting rights of
shareholders are not cumulative. Shares have no preemptive or conversion
rights.
The rights of redemption are described  elsewhere herein.  Shares are fully paid
and nonassessable by the Corporation. It is the intention of the Corporation not
to hold meetings of shareholders  annually. The Directors of the Corporation may
call meetings of shareholders  for action by shareholder vote as may be required
by the 1940 Act or as may be  permitted  by the  Articles  of  Incorporation  or
By-Laws.  Shareholders have under certain  circumstances (e.g., upon application
and  submission  of  certain  specified   documents  to  the  Directors  of  the
Corporation by a specified number of shareholders) the right to communicate with
other  shareholders in connection with requesting a meeting of shareholders  for
the purpose of removing one or more Directors of the  Corporation.  Shareholders
also have the right to remove one or more Directors of the Corporation without a
meeting by a declaration in writing by a specified number of shareholders.

         The By-Laws of the  Corporation  provide that the presence in person or
by proxy of the  holders  of  record  of one  third  of the  shares  of the Fund
outstanding  and  entitled  to vote  thereat  shall  constitute  a quorum at all
meetings of Fund  shareholders,  except as otherwise required by applicable law.
The By-Laws further provide that all questions shall be decided by a majority of
the  votes  cast at any such  meeting  at which a quorum is  present,  except as
otherwise required by applicable law.

         The  Corporation's  Articles  of  Incorporation  provide  that,  at any
meeting of  shareholders  of the Fund,  each Eligible  Institution  may vote any
shares as to which that  Eligible  Institution  is the agent of record and which
are  otherwise  not   represented   in  person  or  by  proxy  at  the  meeting,
proportionately  in  accordance  with the votes  cast by  holders  of all shares
otherwise  represented  at the  meeting  in person or by proxy as to which  that
Eligible  Institution is the agent of record. Any shares so voted by an Eligible
Institution  are  deemed  represented  at the  meeting  for  purposes  of quorum
requirements.

         The Portfolio,  in which all of the assets of the Fund are invested, is
organized  as a trust  under the law of the State of New York.  The  Portfolio's
Declaration of Trust provides that the Fund and other entities  investing in the
Portfolio (e.g., other investment companies, insurance company separate accounts
and common and  commingled  trust funds) are each liable for all  obligations of
the Portfolio. However, the risk of the Fund incurring financial loss on account
of such liability is limited to circumstances in which both inadequate insurance
existed  and  the  Portfolio   itself  was  unable  to  meet  its   obligations.
Accordingly,  the Directors of the Corporation believe that neither the Fund nor
its shareholders  will be adversely  affected by reason of the investment of all
of the assets of the Fund in the Portfolio.

         Each  investor  in the  Portfolio,  including  the Fund,  may add to or
reduce its  investment in the Portfolio on each day the New York Stock  Exchange
is open for regular  trading.  At 4:00 P.M., New York time on each such business
day,  the value of each  investor's  beneficial  interest  in the  Portfolio  is
determined  by  multiplying  the  net  asset  value  of  the  Portfolio  by  the
percentage,  effective for that day, which  represents that investor's  share of
the  aggregate  beneficial   interests  in  the  Portfolio.   Any  additions  or
withdrawals,  which are to be  effected  on that  day,  are then  effected.  The
investor's  percentage of the aggregate beneficial interests in the Portfolio is
then  recomputed  as the  percentage  equal to the fraction (i) the numerator of
which is the value of such  investor's  investment  in the  Portfolio as of 4:00
P.M., New York time on such day plus or minus, as the case may be, the amount of
any additions to or withdrawals from the investor's  investment in the Portfolio
effected on such day, and (ii) the  denominator  of which is the  aggregate  net
asset value of the Portfolio as of 4:00 P.M.,  New York time on such day plus or
minus,  as the case may be, the amount of the net  additions  to or  withdrawals
from  the  aggregate  investments  in  the  Portfolio  by all  investors  in the
Portfolio.  The  percentage so determined is then applied to determine the value
of the  investor's  interest in the Portfolio as of 4:00 P.M.,  New York time on
the following business day of the Portfolio.

                                       17

<PAGE>
         Whenever the Corporation is requested to vote on a matter pertaining to
the  Portfolio,  the  Corporation  will vote its  shares  without  a meeting  of
shareholders  of the Fund if the  proposal is one, if which made with respect to
the Fund,  would not require the vote of  shareholders  of the Fund,  as long as
such  action  is   permissible   under   applicable   statutory  and  regulatory
requirements.  For all other matters requiring a vote, the Corporation will hold
a meeting of  shareholders  of the Fund and, at the meeting of  investors in the
Portfolio,  the Corporation will cast all of its votes in the same proportion as
the votes of the Fund's shareholders even if all Fund shareholders did not vote.
Even if the  Corporation  votes all its shares at the Portfolio  meeting,  other
investors  with a  greater  pro  rata  ownership  in the  Portfolio  could  have
effective voting control of the operations of the Portfolio.

                             ADDITIONAL INFORMATION

         As used in this  Prospectus,  the  term  "majority  of the  outstanding
voting  securities" (as defined in the 1940 Act) currently means the vote of (i)
67% or more of the outstanding  voting securities  present at a meeting,  if the
holders of more than 50% of the  outstanding  voting  securities  are present in
person or represented by proxy; or (ii) more than 50% of the outstanding  voting
securities, whichever is less.

         Fund shareholders  receive  semi-annual  reports  containing  unaudited
financial  statements and annual reports containing financial statements audited
by independent auditors. The annual report also contains performance information
and is made available to investors upon request and without charge.

         Other  mutual  funds  or  institutional  investors  may  invest  in the
Portfolio on the same terms and  conditions  as the Fund.  However,  these other
investors may have different  sales  commissions  and other  operating  expenses
which  may  generate  different  aggregate   performance  results.   Information
concerning  other  investors in the Portfolio is available  from Brown  Brothers
Harriman & Co. (See the back cover for the address and phone number.)

         The Corporation may withdraw the Fund's  investment in the Portfolio as
a result of certain changes in the Portfolio's investment objective,

policies  or  restrictions  or if the  Board  of  Directors  of the  Corporation
determines that it is otherwise in the best interests of the Fund to do so. Upon
any such  withdrawal,  the Board of Directors of the Corporation  would consider
what action might be taken, including the investment of all of the assets of the
Fund in another  pooled  investment  entity or the  retaining  of an  investment
adviser to manage the Fund's assets in accordance  with the investment  policies
of the  Portfolio  (See  "Investment  Objective and Policies" on page 5). In the
event the Directors of the  Corporation  were unable to accomplish  either,  the
Directors will determine the best course of action.

     A  confirmation  of each purchase and  redemption  transaction is issued on
execution of that transaction.

     The Fund's performance may be used from time to time in shareholder reports
or other  communications to shareholders or prospective  investors.  Performance
figures are based on historical earnings and are not intended to indicate future
performance.  Performance  information may include the Fund's investment results
and/or  comparisons of its investment results to various unmanaged indexes (such
as  Standard  & Poor's  Mid-Cap  400 Index and  Russell  Mid-Cap  Index)  and to
investments  for  which  reliable  performance  data is  available.  Performance
information may also include  comparisons to averages,  performance  rankings or
other information  prepared by recognized mutual fund statistical  services.  To
the extent that unmanaged indexes are so included,  the same indexes are used on
a consistent basis. The Fund's investment results as used in such communications
are calculated on a total rate of return basis in the manner set forth below.

         Period and average  annualized  "total rates of return" may be provided
in such  communications.  The "total rate of return" refers to the change in the
value of an  investment  in the Fund over a stated period based on any change in
net asset value per share and including the value of any shares purchasable with
any dividends or capital gains  distributions  during such period.  Period total
rates of return  may be  annualized.  An  annualized  total  rate of return is a
compounded  total rate of return  which  assumes  that the period  total rate of
return is generated  over a one year period,  and that all dividends and capital
gains  distributions  are  reinvested.  An  annualized  total  rate of return is
slightly higher than a period total rate of return if the period is shorter than
one year, because of the assumed reinvestment.

         This  Prospectus  omits  certain of the  information  contained  in the
Statement of Additional  Information and the  Registration  Statement filed with
the Securities and Exchange Commission.  The Statement of Additional Information
may be  obtained  from  59  Wall  Street  Distributors  without  charge  and the
Registration  Statement  may  be  obtained  from  the  Securities  and  Exchange
Commission  upon payment of the fee  prescribed by the Rules and  Regulations of
the Commission.

                                       19
<PAGE>

                         APPENDIX - HEDGING STRATEGIES

         OPTIONS ON STOCK INDEXES.  A stock index fluctuates with changes in the
market values of the stocks included in the index. Examples of stock indexes are
the Standard & Poor's 500 Stock Index  (Chicago  Board of Options  Exchange) and
the New York Stock Exchange  Composite  Index (New York Stock  Exchange) and the
Russell 2000 Index (Chicago Board of Options Exchange).

         Options  on stock  indexes  are  generally  similar to options on stock
except that the delivery requirements are different. Instead of giving the right
to take or make delivery of stock at a fixed price (strike price),  an option on
a stock index gives the holder the right to receive a cash  exercise  settlement
amount equal to (a) the amount,  if any, by which the strike price of the option
exceeds  (in the  case of a put) or is less  than  (in the  case of a call)  the
closing value of the underlying index on the date of exercise, multiplied by (b)
a fixed index  multiplier.  Receipt of this cash amount depends upon the closing
level of the stock index upon which the option is based being  greater  than, in
the case of a call, or less than, in the case of a put, the price of the option.
The amount of cash received will be equal to such difference between the closing
price of the index and the strike price of the option  expressed in U.S. dollars
times a specified multiple.

         The  effectiveness  of  purchasing  stock  index  options  as a hedging
technique depends upon the extent to which price movements in the portion of the
securities  portfolio  being hedged  correlate with price movements of the stock
index  selected.  The value of an index option depends upon future  movements in
the level of the overall stock market  measured by the  underlying  index before
the  expiration of the option.  Accordingly,  the  successful  use of options on
stock indexes is subject to the Investment  Adviser's  ability both to select an
appropriate  index and to predict future price  movements over the short term in
the overall stock market.  Brokerage costs are incurred in the purchase of stock
index options and the incorrect choice of an index or an incorrect assessment of
future price movements may result in poorer overall  performance than if a stock
index option had not been purchased.

         FUTURES CONTRACTS ON STOCK INDEXES. Subject to applicable laws and
regulations and solely as a hedge against changes in the market value of
portfolio securities or securities intended to be purchased, futures contracts
on stock indexes ("Futures Contracts") may be entered into for the Portfolio.

         In order to assure that the Portfolio is not deemed a "commodity  pool"
for purposes of the Commodity Exchange Act, regulations of the Commodity Futures
Trading  Commission  ("CFTC") require that the Portfolio enter into transactions
in futures  contracts  and options on futures  contracts  only (i) for bona fide
hedging  purposes  (as  defined in CFTC  regulations),  or (ii) for  non-hedging
purposes,  provided  that the  aggregate  initial  margin and  premiums  on such
non-hedging  positions  does  not  exceed  5% of the  liquidation  value  of the
Portfolio's assets.

         Futures  Contracts  provide  for the  making and  acceptance  of a cash
settlement based upon changes in the value of an index of stocks and are used to
hedge against  anticipated  future  changes in overall stock market prices which
otherwise  might either  adversely  affect the value of securities  held for the
Portfolio or adversely  affect the prices of securities which are intended to be
purchased at a later date. A Futures Contract may also be entered into to close
out or offset an existing futures position.
                                       20

<PAGE>

         In  general,   each  transaction  in  Futures  Contracts  involves  the
establishment of a position which is expected to move in a direction opposite to
that  of  the  investment  being  hedged.  If  these  hedging  transactions  are
successful,  the futures  positions taken would rise in value by an amount which
approximately  offsets the  decline in value of the  portion of the  Portfolio's
investments  that is being  hedged.  Should  general  market  prices  move in an
unexpected manner, the full anticipated benefits of Futures Contracts may not be
achieved or a loss may be realized.  There is also the risk of a potential  lack
of liquidity in the secondary market.

         The  effectiveness  of entering  into  Futures  Contracts  as a hedging
technique depends upon the extent of which price movements in the portion of the
securities  portfolio  being hedged  correlate with price movements of the stock
index selected. The value of a Futures Contract depends upon future movements in
the level of the overall stock market  measured by the  underlying  index before
the closing out of the Futures  Contract.  Accordingly,  the  successful  use of
Futures Contracts is subject to the Investment  Adviser's ability both to select
an appropriate  index and to predict future price  movements over the short term
in the overall  stock market.  The incorrect  choice of an index or an incorrect
assessment  of the future  price  movements  over the short term in the  overall
stock  market  may  result  in a poorer  overall  performance  than if a Futures
Contract had not been  purchased.  Brokerage costs are incurred in entering into
and maintaining Futures Contracts.

         When the  Portfolio  enters into a Futures  Contract,  it is  initially
required  to  deposit,  in a  segregated  account  in the  name  of  the  broker
performing in the  transaction,  an "initial  margin" of cash,  U.S.  Government
securities or other high grade liquid obligations equal to approximately 3% of

                                       19

<PAGE>

     the contract  amount.  Initial margin  requirements  are established by the
exchanges on which Futures  Contracts trade and may, from time to time,  change.
In addition,  brokers may establish  margin  deposit  requirements  in excess of
those  required by the  exchanges.  Initial  margin in futures  transactions  is
different from margin in securities transactions in that initial margin does not
involve the borrowing of funds by a broker's client but is, rather, a good faith
deposit  on the  Futures  Contract  which  will  be  returned  upon  the  proper
termination  of the Futures  Contract.  The margin  deposits  made are marked to
market daily and the  Portfolio may be required to make  subsequent  deposits of
cash or eligible securities called "variation margin", with its futures contract
clearing  broker,  which are  reflective  of price  fluctuations  in the Futures
Contract.

         Currently,  Futures Contracts can be purchased on stock indexes such as
the Standard & Poor's 500 Stock Index (Chicago Board of Options  Exchange),  the
Russell 2000 Index  (Chicago  Board of Options  Exchange) and the New York Stock
Exchange Composite Index (New York Stock Exchange).

         Exchanges may limit the amount by which the price of a Futures Contract
may move on any day.  If the price  moves  equal the daily  limit on  successive
days,  then it may prove  impossible to liquidate a futures  position  until the
daily limit moves have ceased.

     Another  risk which may arise in  employing  Futures  Contracts  to protect
against the price  volatility  of portfolio  securities is that the prices of an
index subject to Futures Contracts (and thereby the Futures Contract prices) may
correlate  imperfectly  with  the  behavior  of the  cash  prices  of  portfolio
securities.  Another such risk is that the price of the Futures Contract may not
move in tandem with the change in overall stock market prices  against which the
Portfolio seeks a hedge.

     

<PAGE>

The 59 Wall Street Fund, Inc.

Investment Adviser and Administrator
  of the Corporation
Brown Brothers Harriman & Co.
59 Wall Street
New York, New York  10005

Distributor
59 Wall Street Distributors, Inc.
6 St. James Avenue
Boston, Massachusetts  02116

Shareholder Servicing Agent
Brown Brothers Harriman & Co.
59 Wall Street
New York, New York  10005
(800) 625-5759

No  dealer,  salesman  or any  other  person  has  been  authorized  to give any
information or to make any  representations,  other than those contained in this
Prospectus and the Statement of Additional  Information,  in connection with the
offer contained in this Prospectus, and if given or made, such other information
or  representations  must not be relied  upon as having been  authorized  by the
Corporation or the Distributor.  This Prospectus does not constitute an offer by
the Corporation or by the  Distributor to sell or the  solicitation of any offer
to buy any of the securities offered hereby in any jurisdiction to any person to
whom it is unlawful for the Corporation or the Distributor to make such offer in
such jurisdiction.




















   
 ws5520E
    


                                                        22

<PAGE>

===============================================================================
                       STATEMENT OF ADDITIONAL INFORMATION

                         THE 59 WALL STREET MID-CAP FUND

                 6 ST. JAMES AVENUE, BOSTON, MASSACHUSETTS 02116


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

         The 59 Wall Street Mid-Cap Fund (the "Fund") is a separate portfolio of
The 59 Wall Street Fund,  Inc.  (the  "Corporation"),  a  management  investment
company  registered  under the  Investment  Company Act of 1940, as amended (the
"1940  Act").  The Fund is designed to enable  investors to  participate  in the
opportunities  available in the middle capitalization segment of the U.S. equity
market.  The  investment  objective  of the Fund is to  provide  investors  with
long-term  maximization of total return,  primarily through capital appreciation
from investments in equity securities of middle-sized companies. The Corporation
seeks to achieve the  investment  objective of the Fund by investing  all of the
Fund's assets in the U.S.  Mid-Cap  Portfolio (the  "Portfolio"),  a diversified
open-end  investment  company having the same investment  objective as the Fund.
There can be no assurance that the Fund's investment objective will be achieved.

   
         Brown  Brothers   Harriman  &  Co.  is  the  investment   adviser  (the
"Investment Adviser") of the Portfolio. This Statement of Additional Information
is not a prospectus and should be read in conjunction  with the Prospectus dated
November 3, 1997, a copy of which may be obtained  from the  Corporation  at the
address noted above.
    


                                TABLE OF CONTENTS
                                                               CROSS-REFERENCE
TO
                                                       PAGE         PAGE IN
PROSPECTUS

Investment Objective and Policies  .  .  .  .  .     2                    4
Investment Restrictions   .  .  .  .  .  .  .  .     4                    8
Directors, Trustees and Officers   .  .  .  .  .     6                   12
Investment Adviser  .  .  .  .  .  .  .  .  .  .     9                   13
Administrators.  .  .  .  .  .  .  .  .  .  .  .     11                  14
Distributor   .  .  .  .  .  .  .  .  .  .  .  .     11                  17
Net Asset Value; Redemption in Kind   .  .  .  .     12                  18
Computation of Performance   .  .  .  .  .  .  .     13                   7
Federal Taxes .  .  .  .  .  .  .  .  .  .  .  .     13                  19
Description of Shares  .  .  .  .  .  .  .  .  .     15                  21
Portfolio Transactions .  .  .  .  .  .  .  .  .     16                   5
Additional Information .  .  .  .  .  .  .  .  .     17                  23
Financial Statements   .  .  .  .  .  .  .  .  .




   
THE DATE OF THIS STATEMENT OF ADDITIONAL INFORMATION IS NOVEMBER
3, 1997.
    

                                                        

<PAGE>


INVESTMENT OBJECTIVE AND POLICIES

================================================================================
         The following  supplements the information  contained in the Prospectus
concerning the investment objective, policies and techniques of the Portfolio.
                               EQUITY INVESTMENTS

         Equity  investments  may or may  not pay  dividends  and may or may not
carry  voting  rights.  Common  stock  occupies  the most  junior  position in a
company's  capital  structure.  Convertible  securities  entitle  the  holder to
exchange  the  securities  for a  specified  number of  shares of common  stock,
usually of the same company, at specified prices within a certain period of time
and to receive  interest or dividends  until the holder  elects to convert.  The
provisions  of any  convertible  security  determine  its ranking in a company's
capital  structure.  In the case of  subordinated  convertible  debentures,  the
holder's  claims on assets and earnings are  subordinated to the claims of other
creditors, and are senior to the claims of preferred and common shareholders. In
the case of  convertible  preferred  stock,  the  holder's  claims on assets and
earnings are  subordinated  to the claims of all creditors and are senior to the
claims of common shareholders.


         OPTIONS ON STOCK.  For the sole purpose of reducing  risk, put and call
options on stocks may be  purchased  for the  Portfolio,  although  the  current
intention is not to do so in such a manner that more than 5% of the  Portfolio's
net assets would be at risk. A call option on a stock gives the purchaser of the
option the right to buy the underlying stock at a fixed price at any time during
the option period. Similarly, a put option gives the purchaser of the option the
right  to sell the  underlying  stock at a fixed  price at any time  during  the
option  period.  To  liquidate a put or call option  position,  a "closing  sale
transaction" may be made at any time prior to the expiration of the option which
involves selling the option previously purchased. Over-the-counter options ("OTC
Options")  purchased  are treated as not readily  marketable.  (See  "Investment
Restrictions").

         Covered call options may also be sold (written) on stocks,  although in
each case the current  intention  is not to do so. A call option is "covered" if
the writer owns the underlying security.

   
     OPTIONS ON STOCK INDEXES.  The  Corporation may terminate an option that it
has  written  prior  to its  expiration  by  entering  into a  closing  purchase
transaction  in which it purchases an option having the same terms as the option
written.  It is possible,  however,  that illiquidity in the options markets may
make it difficult from time to time for the Corporation to close out its written
option positions. Also, the securities exchanges have established limitations on
the number of options  which may be written by an investor or group of investors
acting in concert.  It is not contemplated  that these position limits will have
any adverse impact on the Corporation's portfolio strategies.
    

                                       2
<PAGE>




                          LOANS OF PORTFOLIO SECURITIES

         Securities  of the  Portfolio  may be loaned if such loans are  secured
continuously  by cash or  equivalent  liquid  securities  as collateral or by an
irrevocable  letter of credit in favor of the  Portfolio  at least  equal at all
times to 100% of the market value of the securities  loaned plus accrued income.
While such  securities  are on loan,  the borrower pays the Portfolio any income
accruing thereon, and cash collateral may be invested for the Portfolio, thereby
earning  additional  income.  All or any portion of interest  earned on invested
collateral may be paid to the borrower.  Loans are subject to termination by the
Portfolio in the normal  settlement  time,  currently  three business days after
notice, or by the borrower on one day's notice. Borrowed securities are returned
when the loan is terminated.  Any  appreciation  or  depreciation  in the market
price of the borrowed securities which occurs during the term of the loan inures
to the Portfolio and its investors.  Reasonable  finders' and custodial fees may
be paid in  connection  with a loan. In addition,  all facts and  circumstances,
including the  creditworthiness  of the  borrowing  financial  institution,  are
considered  before a loan is made  and no loan is made in  excess  of one  year.
There is the risk that a borrowed security may not be returned to the Portfolio.
Securities are not loaned to Brown  Brothers  Harriman & Co. or to any affiliate
of the Corporation, the Portfolio or Brown Brothers Harriman & Co.

                             SHORT-TERM INVESTMENTS

     Although it is intended that the assets of the  Portfolio  stay invested in
the securities  described above and in the Prospectus to the extent practical in
light  of  the  Portfolio's   investment   objective  and  long-term  investment
perspective,  assets of the Portfolio may be invested in short-term  instruments
to meet anticipated  expenses or for day-to-day  operating purposes and when, in
the Investment Adviser's opinion, it is advisable to adopt a temporary defensive
position because of unusual and adverse conditions affecting the equity markets.
In  addition,   when  the  Portfolio  experiences  large  cash  inflows  through
additional investments by its investors or the sale of portfolio securities, and
desirable  equity  securities that are consistent with its investment  objective
are  unavailable  in  sufficient  quantities,  assets may be held in  short-term
investments for a limited time pending  availability of such equity  securities.
Short-term instruments consist of U.S. dollar denominated: (i) securities issued
or guaranteed by the U.S. Government,  its agencies or  instrumentalities;  (ii)
commercial paper; (iii) bank obligations,  including negotiable  certificates of
deposit,  fixed time  deposits and  bankers'  acceptances;  and (iv)  repurchase
agreements. Time deposits with a maturity of more than seven days are treated as
not readily  marketable  (see  clause (vi) under the caption  "State and Federal
Restrictions").  At the time the  Portfolio's  assets are invested in commercial
paper,  bank  obligations  or  repurchase  agreements,   the  issuer  must  have
outstanding  debt  rated  A  or  higher  by  Moody's  Investors  Service,   Inc.
("Moody's")  or Standard & Poor's  Corporation  ("Standard  &  Poor's");  or the
issuer's parent  corporation,  if any, must have  outstanding  commercial  paper
rated Prime-1 by Moody's or A-1 by Standard & Poor's.

                                       3
<PAGE>


         REPURCHASE  AGREEMENTS.  Repurchase  agreements may be entered into for
the Portfolio only with a "primary dealer" (as designated by the Federal Reserve
Bank of New York) in U.S. Government  securities.  This is an agreement in which
the seller (the "Lender") of a security  agrees to repurchase from the Portfolio
the  security  sold at a mutually  agreed  upon time and price.  As such,  it is
viewed as the lending of money to the Lender.  The resale  price  normally is in
excess of the purchase price,  reflecting an agreed upon interest rate. The rate
is effective  for the period of time assets of the Portfolio are invested in the
agreement and is not related to the coupon rate on the underlying security.  The
period of these  repurchase  agreements is usually short,  from overnight to one
week. The securities which are subject to repurchase  agreements,  however,  may
have  maturity  dates in  excess  of one week  from  the  effective  date of the
repurchase  agreement.  The Portfolio  always receives as collateral  securities
which  are  issued  or  guaranteed  by the  U.S.  Government,  its  agencies  or
instrumentalities.  Collateral  is marked to the  market  daily and has a market
value  including  accrued  interest at least equal to 100% of the dollar  amount
invested  on  behalf of the  Portfolio  in each  agreement  along  with  accrued
interest.  Payment  for such  securities  is made for the  Portfolio  only  upon
physical  delivery or  evidence  of book entry  transfer to the account of State
Street Bank and Trust Company (the  "Custodian").  If the Lender  defaults,  the
Portfolio  might  incur a loss  if the  value  of the  collateral  securing  the
repurchase  agreement  declines and might incur  disposition costs in connection
with  liquidating the  collateral.  In addition,  if bankruptcy  proceedings are
commenced with respect to the Lender,  realization upon the collateral on behalf
of the  Portfolio  may  be  delayed  or  limited  in  certain  circumstances.  A
repurchase  agreement  with more than seven days to maturity  may not be entered
into for the Portfolio  if, as a result,  more than 10% of the  Portfolio's  net
assets would be invested in such  repurchase  agreement  together with any other
instrument  which is not readily  marketable  (see clause (vi) under the caption
"State and Federal Restrictions").

INVESTMENT RESTRICTIONS

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


         The Fund and the Portfolio are operated under the following  investment
restrictions which are deemed fundamental  policies and may be changed only with
the approval of the holders of a "majority of the outstanding voting securities"
(as  defined in the 1940 Act) of the Fund or the  Portfolio,  as the case may be
(see "Additional Information").

         Except that the  Corporation  may invest all of the Fund's assets in an
open-end  investment company with  substantially the same investment  objective,
policies  and   restrictions  as  the  Fund,   neither  the  Portfolio  nor  the
Corporation, with respect to the Fund, may:

         (1) borrow money or mortgage or hypothecate its assets,  except that in
an amount  not to exceed  1/3 of the  current  value of its net  assets,  it may
borrow money as a temporary measure for extraordinary or emergency purposes, and
except that it may pledge,  mortgage  or  hypothecate  not more than 1/3 of such
assets to secure such  borrowings  (it is  intended  that money will be borrowed
only from 
                                       4
<PAGE>

     banks and only either to  accommodate  requests for the  redemption of Fund
shares or the withdrawal of part or all of an interest in the Portfolio,  as the
case may be, while effecting an orderly  liquidation of portfolio  securities or
to maintain  liquidity  in the event of an  unanticipated  failure to complete a
portfolio  security  transaction  or other  similar  situations),  provided that
collateral arrangements with respect to options and futures,  including deposits
of initial deposit and variation  margin,  are not considered a pledge of assets
for purposes of this restriction and except that assets may be pledged to secure
letters of credit solely for the purpose of participating in a captive insurance
company sponsored by the Investment Company Institute;

         (2) purchase  any  security or evidence of interest  therein on margin,
except that such  short-term  credit as may be  necessary  for the  clearance of
purchases  and sales of  securities  may be obtained and except that deposits of
initial  deposit  and  variation  margin  may be made  in  connection  with  the
purchase, ownership, holding or sale of futures;

         (3) write,  purchase or sell any put or call option or any  combination
thereof,  provided  that this shall not  prevent  (i) the  purchase,  ownership,
holding or sale of warrants  where the grantor of the  warrants is the issuer of
the underlying securities, or (ii) the purchase,  ownership,  holding or sale of
futures and options, other than the writing of put options;

         (4) underwrite  securities issued by other persons except insofar as it
may  technically  be deemed an  underwriter  under the Securities Act of 1933 in
selling a portfolio security;

     (5) make loans to other  persons  except  (a)  through  the  lending of its
portfolio  securities and provided that any such loans not exceed 30% of its net
assets (taken at market value), (b) through the use of repurchase  agreements or
the purchase of  short-term  obligations  and provided that not more than 10% of
its net assets is invested in repurchase  agreements maturing in more than seven
days, or (c) by purchasing,  subject to the limitation in paragraph (6) below, a
portion of an issue of debt securities of types commonly  distributed  privately
to  financial  institutions,  for which  purposes  the  purchase  of  short-term
commercial  paper or a portion of an issue of debt securities  which are part of
an issue to the public shall not be considered the making of a loan;

         (6)  knowingly  invest  in  securities  which are  subject  to legal or
contractual restrictions on resale (other than repurchase agreements maturing in
not more than  seven  days) if,  as a result  thereof,  more than 10% of its net
assets  (taken at  market  value)  would be so  invested  (including  repurchase
agreements maturing in more than seven days);

         (7)  purchase  or  sell  real  estate  (including  limited  partnership
interests but excluding securities secured by real estate or interests therein),
interests  in oil, gas or mineral  leases,  commodities  or commodity  contracts
(except  futures and option  contracts) in the ordinary  course of business (the
freedom of action to hold and to sell real  estate  acquired  as a result of the
ownership of securities is reserved);

                                       5
<PAGE>

         (8) make short sales of securities or maintain a short position, unless
at all  times  when a short  position  is open it owns an equal  amount  of such
securities or securities  convertible into or  exchangeable,  without payment of
any further  consideration,  for  securities  of the same issue as, and equal in
amount to, the  securities  sold short,  and unless not more than 10% of its net
assets (taken at market value) is represented by such securities,  or securities
convertible into or exchangeable for such securities, at any one time (it is the
present  intention  of  management  to make such sales  only for the  purpose of
deferring  realization  of gain or loss for federal  income tax  purposes;  such
sales would not be made of securities subject to outstanding options);

         (9) concentrate its investments in any particular  industry,  but if it
is deemed appropriate for the achievement of its investment objective, up to 25%
of its assets,  at market value at the time of each investment,  may be invested
in any one industry,  except that positions in futures or option contracts shall
not be subject to this restriction;

     (10) issue any senior security (as that term is defined in the 1940 Act) if
such  issuance  is  specifically  prohibited  by the 1940 Act or the  rules  and
regulations promulgated  thereunder,  provided that collateral arrangements with
respect to options  and  futures,  including  deposits  of initial  deposit  and
variation margin, are not considered to be the issuance of a senior security for
purposes of this restriction; or

         (11)  invest  more than 5% of its total  assets  in the  securities  or
obligations of any one issuer (other than U.S.  Government  obligations) or more
than 10% of its total assets in the  outstanding  voting  securities  of any one
issuer;  provided,  however,  that up to 25% of its total assets may be invested
without regard to this restriction.

   
         STATE AND FEDERAL  RESTRICTION.  In order to comply with certain  state
and federal statutes and policies neither the Portfolio nor the Corporation,  on
behalf  of the  Fund,  may as a matter  of  operating  policy  (except  that the
Corporation  may  invest  all of the  Fund's  assets in an  open-end  investment
company  with  substantially  the  same  investment   objective,   policies  and
restrictions as the Fund) : purchase securities of any investment company if (i)
such  purchase at the time thereof would cause more than 10% of the total assets
(taken at the greater of cost or market value) of the Fund or the Portfolio,  as
the case may be, to be invested in the securities of investment companies;  (ii)
such purchase at the time thereof would cause the Fund or the Portfolio,  as the
case may be, to own  securities  of the acquired  investment  company  which are
valued at more than 5% of the assets of the Fund or  Portfolio,  as the case may
be; or (iii) such purchase  would cause more than 3% of the  outstanding  voting
securities  of any such issuer to be held by the Fund or the  Portfolio,  as the
case may be.  These  policies  are not  fundamental  and may be changed  without
shareholder or investor approval in response to changes in the various state and
federal requirements.
    

         PERCENTAGE  AND  RATING   RESTRICTIONS.   If  a  percentage  or  rating
restriction  on investment or  utilization of assets set forth above or referred
to in the  Prospectus  is adhered to at the time an investment is made or assets
are so utilized,  a later  change in  percentage  resulting  from changes in the
value of the 

                                       6
<PAGE>

     portfolio  securities  or a  later  change  in the  rating  of a  portfolio
security  is not  considered  a  violation  of  policy.  If the  Fund's  and the
Portfolio's  respective  investment  restrictions  relating  to  any  particular
investment practice or policy are not consistent,  the Portfolio has agreed with
the  Corporation,  on behalf of the Fund,  that the Portfolio will adhere to the
more restrictive limitation.

DIRECTORS, TRUSTEES AND OFFICERS

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

     The Directors of the  Corporation,  Trustees of the Portfolio and executive
officers of the  Corporation  and the  Portfolio,  their  principal  occupations
during the past five years  (although  their  titles may have varied  during the
period) and business addresses are:


                                        7

<PAGE>



                          DIRECTORS OF THE CORPORATION

         J.V.  SHIELDS,  JR.* -- Chairman of the Board and Director;  Trustee of
The 59 Wall  Street  Trust;  Managing  Director,  Chairman  and Chief  Executive
Officer of Shields & Company;  Chairman and Chief  Executive  Officer of Capital
Management  Associates,  Inc.;  Director  of  Flowers  Industries,  Inc.(1)  His
business address is Shields & Company, 140 Broadway, New York, NY 10005.

         EUGENE P.  BEARD** --  Director;  Trustee of The 59 Wall  Street  Trust
(since April 1993);  Vice Chairman - Finance and  Operations of The  Interpublic
Group of Companies.  His business address is The Interpublic Group of Companies,
Inc., 1271 Avenue of the Americas, New York, NY 10020.

   
         DAVID P.  FELDMAN** -- Director;  Trustee of The 59 Wall Street  Trust;
Retired;  Chairman  and Chief  Executive  Officer - AT&T  Investment  Management
Corporation  (prior to October 1997);  Director of Dreyfus Mutual Funds,  Equity
Fund of Latin  America,  New World  Balanced  Fund,  India Magnum Fund, and U.S.
Prime Properties Inc.;  Trustee of Corporate  Property  Investors.  His business
address 3 Tall Oaks Drive, Warren, NJ 07059.
    

         ALAN G. LOWY** -- Director;  Trustee of The 59 Wall Street Trust (since
April 1993);  Secretary of the Los Angeles County Board of Investments (prior to
March 1995). His business address is 4111 Clear Valley Drive, Encino, CA 91436.

   
     ARTHUR D.  MILTENBERGER** -- Director;  Trustee of The 59 Wall Street Trust
Vice  President  and Chief  Financial  Officer of  Richard  K.  Mellon and Sons;
Treasurer  of  Richard  King  Mellon  Foundation;  Director  of Vought  Aircraft
Corporation (prior to September 1994),  Caterair  International  (prior to April
1994);  Member of Advisory  Committee of Carlyle Group and Pittsburgh  Seed Fund
and Valuation Committee of Morgenthaler  Venture Funds(2).  His business address
is Richard K. Mellon and Sons, P.O. Box RKM, Ligonier, PA 15658.
    

                            TRUSTEES OF THE PORTFOLIO

   
     H.B. ALVORD** -- Chairman of the Board and Trustee; Retired; Trustee of the
Trust  (from  September  1990 to October  1994);  Director of The 59 Wall Street
Fund, Inc. (from September 1990 to October 1994); Trustee of Landmark Funds III,
Landmark Tax Free Reserves,  Landmark  Multi-State Tax Free Funds,  Landmark Tax
Free Income Funds, Landmark Fixed Income Funds, Landmark Funds I, Landmark Funds
II, and Landmark  International  Equity Fund (from  September 1990 to May 1997).
His business address is P.O. Box 5203, Carmel, CA 93921.
    

     RICHARD  L.   CARPENTER**  --  Trustee;   Retired;   Director  of  Internal
Investments,  Public  School  Employees'  Retirement  System  (prior to December
1995). His business address is 61 Cliff Street, Burlington, VT 05401.

     CLIFFORD A. CLARK** -- Trustee; Retired; Director of Schmid, Inc. (prior to
July 1993);  Managing  Director of the  Smith-Denison  Foundation.  His business
address is 42 Clowes Drive, Falmouth, MA 02540.

                                       8

<PAGE>

   


     DAVID M. SEITZMAN** -- Trustee; Retired;  Physician with Seitzman,  Shuman,
Kwart and Phillips  (prior to October  1997);  Director of the National  Capital
Underwriting Company,  Commonwealth Medical Liability Insurance Co. and National
Capital Insurance  Brokerage,  Limited. His business address is 7117 Nevis Road,
Bethesda, MD 20817.
    

                  OFFICERS OF THE CORPORATION AND THE PORTFOLIO

     PHILIP W. COOLIDGE -- President;  Chief Executive  Officer and President of
Signature Financial Group, Inc. ("SFG"), 59 Wall Street Distributors,  Inc. ("59
Wall Street  Distributors")  and 59 Wall Street  Administrators,  Inc. ("59 Wall
Street Administrators") (since June 1993).

     JAMES E. HOOLAHAN -- Vice President; Senior Vice President of SFG.

     JOHN R. ELDER --  Treasurer;  Vice  President  of SFG (since  April  1995);
Treasurer of Phoenix Family of Mutual Funds (prior to April 1995).

     LINDA T. GIBSON -- Secretary, Vice President and Assistant Secretary of SFG
(since June 1991);  Assistant  Secretary of 59 Wall Street  Distributors  and 59
Wall Street Administrators (since June 1993).

         SUSAN  JAKUBOSKI*** -- Assistant  Treasurer and Assistant  Secretary of
the Portfolio;  Assistant  Secretary,  Assistant Treasurer and Vice President of
Signature  Financial Group (Cayman) Limited (since August 1994); Fund Compliance
Administrator of Concord Financial Group, Inc. (from November
   
     1990 to August 1994).  Her business  address is Signature  Financial  Group
(Grand Cayman) Ltd., Suite 193, 12 Church Street, Hamilton, Bermuda HM-11.
    

     MOLLY S.  MUGLER  --  Assistant  Secretary;  Legal  Counsel  and  Assistant
Secretary of SFG; Assistant Secretary of 59 Wall Street Distributors and 59 Wall
Street Administrators (since June 1993).

     CHRISTINE A.  DRAPEAU -- Assistant  Secretary;  Assistant  Vice  President,
Signature  Financial Group, Inc. (since January 1996);  Paralegal and Compliance
Officer,  various  financial  companies  (July 1992 to January  1996);  Graduate
Student, Bentley College (prior to December 1994). -------------------------

     * Mr.  Shields  is an  "interested  person"  of  the  Corporation  and  the
Portfolio because of his affiliation with a registered broker-dealer.

     ** These  Directors and Trustees are members of the Audit  Committee of the
Corporation or the Portfolio, as the case may be.

     *** Ms.  Jakuboski is an officer of the  Portfolio but is not an officer of
the Corporation.

     (1) Shields & Company,  Capital  Management  Associates,  Inc.  and Flowers
Industries,  Inc.,  with  which Mr.  Shields  is  associated,  are a  registered
broker-dealer  and a  member  of the  New  York  Stock  Exchange,  a  registered
investment adviser, and a diversified food company, respectively.

                                       9

<PAGE>

     (2) Richard K. Mellon and Sons,  Richard  King  Mellon  Foundation,  Vought
Aircraft Corporation, Caterair International, The Carlyle Group and Morgenthaler
Venture Funds,  with which Mr.  Miltenberger  is or has been  associated,  are a
private  foundation,  a private  foundation,  a business  development  firm,  an
aircraft manufacturer,  an airline food services company, a merchant bank, and a
venture capital partnership, respectively.

         Each  Director  and officer of the  Corporation  listed above holds the
equivalent  position with The 59 Wall Street Trust.  The address of each officer
of the Corporation is 6 St. James Avenue,  Boston,  Massachusetts 02116. Messrs.
Coolidge, Hoolahan and Elder and Mss. Gibson, Jakuboski, Mugler and Drapeau also
hold similar  positions with other investment  companies for which affiliates of
59 Wall Street Distributors serves as the principal underwriter.

     Except  for Mr.  Shields,  no  Director  is an  "interested  person" of the
Corporation or the Portfolio as that term is defined in the 1940 Act.

   
DIRECTORS OF THE CORPORATION
    

         The Directors of the  Corporation  receive a base annual fee of $15,000
(except the Chairman  who  receives a base annual fee of $20,000)  which is paid
jointly  by all  series  of the  Corporation  and The 59 Wall  Street  Trust and
allocated among the series based upon their respective net assets.  In addition,
each series which has commenced  operations  pays an annual fee to each Director
of $1,000.

<TABLE>
<CAPTION>

<S>                        <C>                       <C>                  <C>             <C>

   
                                                     Pension or                          Total
                                                     Retirement                          Compensation
                           Aggregate                 Benefits Accrued  Estimated Annual  from the Corporation
Name of Person,            Compensation              as Part of        Benefits upon     and  Fund Complex*
POSITION                   FROM THE CORPORATION      FUND EXPENSES     RETIREMENT        PAID TO DIRECTORS

J.V. Shields, Jr.,         $17,646                   none               none             $30,000
Trustee

Eugene P. Beard,           $13,985                   none               none              25,000
Trustee

David P. Feldman,          $13,985                   none               none              25,000
Trustee

Alan G. Lowy,              $13,985                   none               none              25,000
Trustee

Arthur D. Miltenberger,    $13,985                   none               none              25,000
Trustee

</TABLE>


* The Fund  Complex  consists of the  Corporation  and The 59 Wall Street  Trust
which currently consists of three series.

PORTFOLIO TRUSTEES

         The  Trustees  of the  Portfolio  receive a base  annual fee of $12,000
(except the Chairman  who  receives a base annual fee of $17,000)  which is paid
jointly by the U.S.  Money  Market  Portfolio,  U.S.  Small  Company  Portfolio,
International  Equity Portfolio and Emerging Markets Portfolio together with the
Portfolio (the "Portfolios") and allocated among the Portfolios based upon their
respective  net  assets.  In  addition,   each  Portfolio  which  has  commenced
operations  pays  an  annual  fee to  each  Trustee  of  $1,000.  The  aggregate
compensation to each Trustee from the Portfolios was less than $60,000.

                                       10
    
<PAGE>

<TABLE>
<CAPTION>
<S>                         <C>                      <C>                <C>               <C>          


   
                                                     Pension or                           Total
                                                     Retirement                           Compensation
                           Aggregate                 Benefits Accrued  Estimated Annual   from the
Name of Person,            Compensation              as Part of        Benefits upon      Portfolio Complex*
POSITION                   FROM THE PORTFOLIO        PORTFOLIO EXPENSES RETIREMENT        PAID TO TRUSTEES

H.B. Alvord,               $16,196                   none                       none      $21,000
Trustee

Richard L. Carpenter,       11,726                   none                       none       16,000
Trustee

Clifford A. Clark,          11,726                   none                       none       16,000
Trustee

David M. Seitzman,          11,726                   none                       none       16,000
Trustee

</TABLE>

*The Portfolio Complex consists of the Portfolio and U.S. Money Market
Portfolio, U.S. Small Company Portfolio, International Equity Portfolio and
Emerging Markets Portfolio.
    

         By virtue of the responsibilities  assumed by Brown Brothers Harriman &
Co.  under  the  Investment  Advisory  Agreement  with  the  Portfolio  and  the
Administration  Agreement with the Corporation,  and by Brown Brothers  Harriman
Trust Company  (Cayman)  Limited  under the  Administration  Agreement  with the
Portfolio  (see  "Investment   Adviser"  and   "Administrators"),   neither  the
Corporation nor the Portfolio  requires  employees other than its officers,  and
none of its officers  devote full time to the affairs of the  Corporation or the
Portfolio,  as the  case  may be,  or,  other  than the  Chairmen,  receive  any
compensation from the Fund or the Portfolio.

   
         As of October 31, 1997, the Directors of the  Corporation,  Trustees of
the  Portfolio  and  officers of the  Corporation  and the  Portfolio as a group
beneficially owned less than 1% of the outstanding shares of the Corporation and
less than 1% of the  aggregate  beneficial  interests in the  Portfolio.  At the
close of business on that date, no person,  to the knowledge of the  management,
owned  beneficially more than 5% of the outstanding  shares of the Fund nor more
than 5% of the aggregate beneficial interests in the Portfolio.
    

INVESTMENT ADVISER


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

         Under its Investment Advisory Agreement with the Portfolio,  subject to
the general supervision of the Portfolio's  Trustees and in conformance with the
stated  policies  of the  Portfolio,  Brown  Brothers  Harriman  & Co.  provides
investment advice and portfolio  management  services to the Portfolio.  In this
regard,  it is the  responsibility  of Brown Brothers Harriman & Co. to make the
day-to-day  investment  decisions for the  Portfolio,  to place the purchase and
sale orders for portfolio transactions and to manage, generally, the Portfolio's
investments.

     The Investment Advisory Agreement between Brown Brothers Harriman & Co. and
the  Portfolio is dated August 22, 1995 and remains in effect for two years from
such date and  thereafter,  but only so long as the  agreement  is  specifically
approved at least  annually  (i) by a vote of the holders of a "majority  of the
outstanding voting securities" (as defined in the 1940 Act) of the Portfolio, or
by the Portfolio's Trustees, and (ii) by a vote of a majority of the Trustees of
the  Portfolio  who are not  parties to the  Investment  Advisory  Agreement  or
"interested persons" (as defined in the 1940 Act) of the Portfolio ("Independent
Trustees"), cast in person at a meeting called for the purpose of voting on such
approval.  The Investment  Advisory  Agreement was most recently approved by the
Independent  Trustees on 

                                       12
<PAGE>

     December  11,  1996.   The   Investment   Advisory   Agreement   terminates
automatically  if assigned and is  terminable  at any time without  penalty by a
vote of a majority of the Trustees of the  Portfolio or by a vote of the holders
of a "majority of the  outstanding  voting  securities"  (as defined in the 1940
Act) of the Portfolio on 60 days' written  notice to Brown  Brothers  Harriman &
Co.  and by Brown  Brothers  Harriman  & Co. on 90 days'  written  notice to the
Portfolio (see "Additional Information").

         With respect to the Portfolio,  the investment advisory fee paid to the
Investment  Adviser is calculated daily and paid monthly at an annual rate equal
to 0.65% of the Portfolio's average daily net assets.

         The  Glass-Steagall  Act prohibits certain financial  institutions from
engaging in the business of underwriting, selling or distributing securities and
from  sponsoring,  organizing or  controlling a registered  open-end  investment
company  continuously  engaged in the issuance of its shares,  such as the Fund.
There is presently no controlling precedent  prohibiting financial  institutions
such as Brown Brothers  Harriman & Co. from performing the investment  advisory,
administrative or shareholder servicing/eligible institution functions described
above.  If Brown  Brothers  Harriman  & Co.  were to  terminate  its  Investment
Advisory  Agreement with the Portfolio,  or were  prohibited from acting in such
capacity,  it is expected that the Trustees of the Portfolio  would recommend to
the  investors  that they approve a new  investment  advisory  agreement for the
Portfolio with another qualified adviser.  If Brown Brothers Harriman & Co. were
to terminate its Shareholder Servicing Agreement, Eligible Institution Agreement
or Administration  Agreement with the Corporation or were prohibited from acting
in any such capacity, its customers would be permitted to remain shareholders of
the  Fund  and  alternative   means  for  providing   shareholder   services  or
administrative  services,  as the case may be,  would be sought.  In such event,
although the operation of the Corporation  might change, it is not expected that
any shareholders would suffer any adverse financial  consequences.  However,  an
alternative   means  of  providing   shareholder   services  might  afford  less
convenience to shareholders.

ADMINISTRATORS



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

     The  Administration  Agreements  between the Corporation and Brown Brothers
Harriman & Co.  (dated  November 1, 1993) and between  the  Portfolio  and Brown
Brothers  Harriman Trust Company  (Cayman)  Limited (dated August 22, 1995) will
remain in effect for two years from such  respective  date and  thereafter,  but
only so long as each such agreement is  specifically  approved at least annually
in the  same  manner  as the  Portfolio's  Investment  Advisory  Agreement  (see
"Investment Adviser"). The Independent Directors/Trustees most recently approved
the Corporation's  Administration  Agreement and the Portfolio's  Administration
Agreement  on December  18,  1996 and  December  11,  1996,  respectively.  Each
agreement will terminate  automatically  if assigned by either party thereto and
is terminable by the Corporation or the Portfolio at any time without penalty by
a vote of a majority of the Directors of the  Corporation or the Trustees of the
Portfolio, as the case may be, or by a vote of the holders of a "majority of the
outstanding  voting  securities" (as defined in the 1940 Act) of the Corporation
or the  Portfolio,  as the  case  may be  (see  "Additional  Information").  The
Corporation's  Administration  Agreement is  terminable  by the Directors of the
Corporation  or  shareholders  of the  Corporation on 60 days' written notice to
Brown  Brothers  Harriman  & Co. The  Portfolio's  Administration  Agreement  is
terminable by the Trustees of the  Portfolio or by the Fund and other  investors
in the Portfolio on 60 days' written  notice to Brown  Brothers  Harriman  Trust
Company  (Cayman)  Limited.  Each  agreement  is  terminable  by the  respective
Administrator on 90 days' written notice to the Corporation or the Portfolio, as
the case may be.

                                       13
<PAGE>

         The  administrative  fee payable to Brown Brothers  Harriman & Co. from
the Fund is  calculated  daily and  payable  monthly at an annual  rate equal to
0.125% of the Fund's average daily net assets.

         The  administrative  fee paid to Brown Brothers  Harriman Trust Company
(Cayman)  Limited by the Portfolio is  calculated  and paid monthly at an annual
rate equal to 0.035% of the Portfolio's average daily net assets. Brown Brothers
Harriman Trust Company  (Cayman)  Limited is a wholly-owned  subsidiary of Brown
Brothers Harriman Trust Company of New York, which is a wholly-owned  subsidiary
of Brown Brothers Harriman & Co.

DISTRIBUTOR



================================================================================
   
         The  Distribution  Agreement  (dated  September 5, 1990, as amended and
restated  February  12,  1991)  between  the  Corporation  and  59  Wall  Street
Distributors remains in effect indefinitely,  but only so long as such agreement
is specifically approved at least annually in the same manner as the Portfolio's
Investment  Advisory  Agreement (see  "Investment  Adviser").  The  Distribution
Agreement  was  most  recently  approved  by the  Independent  Directors  of the
Corporation  on February 18, 1997.  The agreement  terminates  automatically  if
assigned by either party thereto and is  terminable  with respect to the Fund at
any  time  without  penalty  by a vote of a  majority  of the  Directors  of the
Corporation or by a vote of the holders of a "majority of the outstanding voting
securities"  (as  defined  in  the  1940  Act)  of  the  Fund  (see  "Additional
Information"). The Distribution Agreement is terminable with respect to the Fund
by the  Corporation's  Directors or shareholders of the Fund on 60 days' written
notice to 59 Wall Street  Distributors.  The  agreement is terminable by 59 Wall
Street Distributors on 90 days' written notice to the Corporation.
    

NET ASSET VALUE; REDEMPTION IN KIND

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

     The net asset value of each of the Fund's shares is determined each day the
New York Stock  Exchange  is open for regular  trading.  (As of the date of this
Statement of  Additional  Information,  such  Exchange is so open every  weekday
except for the following holidays:  New Year's Day, Martin Luther King, Jr. Day,
Presidents'  Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor Day,
Thanksgiving Day and Christmas.)  This  determination of net asset value of each
share of the Fund is made once  during  each such day as of the close of regular
trading on such  Exchange  by  subtracting  from the value of the  Fund's  total
assets (I.E., the value of its investment in the Portfolio and other assets) the
amount of its liabilities,  including expenses payable or accrued,  and dividing
the  difference by the number of shares of the Fund  outstanding at the time the
determination is made.

         The  value  of the  Portfolio's  net  assets  (I.E.,  the  value of its
securities and other assets less its liabilities,  including expenses payable or
accrued)  is  determined  at the same time and on the same days as the net asset
value per share of the Fund is determined. The value of the Fund's investment in
the Portfolio is  determined by  multiplying  the value of the  Portfolio's  net
assets by the  percentage,  effective for that day, which  represents the Fund's
share of the aggregate beneficial interests in the Portfolio.

         The value of investments  listed on a domestic  securities  exchange is
based on the last sale  prices  as of the  regular  close of the New York  Stock
Exchange  (which is  currently  4:00 p.m.,  New York time) or, in the absence of
recorded sales, at the average of readily available closing bid and asked prices
on such Exchange.

                                       14
<PAGE>

         Unlisted  securities  are  valued at the  average of the quoted bid and
asked  prices in the  over-the-counter  market.  The value of each  security for
which readily available market quotations exist is based on a decision as to the
broadest and most representative market for such security.

         Securities or other assets for which market  quotations are not readily
available are valued at fair value in accordance with procedures  established by
and  under  the  general  supervision  and  responsibility  of  the  Portfolio's
Trustees. Such procedures include the use of independent pricing services, which
use prices  based upon yields or prices of  securities  of  comparable  quality,
coupon,  maturity and type;  indications as to values from dealers;  and general
market  conditions.  Short-term  investments which mature in 60 days or less are
valued at amortized cost if their  original  maturity was 60 days or less, or by
amortizing  their  value on the 61st day prior to  maturity,  if their  original
maturity when acquired was more than 60 days,  unless this is determined  not to
represent fair value by the Trustees of the Portfolio.

         Subject to the  Corporation's  compliance with applicable  regulations,
the Corporation has reserved the right to pay the redemption  price of shares of
a Fund,  either  totally or partially,  by a  distribution  in kind of portfolio
securities  (instead of cash). The securities so distributed  would be valued at
the same amount as that assigned to them in calculating  the net asset value for
the shares being sold. If a shareholder  received a  distribution  in kind,  the
shareholder  could incur brokerage or other charges in converting the securities
to cash.  The  Corporation  has elected,  however,  to be governed by Rule 18f-1
under the 1940  Act,  as a result of which the  Corporation  is  obligated  with
respect to any one investor  during any 90 day period to redeem shares of a Fund
solely in cash up to the lesser of  $250,000  or 1% of that Fund's net assets at
the beginning of such 90 day period.

COMPUTATION OF PERFORMANCE


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

         The  average  annual  total  return of the Fund is  calculated  for any
period by (a) dividing (i) the sum of the aggregate net asset value per share on
the last day of the  period of shares  purchased  with a $1,000  payment  on the
first day of the period and the  aggregate net asset value per share on the last
day of the  period  of shares  purchasable  with  dividends  and  capital  gains
distributions  declared  during such period with respect to shares  purchased on
the first day of such  period  and with  respect to shares  purchased  with such
dividends  and capital  gains  distributions,  by (ii)  $1,000,  (b) raising the
quotient to a power equal to 1 divided by the number of years in the period, and
(c) subtracting 1 from the result.

         The  total  rate of  return  of the Fund for any  specified  period  is
calculated  by (a)  dividing  (i) the sum of the  aggregate  net asset value per
share on the last day of the period of shares purchased with a $1,000 payment on
the first day of the period and the  aggregate  net asset value per share on the
last day of the period of shares  purchasable  with  dividends and capital gains
distributions  declared  during such period with respect to shares  purchased on
the first day of such  period  and with  respect to shares  purchased  with such
dividends and capital gains distributions, by (ii) $1,000, and (b) subtracting 1
from the result.

         Performance  calculations  should not be considered a representation of
the average  annual or total rate of return of the Fund in the future  since the
rates of return are not fixed.  Actual total rates of return and average  annual
rates of return  depend on  changes in 

                                       15
<PAGE>

     the  market  value of,  and  dividends  and  interest  received  from,  the
investments  held by the Portfolio and the Fund's and the  Portfolio's  expenses
during the period.

         Total and average annual rate of return  information  may be useful for
reviewing the  performance  of the Fund and for providing a basis for comparison
with other  investment  alternatives.  However,  unlike  bank  deposits or other
investments  which pay a fixed  yield for a stated  period of time,  the  Fund's
total rate of return  fluctuates,  and this should be considered  when reviewing
performance or making comparisons.

FEDERAL TAXES


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

         Each year, the Corporation  intends to continue to qualify the Fund and
elect  that the Fund be treated as a  separate  "regulated  investment  company"
under  Subchapter  M of the  Internal  Revenue  Code of 1986,  as  amended  (the
"Code").  Under  Subchapter  M of the Code the Fund is not  subject  to  federal
income taxes on amounts distributed to shareholders.

     Qualification  as a regulated  investment  company under the Code requires,
among other  things,  that (a) at least 90% of the Fund's  annual gross  income,
without offset for losses from the sale or other  disposition of securities,  be
derived from interest,  payments with respect to securities loans, dividends and
gains from the sale or other  disposition of securities,  foreign  currencies or
other  income  derived  with  respect  to its  business  of  investing  in  such
securities;  (b) less than 30% of the Fund's annual gross income be derived from
gains  (without  offset  for  losses)  from  the sale or  other  disposition  of
securities held for less than three months;  and (c) the holdings of the Fund be
diversified so that, at the end of each quarter of its fiscal year, (i) at least
50% of the  market  value of the  Fund's  assets be  represented  by cash,  U.S.
Government  securities and other securities limited in respect of any one issuer
to an amount not greater than 5% of the Fund's assets and 10% of the outstanding
voting securities of such issuer, and (ii) not more than 25% of the value of the
Fund's  assets be invested in the  securities of any one issuer (other than U.S.
Government  securities  and  securities  of  other  investment  companies).   In
addition,  in order not to be subject to federal income tax, at least 90% of the
Fund's net  investment  income and net  short-term  capital gains earned in each
year must be distributed to the Fund's shareholders.

         Gains or losses on sales of securities are treated as long-term capital
gains or losses if the  securities  have been held for more than one year except
in  certain  cases  where a put has been  acquired  or a call  has been  written
thereon.  Other  gains  or  losses  on the sale of  securities  are  treated  as
short-term capital gains or losses. Gains and losses on the sale, lapse or other
termination of options on securities  are generally  treated as gains and losses
from the sale of securities. If an option written for the Portfolio lapses or is
terminated  through a closing  transaction,  such as a repurchase  of the option
from its holder,  the Portfolio  may realize a short-term  capital gain or loss,
depending on whether the premium  income is greater or less than the amount paid
in the closing transaction. If securities are sold pursuant to the exercise of a
call option  written for them,  the premium  received would be added to the sale
price of the securities  delivered in determining  the amount of gain or loss on
the sale.  The  requirement  that less than 30% of the  Fund's  gross  income be
derived from gains from the sale of  securities  held for less than three months
may limit the  Portfolio's  ability to write options and engage in  transactions
involving stock index futures.

         Certain  options  contracts  held for the  Portfolio at the end of each
fiscal  year are  required  to be  "marked  to market"  for  federal  income tax
purposes; that is, treated as having been sold at market value. Sixty percent of
any gain or loss recognized on these deemed 

                                       16


<PAGE>

     sales and on actual  dispositions are treated as long-term  capital gain or
loss,  and  the  remainder  are  treated  as  short-term  capital  gain  or loss
regardless of how long the Portfolio has held such options. The Portfolio may be
required to defer the recognition of losses on stock or securities to the extent
of any unrecognized gain on offsetting positions held for it.

         RETURN OF CAPITAL.  If the net asset value of shares is reduced below a
shareholder's  cost as a result of a dividend or capital gains distribution from
the Fund,  such  dividend or capital  gains  distribution  would be taxable even
though it represents a return of invested capital.

     REDEMPTION OF SHARES.  Any gain or loss realized on the  redemption of Fund
shares  by a  shareholder  who is not a  dealer  in  securities  is  treated  as
long-term  capital  gain or loss if the shares  have been held for more than one
year,  and  otherwise  as  short-term  capital gain or loss.  However,  any loss
realized by a  shareholder  upon the  redemption of Fund shares held one year or
less is  treated as a  long-term  capital  loss to the  extent of any  long-term
capital gains  distributions  received by the  shareholder  with respect to such
shares.  Additionally,  any loss  realized on a  redemption  or exchange of Fund
shares is disallowed to the extent the shares  disposed of are replaced within a
period of 61 days beginning 30 days before such disposition, such as pursuant to
reinvestment of a dividend or capital gains distribution in Fund shares.

DESCRIPTION OF SHARES


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

         The Corporation is an open-end management  investment company organized
as a Maryland  corporation  on July 16,  1990.  The  Articles  of  Incorporation
currently permit the Corporation to issue 2,500,000,000  shares of common stock,
par value $0.001 per share, of which  25,000,000  shares have been classified as
shares of The 59 Wall Street Mid-Cap Fund. The Corporation currently consists of
eight portfolios.

         Shareholders are entitled to one vote for each share held on matters on
which they are entitled to vote.  Shareholders  in the  Corporation  do not have
cumulative  voting  rights,  and  shareholders  owning  more  than  50%  of  the
outstanding  shares of the  Corporation  may elect all of the  Directors  of the
Corporation if they choose to do so and in such event the other  shareholders in
the Corporation would not be able to elect any Director.  The Corporation is not
required and has no current intention to hold meetings of shareholders  annually
but the  Corporation  will hold  special  meetings of  shareholders  when in the
judgment of the  Corporation's  Directors it is necessary or desirable to submit
matters for a shareholder vote.  Shareholders  have under certain  circumstances
(E.G.,  upon  application and submission of certain  specified  documents to the
Directors by a specified number of  shareholders)  the right to communicate with
other  shareholders in connection with requesting a meeting of shareholders  for
the purpose of removing one or more Directors.  Shareholders also have the right
to remove one or more Directors without a meeting by a declaration in writing by
a specified  number of  shareholders.  Shares have no  preference,  pre-emptive,
conversion  or  similar  rights.   Shares,  when  issued,  are  fully  paid  and
non-assessable.

         Stock certificates are not issued by the Corporation.

         The Articles of  Incorporation  of the Corporation  contain a provision
permitted  under  Maryland  Corporation  Law which under  certain  circumstances
eliminates  the  personal  liability  of  the  Corporation's  Directors  to  the
Corporation or its shareholders.

                                       17

<PAGE>

     The Articles of  Incorporation  and the By-Laws of the Corporation  provide
that the Corporation  indemnify the Directors and officers of the Corporation to
the full  extent  permitted  by the  Maryland  Corporation  Law,  which  permits
indemnification  of such persons against  liabilities  and expenses  incurred in
connection  with  litigation  in which  they may be  involved  because  of their
offices with the Corporation.  However, nothing in the Articles of Incorporation
or the By-Laws of the Corporation  protects or indemnifies a Director or officer
of the Corporation  against any liability to the Corporation or its shareholders
to which he would  otherwise  be subject by reason of willful  misfeasance,  bad
faith,  gross  negligence  or reckless  disregard of the duties  involved in the
conduct of his office.

         Interests in the Portfolio have no preference,  preemptive,  conversion
or similar rights, and are fully paid and  non-assessable.  The Portfolio is not
required to hold annual meetings of investors, but will hold special meetings of
investors when, in the judgment of its Trustees, it is necessary or desirable to
submit  matters for an  investor  vote.  Each  investor is entitled to a vote in
proportion to the share of its investment in the Portfolio.

PORTFOLIO TRANSACTIONS


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

         In effecting securities transactions for the Portfolio,  the Investment
Adviser seeks to obtain the best price and  execution of orders.  In selecting a
broker,  the Investment  Adviser  considers a number of factors  including:  the
broker's  ability to execute  orders without  disturbing  the market price;  the
broker's reliability for prompt,  accurate confirmations and on-time delivery of
securities;  the  research  and other  investment  information  provided  by the
broker; and the commissions charged. Accordingly, the commissions charged by any
such  broker may be greater  than the amount  another  firm might  charge if the
Investment  Adviser determines in good faith that the amount of such commissions
is reasonable  in relation to the value of the  brokerage  services and research
information provided by such broker.

         Portfolio   securities   are  not   purchased   from  or  sold  to  the
Administrator,  Distributor or Investment Adviser or any "affiliated person" (as
defined in the 1940 Act) of the Administrator, Distributor or Investment Adviser
when such entities are acting as principals,  except to the extent  permitted by
law. The Portfolio  uses Brown  Brothers  Harriman & Co. as one of its principal
brokers when, in the judgment of the Investment Adviser,  that firm will be able
to  obtain  a price  and  execution  at least as  favorable  as other  qualified
brokers. As one of the Portfolio's principal brokers,  Brown Brothers Harriman &
Co. receives brokerage commissions from the Portfolio.

     The use of Brown  Brothers  Harriman & Co. as a broker for the Portfolio is
subject to the provisions of Rule 11a2-2(T) under the Securities Exchange Act of
1934 which  permits  the  Portfolio  to use Brown  Brothers  Harriman & Co. as a
broker provided that certain conditions are met.

         In addition,  under the 1940 Act,  commissions paid by the Portfolio to
Brown  Brothers  Harriman  & Co.  in  connection  with a  purchase  or  sale  of
securities  offered  on a  securities  exchange  may not  exceed  the  usual and
customary broker's commission.

     The Trustees of the Portfolio from time to time review,  among otherthings,
information relating to the commissions charged by Brown Brothers Harriman & Co.
to the  Portfolio  and to its other  customers and  information  concerning  the
prevailing level of commissions charged by other qualified brokers. In addition,
the procedures pursuant to which Brown Brothers

                                       18

<PAGE>

     Harriman  & Co.  effects  brokerage  transactions  for  the  Portfolio  are
reviewed  and  approved  no  less  often  than  annually  by a  majority  of the
non-interested Trustees of the Portfolio.

         A portion of the  transactions  for the Portfolio are executed  through
qualified  brokers other than Brown  Brothers  Harriman & Co. In selecting  such
brokers,  the Investment  Adviser may consider the research and other investment
information  provided by such brokers.  Research services provided by brokers to
which Brown Brothers Harriman & Co. has allocated brokerage business in the past
include  economic  statistics  and  forecasting  services,  industry and company
analyses,  portfolio  strategy  services,   quantitative  data,  and  consulting
services from economists and political analysts.  Research services furnished by
brokers are used for the benefit of all the Investment Adviser's clients and not
solely or necessarily for the benefit of the Portfolio.  The Investment  Adviser
believes that the value of research  services  received is not  determinable nor
does such research  significantly  reduce its expenses.  The Portfolio  does not
reduce  the fee paid to the  Investment  Adviser  by any  amount  that  might be
attributable to the value of such services.

         The  Investment  Adviser  may  direct  a  portion  of  the  Portfolio's
securities  transactions  to certain  unaffiliated  brokers  which in turn use a
portion  of the  commissions  they  receive  from  the  Portfolio  to pay  other
unaffiliated  service providers on behalf of the Portfolio for services provided
for which the Portfolio  would  otherwise be obligated to pay. Such  commissions
paid by the  Portfolio  are at the same rate paid to other brokers for effecting
similar transactions in listed equity securities.

         A  committee,  comprised  of officers  and  partners of Brown  Brothers
Harriman & Co. who are portfolio  managers of some of Brown Brothers  Harriman &
Co.'s managed accounts (the "Managed  Accounts"),  evaluates  semi-annually  the
nature and quality of the brokerage and research  services  provided by brokers,
and,  based on this  evaluation,  establishes  a list and  projected  ranking of
preferred  brokers for use in determining the relative amounts of commissions to
be allocated to such brokers. However, in any semi-annual period, brokers not on
the list may be used, and the relative amounts of brokerage  commissions paid to
the brokers on the list may vary substantially from the projected rankings.

         The Trustees of the Portfolio  review regularly the  reasonableness  of
commissions and other  transaction  costs incurred for the Portfolio in light of
facts  and  circumstances  deemed  relevant  from  time  to  time  and,  in that
connection,  receive  reports from the  Investment  Adviser and  published  data
concerning transaction costs incurred by institutional investors generally.

     Over-the-counter purchases and sales are transacted directly with principal
market makers,  except in those  circumstances  in which, in the judgment of the
Investment  Adviser,  better  prices and  execution  of orders can  otherwise be
obtained.  If the  Portfolio  effects a closing  transaction  with  respect to a
futures or option contract,  such transaction  normally would be executed by the
same broker-dealer who executed the opening transaction.  The writing of options
by the  Portfolio  may be  subject  to  limitations  established  by each of the
exchanges  governing  the  maximum  number of options in each class which may be
written by a single investor or group of investors acting in concert, regardless
of whether the options are  written on the same or  different  exchanges  or are
held or written in one or more  accounts  or through  one or more  brokers.  The
number of  options  which the  Portfolio  may write may be  affected  by options
written by the Investment  Adviser for other  investment  advisory  clients.  An
exchange may order the  liquidation of positions  found to be in excess of these
limits, and it may impose certain other sanctions.

         On those  occasions  when  Brown  Brothers  Harriman  & Co.  deems  the
purchase or sale of a security to be in the best  interests of the  Portfolio as
well as other customers,  Brown 

                                       19
<PAGE>

     Brothers  Harriman & Co., to the extent  permitted by  applicable  laws and
regulations,  may, but is not obligated to,  aggregate the securities to be sold
or purchased  for the  Portfolio  with those to be sold or  purchased  for other
customers  in  order  to  obtain  best  execution,   including  lower  brokerage
commissions,  if  appropriate.  In such event,  allocation of the  securities so
purchased or sold as well as any expenses  incurred in the  transaction are made
by Brown Brothers Harriman & Co. in the manner it considers to be most equitable
and consistent  with its fiduciary  obligations to its customers,  including the
Portfolio.  In  some  instances,  this  procedure  might  adversely  affect  the
Portfolio.

ADDITIONAL INFORMATION


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

         As used in this Statement of Additional Information and the Prospectus,
the term "majority of the outstanding voting securities" (as defined in the 1940
Act)  currently  means  the  vote of (i) 67% or more of the  outstanding  voting
securities  present  at a  meeting,  if the  holders  of  more  than  50% of the
outstanding  voting securities are present in person or represented by proxy; or
(ii) more than 50% of the outstanding voting securities, whichever is less.

         Fund shareholders  receive  semi-annual  reports  containing  unaudited
financial  statements and annual reports containing financial statements audited
by independent auditors.

         A shareholder's right to receive payment with respect to any redemption
may be suspended or the payment of the redemption proceeds postponed: (i) during
periods when the New York Stock  Exchange is closed for other than  weekends and
holidays or when regular trading on such Exchange is restricted as determined by
the  Securities  and  Exchange  Commission  by rule or  regulation,  (ii) during
periods in which an emergency  exists which causes disposal of, or evaluation of
the  net  asset  value  of,   portfolio   securities  to  be   unreasonable   or
impracticable,  or (iii) for such other periods as the  Securities  and Exchange
Commission may permit.

     With respect to the securities offered by the Prospectus, this Statement of
Additional  Information  and the  Prospectus do not contain all the  information
included in the  Registration  Statement  filed with the Securities and Exchange
Commission  under  the  Securities  Act  of  1933.  Pursuant  to the  rules  and
regulations  of the Securities and Exchange  Commission,  certain  portions have
been omitted. The Registration  Statement including the exhibits filed therewith
may be examined  at the office of the  Securities  and  Exchange  Commission  in
Washington, D.C.

         Statements  contained in this Statement of Additional  Information  and
the Prospectus concerning the contents of any contract or other document are not
necessarily  complete,  and in each  instance,  reference is made to the copy of
such  contract  or  other  document  filed  as an  exhibit  to the  Registration
Statement. Each such statement is qualified in all respects by such reference.

   
FINANCIAL STATEMENTS

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

         The  statement  of assets and  liabilities  and  Report of  Independent
Accountants  for U.S.  Mid-Cap  Portfolio  as of October  31,  1997 is  attached
hereto.
    




                                       20

<PAGE>





   
                             U.S. MID-CAP PORTFOLIO
                       STATEMENT OF ASSETS AND LIABILITIES
                      (EXPRESSED IN UNITED STATES DOLLARS)

                                OCTOBER 31, 1997

ASSETS:
       Cash . . . . . . . . . . . . . . . . . . . . . . . . .      $100,100
                                      Total assets  . . .. . . . .  100,100

LIABILITIES:
                 Total liabilities . . . . . . . . . . . . . . .          0
                                                                    -------

NET ASSETS:  . . . . . . . . . . . . . . . . . . . . . . . . .     $100,100
                                                                    =======

NOTES:

     (1)  U.S.  Mid-Cap  Portfolio,  a New York  trust  (the  "Portfolio"),  was
organized  on June 15, 1993 and has been  inactive  since that date,  except for
matters relating to the  organization of the Portfolio,  the registration of the
Portfolio under the Investment Company Act of 1940, as amended,  the request and
receipt of private letter rulings from the Internal Revenue Service, the sale of
a beneficial  interest  therein at the  purchase  price of $100,000 to BBH & Co.
Mid-Cap  Fund  (Cayman)  and the sale of a  beneficial  interest  therein at the
purchase price of $100 to Signature Financial Group (Cayman) Ltd.

     (2) At the close of each  business  day of the  Portfolio,  the value of an
investor's  beneficial  interest in the Portfolio is equal to the product of (i)
the aggregate net asset value of the Portfolio multiplied by (ii) the percentage
effective for that day for that investor.
    


                                       21

   
ws5539
    

   
WS5526B
    

<PAGE>

DELOITTE & TOUCHE   
- -----------------                -------------------------------------------- 
            LOGO                 One Capital Place   Telephone: 345-949-7500
                                 P.O. Box 1787 GT    Facsimile: 345-949-8238
                                 Grand Cayman
                                 Cayman Islands, B.W.I.

INDEPENDENT AUDITORS' REPORT

To the Trustee of 
     U.S. Mid-Cap Portfolio

We have audited the accompanying statement of assets and liabilities of the U.S.
Mid-Cap Portfolio as of October 31, 1997 (all expressed in United States
dollars). This financial statement is the responsibility of the Portfolio's
management. Our responsibility is to express an opinion on this financial
statement based on our audit.

We conducted our audit in accordance with auditing standards generally accepted
in the United States of America.  Those standards require that we plan and 
perform the audit to obtain reasonable assurance about whether the financial
statement is free of material misstatement. An audit includes examining, on a 
test basis, evidence supporting the amounts and disclosures in the financial
statement.  An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audit provides a 
reasonable basis for our opinion.

In our opinion, such financial statement presents fairly, in all material
respects, the financial position of U.S. Mid-Cap Portfolio at October 31, 1997
in conformity with accounting principles generally accepted in the United States
of America.

/S/DELOITTE & TOUCHE
Grand Cayman, Cayman Islands
October 31, 1997

 

Deloitte Touche
Tohmatsu
International   

                                       22
<PAGE>







                                     PART C

                                OTHER INFORMATION


Item 24.  Financial Statements and Exhibits.

(a) Financial Statements included in Part A:

   
                      Not Applicable.


Financial Statements included in the Statement of Additional constituting Part
B of the Registration Statement:

    U.S. Mid-Cap Portfolio

         Statement of Assets and Liabilities at October 31, 1997.
         Notes to Statement of Assets and Liabilities.
         Independent Auditor's Report.

    


                                       C-1
<PAGE>
         (b)  Exhibits:


               1 -- (a) Restated Articles of Incorporation of the Registrant.(7)
                 -- (b) Establishment and Designation of Series of The 59 Wall 
                        Street U.S. Equity Fund and The 59 Wall Street Short/
                        Intermediate Fixed Fund.(7)
                 -- (c) Establishment and Designation of Series of The 59 Wall 
                        Street Small Company Fund.(7)
                 -- (d) Establishment and Designation of Series of The 59 Wall
                        Street International Equity Fund.(7)
                 -- (e) Establishment and Designation of Series of The 59 Wall
                        Street Short Term Fund. (7)

                 -- (f) Redesignation of series of The 59 Wall Street Inflation-
                        Indexed Securities Fund (formerly, The 59 Wall Street
                        Short/Intermediate Fixed Income Fund). (9)

                 -- (g) Redesignation of series of The 59 Wall Street Emerging 
                        Markets Fund (formerly, The 59 Wall Street Short Term
                        Fund).(10)

                 -- (h) Establishment and Designation of Series of The 59 Wall 
                        Street Mid-Cap Fund.(11)

               2 --     Amended and Restated By-Laws of the Registrant.(7)

               3 --     Not Applicable.

               4 --     Not Applicable.

               5 -- (a) Advisory Agreement with respect to The 59 Wall Street
                        U.S. Equity Fund.(7)

                    (b) Advisory Agreement with respect to The 59 Wall Street 
                        Short/Intermediate Fixed Income Fund.(7)

               6 -- Form of Amended and Restated Distribution Agreement.(3)

               7 --  Not Applicable.

               8 -- (a) Form of Custody Agreement.(2)

                    (b) Form of Transfer Agency Agreement.(2)


   
               9 -- (a) Amended and Restated Administration Agreement.(6)
                        (1) Appendix A to Amended and Restated Administration 
                            Agreement. (12)
    
                           
                    (b) Subadministrative Services Agreement.(6)

                    (c) Form of License Agreement.(1)

                    (d) Amended and Restated Shareholder Servicing Agreement.(6)
                        (1) Appendix A to Amended and Restated Shareholder
                            Servicing Agreement. (10)
                        (2) Appendix A to Amended and Restated Shareholder
                            Servicing Agreement. (11)

                    (e) Amended and Restated Eligible Institution Agreement.(6)
                        (1) Appendix A to Amended and Restated Eligible
                            Institution Agreement. (10)
                        (2) Appendix A to Amended and Restated Eligible
                            Institution Agreement. (11)

                    (f) Form of Expense Reimbursement Agreement with respect to 
                        The 59 Wall Street U.S. Equity Fund.(6)

                                    
                    (g) Form of Expense Reimbursement Agreement with respect to
                        The 59 Wall Street Short/Intermediate Fixed 
                        Fund.(6)
                    
              10 --     Opinion of Counsel (including consent).(2)



                                       C-2



   
              11 --     Independent auditors' consent.(12)
    

              12 --     Not Applicable.

              13 --     Copies of investment representation letters from initial
                        shareholders.(2)

              14 --     Not Applicable.

              15 --     Not Applicable.


   
              16 --    Schedule for Computation of Performance Quotations.(12)
    

              17 --    Financial Data Schedule.(10)

              19 --    Powers of Attorney of Trustees and officers. (8)

- ---------------------
(1)Filed with the initial Registration Statement on July 16, 1990.

(2)Filed with Amendment No. 1 to this Registration Statement on October 9, 1990.

(3)Filed with Amendment No.2 to this Registration Statement on February 14,
   1991.

(4)Filed with Amendment No. 5 to this Registration Statement on June 15, 1992.

(5)Filed with Amendment No. 7 to this Registration Statement on March 1, 1993.

(6)Filed with Amendment No.9 to this Registration Statement on 
   December 30, 1993.

(7)Filed with Amendment No. 24 to this Registration Statement on 
   February 28, 1996.

(8)Filed with Amendment No. 26 to this Registration Statement on 
   February 21, 1997.

(9)Filed with Amendment No. 28 to this Registration Statement on
   February 28, 1997.

(10)Filed with Amendment No. 29 to this Registration Statement on
    May 20, 1997.

(11)Filed with Amendment No. 30 to this Registration Statement on
    August 20, 1997.

(12)Filed herewith.


Item 25.  Persons Controlled by or Under Common Control with Registrant.

         See "Directors and Officers" in the Statement of Additional Information
filed as part of this Registration Statement.

Item 26.  Number of Holders of Securities.

   
    Title of Class                            Number of Record Holders
     Common Stock                               (as of September 30, 1997)


The 59 Wall Street Small Company Fund                    447  
The 59 Wall Street European Equity Fund                1,343 
The 59 Wall Street Pacific Basin Equity Fund           1,203  
The 59 Wall Street Inflation-Indexed
Securities Fund                                           86          
The 59 Wall Street U.S. Equity Fund                      495   
The 59 Wall Street International Equity Fund              69    
The 59 Wall Street Emerging Markets Fund                 108   
The 59 Wall Street Mid-Cap Fund                            0
    

                                      C-3
<PAGE>
Item 27.          Indemnification

         Reference is made to Article VII of Registrant's By-Laws and to Section
5 of the  Distribution  Agreement  between  the  Registrant  and 59 Wall  Street
Distributors, Inc.

         Registrant,  its Directors and officers,  and persons  affiliated  with
them are insured  against  certain  expenses in  connection  with the defense of
actions, suits or proceedings,  and certain liabilities that might be imposed as
a result of such actions, suits or proceedings.

         Insofar as  indemnification  for liability arising under the Securities
Act of 1933, as amended (the "Act"), may be permitted to Directors, officers and
controlling persons of the Registrant pursuant to the foregoing  provisions,  or
otherwise, the Registrant has been advised that in the opinion of the Securities
and  Exchange  Commission  such  indemnification  is  against  public  policy as
expressed in the Act and is, therefore, unenforceable. In the event that a claim
for  indemnification  against  such  liabilities  (other than the payment by the
Registrant of expenses  incurred or paid by a Director,  officer of  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  Director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of  appropriate  jurisdiction  the  question  of whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

Item 28.          Business and Other Connections of Investment Adviser.

         The  Registrant's  investment  adviser,  Brown Brothers  Harriman & Co.
("BBH & Co."), is a New York limited  partnership.  BBH & Co. conducts a general
banking business and is a member of the New York Stock Exchange, Inc.

         To the  knowledge of the  Registrant,  none of the general  partners or
officers of BBH & Co. is engaged in any other business, profession,  vocation or
employment of a substantial nature.



                                       C-4

<PAGE>

Item 29.          Principal Underwriters.

         1.       (a)      59 Wall Street Distributors, Inc. ("59 Wall Street
                           Distributors") and its affiliates, also serves as
                           administrator and/or distributor to other
                           registered investment companies.

                  (b)      Set forth below are the names, principal business
                           addresses and positions of each Director and
                           officer of 59 Wall Street Distributors.  The
                           principal business address of these individuals is
                           c/o 59 Wall Street Distributors, Inc., 6 St. James
                           Avenue, Boston, MA 02116.  Unless otherwise
                           specified, no officer or Director of 59 Wall
                           Street Distributors serves as an officer or
                           Director of the Registrant.

                         Position and Offices with        Position and Offices
    Name                 59 Wall Street Distributors      with the Registrant 
- -------------            ---------------------------      --------------------

Philip W. Coolidge       Chief Executive                  President
                          Officer, President
                          and Director

John R. Elder            Assistant Treasurer              Treasurer


Linda T. Gibson          Assistant Secretary              Secretary


Molly S. Mugler          Assistant Secretary              Assistant Secretary

Christine A. Drapeau               --                     Assistant Secretary

Linwood C. Downs         Treasurer                               --


Robert Davidoff          Director                                --
CMNY Capital, L.P.
135 East 57th Street
New York, NY  10022

Donald Chadwick          Director                                --
Scarborough & Company
110 East 42nd Street
New York, NY  10017

                                       C-5

<PAGE>
Leeds Hackett           Director                                  --
National Credit
Management Corporation
10155 York Road
Cockeysville, MD  21030

Laurence E. Levine      Director                                  --
First International
  Capital Ltd.
130 Sunrise Avenue
Palm Beach, FL  33480


         (c)      Not Applicable.

Item 30.          Location of Accounts and Records.

         All accounts,  books and other  documents  required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder are
maintained at the offices of:

         The 59 Wall Street Fund, Inc.
         6 St. James Avenue
         Boston, MA 02116

         Brown Brothers Harriman & Co.
         59 Wall Street
         New York, NY 10005
            (investment adviser, eligible institution
            and shareholder servicing agent)

         59 Wall Street Distributors, Inc.
         6 St. James Avenue
         Boston, MA 02116
            (distributor)

         59 Wall Street Administrators, Inc.
         6 St. James Avenue
         Boston, MA 02116
         (subadministrator)

         State Street Bank and Trust Company
         1776 Heritage Drive
         North Quincy, MA 02171
        (custodian and transfer agent)

Item 31.          Management Services.

         Other  than  as  set  forth  under  the  caption   "Management  of  the
Corporation"  in  the  Prospectus   constituting  Part  A  of  the  Registration
Statement, Registrant is not a party to any management-related service contract.

Item 32.          Undertakings.

         (a) The  Registrant  undertakes  to  furnish  to each  person to whom a
prospectus  is  delivered a copy of the  Registrant's  latest  annual  report to
shareholders upon request and without charge.


   
         (b) The Registrant undertakes to file a post-effective amendment,
including financials, which need not be certified, within four to six months
following the commencement of operations of each of its series. The financial
statements included in such amendment will be as of and for the time period
ended on a date reasonably close or as soon as practicable to the date of the
amendment.
    

                                       C-6
<PAGE>
   
                                   SIGNATURES


         Pursuant to the requirements of the Securities Act of 1933, as amended
and the Investment Company Act of 1940, as amended, the Registrant certifies
that it meets all the requirements for effectiveness of this Post-Effective 
Amendment to its Registration Statement on Form N-1A ("Registration Statement")
pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused 
this amendment to its Registration Statement to be signed on its behalf by the
undersigned, thereto duly authorized, in the City of New York and State of New 
York on the 3rd day of November, 1997.

        

                                                THE 59 WALL STREET FUND, INC.

                                                 By /s/ PHILIP W. COOLIDGE
                                                (Philip W. Coolidge, President)


         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Registration  Statement  has been signed below by the  following  persons in the
capacities and on the date indicated above.

Signature                                     Title

/s/ J.V. SHIELDS, JR.                         Director and Chairman of
 (J.V. Shields, Jr.)                          the Board



/s/ PHILIP W. COOLIDGE                        President (Principal
(Philip W. Coolidge)                          Executive Officer)



/s/ EUGENE P. BEARD                           Director
(Eugene P. Beard)


/s/ DAVID P. FELDMAN                          Director
(David P. Feldman)


/s/ ARTHUR D. MILTENBERGER                    Director
(Arthur D. Miltenberger)


/s/ ALAN D. LOWY                              Director
(Alan D. Lowy)

/S/ JOHN R. ELDER                             Treasurer
(John R. Elder)


<PAGE>
   
                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant has duly caused this registration
statement to be signed on its behalf by the undersigned, thereto duly authorized
in the Paget, Bermuda on the 3rd day of November, 1997.
   

                              U.S. MID-CAP PORTFOLIO

                              By /s/SUSAN JAKUBOSKI
                             (Susan Jakuboski, Assistant Treasurer)


         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Registration  Statement  has been signed below by the  following  persons in the
capacities and on the date indicated above.

Signature                                     Title

PHILIP W. COOLIDGE*                      President of the Portfolio
(Philip W. Coolidge)


H.B. ALVORD*                            Trustee and Chairman of the Board
(H.B. Alvord)                           


RICHARD L. CARPENTER*                   Trustee
(Richard L. Carpenter)                        


CLIFFORD A. CLARK*                      Trustee
(Clifford A. Clark)


DAVID M. SEITZMAN*                      Trustee
(David M. Seitzman)


JOHN R. ELDER*                          Treasurer of the Portfolio
(John R. Elder)


*By: /s/SUSAN JAKUBOSKI
     Susan Jakuboski as Attorney-in-Fact pursuant to
     Powers of Attorney filed previously.

     

<PAGE>


                               INDEX TO EXHIBITS


9(a)(1)   Appendix A to Amended and Restated Administration Agreement.

11        Consent of Deloitte & Touche, Grand Cayman.

16        Schedule for Computation of Performance Quotations.





                                                    APPENDIX A



                                    Annual Fee                     Annual Fee
                                    prior to con-                  after con-
                                    version to a                   version to a
                                    Two-Tiered                     Two-Tiered
                                    Mutual Fund                    Mutual Fund
NAME OF FUND                        Structure                      Structure

The 59 Wall Street
Small Company Fund                  0.15%                              0.125%

The 59 Wall Street
Pacific Basin
Equity Fund                         0.15%                              0.125%

The 59 Wall Street
European Equity
Fund                                0.15%                              0.125%

The 59 Wall Street
U.S. Equity Fund                    0.15%                              0.125%

The 59 Wall Street
Inflation-Indexed
Securities Fund                     0.10%                              0.07%

The 59 Wall Street
International Equity
Fund1                               N/A                                0.125%

The 59 Wall Street
Emerging Markets Equity
Fund2                               N/A                                0.125%

The 59 Wall Street
Mid-Cap Fund3                       N/A                                0.125%


For informational purposes only:


The 59 Wall Street
Money Market Fund                   0.10%                              0.075%

The 59 Wall Street
U.S. Treasury
Money Fund                          0.10%                              0.075%

The 59 Wall Street
Tax Free
Short/Intermediate
Fixed Income Fund                   0.15%                              0.125%

- --------
1Added August 23, 1994.
2Added February 18, 1997
3Added August 19, 1997

WS5170C

DELOITTE & TOUCHE   
- -----------------                -------------------------------------------- 
            LOGO                 One Capital Place   Telephone: 345-949-7500
                                 P.O. Box 1787 GT    Facsimile: 345-949-8238
                                 Grand Cayman
                                 Cayman Islands, B.W.I.


                                                            EXHIBIT 11


INDEPENDENT AUDITORS' CONSENT  

We consent to the inclusion in this Post-Effective Amendment No. 11 to 
Registration Statement (No. 811-06139) of The 59 Wall Street Fund, Inc. on
behalf of The 59 Wall Street Mid-Cap Fund (one of the series constituting The 
59 Wall Street Fund, Inc.) of our report dated November 3, 1997, relating to 
the U.S. Mid-Cap Portfolio, appearing in the Statement of Additional 
Information, which is a part of such Registration Statement.

/S/DELOITTE & TOUCHE
Grand Cayman, Cayman Islands
November 3, 1997




                      SCHEDULE OF COMPUTATION OF PERFORMANCE COMPUTATIONS

         TOTAL RETURN

         Quotations of average annual total return for a Fund will be expressed
in terms of the average annual compounded rate of return of a hypothetical
investment in the Fund over periods of 1, 5 and 10 years (or fractional portion
thereof), calculated pursuant to the following formula:

                         P(1+T)n=ERV

where             P =      a hypothetical initial payment of $1,000,

                  T =      the average annual total return,

                  n =      the number of years, and

                ERV =      the ending redeemable value of a hypothetical
                           $1,000 payment made at the beginning of the period.

       


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