MAINSTREET BANKGROUP INC
S-4, 1998-05-27
STATE COMMERCIAL BANKS
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      As filed with the Securities and Exchange Commission on May 27, 1998.
                                                      Registration No. 333-_____
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                          -----------------------------
                                    Form S-4
                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933
                          -----------------------------

                        MAINSTREET BANKGROUP INCORPORATED
             (Exact name of registrant as specified in its charter)

        VIRGINIA                         6711                    54-1046817
(State or other jurisdiction  (Primary Standard Industrial   (I.R.S.  Employer
     of incorporation)        Classification Code Number)    Identification No.)

                             200 East Church Street
                          Martinsville, Virginia 24112
                                 (540) 666-6724

          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)

                               Rebecca J. Jenkins
                     Executive Vice President and Secretary
                             200 East Church Street
                          Martinsville, Virginia 24112
                                 (540) 666-3272
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

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


<PAGE>



                                   Copies to:

Douglas W.  Densmore and                          Brian D. Alprin
Hugh B. Wellons                                   Duane, Morris & Heckscher LLP
Flippin, Densmore, Morse,                         1667 K Street, N.W., Suite 700
  Rutherford & Jessee                             Washington, D.C. 20006-1820
300 First Campbell Square                         (202) 776-7800
Roanoke, Virginia  24011
(540) 510-3000

        Approximate date of commencement of proposed sale to the public:
   From time to time after the effective date of this Registration Statement.

                 If the securities being registered on this form
             are being offered in connection with the formation of a
                  holding company and there is compliance with
               General Instruction G, check the following box. [ ]
<TABLE>
<S> <C>
                                           CALCULATION OF REGISTRATION FEE
===================================================================================================================
Title of each class                               Proposed             Proposed maximum             Amount of
of securities to be       Amount to be       maximum offering           aggregate offering         Registration
     registered           registered(1)        price per unit                 price(2)                  Fee
- -------------------------------------------------------------------------------------------------------------------
Common Stock               796,781 shs              10.43                  $8,314,843                  $2,453
(including associated
 rights issued under the
 MSBC Preferred Share
 Rights Plan)
===================================================================================================================
</TABLE>
(1)      This  Registration  Statement  covers the  maximum  number of shares of
         Common  Stock of the  Registrant  which  are  expected  to be issued in
         connection with the transactions described herein.

(2)      Estimated  in  accordance  with  Rule  457(f)(2)  for  the  purpose  of
         calculating  the  registration  fee, with the value of Ballston  Common
         Stock being  exchanged in the  transaction  for MSBC Common Stock being
         based upon the book value of Ballston  Common  Stock at March 31, 1998,
         of $8,314,843, the latest practical date prior to filing.

         THE REGISTRANT HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE
OR DATES AS MAY BE NECESSARY TO DELAY ITS  EFFECTIVE  DATE UNTIL THE  REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT, OR UNTIL THE  REGISTRATION  STATEMENT SHALL BECOME EFFECTIVE
ON SUCH DATE AS THE  COMMISSION,  ACTING  PURSUANT  TO SAID  SECTION  8(A),  MAY
DETERMINE.




<PAGE>

                             BALLSTON BANCORP, INC.
                         1667 K Street, N.W., Suite 700
                             Washington, D.C. 20006

                           ________________ ___, 1998

To the Shareholders of
Ballston Bancorp, Inc.

         You are cordially  invited to attend the Annual Meeting of Shareholders
(the  "Annual  Meeting") of Ballston  Bancorp,  Inc.  ("Ballston"),  the holding
company for The Bank of Northern  Virginia  ("The Bank"),  which will be held on
_____________  ____, 1998 at ____:____ p.m.,  local time at The Bank of Northern
Virginia, 1010 North Glebe Road, Arlington, Virginia.


         At the Annual  Meeting,  you will be asked to consider  and vote upon a
proposal  to approve  the  Agreement  and Plan of Merger,  dated as of March 11,
1998,  and the related  Plan of Merger  (collectively,  the "Merger  Agreement")
pursuant  to  which  Ballston  will be  merged  (the  "Merger")  with  and  into
MainStreet  BankGroup  Incorporated  ("MSBC").  Under  the  terms of the  Merger
Agreement,  each share of common stock,  par value $0.20 per share,  of Ballston
will be  converted  into that  fraction of a share of MSBC common stock having a
market value of $12.04,  provided  that a minimum of 0.4025 shares and a maximum
of 0.4920  shares of MSBC common stock will be issued for each share of Ballston
common  stock.  Cash  will be paid in  lieu of the  issuance  of any  fractional
shares.

         Danielson  Associates Inc., an investment  banking firm, has issued its
opinion to your board of directors regarding the fairness from a financial point
of view of the  consideration  to be  received by the  shareholders  of Ballston
pursuant to the Merger  Agreement as of the date of such opinion.  A copy of the
opinion is attached as Appendix II to the Proxy Statement/Prospectus.

         THE BOARD OF DIRECTORS HAS UNANIMOUSLY  (WITH ONE DIRECTOR NOT PRESENT)
APPROVED THE PROPOSED MERGER AND RECOMMENDS THAT  SHAREHOLDERS VOTE THEIR SHARES
"FOR" APPROVAL OF THE MERGER.  THE AFFIRMATIVE  VOTE OF A MAJORITY OF BALLSTON'S
OUTSTANDING  SHARES  ENTITLED  TO VOTE  IS  NECESSARY  TO  APPROVE  THE  MERGER.
ACCORDINGLY,  FAILURE TO VOTE, EITHER BY FAILING TO RETURN YOUR PROXY OR FAILING
TO VOTE IN PERSON AT THE  ANNUAL  MEETING,  WILL HAVE THE SAME  EFFECT AS A VOTE
AGAINST THE MERGER.

         At the Annual Meeting, you will also be asked to consider and vote upon
the  election of  directors  to serve on the Board of  Directors  until the next
annual  meeting or their  successors  are elected and  qualified or, if earlier,
until consummation of the Merger, and the appointment of Stoy, Malone & Company,
P.C. as the  independent  auditors of  Ballston  for 1998 or, if earlier,  until
consummation of the Merger.

         The accompanying Notice of Annual Meeting of Shareholders and the Proxy
Statement/Prospectus  describe  the  matters  to be  acted  upon  at the  Annual
Meeting.   Shareholders  are  urged  to  review  carefully  the  attached  Proxy
Statement/Prospectus,  including the  Appendices,  which  together  describe the
Merger and its terms and conditions in detail.

                               Sincerely,


                               Robert F.  Kelleher
                               Chairman of the Board, President and Chief 
                               Executive Officer


                                       i
<PAGE>
                             BALLSTON BANCORP, INC.
                         1667 K Street, N.W., Suite 700
                             Washington, D.C. 20006

                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                      TO BE HELD ON _____________ ___, 1998

To the Holders of Common Stock of Ballston Bancorp, Inc.

NOTICE IS HEREBY  GIVEN that the Annual  Meeting of  Shareholders  (the  "Annual
Meeting") of Ballston Bancorp,  Inc.  ("Ballston") will be held on ________ ___,
1998, at ___:___ p.m., local time at The Bank of Northern  Virginia,  1010 North
Glebe  Road,  Arlington,  Virginia.  The Annual  Meeting  is for the  purpose of
considering  and voting upon the following  matters,  each of which is set forth
more completely in the accompanying Proxy Statement/Prospectus:

1. To approve the Agreement and Plan of Merger,  dated as of March 11, 1998, and
the related Plan of Merger  (collectively,  the "Merger Agreement")  pursuant to
which Ballston will be merged (the "Merger") with and into MainStreet  BankGroup
Incorporated  ("MSBC").  Under the terms of the Merger Agreement,  each share of
common stock, par value $0.20 per share, of Ballston will be converted into that
fraction  of a share of MSBC  common  stock  having a  market  value of  $12.04,
provided  that a minimum of 0.4025 shares and a maximum of 0.4920 shares of MSBC
common stock will be issued for each share of Ballston  common stock.  Cash will
be paid in lieu of  issuance  of  fractional  shares.  The Merger  Agreement  is
attached   as  Appendix  I  and  is   described   in  the   accompanying   Proxy
Statement/Prospectus.

2. To elect the directors to serve until the 1999 annual meeting of shareholders
or their  successors  have been elected and qualified or, if earlier,  until the
consummation of the Merger.

3. To ratify  the  appointment  of Stoy,  Malone &  Company,  P.C.,  to serve as
independent  auditors of Ballston  for the fiscal year ending  December 31, 1998
or, if earlier, until the consummation of the Merger.

4. To  transact  such other  business  as may  properly  come  before the Annual
Meeting or any adjournment or postponement thereof.

         Only  shareholders  of record at the close of  business  on the  record
date,  _____________  _____,  1998, are entitled to notice of and to vote at the
Annual Meeting and any adjournments thereof. The affirmative vote of the holders
of a majority of outstanding Ballston Common Stock entitled to vote is necessary
to approve the Merger. Accordingly, failure to vote, either by failing to return
your proxy or failing  to vote in person at the  Annual  Meeting,  will have the
same effect as a vote against the Merger.  We urge you to execute and return the
enclosed  proxy  as  soon  as  possible  to  ensure  that  your  shares  will be
represented  at the  Annual  Meeting.  Your  proxy may be  revoked in the manner
described in the accompanying Proxy  Statement/Prospectus  at any time before it
has been voted at the Annual Meeting.

                             By Order of the Board of Directors

                             Brian D. Alprin
                             Treasurer and Secretary

Washington, D.C.
______________ ____, 1998

         THE BOARD OF  DIRECTORS  UNANIMOUSLY  RECOMMENDS  THAT YOU VOTE FOR THE
PROPOSAL STATED ABOVE.  PLEASE SIGN AND RETURN THE ENCLOSED PROXY AS PROMPTLY AS
POSSIBLE,  WHETHER OR NOT YOU PLAN TO ATTEND THE ANNUAL  MEETING IN PERSON.  YOU
MAY REVOKE YOUR PROXY AT ANY TIME BEFORE IT IS VOTED AT THE ANNUAL MEETING.

                                       ii
<PAGE>


                           Proxy Statement/Prospectus
                                 Proxy Statement
                                       of
                             BALLSTON BANCORP, INC.

                      For a Annual Meeting of Shareholders
                      To Be Held on ___________ ____, 1998

                        MAINSTREET BANKGROUP INCORPORATED
                                   Prospectus

         Up to 796,781 Shares of Common Stock, $5.00 Par Value Per Share

         This    combined    Proxy    Statement    and    Prospectus     ("Proxy
Statement/Prospectus")  is being furnished to the holders of common stock, $0.20
par value per share  ("Ballston  Common  Stock") of Ballston  Bancorp,  Inc.,  a
Delaware  corporation  ("Ballston"),  in  connection  with the  solicitation  of
proxies  by the Board of  Directors  of  Ballston  ("Ballston's  Board"  or, the
"Board") for use at the Annual Meeting of Shareholders of Ballston to be held on
____________,  ____,  1998, at ___:___ p.m.,  local time at The Bank of Northern
Virginia, 1010 North Glebe Road, Arlington,  Virginia, or at any adjournments or
postponements  thereof (the "Annual Meeting").  This Proxy  Statement/Prospectus
and accompanying  form of proxy ("Proxy") are first being mailed to shareholders
of  Ballston  as of  ___________  ____,  1998  (the  "Record  Date") on or about
_________ ____, 1998.

         At the Annual  Meeting,  you will be asked to consider  and vote upon a
proposal  to approve  the  Agreement  and Plan of Merger,  dated as of March 11,
1998,  and the related  Plan of Merger  (collectively,  the "Merger  Agreement")
pursuant  to  which  Ballston  will be  merged  (the  "Merger")  with  and  into
MainStreet  BankGroup  Incorporated  ("MSBC").  Under  the  terms of the  Merger
Agreement,  each share of common stock,  par value $0.20 per share,  of Ballston
will be  converted  into that  fraction of a share of MSBC common stock having a
market value of $12.04,  provided  that a minimum of 0.4025 shares and a maximum
of 0.4920  shares of MSBC common stock will be issued for each share of Ballston
Common Stock (the "Exchange  Ratio").  Cash will be paid in lieu of the issuance
of any fractional  shares.  For a more detailed  description of the terms of the
Merger, see "Proposal I - The Merger."

         At the Annual Meeting, you will also be asked to consider and vote upon
the  election of  directors  to serve on the Board of  Directors  until the next
annual  meeting or their  successors  are elected and  qualified or, if earlier,
until consummation of the Merger, and the appointment of Stoy, Malone & Company,
P.C. as the  independent  auditors of  Ballston  for 1998 or, if earlier,  until
consummation of the Merger.

         This Proxy Statement also constitutes a prospectus of MSBC with respect
to up to 796,781  shares of MSBC common stock,  $5.00 par value per share ("MSBC
common stock"), that will be issued in connection with the Merger.

         THE SHARES OF MSBC  COMMON  STOCK TO BE ISSUED  PURSUANT  TO THE MERGER
AGREEMENT  HAVE NOT BEEN APPROVED OR  DISAPPROVED BY THE SECURITIES AND EXCHANGE
COMMISSION NOR HAS THE  COMMISSION  PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROXY  STATEMENT/PROSPECTUS.  ANY  REPRESENTATION  TO THE CONTRARY IS A CRIMINAL
OFFENSE.

         THE  SHARES  OF MSBC  COMMON  STOCK  OFFERED  HEREBY  ARE  NOT  SAVINGS
ACCOUNTS, DEPOSITS OR OTHER OBLIGATIONS OF A BANK OR SAVINGS ASSOCIATION AND ARE
NOT  INSURED  BY  THE  FEDERAL  DEPOSIT  INSURANCE   CORPORATION  OR  ANY  OTHER
GOVERNMENTAL AGENCY.

      THE DATE OF THIS PROXY STATEMENT/PROSPECTUS IS ______________, 1998.

                                      iii
<PAGE>

         This  Proxy  Statement/Prospectus  does not  cover  any  resale  of the
securities to be received by shareholders  of Ballston upon  consummation of the
proposed transaction,  and no person is authorized to make any use of this Proxy
Statement/Prospectus in connection with any such resale.

         No persons have been  authorized to give any information or to make any
representations other than those contained in this Proxy Statement/Prospectus or
incorporated by reference  herein in connection with the solicitation of proxies
or the  offering  of  securities  made  hereby  and,  if  given  or  made,  such
information or representations must not be relied upon as having been authorized
by MSBC or Ballston.  This Proxy  Statement/Prospectus  does not  constitute  an
offer to sell,  or a  solicitation  of an offer to buy, any  securities,  or the
solicitation of a proxy, in any jurisdiction to or from any person to whom it is
not lawful to make any such offer or solicitation in such jurisdiction.  Neither
the  delivery  of  this  Proxy  Statement/Prospectus  nor  any  distribution  of
securities made hereunder shall, under any circumstances,  create an implication
that there has been any change in the affairs of MSBC or Ballston since the date
hereof. All information contained in this Proxy Statement/Prospectus relating to
Ballston and its  subsidiary  has been supplied by Ballston and all  information
contained  in  this  Proxy   Statement/Prospectus   relating  to  MSBC  and  its
subsidiaries has been supplied by MSBC.

                              AVAILABLE INFORMATION

         MSBC is subject to the  informational  requirements  of the  Securities
Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in  accordance
therewith  files reports,  proxy  statements,  information  statements and other
information with the Securities and Exchange Commission (the "Commission"). Such
reports, proxy statements,  information  statements and other information,  when
filed, can be inspected and copied at the public reference facilities maintained
by the Commission at Room 1024, 450 Fifth Street, N.W.,  Washington,  D.C. 20549
and the Commission's  Regional offices in New York (7 World Trade Center,  Suite
1300, New York, New York 10048) and Chicago (Citicorp  Center,  500 West Madison
Street,  Suite 1400,  Chicago,  Illinois 60661). The Commission  maintains a Web
site  that  contains  reports,   proxy  and  information  statements  and  other
information  regarding  registrants that file electronically with the Commission
and the  address of such site is  http://www.sec.gov.  In  addition,  the common
stock of MSBC is listed on the Nasdaq Stock Market and reports, proxy statements
and other  information  concerning  MSBC can be  inspected at the offices of the
National  Association  of  Securities  Dealers,   Inc.,  1735  K  Street,  N.W.,
Washington, D.C. 20006.

         MSBC has filed with the Commission a registration statement on Form S-4
under the Securities Act of 1933, as amended (the "Securities  Act"), in respect
to the  MSBC  common  stock  to be  issued  in  the  Merger  (the  "Registration
Statement").  As permitted by the rules and regulations of the Commission,  this
Proxy Statement/Prospectus omits certain information,  exhibits and undertakings
contained in the Registration Statement. For such information, reference is made
to the  Registration  Statement  and the  exhibits  filed as a part  thereof  or
incorporated by reference therein.

                                       iv
<PAGE>



                INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

         The following documents or portions of documents filed by MSBC with the
Commission  are hereby  incorporated  by reference  into and made a part of this
Proxy Statement/Prospectus.

     1.   Annual  Report on Form 10-K for the  fiscal  year ended  December  31,
          1997.

     2.   Quarterly  Report on Form 10-Q for the fiscal  quarter ended March 31,
          1998.

     3.   Current  Reports on Form 8-K dated  March 5, 1998,  March 13, 1998 and
          March 13, 1998.

     4.   The  description of the MSBC Preferred  Share Rights Plan contained on
          Form 8-K  filed  pursuant  to  Section  12(g) of the  Exchange  Act on
          January 19, 1990,  including all amendments  thereto and reports filed
          under the Exchange Act for the purpose of updating such description.

         All documents  filed by MSBC pursuant to Section  13(a),  13(c),  14 or
15(d) of the Exchange Act after the date of this Proxy  Statement/Prospectus and
prior  to the  date  of the  Ballston  Annual  Meeting  shall  be  deemed  to be
incorporated by reference into this Proxy  Statement/Prospectus and to be a part
hereof from the  respective  dates of filing of such  documents.  Any  statement
contained in a document  incorporated  or deemed to be incorporated by reference
herein shall be deemed to be modified or  superseded  for purposes of this Proxy
Statement/Prospectus  to the extent that a statement contained herein, or in any
other   subsequently   filed  document  that  is  also  incorporated  or  deemed
incorporated by reference  herein,  modifies or supersedes  such statement.  Any
such  statement  so modified  or  superseded  shall not be deemed,  except as so
modified or superseded, to constitute a part of this Proxy Statement/Prospectus.

         This Proxy  Statement/Prospectus  (including  information  included  or
incorporated by reference  herein) contains certain  forward-looking  statements
with  respect  to  the  financial  condition,  results  of  operations,   plans,
objectives,  future  performance  and  businesses  of each of MSBC and Ballston.
These  forward-looking  statements  involve  certain  risks  and  uncertainties.
Factors  that  may  cause  actual  results  to  differ   materially  from  those
contemplated  by such  forward-looking  statements  include,  among others,  the
following  possibilities:  (1)  competitive  pressure  in the  banking  industry
increases  significantly;  (2) changes in the interest rate  environment  reduce
margins; (3) general economic conditions,  either nationally or regionally,  are
less favorable than expected,  resulting in, among other things, a deterioration
in credit quality; (4) changes occur in the regulatory environment;  (5) changes
occur  in  business  conditions  and  inflation;  and (6)  changes  occur in the
securities markets.

         THIS PROXY  STATEMENT/PROSPECTUS  INCORPORATES  DOCUMENTS  BY REFERENCE
WHICH ARE NOT PRESENTED  HEREIN OR DELIVERED  HEREWITH.  THE MSBC  DOCUMENTS ARE
AVAILABLE (WITHOUT CHARGE) UPON WRITTEN REQUEST TO REBECCA J. JENKINS, EXECUTIVE
VICE PRESIDENT AND SECRETARY, MAINSTREET BANKGROUP INCORPORATED, 200 EAST CHURCH
STREET, MARTINSVILLE,  VIRGINIA 24112. IN ORDER TO ENSURE TIMELY DELIVERY OF THE
DOCUMENTS, ANY REQUESTS MUST BE RECEIVED BY ____________ ____, 1998.

                                       v
<PAGE>
<TABLE>



                                                  TABLE OF CONTENTS

                                                                                                                             Page
                                                                                                                             ----
<S> <C>
AVAILABLE INFORMATION.........................................................................................................iv
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE..............................................................................v
SUMMARY........................................................................................................................1
   The Companies...............................................................................................................1
   Ballston Annual Meeting.....................................................................................................1
     Time, Date, Place and Purpose.............................................................................................1
     Record Date; Vote Required................................................................................................2
     Stock Held By Ballston Affiliates.........................................................................................2
   THE MERGER..................................................................................................................2
   Effective Date..............................................................................................................2
   Merger Consideration........................................................................................................2
   Exchange of Certificates; Delivery of MSBC Common Stock and Payment for Fractional Shares...................................3
   Opinion of Ballston's Financial Advisor.....................................................................................3
   Federal Income Tax Consequences.............................................................................................3
   Accounting Treatment........................................................................................................3
   Conditions to the Merger....................................................................................................3
   Effect of the Merger on Shareholders' Rights................................................................................4
   Rights of Dissenting Shareholders...........................................................................................4
   Interests of Certain Persons in the Merger..................................................................................4
COMPARATIVE MARKET AND STOCK PRICE INFORMATION.................................................................................4
COMPARATIVE PER SHARE INFORMATION..............................................................................................5
COMPARATIVE PER SHARE DATA.....................................................................................................6
SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA..................................................................................7
MAINSTREET BANKGROUP INCORPORATED SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA................................................8
BALLSTON BANCORP, INC. SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA..........................................................10
INTRODUCTION..................................................................................................................11
BALLSTON ANNUAL MEETING.......................................................................................................11
   Record Date; Vote Required.................................................................................................11
   Proxies; Revocation; Solicitation..........................................................................................12
PROPOSAL I - THE MERGER.......................................................................................................12
   General....................................................................................................................13
   Background of the Merger...................................................................................................13
   Reasons for the Merger.....................................................................................................14
   Opinion of Ballston's Financial Advisor....................................................................................16
   Conditions to Consummation of the Merger; Waiver...........................................................................18
   No Solicitation of Transactions............................................................................................19
   Stock Option Agreement.....................................................................................................19
   MSBC's Acquisition Program.................................................................................................20
   Exchange Ratio Termination.................................................................................................20
   Termination................................................................................................................21
   Federal Income Tax Consequences............................................................................................21
   Exchange of Certificates; Payment for Fractional Shares....................................................................22
   Accounting Treatment.......................................................................................................23
   Regulatory Approvals.......................................................................................................23
   Interests of Certain Persons in the Merger.................................................................................23
   Resales by Affiliates......................................................................................................25
   Rights of Dissenting Shareholders..........................................................................................26

                                                               vi
<PAGE>

   Description of MSBC Capital Stock..........................................................................................27
   Common Stock...............................................................................................................27
   Trust Preferred Offering...................................................................................................29
   Comparative Rights of Shareholders.........................................................................................29
DESCRIPTION OF THE COMPANIES..................................................................................................36
   MainStreet BankGroup Incorporated..........................................................................................36
   Ballston Bancorp, Inc......................................................................................................36
PROPOSAL II - ELECTION OF DIRECTORS...........................................................................................36
   Meetings and Committees of the Ballston Board..............................................................................38
   Board Compensation.........................................................................................................38
   Executive Compensation.....................................................................................................38
   Profit Sharing and Savings Plan............................................................................................39
   Certain Transactions with Ballston.........................................................................................39
PROPOSAL III - RATIFICATION OF APPOINTMENT OF AUDITORS........................................................................39
EXPERTS.......................................................................................................................39
LEGAL MATTERS.................................................................................................................40
OTHER MATTERS.................................................................................................................40
APPENDICES
         Appendix   I      - Agreement and Plan of Merger
         Appendix  II      - Opinion of Financial Advisor
         Appendix III      - Rights of Dissenting Shareholders
         Appendix IV       - Ballston Bancorp, Inc.

</TABLE>

                                                               vii
<PAGE>

                                     SUMMARY

         The following is a brief summary of the matters to be considered at the
Annual Meeting.  This summary is not intended to be complete and is qualified in
its  entirety  by  reference  to, and should be read in  conjunction  with,  the
detailed information, including the Appendices hereto, contained or incorporated
by reference herein. A copy of the Merger Agreement is attached as Appendix I to
this Proxy  Statement/Prospectus.  Shareholders  are urged to read carefully the
entire Proxy  Statement/Prospectus.  As used in this Proxy Statement/Prospectus,
the terms "MSBC" and "Ballston" refer to such  corporations,  respectively,  and
where  the  context  requires  such  corporations  and their  subsidiaries  on a
consolidated basis.

The Companies

MSBC

         MSBC is a multi-bank  holding company  headquartered  in  Martinsville,
Virginia,  with total assets of $2.0 billion and total  shareholders'  equity of
$155.3  million at March 31, 1998.  Organized  in 1977,  MSBC through its eleven
affiliate banks (the "MainStreet Banks"), and MainStreet Trust Company, National
Association, a nationally chartered trust company (the "Trust Company"), engages
in a general banking business and, through its eleven affiliate banks,  provides
a broad  spectrum  of  full-service  banking and trust  services  to  consumers,
businesses,  institutions and governments,  including accepting demand,  savings
and time  deposits;  making  commercial,  personal,  installment,  mortgage  and
construction loans; issuing letters of credit; and providing discount brokerage,
trust services,  bank-card services,  mortgage banking and investment  services.
MSBC's  principal  executive  offices  are  located at 200 East  Church  Street,
Martinsville,  Virginia 24112 and its telephone  number is (540) 666-6724.  MSBC
common stock is traded on Nasdaq  National Stock Market under the symbol "MSBC."
See  "Incorporation  of  Certain   Information  By  Reference,"  for  additional
information about MSBC.

Ballston

         Ballston is a one-bank  holding  company  headquartered  in Washington,
D.C., with total assets of $75.7 million and total stockholders'  equity of $8.3
million at March 31, 1998.  Organized  in 1987,  Ballston  operates  through its
wholly-owned  subsidiary,  The Bank of Northern  Virginia  ("The  Bank"),  which
operates as a  commercial  bank in Arlington  and Falls  Church,  Virginia.  The
Bank's primary business consists of attracting  deposits from the general public
and  originating  loans that are secured by  residential  properties  as well as
originating  commercial  real estate and consumer  loans.  Ballston's  principal
executive  offices are located at 1667 K Street,  N.W.,  Suite 700,  Washington,
D.C.  20006 and its telephone  number is (202)  776-7800.  See  "Description  of
Ballston."

                             Ballston Annual Meeting

Time, Date, Place and Purpose

         The Annual  Meeting will be held on , 1998 at : p.m.  local time at The
Bank of  Northern  Virginia,  1010 North  Glebe Road,  Arlington,  Virginia,  to
consider  and vote upon a proposal  to  approve  the  Merger  Agreement  and the
transactions  contemplated  thereby.  A copy of the Merger Agreement is attached
hereto as Appendix I.

                                       1
<PAGE>


Record Date; Vote Required

         The record date ("Record Date") for determining  Ballston  shareholders
entitled to notice of and to vote at the Annual  Meeting is , 1998. The presence
in person or by proxy of the holders of forty  percent (40%) of the total number
of issued and  outstanding  shares of  Ballston  Common  Stock is  necessary  to
constitute  a quorum at the Annual  Meeting.  Assuming a quorum is  present,  an
affirmative  vote of at least a majority of the outstanding  shares is necessary
to approve  the Merger  Agreement.  As of the Record  Date,  the  directors  and
executive officers and their affiliates  beneficially own approximately 48.5% of
Ballston  Common Stock. In addition,  an affirmative  vote of a plurality of the
votes cast is necessary to elect the  directors and an  affirmative  vote of the
majority of the votes cast is necessary for the ratification of auditors. In the
event a quorum is not  present or there are  insufficient  votes to approve  any
proposal, the Annual Meeting may be adjourned from time to time by a majority of
those present in person or by proxy in order to permit, as appropriate,  further
solicitation of proxies by the Ballston Board.

Stock Held By Ballston Affiliates

         The directors and executive  officers of Ballston and their  affiliates
beneficially owned, as of the Record Date, 784,716 shares, or 48.5%, of Ballston
Common  Stock.  The  directors  and  executive  officers  of  Ballston  have all
indicated that they will vote their shares of Ballston  Common Stock in favor of
the proposal to approve the Merger Agreement.

                                   THE MERGER

Effective Date

         The Merger is expected to be consummated  late in the second quarter or
early in the third  quarter  of 1998.  Subject to the terms and  conditions  set
forth herein, including receipt of all required regulatory approvals, the Merger
shall  become  effective  on the date and time the  Virginia  State  Corporation
Commission  ("SCC")  issues a certificate  of merger  reflecting the Merger (the
"Effective Date"). Ballston and MSBC each has the right, acting unilaterally, to
terminate  the  Agreement  should the Merger not be completed  by September  30,
1998. See Proposal I - "The Merger - Termination."

Merger Consideration

         Under the terms of the  Merger  Agreement,  each  outstanding  share of
Ballston  Common  Stock has been  valued at  $12.04.  The number of shares to be
delivered for each share of Ballston Common Stock will be determined by dividing
$12.04 by the  average of the mean  between the bid price and the asked price as
reported on the Nasdaq  National  Stock  Market for each of the 20 trading  days
preceding the tenth  calendar day prior to the Effective Date (the "Average MSBC
Share Price"). If such quotient is less than 0.4025, the Exchange Ratio shall be
0.4025 and if such  quotient is more than 0.4920,  the  Exchange  Ratio shall be
0.4920.  The  Exchange  Ratio will be  adjusted  to reflect  any  consolidation,
split-up,  other subdivisions or combinations of MSBC common stock, any dividend
payable in MSBC  common  stock,  or any  capital  reorganization  involving  the
reclassification of MSBC common stock. See "Proposal I - The Merger - General."


                                       2
<PAGE>


         On , 1998, the most recent date for which it was  practicable to obtain
market price data prior to the printing of this Proxy Statement/Prospectus,  the
closing sales price per share of MSBC common stock was .

Exchange  of  Certificates;  Delivery  of MSBC  Common  Stock  and  Payment  for
Fractional Shares

         As soon as  practicable  after the  Effective  Date,  MSBC shall  cause
Registrar  and Transfer  Company,  Post Office Box 1010,  Cranford,  New Jersey,
acting as the exchange  agent (the "Exchange  Agent"),  to mail to each Ballston
shareholder  (other than  dissenting  shareholders)  a letter of transmittal and
instructions   for  use  in  order  to  surrender  the   certificates   formerly
representing  shares of Ballston Common Stock.  Cash (without  interest) will be
paid to Ballston  shareholders in lieu of the issuance of any fractional  shares
in an amount equal to the fraction of a share of MSBC common stock to which such
shareholder  would  otherwise be entitled  multiplied  by the Average MSBC Share
Price.  See  "Proposal  I - The Merger - Exchange of  Certificates;  Payment for
Fractional Shares."

Opinion of Ballston's Financial Advisor

         Ballston  engaged  Danielson  Associates Inc.  ("Danielson")  to render
financial  advisory and investment  banking services in connection with Ballston
management's decision to explore various methods to enhance Ballston shareholder
value. Pursuant to such engagement,  Danielson has evaluated the fairness of the
consideration  to be received by Ballston  shareholders  pursuant to the Merger.
Danielson  has  delivered to Ballston an opinion  dated March 11, 1998,  stating
that, as of such date,  based on its review and  assumptions  and subject to the
limitations  described  therein,  the  merger  consideration  was  fair,  from a
financial  point of view,  to  Ballston's  shareholders.  A copy of  Danielson's
opinion is attached as Appendix II to this Proxy Statement/Prospectus and should
be read in its  entirety.  See  "Proposal I - The Merger - Opinion of Ballston's
Financial Advisor."

Federal Income Tax Consequences

         It is anticipated that the Merger will be a tax-free reorganization for
federal income tax purposes.  Ballston's  shareholders  will receive MSBC common
stock for their Ballston  Common Stock under the terms of the Merger  Agreement.
Upon this conversion,  Ballston's  shareholders will generally recognize no gain
or loss.  Upon receipt of cash for fractional  shares of Ballston  Common Stock,
Ballston's  shareholders  will recognize gain, but not in an amount in excess of
cash received. See "Proposal I - The Merger - Federal Income Tax Consequences."

Accounting Treatment

         The Merger,  when consummated,  will be accounted for under the pooling
of interests  method of  accounting.  See  "Proposal I - The Merger - Accounting
Treatment."

Conditions to the Merger

         Consummation  of the Merger is  subject,  among  other  things,  to the
approval of the Merger Agreement by the requisite vote of Ballston  shareholders
and the receipt of all requisite  regulatory approvals and satisfaction of other
conditions  contained in the Merger  Agreement.  See  "Proposal I - The Merger -
Conditions to the Merger."


                                       3
<PAGE>


Effect of the Merger on Shareholders' Rights

         If the Merger  Agreement  is  approved,  Ballston's  shareholders  will
become  shareholders  of MSBC, and their rights as  shareholders of MSBC will be
determined  by the Virginia  Corporation  Code  ("Virginia  Code") and by MSBC's
Articles of Incorporation  and Bylaws.  The rights of Ballston  shareholders are
currently  governed by the  Delaware  General  Corporation  Law  ("DGCL") and by
Ballston's Certificate of Incorporation and Bylaws. See "Proposal I - The Merger
- - Effect of the Merger on Shareholders' Rights."

Rights of Dissenting Shareholders

         Ballston's  shareholders  are entitled to exercise  dissenters'  rights
under  Section 262 of the DGCL in  connection  with the  proposal to approve the
Merger  Agreement.  See  "Proposal  I  -  The  Merger  -  Rights  of  Dissenting
Shareholders."

Interests of Certain Persons in the Merger

         Certain  members of Ballston's  management  and Board of Directors have
interests  in the Merger in addition to their  interests  as  shareholders.  See
"Proposal I - The Merger - Interests of Certain Persons in the Merger."

                 COMPARATIVE MARKET AND STOCK PRICE INFORMATION

         MSBC common  stock is quoted on the Nasdaq  National  Market  under the
symbol "MSBC." The table below sets forth, for the fiscal quarter indicated, the
high and low sales  prices for MSBC  common  stock and the  dividends  per share
declared  on such  stock in each  quarter.  The  dividends  per share  have been
restated to reflect the acquisition of Regency Financial Shares,  Inc. which was
accounted for using the pooling of interests method of accounting.  No assurance
can be given as to the  market  price of MSBC  common  stock at,  or after,  the
Effective Date.

                                                                      Cash
                                                                     Dividends
                                            Sales Price ($)(1)       Paid ($)
                                            --------------------     --------
                                            High           Low
                                            ----           ---
         1996
         Quarter Ended March 31             17.00         12.75         .10
         Quarter Ended June 30              17.00         15.50         .10
         Quarter Ended September 30         19.50         16.25         .12
         Quarter Ended December 31          19.50         16.75         .15
         1997
         Quarter Ended March 31             23.25         18.00         .13
         Quarter Ended June 30              28.00         18.75         .13
         Quarter Ended September 30         29.50         24.75         .16
         Quarter Ended December 31          30.25         26.375        .15
         1998
         Quarter Ended March 31             31.875        26.75         .15
         Quarter Ended June 30
         (through May ____, 1998)


(1)      Per share data and  historical  stock  prices have been  adjusted for a
         two-for-one  stock  split (in the form of a stock  dividend)  effective
         March 4, 1996.

                                       4
<PAGE>


         Ballston is not listed or quoted on any exchange or automatic quotation
system and no institution  makes a market in Ballston stock.  Ballston paid cash
dividends  per share of $0.025 on March  15,  1998.  In 1996 and 1997,  Ballston
declared and paid cash dividends of $.07 and $.08, respectively.

         On March 10, 1998, the last trading day before the public  announcement
of the Merger  Agreement,  the reported closing sales price of MSBC common stock
was $ 29.3125.  On , 1998, the most recent date for which it was  practicable to
obtain   market   price   data   prior   to   the   printing   of   this   Proxy
Statement/Prospectus,  the reported closing sales price per share of MSBC common
stock was $ .

         No assurance  can be given as to what MSBC average  stock price will be
during the actual Pricing Period or as to what the market price of the shares of
MSBC  common  stock  will be at the time the  Merger  is  consummated.  Ballston
shareholders are encouraged to obtain current market  quotations for MSBC common
stock.  No assurance can be given as to the market price of MSBC common stock at
or after the Effective Date.

                        COMPARATIVE PER SHARE INFORMATION

         The following  table  presents  historical and pro forma per share data
for MSBC,  restated for the pooling of interests  with Regency  Financial  Corp.
which was completed in the first quarter of 1998,  and historical and equivalent
pro forma per share  data for  Ballston.  The pro forma  combined  amounts  give
effect to an assumed  Exchange  Ratio of .4025  shares of MSBC Common  Stock for
each share of Ballston Common Stock (based on the last sale price of MSBC Common
Stock on March 31, 1998 of $31.50).  The equivalent pro forma Bank share amounts
allow  comparison of historical  information  about one share of Ballston Common
Stock to the  corresponding  data about what one share of Ballston  Common Stock
will equate to in the combined  corporation  and are computed by multiplying the
pro forma  combined  amounts  by an  assumed  Exchange  Ratio of .4025  (ratably
apportioned).  As discussed in "Proposal I -- The Merger -- General,"  the final
Exchange  Ratio will be  determined  based on the  average  MSBC Share  Price as
reported on the Nasdaq National Market for each of the 20 trading days preceding
the tenth calendar day prior to the Effective Date. The following table is based
on the  assumption  that all issued and  outstanding  shares of Ballston  Common
Stock are converted  into shares of MSBC Common  Stock.  The Merger is reflected
under the pooling of interests method of accounting and pro forma information is
derived accordingly.

         The per share data  included in the  following  table should be read in
conjunction with the consolidated  financial  statements of MSBC incorporated by
reference  herein and the financial  statements of Ballston  included herein and
the notes accompanying all such financial  statements.  The data presented below
are not  necessarily  indicative of the results of  operations  which would have
been  obtained  if the Merger had been  consummated  in the past or which may be
obtainable in the future.

                                       5
<PAGE>
<TABLE>

                                                 COMPARATIVE PER SHARE DATA
<CAPTION>
                                                                    As Of Or For Three Months      As Of Or For Years
                                                                         Ended March 31,           Ended December 31,
                                                                         ---------------           ------------------
<S> <C>
                                                                        1998        1997        1997       1996       1995
                                                                        ----        ----        ----       ----       ----
Book Value GAAP Per Share at Period End: (4) (6)
       BankGroup Historical                                            $11.65       $9.68     $10.72      $9.66      $8.77
       Ballston Historical                                               5.13        4.75       5.10       4.69       4.31
       Proforma Combined per BankGroup Common Share (1)                 11.70        9.78      10.82       9.76       8.87
       Equivalent Proforma per Bank Common Share                         4.71        3.94       4.36       3.93       3.57

Cash Dividends Declared per Share: (4) (6)
       BankGroup Historical                                              0.15        0.13       0.57       0.47       0.34
       Ballston Historical                                               0.03        0.02       0.08       0.07       0.06
       Proforma Combined per BankGroup Common Share (2)                  0.15        0.12       0.53       0.45       0.33
       Equivalent Proforma per Bank Common Share                         0.06        0.05       0.21       0.18       0.13

Net Income Per Share: (4) (5) (6)
       BankGroup Historical                                              0.38        0.34       1.35       1.38       1.17
       Ballston Historical                                               0.06        0.10       0.48       0.46       0.38
       Proforma Combined per BankGroup Common Share (3)                  0.37        0.34       1.34       1.36       1.16
       Equivalent Proforma per Bank Common Share                         0.15        0.14       0.54       0.55       0.47

- ---------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)   Proforma  combined  book value per MSBC common share  represents  combined
      common   shareholders' equity  amounts,  divided  by  pro  forma  combined
      period-end common shares outstanding.

(2)   Pro forma  combined  dividends  per MSBC common share  represent  combined
      common  dividends  declared,  divided by pro forma combined average common
      shares outstanding.

(3)   Pro forma  combined net income per MSBC common share  represents  combined
      net income available to common shareholders, divided by pro forma combined
      average common shares outstanding.

(4)   MSBC's and  Ballston's  fiscal years end December 31. Book value per share
      is as of the dates  presented,  and net income and  dividend  data reflect
      results for the periods presented.

(5)   Net  income  per  share  data is based on  diluted  shares.  Common  stock
      equivalents were utilized in the calculation of diluted shares. The common
      stock equivalents for MSBC were common stock options.

(6)   All MSBC share and per share data have been  restated to reflect a 2-for-1
      stock split in the form of a stock dividend to  shareholders  of record on
      March 4, 1996.

                                       6
<PAGE>


                  SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA

         The following  pages present  selected  financial  information  for the
years 1993  through  1997 and the three months ended March 31, 1997 and 1998 for
MSBC and  Ballston,  which  will be merged  with and into MSBC  pursuant  to the
Merger  Agreement.  The following  summary regarding MSBC and Ballston should be
read in  conjunction  with the  consolidated  financial  statements  of MSBC and
Ballston and notes thereto,  respectively.  In the opinion of management of MSBC
and Ballston, all adjustments (which include normal recurring accruals) that are
necessary for a fair presentation for such periods or dates for their respective
information have been made.


                                       7
<PAGE>
<TABLE>


                        MAINSTREET BANKGROUP INCORPORATED
                  SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA
                  (Dollars in Thousands, Except per Share Data)
<CAPTION>
                                                                         At Or For The Year
                                                                         Ended  December 31,
                                             ----------------------------------------------------------------------
                                                 1997           1996           1995           1994           1993
                                                 ----           ----           ----           ----           ----
<S> <C>
      STATEMENT OF INCOME:
      Interest income......................  $  115,425     $   98,201     $   85,414      $  73,356      $  70,057
      Interest expense.....................      58,779         44,775         38,404         30,310         29,837
                                             ----------     ----------     ----------       --------      ---------
      Net interest income..................      56,646         53,426         47,010         43,046         40,220
      Provision for loan losses............       4,011          3,451          1,725          3,476          2,115
      Non-interest income..................      13,726         11,617          9,069          2,187          7,273
      Non-interest expense.................      40,952         37,254         34,290         33,568         32,549
                                             ----------     ----------     ----------       --------      ---------
      Income before income taxes ..........      25,409         24,338         20,064          8,189         12,829
      Income tax expense...................       8,152          7,685          5,934          1,157          3,167
                                             ----------     ----------     ----------       --------      ---------
      Net income...........................  $   17,257     $   16,653     $   14,130      $   7,032      $   9,662
                                             ==========     ==========     ==========      =========       ========
      PER SHARE DATA:
      Net income basic.....................  $     1.44     $     1.39     $     1.26      $     .65      $     .90
      Net income diluted...................        1.44           1.38           1.17            .62            .85
      Net book value.......................       10.72           9.57           8.69           7.02           7.42
      Dividends............................         .57            .49            .35            .30            .27
      STATEMENT OF CONDITION:
      Total assets ........................  $1,716,410     $1,358,127     $1,129,600      $ 990,169      $ 954,529
      Securities available for sale........     673,526        339,136        216,504        127,166        203,967
      Securities held to maturity..........      72,243         97,922        117,052        158,130         85,771
      Loans, net of unearned income........     878,777        829,979        714,453        632,971        556,855
      Allowance for loan losses............      11,786         10,903          9,605          9,547          9,329
      Deposits.............................     998,862        940,691        898,777        867,735        831,413
      Borrowed Funds.......................     574,033        294,123        118,658         37,892         33,920
      Shareholders' equity.................     128,652        114,069        103,632         76,595         80,221
      SELECTED PERFORMANCE RATIOS:
      Return on average assets ............        1.17%          1.37%          1.35%           .72%          1.06%
      Return on average shareholders' equity      13.98          15.11          15.88           8.79          12.49
      Net interest margin..................        4.13           4.72           4.89           4.88           4.81
      Dividend payout ratio................       39.58          35.25          27.78          46.15          30.00
      Average shareholders' equity to
           average total assets............        8.33           9.04           8.49           8.22           8.45
      Allowance for loan losses to total
            loans, net of unearned income..        1.34           1.31           1.34           1.51           1.68
      Allowance for loan losses to non-
           performing loans................      189.24         171.65         162.99         201.29         174.50
</TABLE>


                                       8
<PAGE>
<TABLE>


         The  following  unaudited  selected  financial  data  for MSBC has been
restated to reflect the acquisition of Regency Financial  Shares,  Inc. on March
10,  1998  which was  accounted  for using the  pooling of  interests  method of
accounting.

RESTATED SELECTED FINANCIAL DATA
(In Thousands, Except Per Share Data and Ratios)           (Unaudited)                                 (Unaudited)
                                                  Three Months Ended March 31                   Years Ended December 31
                                                  -----------------------------      -------------------------------------------
                                                      1998            1997              1997            1996           1995
                                                      ----            ----              ----            ----           ----
<S> <C>
SUMMARY OF OPERATIONS
Interest Income                                    $    36,069     $    27,863       $   121,304     $   103,623    $    90,411
Interest Expense                                        19,802          13,690            61,554          47,162         40,597
                                                   -----------     -----------       -----------     -----------    -----------
Net Interest Income                                     16,267          14,173            59,750          56,461         49,814
Provision for Loan Losses                                1,084             963             4,652           3,510          1,813
                                                   -----------     -----------       -----------     -----------    -----------
Net Interest Income After Provision for
  Loan Losses                                           15,183          13,210            55,098          52,951         48,001
Noninterest Income                                       3,776           3,964            13,879          11,782          9,196
Noninterest Expense                                     11,767          10,919            43,727          39,282         36,066
                                                   -----------     -----------       -----------     -----------    -----------
Income Before Income Taxes                               7,192           6,255            25,250          25,451         21,131
Income Tax Expense                                       2,294           1,971             8,152           8,054          6,297
                                                   -----------     -----------       -----------     -----------    -----------
NET INCOME                                         $     4,898     $     4,284       $    17,098     $    17,397    $    14,834
                                                   ===========     ===========       ===========     ===========    ===========

PER SHARE DATA (1) Net Income:
    Basic                                          $      0.38     $      0.34       $      1.36     $      1.38    $      1.26
    Diluted                                               0.38            0.34              1.35            1.38           1.17
Cash Dividends                                            0.15            0.13              0.57            0.47           0.34
Net Book Value                                           11.65            9.68             10.72            9.66           8.77

DAILY AVERAGES
Total Assets                                       $ 1,969,111     $ 1,451,550       $ 1,554,578     $ 1,283,437    $ 1,106,749
Interest-Earning Assets                              1,863,960       1,369,457         1,470,357       1,220,725      1,045,449
Securities Available for Sale                          778,197         392,411           477,650         276,562        193,431
Securities Held to Maturity                             65,542          87,672            81,204         107,569        131,308
Loans, Net of Unearned Income                          992,677         882,329           901,480         817,957        705,779
Allowance for Loan Losses                               13,538          11,744            12,124          10,881         10,171
Deposits                                             1,151,325       1,001,745         1,032,179         966,865        928,857
Interest-Bearing Liabilities                         1,626,189       1,178,382         1,265,599       1,026,909        882,876
Shareholders' Equity                                   157,240         124,793           130,505         116,901         94,729

AT PERIOD END
Total Assets                                       $ 2,014,648     $ 1,506,855       $ 1,794,242     $ 1,430,125    $ 1,192,398
Interest-Earning Assets                              1,886,546       1,415,534         1,700,604       1,341,213      1,129,519
Securities Available for Sale                          806,877         420,925           693,957         353,398        231,002
Securities Held to Maturity                             57,103          92,886            72,243          97,922        117,052
Loans, Net of Unearned Income                          998,699         886,740           925,718         878,160        756,471
Allowance for Loan Losses                               13,832          12,097            12,375          11,496         10,129
Deposits                                             1,191,437       1,035,450         1,063,732       1,000,084        951,661
Interest-Bearing Liabilities                         1,649,202       1,222,052         1,493,030       1,157,232        938,671
Shareholders' Equity                                   155,281         121,628           135,719         121,137        109,955

RATIOS
Return on Average Assets                                  1.01 %          1.20 %            1.10 %          1.36 %         1.34 %
Return on Average Shareholders's Equity                  12.63           13.92             13.10           14.88          15.66
Average Shareholders's Equity to Average
  Assets                                                  7.99            8.60              8.39            9.11           8.56
Efficiency Ratio                                         57.40           61.67             58.77           56.93          59.29
Net Interest Margin (2)                                   3.61            4.29              4.15            4.73           4.89

CREDIT QUALITY RATIOS
Allowance for Loan Losses to Nonperforming Loans        140.06 %        189.58 %          160.76 %        178.54 %       171.27 %
Allowance for Loan Losses to Nonperforming
  Assets (3)                                            117.06          166.72            132.89          153.01         129.78
Allowance for Loan Losses to Period-End
  Loans, Net of Unearned Income                           1.39            1.36              1.34            1.31           1.34
Net Charge-Offs to Average Loans, Net of
  Unearned Income                                         0.24            0.17              0.42            0.26           0.24


 s                                      9
<PAGE>


                             BALLSTON BANCORP, INC.
                  SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA
                  (Dollars in Thousands, Except per Share Data)
<CAPTION>

                                                    (Unaudited)
                                                At Or For The Three                   At Or For The Year
                                               Months Ended March 31,                 Ended December 31,
                                               ----------------------   --------------------------------------------------------
                                                                                                                     (Unaudited)
                                                    1998       1997         1997        1996        1995        1994        1993
                                                    ----       ----         ----        ----        ----        ----        ----
STATEMENT OF INCOME:
      Interest income......................   $    1,430 $    1,394   $    5,663  $    5,480  $    5,119  $    4,099  $    3,167
      Interest expense.....................          583        567        2,279       2,225       1,903       1,351         935
                                              ---------- ----------   ----------  ----------  ----------  ----------  ----------
      Net interest income..................          847        827        3,384       3,255       3,216       2,748       2,232
      Provision for loan losses............           15         15           18          12         120         297         180
      Other income.........................           95        117          598         365         341         365         368
      Other expenses.......................          704        675        2,776       2,475       2,496       2,371       2,192
                                              ---------- ----------   ----------  ----------  ----------  ----------  ----------
      Income before income taxes and
           cumulative effect of accounting
           change..........................          223        254        1,188       1,133         941         445         228
      Income taxes.........................          118         90          417         392         319         138          85
                                              ---------- ----------   ----------  ----------  ----------  ----------  ----------
      Income before cumulative effect of
           accounting change...............          105        164          771         741         622         307         143
      Cumulative effect of change in
           accounting for income taxes.....            -          -            -           -           -           -         445
                                              ---------- ----------   ----------  ----------  ----------  ----------  ----------
      Net income...........................   $      105 $      164   $      771  $      741  $      622  $      307  $      588
                                              ========== ==========   ==========  ==========  ==========  ==========  ==========
      Comprehensive income.................   $       91 $      130   $      792  $      736  $      650  $      277  $      588
                                              ========== ==========   ==========  ==========  ==========  ==========  ==========


PER SHARE DATA:
      Net income per common share (1)......   $     0.06 $     0.10   $     0.48  $     0.46  $     0.38  $     0.19  $     0.36
      Book value...........................         5.13       4.75         5.10        4.69        4.31        3.96        3.83
      Dividends............................        0.025      0.020         0.08        0.07        0.06        0.04           -
      Weighted average number of common
           shares..........................    1,619,474  1,619,474    1,619,474   1,619,474   1,624,248   1,636,974   1,636,974
STATEMENT OF CONDITION:
      Total assets.........................   $   75,675 $   71,475   $   80,336  $   78,580  $   68,104  $   61,041  $   54,274
      Investment securities available for sale     4,158      4,209        3,849       8,246       1,054       1,505           *
      Investment securities held to maturity      15,486     14,223       12,283      15,576      16,373      14,628           *
      Loans, net of unearned income........       40,504     42,229       41,293      42,750      39,616      37,168      34,440
      Allowance for loan losses............          617        628          602         613         652         529         461
      Deposits.............................       58,440     57,255       65,044      63,424      55,100      47,593      40,397
      Borrowed funds.......................        8,344      5,976        6,571       7,141       5,302       6,681       7,312
      Stockholders' equity.................        8,315      7,699        8,264       7,602       6,979       6,476       6,265
SELECTED PERFORMANCE RATIOS:
      Return on average assets.............         0.54%      0.88%        0.97%       1.06%       0.97%       0.53%       1.24%
      Return on average stockholders' equity        5.07       8.59         9.72       10.21        9.33        4.86       10.20
      Net interest margin..................         4.67       4.83         4.86        5.02        5.40        5.23        5.27
      Dividend payout ratio................        41.67      20.00        16.67       15.30       15.70       21.35           -
      Average stockholders' equity to
           average total assets............        10.63      10.20         9.98       10.56       10.52       11.24       12.73
      Allowance for loan losses to total loans      1.52       1.48         1.46        1.43        1.64        1.42        1.33
      Allowance for loan losses to non-
           performing loans................       204.30      **          147.33      315.98      187.90      423.20      113.55
</TABLE>

(1)   Effective  December  31,  1997,  Ballston  adopted  Statement of Financial
      Accounting  Standards No. 128,  "Earnings per Share." The adoption of this
      statement had no effect on Ballston.

*     As of December  31,  1993,  Ballston  did not  categorize  its  investment
      securities  as "available  for sale" or "held to  maturity."  The total of
      investment securities was approximately $11.0 million.

**    As of March 31, 1997, Ballston did not have any nonperforming loans.


                                       10
<PAGE>


                                  INTRODUCTION

         This  Proxy   Statement/Prospectus   is  being  furnished  to  Ballston
Shareholders  in  connection  with the  solicitation  of proxies by the Ballston
Board for use at the  Ballston  Annual  Meeting  to be held on  ________________
____________________  ___,  1998, at The Bank of Northern  Virginia,  1010 North
Glebe Road,  Arlington,  Virginia,  at : p.m. local time or at any  adjournments
thereof.  The  purpose of the  Annual  Meeting  is to  consider  and vote upon a
proposal  to approve  the Merger  Agreement  and the  transactions  contemplated
thereby,  as more fully set forth in the Notice of Annual  Meeting  accompanying
this Proxy Statement/Prospectus.

         The Board of Directors of Ballston  unanimously  (with one director not
present) approved the Merger Agreement and recommends that Ballston Shareholders
vote FOR its approval.

                             BALLSTON ANNUAL MEETING

Record Date; Vote Required

         The Board of Directors of Ballstons  has fixed the close of business on
, 1998, as the Record Date for  determining  shareholders  entitled to notice of
and to vote at the Annual  Meeting,  and  accordingly,  only holders of Ballston
Common  Stock of record at the close of business on that day will be entitled to
notice of and vote at the  Annual  Meeting.  The  number  of shares of  Ballston
Common Stock  outstanding on the Record Date was 1,619,474,  each of such shares
being  entitled to one vote. As of the Record Date,  the directors and executive
officers and their affiliates beneficially owned approximately 48.5% of Ballston
Common Stock.

         The  presence  in person or by proxy of the  holders  of forty  percent
(40%) of the total number of issued and  outstanding  shares of Ballston  Common
Stock is  necessary  to  constitute  a quorum at the Annual  Meeting.  As to the
approval of the Merger Agreement, by checking the appropriate box, a shareholder
may:  (i) vote "FOR"  approval  of the  Merger  Agreement;  (ii) vote  "AGAINST"
approval of the Merger  Agreement;  or (iii) "Abstain."  Because the affirmative
vote of the holders of at least a majority of the outstanding shares is required
to approve  the  Merger  Agreement  and the  transaction  contemplated  thereby,
abstentions  and a failure  to vote will have the effect of a vote  against  the
Merger  Agreement.  In  addition,  brokers  who hold  shares in street  name for
individuals  who are the beneficial  owners of such shares are  prohibited  from
giving a Proxy to vote shares held for such  individuals on the Merger Agreement
without  specific  instructions  from  such  individuals.  The  failure  of such
individuals  to provide  specific  instruction  with  respect to their shares of
Ballston Common Stock to their broker will have the effect of a vote against the
Merger Agreement.

         As to the  election  of  directors,  the Proxy  being  provided  by the
Ballston  Board enables a Ballston  shareholder  to vote for the election of the
nominees  proposed by the Ballston Board,  or to withhold  authority to vote for
one or more of the nominees being proposed. Directors are elected by a plurality
of the votes cast at the Annual Meeting  without  regard to broker  non-votes or
proxies  as to which  authority  to vote for one or more of the  nominees  being
proposed is withheld.

         As to  the  ratification  of  independent  auditors,  by  checking  the
appropriate box, a shareholder may: (i) vote "FOR" the item, (ii) vote "AGAINST"
the item, or (iii) vote to "ABSTAIN" on such item. The  affirmative  vote of the
majority  of the votes cast is  required  for the  ratification  of  independent
auditors,  without regard to broker non-votes or, proxies marked "ABSTAIN" as to
that matter.  Unless  required by law, all other  matters that may properly come
before the Annual  Meeting shall be determined by a majority of those votes cast
by shareholders  without regard to broker  non-votes or proxies marked "ABSTAIN"
as to that matter.



                                       11
<PAGE>

         The directors and executive officers of Ballston  (including certain of
their  related  interests)  beneficially  own,  as of the Record  Date,  and are
entitled  to vote at the Annual  Meeting  48.5% of the  issued  and  outstanding
shares of Ballston Common Stock.

Proxies; Revocation; Solicitation

         If the Proxy is properly  executed  and returned to Ballston in time to
be voted at the Ballston Annual Meeting,  the shares represented thereby will be
voted in accordance with the instructions marked thereon.  Ballston proxies that
are executed,  but as to which no instructions  have been marked,  will be voted
FOR the approval of the Merger Agreement.  Should any other matter properly come
before the Ballston Annual Meeting, the persons named as proxies in the Ballston
proxy,  acting by a majority of those proxies present,  will have  discretionary
authority to vote on such matters in accordance with their judgment. However, no
proxy  which is voted  "against"  the  proposal  to approve and adopt the Merger
Agreement will be voted in favor of any such adjournment or postponement.  As of
the time of the  preparation  of this Proxy  Statement/Prospectus,  the Ballston
Board does not know of any matter,  other than those matters  referred to in the
Ballston Notice of Annual Meeting of Shareholders, to be presented for action at
the Ballston Annual Meeting.

         The cost of soliciting  proxies will be borne by Ballston.  In addition
to use of the  mails,  proxies  may be  solicited  personally  or by  telephone,
telecopier  or telegraph by  officers,  directors or employees of Ballston,  who
will not be specially compensated for such solicitation activities.

         A proxy may be revoked by the person giving the proxy at any time prior
to the close of voting.  Prior to the  Annual  Meeting a proxy may be revoked by
filing with the Secretary of Ballston at Ballston Bancorp,  Inc., 1667 K Street,
N.W., Suite 700, Washington, D.C. 20006, a written revocation or a duly executed
proxy bearing a later date.  During the Annual Meeting a proxy may be revoked by
filing a written  revocation or a duly executed  proxy bearing a later date with
the Secretary of the Annual Meeting prior to the close of voting or by attending
the Annual  Meeting and voting in person.  Any  shareholder of record may attend
the Annual  Meeting  and vote in person,  whether or not a proxy has  previously
been given.

         If a person holding Ballston Common Stock in street name wishes to vote
such Ballston  Common Stock at the Annual  Meeting,  the person must obtain from
the nominee holding the Ballston Common Stock in street name a properly executed
"legal proxy" identifying the individual as a Ballston shareholder,  authorizing
the Ballston  shareholder  to act on behalf of the nominee at the Annual Meeting
and identifying the number of shares with respect to which the  authorization is
granted.

                             PROPOSAL I - THE MERGER

         The following information  concerning the Merger, insofar as it relates
to matters  contained in the Merger  Agreement,  is qualified in its entirety by
reference to the full text of the Merger Agreement which is attached as Appendix
I to this Proxy Statement/Prospectus and is incorporated by reference.





                                       12
<PAGE>

General

         On March 11, 1998, MSBC and Ballston  entered into the Merger Agreement
which provides for the Merger of Ballston with and into MSBC. Under the terms of
the Merger  Agreement,  each outstanding share of Ballston Common Stock has been
valued  at  $12.04.  The  number of shares  to be  delivered  for each  share of
Ballston  Common Stock will be determined by dividing $12.04 by the Average MSBC
Share Price as reported on the Nasdaq  National  Stock Market for each of the 20
trading days  preceding the tenth  calendar day prior to the Effective  Date. If
such  quotient is less than 0.4025,  the  Exchange  Ratio shall be 0.4025 and if
such quotient is more than 0.4920, the Exchange Ratio shall be 0.4920. Cash will
be paid in lieu of the issuance of any  fractional  shares.  The Exchange  Ratio
will be adjusted to reflect any consolidation,  split-up,  other subdivisions or
combinations of MSBC common stock, any dividend payable in MSBC common stock, or
any capital reorganization involving the reclassification of MSBC common stock.

         Ballston has agreed that prior to the  Effective  Date, it will operate
its business substantially as presently operated and in the ordinary course, and
consistent with such  operations will use reasonable  efforts to preserve intact
its present  business  operation  and keep  available  its present  officers and
employees material to its business and operations.

Background of the Merger

         In recent years, a number of banks, bank holding  companies,  and other
interested  parties  have  contacted   Ballston  and  suggested   exploring  the
possibility of a merger or acquisition.  In general, however, the Ballston Board
considered  a merger or  acquisition  to be either  premature or not in the best
interests  of  Ballston.  As a result,  the  Board  elected  not to pursue  such
preliminary  expressions  of  interest  and  instead  focused on a  strategy  of
internal growth, with inconsistent and ultimately limited results.

         The Board and management of Ballston have followed,  however, the trend
in the banking industry generally and, more specifically, in The Bank's Northern
Virginia market area,  towards  increasing levels of competition and significant
consolidation.  Ballston  recognizes  that the larger  entities that result from
such consolidations may acquire substantial  competitive  advantages,  including
greater  diversity  in their loan  portfolios,  improved  access to capital  and
funding and the ability to spread costs of new  products,  services and research
and development over a wider customer base.

         During  the first  quarter of 1997  Ballston  received  an  unsolicited
overture from Abigail Adams National Bancorp,  Inc. ("AANB"),  which resulted in
subsequent discussions between Ballston and AANB concerning shareholder welfare,
cultural  affinities,  and  other  considerations.  At the  conclusion  of these
discussions,  on June 23, 1997, Ballston signed a definitive  agreement to merge
with and into a subsidiary of AANB (the "AANB Merger").  However, at the Special
Meeting of Shareholders  of AANB held on December 31, 1997, the  shareholders of
AANB  failed  to  approve  the AANB  Merger  and,  as a result,  the  definitive
agreement between Ballston and AANB was terminated.

         During early January 1998,  following the termination of the definitive
agreement between Ballston and AANB, a financial  institution in the Washington,
D.C.  metropolitan  area  contacted an officer of Ballston  regarding a possible
affiliation  with  Ballston.  In light of this  expression  of interest  and the
likelihood of receiving other expressions of interest in a possible affiliation,
management  of Ballston  retained  Danielson to provide  financial  and business
advice regarding the strategic future of Ballston.  As discussed with Danielson,
the primary  criterion of  management  and the Board for any possible  strategic
decision,   including  affiliation  with  a  financial   institution,   was  the
maximization of the long-term value of Ballston to its shareholders.



                                       13
<PAGE>

          During the remainder of the month of January,  Danielson and Robert F.
Kelleher,  Chairman  of the  Board,  President  and Chief  Executive  Officer of
Ballston,  each were contacted by several other  financial  institutions  in the
Washington,  D.C.  metropolitan  area,  regarding  a possible  affiliation  with
Ballston.   Between  January  29  and  February  5,  1998,  Danielson  met  with
representatives  of  each  of the  financial  institutions  that  had  expressed
interest in establishing an affiliation  with Ballston,  including  several that
Danielson had identified, and Danielson requested all submissions of interest to
be received by February 17, 1998.

         On February 11, 1998,  Danielson met with the Board and  identified and
analyzed the financial institutions that had expressed an interest in a possible
affiliation with Ballston.  Between February 14 and 17, 1998, Danielson received
several  formal   submissions  of  interest  from  various   institutions   (the
"interested parties"),  including one from MSBC. On February 18, 1998, the Board
met with its legal counsel and financial  advisor to discuss the  submissions of
interest,  while management and its advisors  continued to engage in discussions
with several interested parties.  As a result of these discussions,  MSBC agreed
to revise its initial submission of interest, subject to satisfactory completion
of its remaining due  diligence,  to include  financial  terms more favorable to
Ballston.  For the reasons  discussed  below under "Reasons for the Merger," the
Board instructed  management and Danielson to pursue further  negotiations  with
MSBC. Between March 5 and 8, 1998,  representatives of MSBC conducted additional
due diligence of Ballston and, upon completion of that review, MSBC negotiated a
form of definitive merger agreement with Ballston.

         On March  11,  the Board  reviewed  the  proposal  of MSBC and met with
Danielson and Ballston's  legal counsel to discuss and review the final proposal
and terms of the Merger  Agreement.  Danielson  presented a detailed analysis of
the final  proposal to the Board and provided its oral opinion that the Exchange
Ratio was fair to Ballston's shareholders from a financial point of view.

         On the basis of a variety of factors discussed below under "Reasons for
the Merger,"  including  the opinion from  Danielson  that the MSBC proposal was
fair to  Ballston's  shareholders  from a  financial  point of view,  the  Board
concluded that  accepting  MSBC's offer was in the best interest of Ballston and
its shareholders.  Accordingly, for all of the reasons discussed above, on March
11,  1998,  Ballston's  Board  unanimously  (with one Board  member not present)
accepted MSBC 's offer and authorized execution of the Merger Agreement.

Reasons for the Merger

         In reaching its conclusion to approve the Merger  Agreement,  the Board
considered  a number of  factors.  The  Board did not  assign  any  relative  or
specific  weights to the  factors  considered.  Among  other  things,  the Board
considered:  (i) the Merger  consideration in relation to the book value, assets
and earnings of Ballston and MSBC;  (ii)  information  concerning  the financial
condition,  results of operations and prospects of Ballston and MSBC,  including
the return on assets and return on equity;  (iii) the  financial  terms of other
recent business  combinations in the banking  industry;  and (iv) the opinion of
Danielson  as  to  the  fairness  of  the  Merger  consideration  to  Ballston's
shareholders from a financial point of view.

         The Board  believes that the terms of the Merger  Agreement,  which are
the product of arms-length  negotiations  between MSBC and Ballston,  are in the
best  interest of Ballston and its  shareholders.  In the course of reaching its
determination,  the Board consulted with legal counsel with respect to its legal
duties,  the terms of the Merger Agreement and the issues related thereto;  with
its financial  advisor with respect of the financial aspects and fairness of the
transaction;  and with senior management of MSBC regarding,  among other things,
retention of Ballston employees,  customer service and depth of MSBC management.
In  reaching  its  determination  to  approve  the Merger  Agreement,  the Board
considered various factors it deemed material, including:



                                       14
<PAGE>

         (a) The  Board  analyzed  information  with  respect  to the  financial
condition, results of operations, businesses and prospects of Ballston and MSBC.
In this  regard,  the Board  analyzed  the options of having  Ballston  effect a
transaction with a third party or continue on a stand-alone  basis. The range of
values  on the  basis  of a  combination  with a  third  party  were  determined
generally to exceed the present value of Ballston shares on a stand-alone  basis
under business strategies which could be reasonably implemented by Ballston.

         (b) The Board  considered  the oral  opinion  (which  was  subsequently
confirmed in writing) of  Danielson  that,  as of March 11,  1998,  the Exchange
Ratio was fair to Ballston's  shareholders  from a financial  point of view. See
"Opinion of Ballston's Financial Advisor."

         (c) The Board considered the current operating environment,  including,
but  not  limited  to,  the  continued  consolidation  activity  and  increasing
competition in the banking and financial services  industries,  the prospect for
further  changes  in these  industries,  and the  importance  of  being  able to
capitalize on developing opportunities in these industries. This information has
been  periodically  reviewed by the Board at its regular board  meetings and was
also discussed between the Board and Ballston's various advisors.

         (d) The Board  considered  the  other  terms of the  Merger  Agreement,
including the tax-free nature of the transaction.

         (e) The Board  considered  the  detailed  financial  analyses and other
information with respect to Ballston and MSBC discussed,  as well as the Board's
own  knowledge of Ballston  and MSBC and their  respective  businesses.  In this
regard, the latest  publicly-available  financial and other information for MSBC
was analyzed,  including a comparison to publicly available  financial and other
information for other similar institutions.

         (f) The Board considered the value of Ballston Common Stock if Ballston
continued as a stand-alone  entity compared to the effect of Ballston  combining
with MSBC in light of the factors  summarized above and the current economic and
financial environment,  including,  but not limited to, other possible strategic
alternatives,  the results of the contacts  and  discussions  between  Ballston,
MSBC,  and  Danielson  and various third parties and the belief of the Board and
management  that the Merger offered the best  transaction  available to Ballston
and its shareholders.

         (g) The Board considered the likelihood of the Merger being approved by
the appropriate regulatory  authorities,  including factors such as market share
analysis,  Community  Reinvestment Act rating at that time and the estimated pro
forma financial impact of the Merger on MSBC.

         The merger  consideration  of  approximately  $12.04 per share for each
outstanding  share of Ballston  Common  Stock in the form of MSBC common  stock,
subject to adjustment under certain  conditions,  represents an exchange premium
of approximately 2.4 times Ballston's book value at December 31, 1997.

         The foregoing  discussion of the information and factors  considered by
the Board is not intended to be exhaustive, but constitutes the material factors
considered by the Board. In reaching its  determination to approve and recommend
the Merger Agreement,  the Board did not assign any relative or specific weights
to the foregoing  factors,  and individual  directors may have weighted  factors
differently.  After  deliberating  with  respect  to the  Merger  and the  other
transactions  contemplated  by the Merger  Agreement,  considering,  among other
things,  the matters  discussed  above and the opinion of Danielson  referred to
above,  the Board approved and adopted the Merger Agreement as being in the best
interests of Ballston and its shareholders.



                                       15
<PAGE>

Opinion of Ballston's Financial Advisor

         Ballston  retained  Danielson to provide  financial and business advice
regarding the strategic  future of Ballston.  Danielson is regularly  engaged in
the valuation of banks, bank holding  companies,  and thrifts in connection with
mergers,  acquisitions,  and other securities transactions and has knowledge of,
and experience with, the Mid-Atlantic banking markets and banking  organizations
operating in those  markets.  Danielson was selected by Ballston  because of its
knowledge of, expertise with, and reputation in the financial services industry.

         In such capacity,  Danielson reviewed the Merger Agreement with respect
to the pricing and other terms and conditions of the Merger, but the decision as
to accepting the offer was ultimately made by the Board.  Danielson rendered its
oral opinion to the Ballston Board, which it subsequently  confirmed in writing,
that as of the date of such opinion,  the financial terms of the MSBC offer were
"fair" to Ballston  and its  shareholders.  No  limitations  were imposed by the
Ballston  Board  upon  Danielson  with  respect  to the  investigation  made  or
procedures followed by it in arriving at its opinion.

         In arriving at its opinion, Danielson (a) reviewed certain business and
financial  information  relating to Ballston and MSBC,  including  MSBC's annual
report for the  fiscal  year  ended  December  31,  1997,  Ballston's  unaudited
financial  statements  for December 31, 1997,  and call report data from 1989 to
1996  including  quarterly  reports for 1997; (b) discussed the past and current
operations,  financial  condition  and  prospects  of  Ballston  with its senior
executives;  (c) analyzed the pro forma impact of the merger on MSBC's  earnings
per share,  capitalization,  and  financial  ratios;  (d)  reviewed the reported
prices and trading  activity  for the MSBC  common  stock and  compared  them to
similar bank holding  companies;  (e) reviewed and compared the financial terms,
to the extent publicly available, with comparable transactions; (f) reviewed the
Merger  Agreement and certain related  documents;  and (g) considered such other
factors as were deemed appropriate.

         Danielson  did not  obtain  any  independent  appraisal  of  assets  or
liabilities  of  Ballston  or MSBC or their  respective  subsidiaries.  Further,
Danielson did not independently  verify the information  provided by Ballston or
MSBC and assumed the accuracy and completeness of all such information.

         In arriving at its opinion,  Danielson performed a variety of financial
analyses. Danielson believes that its analyses must be considered as a whole and
that  consideration  of portions  of such  analyses  and the factors  considered
therein,  without  considering  all the factors and  analyses,  could  create an
incomplete view of the analyses and the process underlying  Danielson's opinion.
The preparation of a fairness opinion is a complex process involving  subjective
judgments and is not  necessarily  susceptible  to partial  analysis and summary
description.

         In its analyses,  Danielson  made certain  assumptions  with respect to
industry performance,  business and economic conditions, and other matters, many
of which were beyond  Ballston's or MSBC's control.  Any estimates  contained in
Danielson's analyses are not necessarily  indicative of future results of value,
which may be significantly more or less favorable than such estimates. Estimates
of the value of companies do not purport to be appraisals or necessarily reflect
the prices at which companies or their securities may actually be sold.



                                       16
<PAGE>

         The following is a summary of selected analyses considered by Danielson
in connection with its opinion letter.

Pro Forma  Merger  Analyses.  Danielson  analyzed  the  changes in the amount of
earnings and book value  represented  by the receipt of about $19.5  million for
all of the outstanding  shares of Ballston  Common Stock,  which will be paid in
MSBC common stock. The analysis evaluated, among other things, possible dilution
in earnings and capital per share for MSBC common stock.

         Specifically,  Danielson  determined  that  based upon  MSBC's  current
announced  transactions which include Regency Financial Shares, Inc. ("Regency")
and Ballston,  MSBC had on a historic  basis diluted its 1997 earnings per share
by approximately $0.04 per share or 2.8%.  Similarly,  Danielson determined that
based upon Regency and Ballston and a December  31, 1997  financial  date,  MSBC
will  benefit  from $0.06 per share in  accretion  to equity  per share,  or .5%
accretion.

Comparable  Companies.  Danielson  compared  Ballston's (a) tangible  capital of
10.31% of assets as of December 31, 1997, (b) 1.74% of assets  nonperforming  as
of December 31, 1997,  and (c) net operating  income of 1.77% of average  assets
for 1997, with the medians for selected  Virginia banks,  which Danielson deemed
comparable.  These  banks  included  Community  Bank of Northern  Virginia,  The
Horizon Bank of Virginia, Rockingham Heritage Bank, Virginia Commerce Bank, N.A.
and Virginia  Heartland Bank.  Their medians as of September 30, 1997 or for the
first nine months of 1997,  annualized,  were (a)  tangible  capital of 8.37% of
assets, (b) .96% of assets nonperforming,  and (c) net operating income of 1.65%
of average assets.

         Danielson  also  compared  MSBC's  (a) stock  price as of March 9, 1998
equal to 20.1 times  earnings  and 271% of book,  (b)  dividend  yield  based on
trailing  four  quarters as of December  31, 1997 and stock price as of March 9,
1998 of 2.07%,  (c) tangible capital as of December 31, 1997 of 7.46% of assets,
(d) nonperforming  assets as of December 31, 1997 equal to .46% of total assets,
(e) return on average  assets during the trailing four quarters  ended  December
31,  1997 of 1.24% and (f) return on average  equity  during the same  period of
13.98%,  with the medians for  selected  banks and bank holding  companies  that
Danielson  deemed to be comparable to MSBC. The selected  institutions  included
F&M Bancorp,  F&M National  Corporation,  FCNB Corp., First Charter Corporation,
First United Corporation,  LSB Bancshares,  Inc., Mason-Dixon Bancshares,  Inc.,
Provident Bankshares Corp., Sandy Spring Bancorp,  Inc., Triangle Bancorp,  Inc.
and Union Bankshares Corp. The comparable  medians were (a) stock price equal to
21.1 times earnings and 282% of book, (b) dividend yield of 1.90%,  (c) tangible
capital  of 9.43% of  assets,  (d) .64% of assets  nonperforming,  (e) return on
average  assets of 1.26% and (f) return on average  equity of 12.64%.  Danielson
also compared  other income,  expense,  and balance  sheet  information  of such
companies with similar information about MSBC.

Comparable Transaction Analysis. Danielson compared the consideration to be paid
in the  merger to the  latest  twelve  months  earnings  and  equity  capital of
Ballston  with  earnings  and  capital   multiples  paid  in   acquisitions   of
Mid-Atlantic banks in 1997 and 1998 through the opinion date. Of these, the most
applicable recent  transactions  included United  Bankshares'  purchase of First
Patriot Bank, F&M National  Corporation's  purchases of Peoples Bank of Virginia
and the Bank of Alexandria, Community Bancshares buying County Bank-Chesterfield
and MSBC's  purchases  of  Regency  Financial  Shares,  Inc.,  Tysons  Financial
Corporation  and  Commerce  Bank  Corporation.  At the time  Danielson  made its
analysis,  the  consideration  to be paid in the merger  was 235% of  Ballston's
December  31, 1997 book value and 23.5 times  Ballston's  earnings in 1997 after
adjustments  were made to exclude  unusual and one-time  revenues and  expenses.
This  compares  to the  median  multiples  of 256% of book  value and 18.7 times
earnings for the most applicable comparable acquisitions and 21.2 times earnings
and 275% of book for all Mid-Atlantic bank acquisitions in 1997.



                                       17
<PAGE>

Other  Analysis.  In addition  to  performing  the  analyses  summarized  above,
Danielson also  considered the general market for bank and thrift  mergers,  the
historical financial performance of Ballston and MSBC, the deposit market shares
of both companies,  and the general  economic  conditions and prospects of those
companies.

         In examining  the  historical  financial  performance  for Ballston and
MSBC, Danielson utilized publicly-available  financial data of Ballston and MSBC
from 1988 and 1989,  respectively,  through  December  31, 1997.  This  analysis
included among other things  consideration  of asset growth and change,  capital
growth and change,  revenue and expense ratio  analysis and loan and deposit mix
change.

         In examining  Ballston's  market,  Danielson  utilized  branch  deposit
information  as of June  30,  1997 and  adjusted  for  mergers  in  process,  to
determine  that Ballston held a 1.7% deposit  market share in Arlington  County.
This  analysis  also  showed  Ballston  to be one of  only  three  locally-owned
community banks operating in this market area. Danielson also utilized available
office  space data to establish  that  Arlington  County and Ballston  have 26.2
million and 4.2 million  square feet of office  space  available  as of June 30,
1996.

         Danielson  also  considered in its analysis the markets served by MSBC,
which include eleven Virginia  counties,  four of Virginia's  independent cities
and one Maryland county. MSBC does not currently have any presence in Arlington.

         No company or transaction used in the analysis is identical to Ballston
or MSBC.  Accordingly,  an  analyses  of the  results  of the  foregoing  is not
mathematical; rather it involves complex considerations and judgments concerning
differences  in financial  and  operating  characteristics  of the companies and
other  factors  that could  affect the public  trading  values of the company or
companies to which they are being compared.

         The  summary  set  forth  above  does  not  purport  to  be a  complete
description of the analyses and procedures  performed by Danielson in the course
of arriving at its opinions.  The full text of the opinion of Danielson dated as
of March 11, 1998, which sets forth assumptions made and matters considered,  is
attached  hereto as  Appendix  II of this Proxy  Statement/Prospectus.  Ballston
shareholders are urged to read this opinion in its entirety. Danielson's opinion
is directed only to the consideration to be received by Ballston shareholders in
the Merger and does not constitute a recommendation to any Ballston  shareholder
as to how any such shareholder should vote at the shareholders meeting.

         Ballston has agreed to pay  Danielson a  transaction  fee in connection
with  the  Merger,  a  substantial  portion  of  which  is  contingent  upon the
consummation of the Merger. Under the terms of the Danielson agreement, Ballston
has agreed to pay  Danielson a  transaction  fee equal to 0.5% of the  aggregate
transaction price, of which approximately 25% has been paid and the remainder is
payable upon closing of the  transaction.  Danielson  has also received a fee of
$10,000  for  rendering  its  fairness  opinion,  which  amount will be credited
against  the  balance  of  the   transaction   fee  payable  to  Danielson  upon
consummation of the Merger.  Ballston has also agreed to reimburse Danielson for
its reasonable out-of-pocket expenses incurred in connection with its engagement
and to indemnify  Danielson and its  affiliates and their  respective  partners,
directors,  officers, employees, agents, and controlling persons against certain
expenses and liabilities, including liabilities under securities laws. In regard
to the failed AANB Merger, Danielson was paid fees of approximately $13,000.

Conditions to Consummation of the Merger; Waiver

         The Merger  will  occur  only if holders of at least a majority  of the
outstanding  shares of  Ballston  Common  Stock  approve  the Merger  Agreement.
Consummation  of the  Merger is  subject to the  satisfaction  of certain  other
conditions,  including (i) receipt of the approval by the Federal  Reserve Board
and the SCC; (ii)  representations and warranties of MSBC and Ballston contained
in the Merger  Agreement  being true and correct on the  effective  date;  (iii)
receipt by MSBC of a letter from each person who is deemed to be an  "affiliate"


                                       18
<PAGE>

of Ballston,  concerning  transactions  in the stock of Ballston and MSBC before
and after the Merger; (iv) continued effectiveness of the registration statement
filed with the absence of any pending or threatened stop order  proceedings with
respect thereto;  and (v) no order,  decree or injunction of any court or agency
of competent jurisdiction that enjoins or prohibits consummation of the Merger.

         The  obligations  of MSBC and  Ballston  to  consummate  the  Merger is
subject  to  the  satisfaction  or  waiver  of  certain  additional  conditions,
including  without  limitation  the  following:  (i)  any  inaccuracies  in  the
representations  and  warranties  of the other  party  contained  in the  Merger
Agreement or in any document delivered pursuant thereto; (ii) the receipt of all
general  government  approvals (other than approval by the Federal Reserve Board
and the SCC);  (iii)  receipt  of an  auditors'  report  as to the  consolidated
financial position and results of operations of the other party; (iv) receipt of
an opinion,  dated at the Effective  Date, from the other party's legal counsel;
(v)  receipt of a tax opinion  regarding  the tax free nature of the Merger from
Flippin,  Densmore, Morse, Rutherford & Jessee, A Profssional Corporation;  (vi)
Blue Sky law approvals, permits and other authorizations necessary to consummate
the Merger;  (vii) the receipt of an opinion from Coopers & Lybrand L.L.P.  that
the Merger will qualify for pooling of interests accounting treatment; and (vii)
the receipt of a fairness opinion by Danielson,  at the time the Proxy Statement
is mailed.

         Prior to the Effective Date, any provision of the Merger  Agreement may
be (i)  waived by the party  benefited  from the  provision  or (ii)  amended or
modified  at  any  time   (including  with  respect  to  the  structure  of  the
transaction),  except  that after the  approval  of the  Merger by the  Ballston
shareholders,   the  merger   consideration  to  be  received  by  the  Ballston
shareholders may not be decreased. 

No Solicitation of Transactions

         Pursuant to the Merger Agreement, Ballston and its directors, officers,
employees,  representatives or agents may not, directly or indirectly,  take any
action to solicit,  support or  encourage  any offer or proposal  from any other
person to acquire  Ballston or its assets or shares of Ballston Common Stock, or
engage in negotiations  with or provide  information to such person with respect
to such offer or proposal.  In connection with any unsolicited bona fide written
proposal, Ballston may engage in such negotiations or provide information if the
Board of Directors of Ballston concludes, after receipt of legal advice from its
counsel, that their fiduciary duties to the shareholders of Ballston so require.
Ballston will immediately  notify MSBC if any such  negotiations  occur, if such
information  is  provided,  or if such offer or proposal is made,  and will keep
MSBC informed of any such negotiations, offers, proposals, or transactions.

Stock Option Agreement

         In connection with the Merger Agreement, MSBC and Ballston entered into
a Stock Option Agreement,  dated as of March 11, 1998 (the "Option  Agreement").
Specifically,  the Option Agreement  provides that MSBC shall have the option to
purchase up to 322,275 of the  authorized,  but  unissued,  shares of Ballston's
Common Stock at a price of $8.64 per share. The Option  Agreement  provides that
MSBC has an option to purchase Ballston Common Stock only upon the occurrence of
the following  events:  (i) Ballston enters into an agreement with a third party
to engage in a merger,  consolidation,  sale of substantially all of its assets,
or sale of securities  representing 20% or more of the voting power of Ballston;
or (ii) a third  party  acquires  beneficial  ownership  or the right to acquire
beneficial ownership of 25% or more of outstanding Ballston Common Stock. MSBC's
right to exercise the Option  Agreement has not been triggered as of the date of
this Proxy Statement/Prospectus.


                                       19
<PAGE>

MSBC's Acquisition Program

         MSBC has  expanded  its market  area and  increased  its  market  share
through both internal  growth and  strategic  acquisitions.  Since  December 31,
1997, MSBC has acquired approximately $191.6 million in assets and approximately
$145.0 million in deposits through two bank acquisitions.  On February 28, 1998,
MSBC completed the  acquisition  of Tysons  Financial  Corporation,  the holding
company of Tysons  National Bank,  with three offices in Northern  Virginia.  At
March 31, 1998, Tysons Financial  Corporation had total assets of $119.5 million
and $98.5 million in deposits.  Additionally,  on March 10, 1998, MSBC completed
the  acquisition  of Regency  Financial  Shares,  Inc.,  the holding  company of
Regency Bank,  with three offices in the Richmond,  Virginia  area. At March 31,
1998,  Regency  Bank had total  assets of $81.6  million  and $69.2  million  in
deposits.  Additional  opportunities  may  exist for MSBC to  acquire  financial
institutions or to acquire assets and deposits that will allow MSBC to enter new
markets or  increase  market  share in  existing  markets.  MSBC may also pursue
acquisition opportunities in strategic markets where its managerial, operational
and capital resources will enhance the performance of acquired institutions and,
after the date of this Proxy Statement/Prospectus,  may enter into agreements to
acquire  one or  more  financial  institutions.  In  this  regard,  acquisitions
typically  involve the payment of a premium  over book value and market  values,
and therefore some dilution of MSBC's book value and net income per common share
may occur in connection with any future transaction.

Exchange Ratio Termination

         The Merger  Agreement  contains a provision  that  permits  Ballston to
terminate  the Merger  Agreement if there is a decline in the Average MSBC Share
Price that is not coincidental with a significant decline in the stock prices of
certain  financial  institutions'  holding  companies  unless MSBC is willing to
increase the  consideration  it will pay for Ballston  Common Stock by adjusting
the Exchange  Ratio.  Generally,  Ballston  will have the right to terminate the
Merger  Agreement  if both (i) the Average  MSBC Share Price is less than $24.47
and (ii) the  decline  is at least 10%  greater  than the  decline  of the other
institutions.

         This  provision  specifically  provides that Ballston may terminate the
Merger Agreement during the ten day period commencing on the Determination  Date
(defined  below)  preceding  the  Effective  Date,  if  both  of  the  following
conditions  are satisfied  (i) the average share price is less than $24.47;  and
(ii) if the First  Percentage  (defined  below)  exceeds  the Second  Percentage
(defined below) by at least ten (10) percentage points.

         If Ballston  elects to exercise this  termination  right,  it must give
prompt  written  notice to MSBC  following  its  election.  During the seven day
period beginning when MSBC receives notice from Ballston, MSBC has the option to
avoid a termination  of the Merger  Agreement by electing to increase the merger
consideration.  The increase  would occur by adjusting  the Exchange  Ratio to a
number that would provide  shareholders  of Ballston with stock of MSBC equal in
market  value  to  $12.04  per  share  of  Ballston  Common  Stock  held by such
shareholders. If MSBC makes this election, it must give prompt written notice to
Ballston of its election and the  consideration to be received.  As a result, no
termination  will occur and the Merger Agreement will otherwise remain in effect
in accordance with its terms.

         The following terms have the meanings indicated below:

         "Determination  Date"  means  the  tenth  calendar  day  prior  to  the
Effective Date.



                                       20
<PAGE>

         "First Percentage" means the percentage  resulting from: (a) taking the
remainder  ("First  Remainder")  obtained by subtracting  the Average MSBC Share
Price from  $27.19;  and (b)  dividing  the First  Remainder by the Average MSBC
Share Price.

         "Second Percentage" means the percentage resulting from: (a) taking the
remainder  ("Second  Remainder")  obtained by subtracting the SNL Southeast Bank
Index  reported  most  recently  prior to the last trading day in the  measuring
period for  calculating  the Average MSBC Share Price  ("Recent SNL Bank Index")
from the SNL Southeast Bank Index reported most recently prior to or on February
13, 1998; and (b) dividing the Second Remainder by the Recent SNL Bank Index.

Termination

         In addition to terminating the Merger Agreement based upon a decline in
MSBC's  common  stock  price  described  above,  the  Merger  Agreement  may  be
terminated at any time prior to the effective date,  whether before or after its
approval by the  shareholders  of  Ballston:  (i) by mutual  consent of MSBC and
Ballston;  (ii) by either MSBC or Ballston if any  representation or warranty is
breached by the other party or if there has been a material  breach by the other
party  of any of the  covenants  or  agreements,  as  set  forth  in the  Merger
Agreement,  that has not been cured within 30 days of giving  written  notice of
the breach;  (iii) by either MSBC or  Ballston,  in the event that the Merger is
not consummated by September 30, 1998;  (iv) by either MSBC or Ballston,  in the
event the Merger is not approved by the shareholders of Ballston;  (v) by either
MSBC or Ballston, in the event the Merger is not approved by the Federal Reserve
Board or the SCC;  and (vi) by Ballston,  if its Board of  Directors  concludes,
after  receipt  of written  legal  advice  from its  counsel,  that the  Board's
fiduciary  duties to the  Ballston  shareholders  require the Board to recommend
another  acquisition  proposal to its shareholders  after  determining that such
proposal  is  superior  in  value  to  the   shareholders   to  the  transaction
contemplated by the Merger Agreement, and Ballston gives at least three business
days prior notice to MSBC of termination.

         In the event of a  termination  of the  Merger  Agreement,  the  Merger
Agreement  shall  thereafter   become  void  and  subject  to  certain  specific
provisions of the Merger Agreement dealing with  confidentiality  of information
and  expenses,  and no party shall be relieved  or released  from any  liability
arising out of a breach of any provisions of the Merger Agreement,  except as to
the payment of certain expenses by the non-breaching party.

Federal Income Tax Consequences

         MSBC and  Ballston  have  received an opinion from  Flippin,  Densmore,
Morse, Rutherford & Jessee, A Professional Corporation,  counsel for MSBC, dated
the date of this Proxy  Statement/Prospectus,  to the effect  that,  for federal
income tax purposes:

         1. The Merger will constitute a "reorganization"  within the meaning of
Section 368(a) of the Code. Ballston and MSBC will each qualify as a "party to a
reorganization" within the meaning of Section 368(b) of the Code.

         2. No gain or loss will be  recognized  by MSBC or Ballston as a result
of the Merger.

         3. No gain or loss will be  recognized  by Ballston  shareholders  as a
result of the  exchange of Ballston  Common  Stock  solely for MSBC common stock
(including any fractional  share interest)  pursuant to the Merger,  except that
gain or loss will be recognized on the receipt of cash, if any, received in lieu
of a fractional share of MSBC common stock.



                                       21
<PAGE>

         4. Cash  received  by a Ballston  shareholder  in lieu of a  fractional
share of MSBC  common  stock  will be treated as having  been  received  as full
payment in exchange for such fractional  share pursuant to Section 302(a) of the
Code.  Such  shareholder  will  recognize  gain or loss equal to the  difference
between  the  amount  of cash  received  and  the  shareholder's  basis  in that
fractional  share,  and such  gain or loss will be  capital  gain or loss if the
fractional  share  would  have  been  a  capital  asset  in  the  hands  of  the
shareholder.

         5. A dissenting  shareholder  who receives  solely cash in exchange for
his  Ballston  Common  Stock will be  treated as  receiving  a  distribution  in
redemption  of  his  Ballston  Common  Stock,  subject  to  the  provisions  and
limitations of Section 302 of the Code.

         6.  The  aggregate  tax  basis  of MSBC  common  stock  (including  any
fractional share interest)  received in the Merger by Ballston  shareholders who
exchange their Ballston Common Stock solely for shares of MSBC common stock will
be the same as the aggregate tax basis of Ballston  Common Stock  surrendered in
exchange therefor.

         7. The  holding  period  of MSBC  common  stock  received  by  Ballston
shareholders  will  include  the  period  during  which  Ballston  Common  Stock
surrendered  in  exchange  therefor  was  held  by such  Ballston  shareholders,
provided  the Ballston  Common Stock was held as a capital  asset on the date of
the exchange.

         The   opinion   is  based  on   certain   customary   assumptions   and
representations  made by duly  authorized  officers  of MSBC and  Ballston.  The
opinion is not binding on the Internal Revenue Service, any tax authority or any
court.  No assurance can be given that a position  contrary to that expressed in
the  opinion  will not be asserted by the  Internal  Revenue  Service or any tax
authority or that such contrary position will not prevail.  The opinion does not
address  all  aspects  of  federal  income  taxation  that  may be  relevant  to
particular  holders  of  Ballston  Common  Stock  and  the  opinion  may  not be
applicable  to  holders  of  Ballston  Common  Stock  that are not  citizens  or
residents of the United States or to holders of options or warrants. The opinion
does not address the effect of any applicable foreign, state, local or other tax
laws.  Receipt of substantially the same opinion as of the Merger Effective Date
is a condition to consummation of the Merger.

         The tax  consequences  to any particular  shareholder may depend on the
shareholder's  circumstances.  Ballston  shareholders are urged to consult their
own tax advisors with regard to foreign, state and local tax consequences.

Exchange of Certificates; Payment for Fractional Shares

         After the  Effective  Date,  each holder of a  certificate  theretofore
representing outstanding shares of Ballston Common Stock, upon surrender of such
certificate to Registrar and Transfer Company,  Post Office Box 1010,  Cranford,
New  Jersey  (which  shall  act  as  exchange  agent)  (the  "Exchange  Agent"),
accompanied by a letter of transmittal  shall be entitled to receive in exchange
therefor a certificate or certificates representing the number of full shares of
MSBC  common  stock  for which  shares  of  Ballston  Common  Stock  theretofore
represented by the certificate or  certificates  so surrendered  shall have been
exchanged  as  provided  plus cash in lieu of any  fractional  shares.  Until so
surrendered,  each outstanding  certificate  which, prior to the Effective Date,
represented  Ballston Common Stock will be deemed for all corporate  purposes of
MSBC to evidence  ownership  of the number of full  shares of MSBC common  stock
into  which  the  shares of  Ballston  Common  Stock  represented  thereby  were
converted, together with a right to cash in lieu of any fractional shares. Until
such outstanding  certificates  formerly  representing Ballston Common Stock are
surrendered,  no dividend  payable to holders of record of MSBC common stock for
any period as of the date  subsequent to the Effective Date shall be paid to the
holder of such outstanding  certificates in respect thereof. After the Effective


                                       22
<PAGE>

Date there  shall be no further  registry of transfer on the records of Ballston
of shares of Ballston Common Stock. If a certificate representing such shares is
presented  to the  Exchange  Agent,  it shall be canceled  and  exchanged  for a
certificate  representing  the shares of MSBC common  stock as herein  provided.
MSBC will also issue a  certificate  in exchange  for shares  evidenced  by lost
certificate(s)  provided  the  record  owner  thereof  provides  MSBC  with such
substantiation, indemnification and security as MSBC should reasonably require.

         Upon surrender of certificates of Ballston Common Stock in exchange for
MSBC common stock,  there shall be paid to the record holder of the certificates
of MSBC common  stock  issued in exchange  therefor  (i) the amount of dividends
theretofore paid with respect to such full shares of MSBC common stock as of any
date  subsequent to the Effective  Date which have not yet been paid to a public
official pursuant to abandoned property laws and (ii) at the appropriate payment
date the amount of dividends  with a record date after the Effective  Date,  but
prior to surrender,  and payment date subsequent to surrender. No interest shall
be  payable  with  respect  to such  dividends  upon  surrender  of  outstanding
certificates.

         As  soon  as  practicable  after  the  Effective  Date,  cash  (without
interest) will be paid to Ballston  shareholders  in lieu of the issuance of any
fractional  shares in an amount  equal to the fraction of a share of MSBC common
stock to which such  shareholders  would be entitled  multiplied  by the Average
MSBC Share Price.

Accounting Treatment

         The Merger  will be  accounted  for as a "pooling of  interests"  under
generally accepted accounting principles.

Regulatory Approvals

         The Merger is subject to the prior  approval of the Board of  Governors
of the Federal  Reserve  System (the "Federal  Reserve")  under the Bank Holding
Company Act of 1956, as amended (the "BHC Act") and the SCC.  Applications  have
been  filed by MSBC  with the  Federal  Reserve  and the  SCC.  There  can be no
assurance  that the approval of the Federal  Reserve or the SCC will be obtained
or as to the timing or conditions of such approvals.

Interests of Certain Persons in the Merger

         As set forth below, certain members of Ballston's  management and Board
of  Directors  have  interests  in the Merger in addition to their  interests as
shareholders.

         Indemnification;  Liability Insurance.  MSBC agrees that for the period
of the  relevant  statute  of  limitations  but in no event  less than six years
following the Effective Date, it shall cause Ballston and any successor  thereto
to indemnify and hold harmless any person who has rights to indemnification from
Ballston  to the  same  extent  and on the same  conditions  as such  person  is
entitled to  indemnification  pursuant to Ballston's  Bylaws as in effect on the
date of the Merger  Agreement,  to the extent  legally  permitted to do so, with
respect to matters  occurring on or prior to the Effective  Date  (regardless of
whether a claim is asserted in connection therewith on or prior to the Effective
Date or  thereafter).  MSBC  shall use its  reasonable  best  efforts to provide
coverage to the  officers  and  directors  of Ballston  under  MSBC's  policy or
policies  of  directors'  and  officers'  liability  insurance  on the  same  or
substantially  similar  terms then in effect for the  directors  and officers of
MSBC.

         Employee  Benefits.  Upon  consummation  of  the  Merger,  as  soon  as
administratively  practicable,  employees  of  Ballston  shall  be  entitled  to
participate in MSBC's pension, severance,  benefit and similar plans on the same
terms and  conditions  as employees of MSBC and its  subsidiaries.  Employees of
Ballston  shall be given full credit for past service with Ballston for purposes
of eligibility and vesting in the MSBC 401(k) plan.


                                       23
<PAGE>


Resales by Affiliates

         The shares of MSBC common stock issued to Ballston's  shareholders upon
consummation  of the Merger have been  registered  under the Securities Act, but
such   registration   does  not  cover   resales  by   affiliates   of  Ballston
("Affiliates").  MSBC common  stock  received  and  beneficially  owned by those
shareholders who are deemed to be Affiliates may be resold without  registration
as provided for by Rule 145 under the Securities Act, or as otherwise permitted.
The term  "Affiliate"  is  defined  to  include  any  person  who,  directly  or
indirectly,  controls,  or is  controlled  by, or is under  common  control with
Ballston at the time the Merger Agreement is submitted for approval by a vote of
holders  of  Ballston's  Common  Stock.  Generally,   this  definition  includes
executive  officers,  directors and 10%  shareholders  of Ballston and The Bank.
Each  Affiliate  who desires to resell MSBC common stock  received in the Merger
must  sell  such  MSBC  common   stock  either  (i)  pursuant  to  an  effective
registration  statement  under the Securities  Act; (ii) in accordance  with the
applicable  provisions  of Rule 145  under  the  Securities  Act;  or (iii) in a
transaction which, in the opinion of counsel for such affiliates or as described
in a "no-action"  or  interpretive  letter from the staff of the  Securities and
Exchange Commission,  in each case reasonably satisfactory in form and substance
to MSBC,  to the  effect  that  such  resale  is  exempt  from the  registration
requirements of the Securities Act.

         Rule 145(d) requires that persons deemed to be affiliates  resell their
MSBC common stock pursuant to certain of the  requirements of Rule 144 under the
Securities Act if such MSBC common stock is sold within the first year after the
receipt thereof.  After one year, if such person is not an affiliate of MSBC and
MSBC is current in the filing of its periodic  securities law reports,  a former
affiliate  of Ballston may freely  resell the MSBC common stock  received in the
Merger without limitation.  After two years from the issuance of the MSBC common
stock,  if such person is not an affiliate of MSBC at the time of sale or for at
least three months prior to such sale,  such person may freely  resell such MSBC
common stock,  without  limitation,  regardless of the status of MSBC's periodic
securities law reports.

         Commission guidelines regarding qualifying for the pooling-of-interests
method of  accounting  also limit  sales of stock of the  acquiring  company and
acquired  company by  affiliates  of either  company in a business  combination.
Commission  guidelines  also  indicate that the  pooling-of-interests  method of
accounting  will generally not be challenged on the basis of sales by affiliates
of the acquired or acquiring company if they do not dispose of any shares of the
corporation  whose shares they own or shares of a corporation  whose shares they
receive in connection  with a merger during the period  beginning 30 days before
the  Merger and  ending  when  financial  results  covering  at least 30 days of
post-merger operations of the combined operations have been published.

         Each  Affiliate has  delivered to MSBC a letter  pursuant to which such
person agreed,  among other things, not to offer to sell,  transfer or otherwise
dispose  of any of the shares of MSBC  common  stock  distributed  to him or her
pursuant to the Merger  except (i) with respect to  Affiliates  of Ballston,  in
compliance with Rule 145 under the Securities Act, or in a transaction  that, in
the opinion of counsel reasonably satisfactory to MSBC, is otherwise exempt from
the  registration  requirements  of the Securities Act, and (ii) with respect to
Affiliates  of  each  of  Ballston  and  MSBC,  in  compliance  with  Commission
guidelines regarding qualifying for  pooling-of-interests  accounting treatment.
MSBC may place  restrictive  legends on  certificates  representing  MSBC common
stock  issued to all persons who are deemed to be  "Affiliates"  under Rule 145.
The  certificates  of MSBC common stock issued to  Affiliates  in the Merger may
contain an appropriate  restrictive legend, and appropriate stop transfer orders
may be given to the transfer agent for such certificates.


                                       24
<PAGE>


Rights of Dissenting Shareholders

         Under  Section 262 of the DGCL, a copy of which is included as Appendix
III to this Proxy  Statement/Prospectus,  each holder of Ballston  Common  Stock
will be  entitled  to dissent  and demand an  appraisal  of the "fair  value" of
Ballston  Common  Stock  held  thereby  if,  prior to the  vote at the  Ballston
Meeting,  such Ballston  Shareholder  files with  Ballston a written  demand for
appraisal  and does not vote in favor of the  Merger.  Within ten days after the
Effective Date, MSBC shall notify each Ballston shareholder exercising appraisal
rights in  compliance  with  Section  262 of the date that the Merger has become
effective.  At any time within 60 days after the Effective Date, any shareholder
shall have the right to withdraw  demand for  appraisal  and to accept the terms
offered  upon the  Merger.  A written  demand  for  appraisal  should be sent to
Ballston Bancorp, Inc., 1667 K Street, N.W., Suite 700, Washington,  D.C. 20006,
Attn: Brian D. Alprin,  Secretary.  Any Ballston shareholder who fails to comply
with the requirements described above will be bound by the terms of the Merger.

         Within  120  days  after  the  Effective  Date,  MSBC  or any  Ballston
shareholder who has perfected appraisal rights in accordance with Section 262 of
the DGCL may file a petition  with the Delaware  Court of Chancery (the "Court")
demanding a determination of the value of the stock of all such shareholders. If
no petition is filed within such time,  the dissenting  shareholders'  appraisal
rights  shall  terminate.  At the  hearing  on such  petition,  the Court  shall
determine the Ballston  shareholders  who have complied with Section 262 and who
have  become  entitled  to  appraisal  rights.  The Court may  require  that the
shareholders  submit  their  certificates  of stock,  if any, to the Register in
Chancery for notation thereon of the pendency of the appraisal proceedings,  and
if any shareholder  fails to comply with such  direction,  the Court may dismiss
the proceedings as to such shareholder.  MSBC has informed Ballston that it does
not intend to file such a petition with the Court in the event that any Ballston
shareholder has perfected appraisal rights.

         After determining the shareholders entitled to an appraisal,  the Court
shall  appraise  the shares as to their fair value.  In  determining  their fair
value, the Court shall take into account all relevant  factors  exclusive of any
element of value arising from the  accomplishment  or expectation of the Merger.
The Court shall  direct the  payment of the fair value of the  shares,  together
with interest, if any, by MSBC to the shareholders entitled to such payment. The
costs of the  proceedings  may be determined  by the Court and assessed  against
either MSBC or the shareholders,  or both. The value determined by the Court may
be the same as,  more than,  or less than the merger  consideration  Ratio to be
paid pursuant to the Merger Agreement.

         The  Delaware  Supreme  Court has  stated  that  "proof of value by any
techniques or methods which are generally considered acceptable in the financial
community  and  otherwise  admissible  in  court"  should be  considered  in the
appraisal  proceedings.  In  addition,  Delaware  courts have  decided  that the
statutory appraisal remedy,  depending on factual circumstances,  may or may not
be a dissenter's  exclusive remedy.  The Court will also determine the amount of
interest,  if any, to be paid upon the  amounts to be received by persons  whose
shares of Ballston Common Stock have been appraised. The costs of the action may
be  determined  by the Court  and  taxed  upon the  parties  as the Court  deems
equitable in the  circumstances.  The Court may also order that all or a portion
of the  expenses  incurred by any holder of shares of Ballston  Common  Stock in
connection  with  an  appraisal,   including,  without  limitation,   reasonable
attorneys'  fees and the fees and expenses of experts  utilized in the appraisal
proceeding,  be  charged  pro rata  against  the  value of all of the  shares of
Ballston Common Stock entitled to appraisal.

         From and after the  Effective  Date,  no Ballston  shareholder  who has
demanded  appraisal  rights is entitled to vote such stock for any purpose or to
receive payment of any dividends or other distributions on the stock,  provided,
however,  that if no petition for an appraisal is filed within the allotted time
or if such shareholder  withdraws his demand for appraisal within 60 days of the
Effective Date or, thereafter, with written approval of Ballston, then the right
of appraisal shall cease.



                                       25
<PAGE>

         The  foregoing  summary  of  the  rights  of  shareholders   requesting
appraisal  contains material  information  relating to the exercise of appraisal
rights but does not purport to be a complete  statement of the  procedures to be
followed by Ballston  shareholders  desiring to exercise their rights requesting
appraisal.  The preservation and exercise of appraisal rights are conditioned on
strict  adherence to the applicable  provisions of Section 262 of the DGCL. Each
Ballston  shareholder  desiring to exercise  appraisal  rights  should  refer to
Section 262 of the DGCL for a complete statement of the shareholder's rights and
the steps  which must be  followed  in  connection  with the  exercise  of those
rights.
         For further  information  relating to the exercise of appraisal rights,
see Appendix III to this Proxy Statement/Prospectus.

Description of MSBC Capital Stock

         MSBC is  presently  authorized  to issue  20,000,000  shares  of common
stock, par value $5.00 per share, and 1,000,000 shares of preferred stock. As of
March 31,  1998,  there were  13,330,991  shares of MSBC common stock issued and
outstanding and no shares of preferred stock were outstanding. MSBC common stock
is traded in the  over-the-counter  market  and  quoted on the  Nasdaq  National
Market  under the symbol  "MSBC." At March 31,  1998,  there were  approximately
3,665 holders of record.

         The following summary description of capital stock of MSBC is qualified
in its  entirety by  reference to MSBC's  Articles of  Incorporation,  a copy of
which has been  incorporated  by  reference  as an exhibit  to the  Registration
Statement.

         Common Stock

         Holders of MSBC common stock are entitled to one vote per share on each
matter to be voted upon by the shareholders.  Directors are elected by a vote of
the holders of MSBC common  stock.  Dividends may be paid to the holders of MSBC
common  stock when,  as and if declared by the board of  directors  out of funds
legally available for such purposes.  The principal source of funds for dividend
payments is dividends  received from the MainStreet Banks and the Trust Company.
Payment  of  dividends  to MSBC by the Banks and Trust  Company,  without  prior
regulatory  approval,  is also subject to various  state and federal  regulatory
limitations.  In addition, MSBC's ability to pay dividends may be limited by its
obligations  under a trust preferred  offering (the "Trust Preferred  Offering")
described  below.  Holders  of  common  stock  have no  conversion,  redemption,
cumulative voting or preemptive  rights.  All outstanding  shares of MSBC common
stock are,  and the shares of MSBC common  stock to be issued in the Merger will
be, when issued, duly and validly issued, fully paid and nonassessable.

         Preferred Stock

         The board of directors, without further action by the shareholders,  is
authorized to designate and issue in series preferred stock and to fix as to any
series the dividend rate,  redemption  prices,  preferences on dissolution,  the
terms of any sinking  fund,  conversion  rights,  voting  rights,  and any other
preferences or special rights and qualifications. The board of directors without
shareholder approval can issue preferred stock with voting and conversion rights
which would  adversely  affect the voting power of the common  stockholders,  or
discourage or make more difficult an attempt to acquire control of MSBC.  MSBC's
board of  directors  has  designated  a series of  1,000,000  shares of series A
preferred  stock,  no shares of which have been  issued.  The series A preferred
stock was created in connection with the shareholder rights agreement  described
below.



                                       26
<PAGE>

         MSBC Preferred Share Rights Plan

         Pursuant to a rights agreement (the "MSBC Preferred Share Rights Plan")
dated as of January 18,  1990,  MSBC  distributed  as a dividend  one right (the
"MSBC Right" or "MSBC Rights") for each outstanding  share of MSBC common stock.
The  number of MSBC  Rights  associated  with each  share of MSBC  common  stock
outstanding  as  of  June  30,  1993  was  adjusted   proportionately   for  the
five-for-four  stock split  effective  July 30, 1993 and the  two-for-one  stock
split  effective  March 15,  1996.  Each MSBC Right  entitles  the holder to buy
fractional  shares of Participating  Cumulative  Preferred Stock,  Series A, par
value $5.00 per share, at an exercise price of $24,  subject to adjustment.  The
MSBC  Rights  will  become  exercisable  only if a person or group  acquires  or
announces a tender offer for 15% or more of the  outstanding  MSBC common stock.
When  exercisable,  MSBC may issue a share of MSBC common  stock in exchange for
each MSBC Right  other than those held by such  person or group.  If a person or
group acquires 30% or more of the outstanding MSBC common stock, each MSBC Right
will entitle the holder,  other than the acquiring  person,  upon payment of the
exercise  price,  to acquire  Preferred  Stock or, at the  option of MSBC,  MSBC
common  stock,  having a market  value equal to twice the MSBC  Rights  exercise
price.  If MSBC is acquired in a merger or other business  combination or if 50%
of its earnings  power is sold,  each MSBC Right will entitle the holder,  other
than the acquiring  person,  to purchase  securities  of the  surviving  company
having a market value equal to twice the MSBC Rights  exercise  price.  The MSBC
Rights will expire on January 18, 2000,  and may be redeemed by MSBC at any time
prior to the  tenth  day  after an  announcement  that a 10%  position  has been
acquired, unless such time period has been extended by the board of directors.

         Until such time as a person or group  acquires  or  announces  a tender
offer for 15% or more of the MSBC  common  stock,  (i) the MSBC  Rights  will be
evidenced by the MSBC common stock certificates and will be transferred with and
only  with such MSBC  common  stock  certificates,  and (ii) the  surrender  for
transfer of any  certificate  for MSBC  common  stock will also  constitute  the
transfer of the MSBC Rights associated with the MSBC common stock represented by
such certificate. MSBC Rights may not be transferred, directly or indirectly (i)
to any person or group that has  acquired,  or  obtained  the right to  acquire,
beneficial  ownership of 10% or more of the MSBC Rights (an "Acquiring Person"),
(ii) to any person in connection with a transaction in which such person becomes
an Acquiring  Person or (iii) to any  affiliate or associate of any such person.
Any MSBC Right that is the  subject of a  purported  transfer to any such person
will be null and void.

         The MSBC Rights can be expected to have certain  anti-takeover  effects
if an acquisition transaction not approved by the board of directors is proposed
by a person or group.  In such event,  the MSBC  Rights  will cause  substantial
dilution to any person or group that acquires  more than 15% of the  outstanding
shares of MSBC common stock if certain events  thereafter occur without the MSBC
Rights having been redeemed.  Because of these  provisions,  it is unlikely that
any  person  or group  will  proposed  an  acquisition  transaction  that is not
approved by the board of directors.  Thus, the MSBC Rights could have the effect
of discouraging acquisition transactions not approved by the board of directors.
The MSBC Rights do not interfere with any merger or other  business  combination
approved by the board of directors and shareholders  because the MSBC Rights are
redeemable  with the  concurrence of a majority of the  "Continuing  Directors,"
defined as  directors  in office when the MSBC  Preferred  Share Rights Plan was
adopted or any person  added  thereafter  to the Board with the  approval of the
Continuing Directors.

         The foregoing  description of the MSBC Preferred Share Rights Plan does
not purport to be complete  and is qualified in its entirety by reference to the
terms of the MSBC Preferred Share Rights Plan,  which is more fully described on
Form 8-K filed January 19, 1990, which is incorporated herein by reference.



                                       27
<PAGE>

Trust Preferred Offering

         In November,  1997,  MSBC created a special  purpose  subsidiary,  MSBC
Capital  Trust  I,  to  issue  approximately  $50  million  of  trust  preferred
securities. The issuance of these securities was completed on November 19, 1997,
and the  proceeds  were used to  purchase  approximately  $50  million of junior
subordinated  debentures  issued by MSBC. The proceeds received by MSBC from the
sale of the junior  subordinated  debentures are expected to be used to increase
its capital to support  recent and pending  acquisitions  and for other  general
corporate  purposes.  MSBC has guaranteed the trust preferred  securities and is
obligated under the junior subordinated debentures. Accordingly, no dividend may
be paid to holders of MSBC common stock until  interest  payments are made under
the junior subordinated debentures.

Comparative Rights of Shareholders

         There are  significant  differences  between  the  corporation  laws of
Virginia and Delaware and the organizational  documents of MSBC and Ballston. As
a Virginia corporation,  MSBC is subject to the provisions of the Virginia Stock
Corporation  Act  (the  "VSCA").  Ballston  is a  Delaware  corporation  and  is
therefore  subject  to the DGCL.  Shareholders  of  Ballston,  whose  rights are
governed by Ballston's certificate of incorporation  ("Ballston's  Certificate")
and  Ballston's  bylaws  ("Ballston   Bylaws")  and  by  the  DGCL  will  become
shareholders of MSBC upon consummation of the Merger. Accordingly, the rights of
the Ballston  shareholders  as shareholders of MSBC will then be governed by the
MSBC articles of incorporation  ("MSBC Articles"),  MSBC bylaws ("MSBC Bylaws"),
and the VSCA.

         The VSCA and the DGCL differ in several  respects.  It is not practical
to summarize all of such  differences  in this Proxy  Statement/Prospectus,  but
some of the principal  differences which could affect the rights of shareholders
materially  are  discussed  below.  This summary is qualified in its entirety by
reference to the articles or  certificate  of  incorporation  and bylaws of each
corporation and the VSCA and the DGCL.

Authorized  Capital.  MSBC Articles  authorizes  the issuance of (i)  20,000,000
shares of common stock, of which 13,330,991 shares, $5.00 par value, were issued
and  outstanding  as of March 31, 1998 and (ii)  1,000,000  shares of  preferred
stock,  without par value,  of which no shares were issued and outstanding as of
March 31, 1998.  MSBC 's Articles  authorize  the MSBC board of  directors  (the
"MSBC Board"), without shareholder approval, to fix the preferences, limitations
and  relative  rights of the  preferred  stock and to  establish  series of such
preferred stock and determine the variations  between each series. If any shares
of preferred stock are issued,  the rights of holders of MSBC common stock would
be subject to the rights and preferences  conferred to holders of such preferred
stock.  In addition,  the preferred  stock could be used in a manner which would
discourage or make more difficult an attempt to acquire control of MSBC. See "--
MSBC Rights Agreement."

         Ballston's  Certificate authorizes the issuance of (i) 3,000,000 shares
of common stock,  of which  1,619,474  shares,  $.20 par value,  were issued and
outstanding as of March 31, 1998 and 500,000 shares of serial  preferred  stock,
$.20 par value,  of which no shares were issued and  outstanding as of March 31,
1998. Ballston's  Certificate authorizes the Ballston Board, without shareholder
approval,  to fix  the  preferences,  limitations  and  relative  rights  of the
preferred  stock and to establish  series of such preferred  stock and determine
the variations between each series.  Similar to the MSBC Articles, if any shares
of preferred  stock are issued,  the rights of holders of Ballston  Common Stock
would be  subject to the rights  and  preferences  conferred  to holders of such
preferred stock.


                                       28
<PAGE>


         The holders of both MSBC common  stock and  Ballston  Common Stock have
one vote for each share held on any matter  presented for  consideration  by the
shareholders. Neither the holders of MSBC common stock nor Ballston Common Stock
are entitled to cumulative voting in the election of directors.

Preemptive  Rights.  The common stock  shareholders  of MSBC and Ballston do not
have  preemptive  rights,  and each of the MSBC Board and the Ballston Board has
the authority to issue additional shares without first obtaining the approval of
existing  shareholders  and  without  first  offering  such  shares to  existing
shareholders for purchase. Following the proposed merger, MSBC common stock will
continue  to be  available  for  issuance by the MSBC Board when and as the MSBC
Board  determines,  for the  purpose  of raising  capital,  in  acquiring  other
businesses, and for other appropriate purposes.

Directors;  Vacancies  and Removal of Directors.  Under the VSCA,  the number of
directors  of a  corporation  may be fixed in the articles of  incorporation  or
bylaws of a  corporation.  The MSBC  Bylaws  provide  that the MSBC Board  shall
consist of 12 persons.  All of the MSBC  directors  are elected  each year.  Any
vacancy  occurring  on the MSBC  Board,  including a vacancy  resulting  from an
increase in the number of directors,  may be filled by the affirmative vote of a
majority  of the  remaining  directors,  though  less  than a quorum of the MSBC
Board.  However,  the VSCA  provides  that,  when the  bylaws  fix the number of
directors,  the Board may only  increase or decrease  that number by 30% or less
without  shareholder  action.  Directors  so chosen shall hold office for a term
expiring at the next following annual meeting of shareholders at which directors
are elected. No decrease in the number of directors  constituting the MSBC Board
shall shorten the term of any incumbent  director.  Subject to the rights of the
holders of any preferred stock then outstanding,  any director may be removed by
the affirmative vote of the holders of at least two-thirds of outstanding voting
shares.

         Under the DGCL,  the number of  directors  of a  corporation,  absent a
provision in the certificate to the contrary,  may be fixed by, or in the manner
provided by, the bylaws.  The Ballston  Bylaws  provide that the Ballston  Board
shall consist of not less than one nor more than 25 persons.  The Ballston Board
currently  consists of 7 persons,  which all are elected each year.  Any vacancy
occurring on the Ballston Board, other than a vacancy resulting from an increase
of more than five persons,  may be filled by the affirmative  vote of a majority
of the remaining directors,  though less than a quorum of the Ballston Board. In
addition,  any vacancy,  including one created from an increase in the number of
directors,  may be filled at a meeting  called for such purpose,  by vote of the
shareholders.  Directors so chosen shall hold office for a term  expiring at the
next following  annual meeting of  shareholders  at which directors are elected.
Subject to the rights of the holders of any  preferred  stock  outstanding,  any
director  may be removed by the  affirmative  vote of the  holders of at least a
majority of outstanding voting shares.

Power to Call Special Shareholders' Meetings.  Under the VSCA, a special meeting
of  shareholders  may be called by the board of directors or by any other person
authorized to do so in the certificate of incorporation or the bylaws.  The MSBC
Bylaws  provide  that a special  meeting  of  shareholders  may be called by the
Chairman, the Vice-Chairman, the President or a majority of the directors.

          Under the DGCL, a special meeting of shareholders may be called by the
board of directors or by any other person authorized to do so in the certificate
of  incorporation  or the bylaws.  The  Ballston  Bylaws  provide  that  special
meetings of shareholders may be called by the Ballston Board, by the Chairman of
the Ballston Board, or, if there is none, by the President. Shareholders are not
permitted to call a special  meeting or to require that the Board call a special
meeting of shareholders.



                                       29
<PAGE>

Director Nomination. MSBC's Bylaws provide that any nomination for director made
by a shareholder  must be made in writing to the Secretary of MSBC not less than
90 days  prior to the  meeting  of  shareholders  at which  directors  are to be
elected. Any such shareholder's notice shall include (i) the name and address of
the shareholder and of each person to be nominated,  (ii) a representation  that
the  shareholder is a holder of record of stock of MSBC entitled to vote at such
meeting  and  intends to appear in person or by proxy at the meeting to nominate
each person specified, (iii) a description of all arrangements or understandings
between the  shareholder  and each  nominee and any other  person  (naming  such
person) pursuant to which the nomination is made by the  shareholder,  (iv) such
other information  regarding each nominee as would be required to be included in
a proxy  statement  filed pursuant to the proxy rules of the SEC had the nominee
been  nominated by the Board,  and (v) the consent of each nominee to serve as a
director of MSBC if so elected.  There is no requirement in the MSBC Articles or
MSBC Bylaws that directors of MSBC own any capital stock of MSBC. There are also
no residency or meeting attendance requirements applicable to directors of MSBC.

         The Ballston Bylaws in respect to nominations are substantially similar
to MSBC Bylaws  except that any  nomination  for director  made by a shareholder
must be made in writing to the Secretary of Ballston not later than the close of
business on the tenth day  following the date on which notice of such meeting is
first given to shareholders.  Neither the Ballston  Certificate nor the Ballston
Bylaws require  directors of Ballston to own any capital stock of Ballston,  nor
do  they  impose  residency  or  meeting  attendance  requirements.  

Shareholder Proposals.  

         MSBC's Bylaws provide that at any meeting of shareholders of MSBC, only
business  that is properly  brought  before the meeting may be  presented to and
acted upon by the  shareholders.  To be  properly  brought  before the  meeting,
business must be brought (a) by or at the direction of the Board of Directors or
(b) by a  shareholder  who has given  written  notice of  business he expects to
bring  before the  meeting to the  Secretary  of MSBC by  December 1 of the year
preceding the meeting.  A shareholder's  notice to the Secretary shall set forth
as to each matter the  shareholder  proposes  to bring  before the meeting (a) a
brief  description  of the  business  to be brought  before the  meeting and the
reasons for conducting  such business at the meeting,  (b) the name and address,
as they appear on MSBC's books, of the shareholder proposing such business,  (c)
the class  and  number of  shares  of  MSBC's  stock  beneficially  owned by the
shareholder,  and (d) any material interest of the shareholder in such business.
No  business  shall be  conducted  at a meeting  of the  shareholders  except in
accordance with the procedures set forth in MSBC Bylaws.

         Ballston's Bylaws in respect to shareholder proposals are substantially
similar to MSBC Bylaws except that written  notice by a shareholder  that wishes
to bring  business  before a meeting must be received by the Secretary not later
than the close of business on the tenth day  following  the date on which notice
of such meeting is first given to shareholders.

Shareholder   Inspection   Rights;   Shareholder  Lists.  Under  the  VSCA,  the
shareholder  of a Virginia  corporation  is entitled to inspect and copy certain
books and records  including  the  articles of  incorporation  and bylaws of the
corporation  if he or she gives  the  corporation  written  notice of his or her
demand at least five  business days before the date on which he or she wishes to
inspect  and copy.  The  shareholder  of a Virginia  corporation  is entitled to
inspect  and  copy  certain  other  books  and  records,  including  a  list  of
shareholders,  minutes of any meeting of the board of directors  and  accounting
records of the  corporation,  if (i) the  shareholder  has been a shareholder of
record for at least 6 months immediately  preceding his or her written demand or
is the holder of at least 5% of the corporation's  outstanding  shares, (ii) the
shareholder's  demand is made in good faith and for a proper purpose,  (iii) the
shareholder  describes with reasonable  particularity the purpose of the request
and the  records  desired to be  inspected  and (iv) the  records  are  directly
connected with the stated purpose,  and if the shareholder gives the corporation
written  notice of his or her demand at least five business days before the date
on which he or she wishes to inspect  and copy.  The VSCA also  provides  that a
corporation shall make available for inspection by any shareholder  during usual
business hours, at least 10 days before each meeting of shareholders, a complete
list of the shareholders entitled to vote at such meeting.



                                       30
<PAGE>

         As  permitted   under  the  DGCL,   the  Ballston   Bylaws  permit  any
shareholder,  in person or by  attorney  or other  agent,  upon  written  demand
stating the purpose thereof, to examine,  in person or by agent or attorney,  at
any  reasonable  time or times,  for any proper  purpose,  Ballston's  books and
records of accounts,  minutes and record of  shareholders,  and to make extracts
therefrom.

Shareholder  Voting. The VSCA generally requires the approval of a majority of a
corporation's  board of directors and the holders of more than two-thirds of all
the votes  entitled to be cast thereon by each voting group  entitled to vote on
most  amendments  to the  articles  of  incorporation,  any  plan of  merger  or
consolidation,  any plan of share exchange,  or any sale of substantially all of
the assets of a  corporation  not in the ordinary  course of business.  The VSCA
does  permit  such an  amendment  or  transaction  to be approved by as few as a
majority of the votes cast, if the articles of  incorporation so state. The VSCA
does not require a  shareholder  vote of the  surviving  corporation  in a share
exchange  or in a merger  (unless  the  corporation  provides  otherwise  in its
articles  of  incorporation)  if (i) the  merger  agreement  does not  amend the
existing  certificate  of  incorporation;  (ii)  each  share  of  the  surviving
corporation  outstanding  before the merger is an  identical  outstanding  share
after the merger;  and (iii) the number of shares to be issued by the  surviving
corporation in the merger does not exceed directly,  or upon conversion thereof,
20% of the  common  stock  outstanding  immediately  prior  to  the  merger.  In
addition,  the VSCA also specifies additional voting requirements for Affiliated
Transactions  and  transactions  that would cause an acquiring  person's  voting
power  to  meet  or  exceed  specified   thresholds,   as  discussed  hereunder,
"Anti-Takeover Provisions."

          Under the DGCL,  mergers  and  consolidations  generally  require  the
approval  of the holders of a majority  of the  capital  stock  entitled to vote
thereon.  The  DGCL  does  not  require  a  shareholder  vote  of the  surviving
corporation  in a merger  (unless  the  corporation  provides  otherwise  in its
certificate  of  incorporation)  if (i) the merger  agreement does not amend the
existing  certificate  of  incorporation;  (ii)  each  share  of  the  surviving
corporation  outstanding  before  the  merger  is an  identical  outstanding  or
treasury share after the merger;  and (iii) the number of shares to be issued by
the  surviving  corporation  in the  merger  does not exceed  directly,  or upon
conversion thereof, 20% of the common stock outstanding immediately prior to the
merger. In addition,  the DGCL also specifies additional voting requirements for
transactions  that would cause an  acquiring  person's  voting  power to meet or
exceed  specified  thresholds.  However,  such provisions under the DGCL are not
applicable to Ballston. See "Anti-Takeover Provisions."

Anti-Takeover  Provisions.  In addition to the Shareholder's Rights Plan created
by MSBC, as discussed  hereunder,  certain provisions of the VSCA may discourage
an attempt to acquire control of MSBC.

         The VSCA contains provisions governing "Affiliated Transactions." These
provisions,  with  several  exceptions  discussed  below,  require  approval  of
material acquisition  transactions between a Virginia corporation and any holder
of more than 10% of any class of its  outstanding  voting shares (an "Interested
Stockholder")  by the holders of at least  two-thirds  of the  remaining  voting
shares.  Affiliated  Transactions  include mergers,  share  exchanges,  material
dispositions  of corporate  assets not in the ordinary  course of business,  any
dissolution  of  the  corporation  proposed  by or on  behalf  of an  Interested
Stockholder,   or  any  reclassification,   including  a  reverse  stock  split,
recapitalization,  or  merger of the  corporation  with its  subsidiaries  which
increases the  percentage of voting shares owned  beneficially  by an Interested
Stockholder by more than 5%.

         For  three  years  following  the time that an  Interested  Stockholder
becomes an owner of 10% of the outstanding voting shares, a Virginia corporation
cannot  engage in an Affiliated  Transaction  with such  Interested  Stockholder
without  approval of  two-thirds  of the voting  shares  other than those shares
beneficially owned by the Interested  Stockholder,  and majority approval of the
"Disinterested  Directors."  A  Disinterested  Director  is a member of the MSBC
Board who was (i) a member on the date on which an Interested Stockholder became


                                       31
<PAGE>

an Interested  Stockholder and (ii)  recommended for election by, or was elected
to fill a vacancy  and  received  the  affirmative  vote of, a  majority  of the
Disinterested  Directors then on the Board.  At the expiration of the three year
period,  the statute requires approval of Affiliated  Transactions by two-thirds
of the  voting  shares  other than those  beneficially  owned by the  Interested
Stockholder.

         The principal  exceptions to the special  voting  requirement  apply to
transactions proposed after the three year period has expired and require either
that  the   transaction   be  approved  by  a  majority  of  the   corporation's
Disinterested   Directors  or  that  the  transaction   satisfy  the  fair-price
requirements of the statute.  In general,  the fair-price  requirement  provides
that in a two-step acquisition transaction,  the Interested Stockholder must pay
the  shareholders  in the second step either the same amount of cash or the same
amount and type of  consideration  paid to acquire  the  Virginia  corporation's
shares in the first step.

         None of the  foregoing  limitations  and  special  voting  requirements
applies to a transaction  with an Interested  Stockholder  whose  acquisition of
shares making such a person an Interested Stockholder was approved by a majority
of the Virginia corporation's Disinterested Directors.

         These  provisions were designed to deter certain  takeovers of Virginia
corporations.  In addition,  the statute provides that, by affirmative vote of a
majority  of the  voting  shares  other  than  shares  owned  by any  Interested
Stockholder,   a  corporation   can  adopt  an  amendment  to  its  articles  of
incorporation  or bylaws providing that the Affiliated  Transactions  provisions
shall not apply to the  corporation.  MSBC has not "opted out" of the Affiliated
Transactions provisions.

         Virginia law also provides that shares  acquired in a transaction  that
would cause the acquiring  person's voting strength to meet or exceed any of the
three  thresholds  (20%,  33_% or 50%) have no voting rights unless granted by a
majority  vote of  shares  not owned by the  acquiring  person.  This  provision
empowers an  acquiring  person to require  the  Virginia  corporation  to hold a
special  meeting of  shareholders  to consider the matter  within 50 days of its
request.

         The  Ballston  Bylaws  contain   certain   provisions  that  may  limit
shareholder voting rights. These provisions provide for noncumulative voting for
directors  and limit the  calling  of special  meetings.  In  addition,  certain
provisions  under  the  DGCL  may be  deemed  to have an  anti-takeover  effect.
However,  because  Ballston's  Common  Stock is  neither  traded  on a  national
securities market nor Nasdaq, nor is the Ballston Common Stock held of record by
more than 2,000 shareholders,  such provisions of the DGCL are not applicable to
Ballston.

Shareholder  Rights  Agreement.  MSBC has issued the MSBC Rights and is party to
the MSBC Preferred Share Rights Plan. The MSBC Rights have certain anti-takeover
effects and will cause substantial dilution to a person or a group that attempts
to acquire MSBC on terms not  approved by the MSBC board.  See  "Description  of
MSBC Capital  Stock - MSBC Rights  Plan." The  Ballston  Board has not adopted a
shareholders rights plan.

Amendment of Articles or Certificate and Bylaws. The VSCA generally requires the
approval of a majority of a corporation's  board of directors and the holders of
more than two-thirds of all the votes entitled to be cast thereon by each voting
group entitled to vote on most amendments to the articles of incorporation.  The
VSCA does permit such an amendment or  transaction to be approved by as few as a
majority of the votes cast, if the articles of  incorporation so state. The VSCA
and MSBC's Bylaws provide,  in most cases, that the MSBC board of directors may,
by a majority vote, amend its bylaws.



                                       32
<PAGE>

         Under the DGCL, the certificate of incorporation  may be amended if the
amendment is adopted by the board and is approved by an affirmative  vote of the
holders of a majority of the outstanding stock entitled to vote on the amendment
by each  voting  group  entitled  to vote  hereon.  There are no  provisions  in
Ballston's  Certificate which modify the statutory requirements for amendment of
the  certificate.  Under  the  DGCL,  the  bylaws  may be  amended  only  by the
shareholders, unless the corporation's certificate of incorporation also confers
the power to amend the bylaws on the  directors.  As  permitted  under the DGCL,
Ballston's  Certificate  authorizes the Ballston Board to adopt, amend or repeal
the Ballston Bylaws.  The Ballston Bylaws may be amended by action of a majority
of the  Ballston  Board or by a vote of the  holders  of 60% of the  issued  and
outstanding Ballston Common Stock. The stockholders of Ballston may provide that
certain  Bylaws may not be amended,  altered or  repealed  except by a specified
percentage  of  interest  of  the  stockholders  or  of a  particular  class  of
stockholders.

Director Liability and Indemnification. The VSCA provides that in any proceeding
brought  by or in the  right of a  corporation  or  brought  by or on  behalf of
shareholders  of the  corporation,  the damages  assessed  against an officer or
director  arising out of a single  transaction,  occurrence or course of conduct
may not exceed the lesser of (i) the monetary amount,  including the elimination
of liability,  specified in the articles of incorporation or, if approved by the
shareholders,  in the bylaws as a limitation on or  elimination of the liability
of the  officer or  director,  or (ii) the  greater of (a)  $100,000  or (b) the
amount  of cash  compensation  received  by the  officer  or  director  from the
corporation during the twelve months  immediately  preceding the act or omission
for which liability was imposed.  The liability of an officer or director is not
limited under the VSCA or a corporation's  articles of incorporation  and bylaws
if the officer or director engaged in willful  misconduct or a knowing violation
of the criminal law or of any federal or state securities law. The MSBC Articles
eliminate  officers and directors  liability  for monetary  damages and maximize
indemnification,  except in cases of willful  misconduct or knowing violation of
criminal or securities law.

         Under  the DGCL,  a  corporation's  certificate  of  incorporation  may
contain a provision  eliminating or limiting the personal liability of directors
to the  corporation  or its  shareholders  for  monetary  damages  for breach of
fiduciary duty as a director,  but such provision may not eliminate or limit the
liability of a director for (i) any breach of the director's  duty of loyalty to
the corporation or its shareholders, (ii) acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) wilful
or negligent payment of unlawful dividends or stock purchases or redemptions, or
(iv) any  transaction  from  which the  director  derived an  improper  personal
benefit. The Ballston Certificate  provides,  to the fullest extent permitted by
the  DGCL,  that a  director  shall  not be  liable  to the  corporation  or its
shareholders for monetary damages for a breach of fiduciary duty.

         The provisions of the VSCA and the DGCL are substantially  similar with
respect to indemnification of officers and directors. Under the VSCA and DGCL, a
corporation  may  indemnify any officer or director who was or is a party to any
action,  suit,  or proceeding by reason of the fact that he is or was a director
or officer of the  corporation  by,  among other  things,  a majority  vote of a
quorum  consisting  of directors  who were not parties to such action,  suit, or
proceeding,  provided that such officer or director acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the best  interests of
the corporation.

         The  Ballston  Bylaws  provide  for  indemnification  of  officers  and
directors to the fullest extent  permitted by the DGCL. The Ballston Bylaws also
provide  for the  advance  of  expenses  incurred  by a  director  or officer in
defending a proceeding, subject to an undertaking by such director or officer to
repay  such  amount  should  it be  determined  that  he is not  entitled  to be
indemnified  by  Ballston.   These  provisions  are  substantially   similar  to
provisions of the MSBC Articles.



                                       33
<PAGE>

Dividends and Distributions.  The VSCA generally provides that a corporation may
make  distributions  to its  shareholders  unless,  after  giving  effect to the
distribution,  (i) the  corporation  would  not be able to pay its debts as they
become  due in the usual  course of  business  or (ii) the  corporation's  total
assets  would be less than the sum of its total  liabilities  plus  (unless  the
articles of  incorporation  permit  otherwise,  which MSBC  Articles do not) the
amount that would be needed, if the corporation were to be dissolved at the time
of the  distribution,  to satisfy the  preferential  rights upon  dissolution of
shareholders  whose  preferential  rights are  superior to those  receiving  the
distribution.

         The DGCL  generally  allows  dividends to be paid out of surplus of the
corporation  or,  if  there  is no  surplus,  out  of  the  net  profits  of the
corporation  for the current fiscal year or the prior fiscal year. The directors
of  a  Delaware   corporation  are  prohibited  from  making   distributions  to
shareholders except in the manner provided by the DGCL. In case of any wilful or
negligent violation of the provisions of the DGCL governing  distributions,  the
directors under whose  administration  the violation  occurred (except for those
directors who dissented)  are, for a period of six years,  jointly and severally
liable to the corporation and, in the event of the  corporation's  insolvency or
dissolution, to its creditors for the full amount of the distribution unlawfully
made.

         In addition to the above  limitations set forth in the VSCA,  there are
various regulatory  requirements which are applicable to bank holding companies.
MSBC relies  primarily on the ability of its  subsidiaries  to pay  dividends to
MSBC in order  for it,  in turn,  to pay  dividends  to MSBC  shareholders.  The
dividends payable by MSBC banking subsidiaries are dependent upon their earnings
and  profitability  and must be in  compliance  with  certain  federal and state
banking  law  requirements.  Following  consummation  of  the  proposed  Merger,
dividends received by MSBC's shareholders will continue to be dependent upon the
payment  of  dividends  by its  banking  subsidiaries.  Also,  MSBC  has  senior
liabilities  pursuant to guarantees of the Junior  Subordinated  Debentures  and
Capital  Securities of MainStreet  Capital Trust I. See  "Description of Capital
Stock of MSBC."

Liquidation  Rights. The VSCA generally  provides that a corporation's  board of
directors may propose  dissolution for submission to shareholders and that to be
authorized,  the  dissolution  must be  approved  by the  holders  of more  than
two-thirds of all votes entitled to be cast on the proposal, unless the articles
of incorporation of the corporation  require a greater or lesser vote. There are
no provisions in the MSBC's Articles which modify the statutory requirements for
dissolution under the VSCA.

         The DGCL generally provides that a corporation's board of directors may
propose  dissolution for submission to  shareholders  and that a majority of the
whole board of directors  must approve such  resolution  to be  authorized.  The
dissolution  also  must  be  approved  by  the  holders  of a  majority  of  the
outstanding  shares  entitled  to  vote  on  the  proposal.   Dissolution  of  a
corporation  may also be authorized  without  action of the directors if all the
shareholders  entitled to vote thereon  shall  consent in writing.  There are no
provisions in the Ballston's Certificate or Ballston's Bylaws which would modify
the statutory requirements for dissolution under the DGCL.

Appraisal Rights and Rights of Dissenting Shareholders.  Under both the VSCA and
the DGCL, a shareholder of a corporation  participant in certain major corporate
transactions may, under varying  circumstances,  be entitled to appraisal rights
pursuant to which such  shareholder  may receive cash in the amount of the "fair
value"  of  his or  her  shares,  as  determined  by a  court,  in  lieu  of the
consideration he or she would otherwise receive in the transaction. However, the
VSCA further provides that holders of shares of a Virginia corporation which has
shares  listed on a national  securities  exchange  or which has at least  2,000
record  shareholders  are not  entitled to  dissenters'  rights  unless  certain
requirements  are met.  Because  MSBC has more than 2,000  record  shareholders,
shareholders  of MSBC  generally  do not have  rights to dissent  from  mergers,
consolidations  and  certain  other  corporate  transactions  to which MSBC is a
party. For a description of certain  provisions of the DGCL regarding  appraisal
rights see "Rights of  Dissenting  Shareholders"  and Appendix III to this Proxy
Statement/Prospectus.


                                       34
<PAGE>

                          DESCRIPTION OF THE COMPANIES

MainStreet BankGroup Incorporated

         MSBC is a multi-bank  holding company  headquartered  in  Martinsville,
Virginia,  with total assets of $2.0 billion and total  shareholders'  equity of
$155.3  million at March 31, 1998.  Organized  in 1977,  MSBC through its eleven
affiliate banks (the "MainStreet Banks"), and MainStreet Trust Company, National
Association, a nationally chartered trust company (the "Trust Company"), engages
in a general banking business and, through its eleven affiliate banks,  provides
a broad  spectrum  of  full-service  banking and trust  services  to  consumers,
businesses,  institutions and governments,  including accepting demand,  savings
and time  deposits;  making  commercial,  personal,  installment,  mortgage  and
construction loans; issuing letters of credit; and providing discount brokerage,
trust services, bank-card services, mortgage banking and investment services.

         In November  1997,  MSBC created a Delaware  statutory  business  trust
subsidiary ("MainStreet Capital Trust I") which issued approximately $50 million
of trust preferred  securities.  MainStreet  Capital Trust I, then in turn, used
the  proceeds  from  the  sale  of  the  trust   securities  to  acquire  Junior
Subordinated  Debentures of MSBC which have the same rate,  payment of dividends
and maturity.

Ballston Bancorp, Inc.

     Ballston is a one-bank holding company headquartered in Washington, D.C.,
with total assets of $75.7 million and total stockholders' equity of $8.3
million at March 31, 1998. Organized in 1987, Ballston operates through its
wholly-owned subsidiary, The Bank of Northern Virginia ("The Bank"), which
operates as a commercial bank in Arlington and Falls Church, Virginia. The
Bank's primary business consists of attracting deposits from the general public
and originating loans that are secured by residential properties as well as
originating commercial real estate and consumer loans.

                       PROPOSAL II - ELECTION OF DIRECTORS

         The Ballston Board is composed of seven members. The bylaws of Ballston
require that the Board of Directors shall be elected annually.  The nominees set
forth below are being elected for a term expiring in 1999 or, if earlier,  until
the consummation of the Merger.

         It is intended that the persons  named in the proxies  solicited by the
Ballston Board will vote for the election of the named nominees.  If any nominee
is unable to serve,  the shares  represented  by all valid proxies will be voted
for the election of such substitute as the Ballston Board may recommend. At this
time, the Ballston Board knows of no reason why any nominee might be unavailable
to serve.

         Pursuant  to  Article  II,  Section  19  of  the   Ballston's   Bylaws,
nominations,  other  than those made by or at the  direction  of the  Ballston's
Board,  shall be made  pursuant  to a notice  in  writing  to the  Secretary  of
Ballston  that is  delivered  to, or  mailed  and  received  at,  the  principal
executive  offices of Ballston not later than the close of business on the tenth
day  following  the date on  which  notice  of such  meeting  is first  given to
stockholders.  Under the Ballston Bylaws, a shareholder's  notice must set forth
certain specific  information about the person whom the shareholder  proposes to
nominate for election as a director and about the shareholder giving the notice.
If such a  nomination  is properly  made,  ballots  will be provided  for use by
shareholders at the annual meeting bearing the name of such nominee or nominees.



                                       35
<PAGE>

         The following table sets forth information with respect to the nominees
and their name, age,  principal  occupation during the past five years, the year
he or she first  became a director,  the year in which his or her  current  term
will expire and the number of shares and  percentage  of Ballston  Common  Stock
beneficially  owned on the Record  Date.  The table also sets  forth,  as of the
Record  Date,  the  ownership  of  shares  of  Ballston  Common  Stock  by  each
shareholder  known to Ballston to beneficially  own more than 5% of the Ballston
Common Stock outstanding.
<TABLE>
<CAPTION>
<S> <C>
                                                                                                 Shares
                                                                                Year             Common
                                      Position with Ballston and                first            Stock         Percent
                             Age      principal  occupation during the          elected          beneficially    of
Name                         (1)      past five years.                          Director         owned          class
- -----------------------------------------------------------------------------------------------------------------------
Mary E. Fricano,             67       Director of Ballston Bancorp, Inc.;         1997            28,182         1.7
                                      President of 1314 1/2Inc. (real estate
                                      investments); Investor.

Kenneth M. Haggerty,                  Vice Chairman and Director of Ballston      1987            22,182         1.4 (2)
D.D.S.,                      73       Bancorp, Inc.; Vice President-Business
                                      Development, Secretary, Cashier and
                                      Director of The Bank of Northern
                                      Virginia; Chairman and President of
                                      Kenneth M. Haggerty, D.D.S., F.I.C.D.,
                                      P.C. (consulting services); Banker and
                                      Consultant.

Robert F. Kelleher,          64       Chairman, President, Chief Executive        1987           100,100         6.2 (5)
                                      Officer and Director of Ballston Bancorp,
                                      Inc.; Chairman and Chief Executive
                                      Officer of The Bank of Northern
                                      Virginia since 1998; President  and
                                      Director of The Bank of Northern
                                      Virginia since 1988;  since 1982,  partner
                                      of Connecticut/Atlantic  Partnership (real
                                      estate investments).

John E. Kilcarr,             64       Director of Ballston Bancorp, Inc.;         1997               200          -- (4)
                                      Principal of Law Office of
                                      John E. Kilcarr; Attorney.

Helena B. Metzger,           63       Director of Ballston Bancorp, Inc.;         1994           451,893        27.9 (3)
                                      Director of The Bank of Northern
                                      Virginia; Investor.

Paul A. Owens,               73       Director of Ballston Bancorp, Inc.;         1997               200          -- (4)
                                      Principal of Law Offices of Paul A.
                                      Owens (legal services); Attorney.

Edward D. Soma, M.D.,        67       Director of Ballston Bancorp, Inc.;         1993           155,459         9.6 (2)
                                      Chairman and Director of Diagnostic
                                      Medical Imaging, P.A.. (medical
                                      services); Partner of Clinical Radi-
                                      ologists Medical Imaging, P.A. (medical
                                      services); Radiologist.

All Executive Officers and Directors as a group (8 persons)                                      784,716        48.5

Woodlawn Foundation, Inc.                                                                        113,288         7.0 (6)

</TABLE>

(1)  At December 31, 1997.
(2)  Includes  shares of  Ballston  Common  Stock  held  directly  as well as by
     spouses or minor children,  in trust,  and other indirect  ownership,  over
     which shares the individuals effectively exercise sole or shared voting and
     investment power, unless otherwise indicated.
(3)  Includes shares held in the name of the estate of Mrs. Metzger's husband of
     which she is  executrix  and shares  held as trustee for the benefit of her
     two adult children.  Mrs. Metzger disclaims  beneficial  ownership of 2,436
     shares.   Mrs.  Metzger's  address  is  1667  K  Street  N.W.,  Suite  700,
     Washington, D.C. 20006.


                                       36
<PAGE>

(4)  Less than 1%.
(5)  Mr. Kelleher's address is 1667 K Street N.W., Suite 700,  Washington,  D.C.
     20006.
(6)  Woodlawn Foundation,  Inc's address is 524 North Avenue, New Rochelle,  New
     York  10801.  Woodlawn  Foundation,  Inc.  is not a director  or  executive
     officer of Ballston.


Meetings and Committees of the Ballston Board

         Ballston's  Board conducts its business  through meetings of the Board.
During the fiscal  year ended  December  31,  1997,  the  Ballston  Board held 4
regular meetings and 5 special meetings.  No director of Ballston attended fewer
than 75% of the total meetings of the Ballston  Board and committee  meetings on
which such Board member  served during the period.  The Ballston  Board does not
have an audit committee, nominating committee or compensation committee.

         Ballston's full Board of Directors selects the nominees for election as
directors in accordance  with the  Ballston's  Bylaws.  While the Ballston Board
will  consider  nominees  recommended  by  stockholders,  it  has  not  actively
solicited  recommendations  from the Ballston's  shareholders  for nominees nor,
subject  to the  procedural  requirements  set forth in the  Ballston's  Bylaws,
established any procedures for this purpose.

Board Compensation

         During 1997,  members of the Ballston  Board received a fee of $250 per
each  Board  meeting  attended.  For the year ended  December  31,  1997,  total
aggregate fees paid by Ballston to its directors were $11,000.

Executive Compensation

         The  following  table  sets  forth the cash and  non-cash  compensation
concerning  the executive  officers of Ballston or The Bank. No other  executive
officer of either  Ballston  or The Bank had a salary or bonus  during the years
ended December 31, 1997 and 1996 that exceeded $100,000 for services rendered in
all capacities to Ballston or The Bank. Mr. Burroughs  resigned from The Bank on
December 31, 1997.
<TABLE>
<CAPTION>
              Name and                                                         Other Annual           All Other
        Principal Position              Fiscal Year       Salary($)         Compensation ($)(1)     Compensation ($)
        ------------------              -----------       ---------         -------------------     ----------------
<S> <C>
        Robert F. Kelleher                 1997           146,522                    --                 10,912 (2)
        Chairman of the Board
        President and Chief                1996           136,056                    --                 10,835 (3)
        Executive Officer of
        Ballston

        Fred A. Burroughs, III             1997           175,000                    --                  8,104 (2)
        Chairman and Chief
        Executive Officer                  1996           175,000                    --                  8,106 (3)
        of The Bank

</TABLE>

(1)      Aggregate  value  does not  exceed  the lesser of $50,000 or 10% of the
         named executive  officer's (i) total salary for the year; (ii) payments
         of above-market  preferential earnings on deferred compensation;  (iii)
         payments of earnings with respect to long term incentive plans prior to
         settlement  or  maturity;  (iv)  tax  payment  reimbursements;  or  (v)
         preferential discounts on stocks.


                                       37
<PAGE>

(2)      For Mr.  Kelleher,  consists  of a  contribution  of $6,830  for health
         insurance and a matching  contribution  of $4,082 to the profit sharing
         and savings plan.  For Mr.  Burroughs,  consists of a  contribution  of
         $3,604 for health  insurance and a matching  contribution  of $4,500 to
         the profit sharing and savings plan.
(3)      For Mr.  Kelleher,  consists  of a  contribution  of $6,750  for health
         insurance and a matching  contribution  of $4,085 to the profit sharing
         and savings plan.  For Mr.  Burroughs,  consists of a  contribution  of
         $3,606 for health  insurance and a matching  contribution  of $4,500 to
         the profit sharing and savings plan.


Profit Sharing and Savings Plan

         The Bank has adopted an Employees  Profit Sharing and Savings Plan (the
"Plan") effective January 1, 1990.  Employees of The Bank who have completed one
year  of  service  and are at  least  twenty-one  years  old  are  eligible  for
participation in the Plan.  Participants may direct The Bank to contribute up to
15 percent of their pre-tax income  through  payroll  deductions.  The Bank will
provide a matching  contribution of from 25 to 100 percent of the  participant's
contribution, depending upon years of service. The matching scheme is applicable
only to the first 6 percent of the  participant's  pre-tax income.  The Board of
Directors  of The Bank may,  at its own  discretion  from year to year,  vote to
cause  additional  contributions  to be made  to the  Plan  for  all  employees.
Employees  may also make  after-tax  contributions  of up to 15 percent of their
after-tax income. The amounts, within certain limitations, remain non-taxable to
the employee until distribution.

         All Plan assets are held by QUADs Trust, Frederick, Maryland as Trustee
and  invested  in  one  or  more  of  four  mutual  funds  administered  by  the
Massachusetts  Mutual insurance group. The participant directs the Trustee among
investment options. The Trustee has no discretion with respect to the investment
options.  A participant's  account is payable upon his or her retirement or upon
the earlier occurrence of certain defined disabilities,  death or termination of
employment.  The amount payable upon the occurrence of such events is subject to
a  vesting  schedule  under  which  an  employee  becomes  fully  vested  in the
contributions of The Bank after six years of service.

Certain Transactions with Ballston

         The Bank,  like many financial  institutions,  has followed a policy of
granting various types of loans to officers, directors, and employees. The loans
have been made in the ordinary course of business and on substantially  the same
terms, including interest rates and collateral,  as those prevailing at the time
for comparable transactions with The Bank's other customers,  and do not involve
more than the  normal  risk of  collectibility,  or  present  other  unfavorable
features.

             PROPOSAL III - RATIFICATION OF APPOINTMENT OF AUDITORS

         Stoy, Malone & Company,  P.C. was Ballston's  independent  auditors for
the  1997  fiscal  year.  The  Board  presently   intends  to  renew  Ballston's
arrangement with Stoy, Malone & Company, P.C. to be its independent auditors for
the fiscal year ending December 31, 1998, or, if earlier,  until consummation of
the Merger, subject to ratification by Ballston  shareholders.  A representative
of Stoy,  Malone & Company,  P.C.  is not  expected  to be present at the Annual
Meeting.  The Board of Directors  recommends  that  shareholders  vote "FOR" the
ratification of the appointment of auditors.

                                     EXPERTS

         The consolidated  financial  statements of MSBC as of December 31, 1997
and 1996,  and for each of the years in the three year period ended December 31,
1997,  have  been  incorporated  by  reference  herein  and in the  Registration
Statement in reliance upon the report of Coopers & Lybrand  L.L.P.,  independent
certified  public  accountants,  incorporated  by reference  herein and upon the
authority of said firm as experts in accounting and auditing.



                                       38
<PAGE>

         The  consolidated  financial  statements of Ballston as of December 31,
1997 and 1996,  and for each of the years in the two year period ended  December
31, 1997,  included  herein have been audited by Stoy,  Malone & Company,  P.C.,
independent  auditors, as stated in their report appearing herein, and have been
so included in reliance upon the report of such firm given upon their  authority
as experts in accounting and auditing.

                                  LEGAL MATTERS

         The validity of MSBC common stock to be issued to Ballston Shareholders
pursuant to the Merger and certain other legal  matters in  connection  with the
Merger will be passed upon for MSBC by Flippin,  Densmore,  Morse,  Rutherford &
Jessee, A Professional Corporation, Roanoke, Virginia.

                                  OTHER MATTERS

         As of the date of this Proxy Statement,  management of Ballston know of
no other  business  that will come before the Annual  Meeting.  Should any other
matters properly come before the Annual Meeting,  the proxy in the enclosed form
confers upon the person or persons  designated to vote the shares  discretionary
authority to vote the same with respect to any other matter in  accordance  with
the direction of the Ballston Board.





                                       39
<PAGE>



                                   APPENDIX I












                          AGREEMENT AND PLAN OF MERGER

                                      AMONG

                        MAINSTREET BANKGROUP INCORPORATED

                                       AND

                             BALLSTON BANCORP, INC.

                                 MARCH 11, 1998







<PAGE>


                          AGREEMENT AND PLAN OF MERGER


         AGREEMENT AND PLAN OF MERGER,  dated as of the 11th day of March,  1998
(this  "Plan"),  by and among  MainStreet  BankGroup  Incorporated,  a  Virginia
corporation  ("MSBC"),  and  Ballston  Bancorp,  Inc.,  a  Delaware  corporation
("Ballston").

                                    RECITALS:

         (A) MSBC.  MSBC is a  corporation  duly  organized and existing in good
standing  under the laws of the  Commonwealth  of Virginia,  with its  principal
executive offices located in Martinsville, Virginia. As of the date hereof, MSBC
has 20,000,000 authorized shares of Common Stock, each of $5.00 par value ("MSBC
Common Stock"),  and 1,000,000  authorized  shares of Preferred  Stock,  each of
$5.00 par value ("MSBC Preferred  Stock") (no other class of capital stock being
authorized),  of which  13,307,083  shares of MSBC Common Stock and no shares of
MSBC Preferred  Stock,  respectively,  are issued and outstanding as of the date
hereof.  MSBC has eleven (11) wholly  owned bank  subsidiaries:  Piedmont  Trust
Bank, a Virginia  bank;  Bank of Ferrum,  a Virginia  bank;  Bank of Carroll,  a
Virginia bank;  First Community Bank, a Virginia bank; The First Bank of Stuart,
a Virginia bank;  First  Community Bank of Saltville,  a Virginia bank;  Hanover
Bank, a Virginia bank;  First National Bank of Clifton Forge, a national banking
association; Commerce Bank Corporation, a Maryland bank; Tysons National Bank, a
national banking association and Regency Bank, a Virginia bank (each of which is
referred  to as a "MSBC Bank  Subsidiary"  and all of which are  referred  to as
"MSBC Bank  Subsidiaries").  In addition,  MSBC has two wholly owned  nonbanking
subsidiaries,  MainStreet Trust Company, chartered as a limited purpose national
banking  association to engage in the business of a trust company and businesses
incidental thereto ("MSBC Trust Subsidiary") and Tysons Financial Corporation, a
Virginia corporation  ("TFC"),  holder of one hundred percent of the outstanding
shares  of  Tysons  National  Bank.  The  MSBC  Bank  Subsidiaries,  MSBC  Trust
Subsidiary,  and TFC are  individually  referred to as an "MSBC  Subsidiary" and
collectively as "MSBC Subsidiaries".

         (B) Ballston.  Ballston is a corporation duly organized and existing in
good  standing  under  the laws of the  State of  Delaware,  with its  principal
executive offices located at 1667 K Street,  N.W., Suite 700,  Washington,  D.C.
20006,  and is  authorized  to do business as a bank holding  company  under the
federal  Bank  Holding  Company Act of 1956,  as amended,  and Chapter 13 of the
Virginia  Banking  Act.  Ballston's  only  subsidiary  is The  Bank of  Northern
Virginia ("BNV"). As of the date hereof,  Ballston has 500,000 authorized shares
of  Preferred  Stock,  each of $0.20 par value,  none of which  were  issued and
outstanding  as of the date hereof,  and 2,500,000  authorized  shares of Common
Stock,  each of $0.20 par value  ("Ballston  Common Stock"),  of which 1,619,474
shares were issued and  outstanding  as of the date  hereof,  (no other class of
capital stock being  authorized).  The holders of Ballston  Common Stock have no
preemptive  rights.  Ballston  Common Stock is not subject to the  provisions of
Section 12, 13, 14(a), 14(c), 14(d), 15(d) and 16 of the Securities Exchange Act
of 1934, as amended,  (together with the rules and regulations of the Securities
and Exchange Commission ("SEC") promulgated thereunder, the "Exchange Act").

         (C) BNV.  BNV is a  corporation  duly  organized  and  existing in good
standing  under the laws of the  Commonwealth  of  Virginia,  is qualified to do
business  as a bank in  Virginia  and is a member  bank of the  Federal  Reserve
System.  BNV's  headquarters  are located at 1010 North  Glebe Road,  Arlington,
Virginia 22201 BNV has 4,500 shares of common stock,  $1,000 par value per share
("BNV  Common  Stock")  authorized  (no  other  class  of  capital  stock  being
authorized),  of which 3,350  shares are issued and  outstanding  as of the date
hereof, all of which are held of record and beneficially by Ballston.  There are
no shares of BNV Common Stock  authorized and reserved for issuance and there is
no  commitment  to  authorize,  issue  or sell  any  such  shares  or any  other
securities,  warrants or obligations  convertible  into or exchangeable  for, or
giving any right to subscribe for or acquire any such shares and no  securities,
warrants or obligations representing any such rights are outstanding.  There are
no options or share  appreciation  rights  authorized  or granted for BNV Common
Stock and no commitment to grant any such options or share appreciation rights.



                                       2
<PAGE>

         With respect to  Ballston,  any  reference  herein to  "Subsidiary"  or
"Subsidiaries"  refers  to BNV and,  with  respect  to MSBC,  any  reference  to
"Subsidiary"  refers to any MSBC Subsidiary and any reference to  "Subsidiaries"
refers to the MSBC  Subsidiaries,  jointly  and  severally  (unless  the context
otherwise requires).

         (D) Rights,  Etc.  Except as Previously  Disclosed by MSBC or except in
connection with the transactions  contemplated by this Plan, there are no shares
of MSBC  Common  Stock or MSBC  Preferred  Stock  authorized  and  reserved  for
issuance, and MSBC has no commitment to authorize, issue or sell any such shares
or any securities or obligations convertible into or exchangeable for, or giving
any person any right to subscribe for or acquire from MSBC,  any such shares and
no  securities  or  obligations  representing  any such rights are  outstanding.
Except  as  Previously  Disclosed  by  MSBC,  MSBC has not  granted  or made any
commitment to grant any options or share appreciation rights with respect to the
MSBC Common Stock or MSBC  Preferred  Stock.  Except as Previously  Disclosed by
Ballston and except for shares reserved  pursuant to the Stock Option  Agreement
(as  hereinafter  defined),  there  are  no  shares  of  Ballston  Common  Stock
authorized  and  reserved  for  issuance  and  Ballston  has  no  commitment  to
authorize,  issue or sell any such shares, or any other securities,  warrants or
obligations  convertible  into or  exchangeable  for,  or  giving  any  right to
subscribe  for or acquire  from  Ballston any such  shares,  and no  securities,
warrants or obligations representing any such rights are outstanding.

         (E) This  Transaction.  The Boards of Directors  of MSBC and  Ballston,
respectively,  deem it advisable and in the best  interests of MSBC and Ballston
and their  stockholders  that  Ballston be acquired by MSBC  through a merger of
Ballston into MSBC pursuant to this Plan.

         (F) Stock Option  Agreement.  As a condition  and  inducement to MSBC's
willingness  to enter into this Plan,  Ballston  has agreed that  simultaneously
with its entry into this Plan Ballston shall enter into a Stock Option Agreement
with MSBC ("Stock Option  Agreement")  in the form attached  hereto as Exhibit E
pursuant to which Ballston shall grant to MSBC an option ("Option") to purchase,
under certain circumstances, shares of Ballston Common Stock.

         (G) Approvals.  The Board of Directors of each of MSBC and Ballston has
approved and adopted, at meetings of each of such Board of Directors,  this Plan
and  the  Stock  Option  Agreement  and has  authorized  the  execution  of such
instruments  in  counterparts  by a member of the Office of the Chairman of MSBC
and by the Chairman,  President and Chief Executive Officer or the Vice Chairman
or any other officer of Ballston designated by either of them, respectively, and
any further  modifications  to such  instruments  as may be agreed by an officer
authorized  to  execute  this  Plan  and  the  Stock  Option  Agreement  and not
inconsistent with the authorizations of their respective Board of Directors.  At
the  meeting of the  Ballston  Board of  Directors,  the Board of  Directors  of
Ballston recommended the Plan as so executed to its shareholders.

         (H) NASDAQ.  Trading of the MSBC Common Stock is presently  reported on
the National  Association of Securities  Dealers ("NASD")  Automated  Quotations
System National Market System ("Nasdaq National Market").
Ballston Common Stock is not traded on any established exchange or market.

         (I)  Benefits  of Plan.  MSBC  and  Ballston  believe  the Plan and its
consummation  are in the respective  best interests of each  corporation and its
shareholders  for the  following  reasons,  among  others:  (1) the  Merger  (as
hereinafter  defined) will allow them to provide  banking and related  financial
services more effectively and efficiently;  (2) the Merger will expand the range
of banking and related financial services which they can provide; (3) the Merger
will enhance the safety and soundness of their  operations;  (4) the Merger will


                                       3
<PAGE>

enable  them to expand  the  market  for their  banking  and  related  financial
services;  (5) Ballston  shareholders  who will become MSBC  shareholders in the
Merger will benefit from the larger and more  diverse  shareholder  base of MSBC
and  enhanced  liquidity of their  equity  investments;  and (6) no gain or loss
generally will be recognized by  stockholders  of Ballston who receive shares of
MSBC Common Stock in exchange for their shares of Ballston Common Stock.

         NOW,   THEREFORE,   in  consideration  of  their  mutual  promises  and
obligations, the parties hereto adopt and make this Plan and prescribe the terms
and  conditions  thereof and the manner and basis of  carrying  it into  effect,
which shall be as follows:

                                  I. THE MERGER

         (A) The  Continuing  Corporation.  On the  Merger  Effective  Date  (as
hereinafter defined) Ballston shall merge into MSBC (the "Merger"), the separate
existence of Ballston shall cease and MSBC (the "Continuing  Corporation") shall
survive.

         (B)  Rights,  Etc.  Upon  consummation  of the Merger,  the  Continuing
Corporation   shall  thereupon  and  thereafter   possess  all  of  the  rights,
privileges,  immunities  and  franchises,  of a public  as well as of a  private
nature, of each of the merging  corporations;  and all property,  real, personal
and  mixed,  and all  debts due on  whatever  account,  and all other  choses in
action,  and all and every other interest,  of or belonging to or due to each of
the  corporations  so  merged,  shall be deemed  to be vested in the  Continuing
Corporation without further act or deed; and the title to any real estate or any
interest therein, vested in any of such corporations,  shall not revert or be in
any way  impaired  by  reason  of the  Merger  as  provided  by the  laws of the
Commonwealth of Virginia.

         (C)  Liabilities.  Upon  consummation  of the  Merger,  the  Continuing
Corporation shall thenceforth be responsible and liable for all the liabilities,
obligations and penalties of each of the corporations so merged.

         (D)  Articles  of  Incorporation;   Bylaws;   Directors;   Officers  of
Continuing  Corporation.   The  Articles  of  Incorporation  of  the  Continuing
Corporation shall be those of MSBC, and the Bylaws of the Continuing Corporation
shall be those of MSBC. The officers and directors of MSBC in office immediately
prior to the Merger  becoming  effective  shall be the officers and directors of
the  Continuing  Corporation,  who shall  hold  office  until such time as their
successors are elected and qualified in accordance  with the Articles and Bylaws
of the Continuing Corporation.

         (E) Merger  Closing;  Merger  Effective  Date.  The Merger shall become
effective  on the  date  and  time the  Virginia  State  Corporation  Commission
("Virginia Corporation Authority") issues a certificate of merger reflecting the
Merger (the "Merger Effective  Date").  As soon as reasonably  practicable after
the satisfaction or waiver,  if permissible,  of the conditions to the Merger as
set forth in Article VI, the parties  shall cause the Merger  Effective  Date to
occur by executing  and filing (i) the  Articles of Merger  containing a Plan of
Merger in substantially  the form of Exhibit A1 hereto (the "Plan of Merger") in
accordance  with the relevant  provisions of the Virginia Stock  Corporation Act
("VSCA"),  and (ii) the  Certificate  of  Merger  in  substantially  the form of
Exhibit A2 (the  "Certificate  of Merger") in accordance with section 252 of the
General  Corporation  Law of the State of Delaware (the  "DGCL").  All documents
required  by the  terms  of  this  Agreement  to be  delivered  at or  prior  to
consummation  of the Merger will be  exchanged  by the parties at the closing of
the Merger (the "Merger Closing"), which shall be held on the Friday of the week
following the  satisfaction  of the conditions set forth in Paragraphs  (A), (B)
and (C) of Article VI, or on such other date as the parties may mutually  agree,
but no later than the Merger Effective Date.  Prior to the Merger Closing,  MSBC
and Ballston shall deliver to the Virginia Corporation Authority (as hereinafter
defined), the Articles of Merger including the Plan for pre-approval.



                                       4
<PAGE>

                            II. MERGER CONSIDERATION

         (A)  Outstanding  MSBC Common  Stock.  The shares of MSBC Common  Stock
issued and outstanding  immediately prior to the Merger Effective Date shall, on
and after the Merger  Effective Date,  remain issued and  outstanding  shares of
MSBC Common Stock.

         (B) Outstanding  Ballston Common Stock.  Each share  (excluding  shares
held by  Ballston,  BNV or by MSBC or by any of the MSBC  Subsidiaries,  in each
case other than in a  fiduciary  or  custodial  capacity or as a result of debts
previously  contracted (the "Excluded  Shares")) of Ballston Common Stock issued
and outstanding  immediately prior to the Merger Effective Date shall, by virtue
of the  Merger,  automatically  and without any action on the part of the holder
thereof on the Merger Effective Date,  become and be converted into the right to
receive  that  number of shares of MSBC  Common  Stock  (the  "Exchange  Ratio")
obtained  (subject to the next  following  sentence)  by dividing  $12.04 by the
average of the bid price and the asked price per share for MSBC Common  Stock as
reported on the Nasdaq  National Market for each of the twenty (20) trading days
preceding the tenth  calendar day prior to the Merger  Effective  Date ("Average
MSBC Share Price") (which, together with cash required to be paid for fractional
shares under Section II(D) is referred to as the "Merger Consideration"). If the
ratio computed in accordance  with the  immediately  preceding  sentence is less
than 0.4025,  the Exchange  Ratio shall be 0.4025,  and if the ratio computed in
accordance with the immediately  preceding  sentence is greater than 0.4920, the
Exchange Ratio shall be 0.4920.

         (C) Stockholder Rights; Stock Transfers.  On the Merger Effective Date,
holders of Ballston Common Stock shall cease to be, and shall have no rights as,
stockholders   of   Ballston   other  than  the  right  to  receive  the  Merger
Consideration.  After the Merger  Effective Date, there shall be no transfers on
the stock transfer books of Ballston or the Continuing Corporation of the shares
of Ballston Common Stock which were issued and outstanding  immediately prior to
the Merger becoming effective.

         (D) Fractional Shares.  Notwithstanding  any other provision hereof, no
fractional shares of MSBC Common Stock and no certificates or scrip therefor, or
other evidence of ownership thereof, will be issued in the Merger; instead, MSBC
shall pay to each  holder of  Ballston  Common  Stock  who  would  otherwise  be
entitled to a fractional  share an amount in cash determined by multiplying such
fractional share by the Average MSBC Share Price.

         (E) Exchange  Procedures.  As promptly as practicable  after the Merger
Effective Date,  MSBC shall send or cause to be sent to each former  stockholder
of Ballston of record immediately prior to the Merger Effective Date transmittal
materials for use in exchanging such stockholder's  certificates of Ballston for
the  Merger  Consideration.   Any  fractional  share  checks  which  a  Ballston
stockholder  shall be  entitled to receive in  exchange  for such  stockholder's
shares of Ballston  Common Stock,  and any dividends  paid on any shares of MSBC
Common Stock,  that such  stockholder  shall be entitled to receive prior to the
delivery to MSBC of such  stockholder's  certificates  representing  all of such
stockholder's  shares  of  Ballston  Common  Stock  will  be  delivered  to such
stockholder  only upon delivery to MSBC (or to whomever MSBC shall  designate in
the transmittal  materials) of the certificates  representing all of such shares
(or indemnity satisfactory to MSBC, in its judgment, if any of such certificates
are lost, stolen or destroyed).  No interest will be paid on any such fractional
share checks or  dividends  which the holder of such shares shall be entitled to
receive  upon such  delivery.  After the Merger  Effective  Date,  to the extent
permitted by law, former stockholders of record of Ballston shall be entitled to
vote at any meeting of holders of MSBC Common Stock,  the number of whole shares
of MSBC Common Stock into which their respective shares of Ballston Common Stock
are  converted,   regardless  of  whether  such  holders  have  exchanged  their
certificates  representing  Ballston Common Stock for certificates  representing
MSBC Common Stock in accordance with the provisions of this Plan.



                                       5
<PAGE>

         (F) Shares Held by  Ballston  or MSBC.  All  Excluded  Shares  shall be
canceled and retired at the Merger Effective Date and no consideration  shall be
issued in exchange therefor.

         (G) Anti-Dilution  Provisions.  In the event MSBC changes the number of
shares of MSBC Common Stock issued and outstanding prior to the Merger Effective
Date as a result of a stock split, stock dividend,  recapitalization  or similar
transaction with respect to the outstanding MSBC Common Stock (but not including
shares issued in connection with a merger, share exchange or similar transaction
whose  primary  purpose is the  acquisition  for value of a going  concern or in
connection  with a  dividend  reinvestment  plan or a grant  of  stock  or stock
options  to one or more  employees  or  directors  or the  exercise  of any such
options)  and the record date  therefor  shall be prior to the Merger  Effective
Date, the Exchange Ratio shall be proportionately  adjusted by multiplying it by
a fraction  the  numerator of which is the number of shares of MSBC Common Stock
outstanding  immediately  after such transaction and the denominator of which is
the number of shares of MSBC Common Stock  outstanding  immediately  before such
transaction.

         (H) Dividends.  Ballston shareholders shall not under any circumstances
be entitled to any dividend  (cash or otherwise)  declared by MSBC with a record
date prior to the Merger Effective Date.

                           III. ACTIONS PENDING MERGER

         A.  Ballston  Actions.  From the date  hereof  until the earlier of the
Merger  Effective  Date or  termination  under  Article  VII,  without the prior
written consent or approval of MSBC:

         1.  Forbearances.  Ballston will not and will cause its  Subsidiary not
to:

                  (a) Stock  Distributions.  Make,  declare or pay any  dividend
other than cash dividends on Ballston  Common Stock or BNV Common Stock,  as the
case may be, consistent with past practice and in an amount not greater than the
last  previous  cash  dividend   declared  prior  hereto  by  Ballston  or  BNV,
respectively,  as Previously Disclosed,  or declare or make any distribution on,
or directly or indirectly  combine,  redeem,  reclassify,  purchase or otherwise
acquire, any shares of its capital stock (other than in a fiduciary or custodial
capacity  in the  ordinary  course  of its  business  and  consistent  with past
practice or in connection  with stock received on a debt  previously  contracted
basis) or authorize the creation or issuance of, or issue, any additional shares
of its capital stock, or any options, calls, warrants or commitments relating to
its  capital  stock  or  any  securities  or  obligations  convertible  into  or
exchangeable  for,  or giving any person any right to  subscribe  for or acquire
from it shares of its capital stock or any securities or obligations convertible
into or  exchangeable  for shares of its capital  stock,  or issue any long-term
debt;

                  (b) Employment Contracts.  Enter into any employment contracts
with,  increase the rate of  compensation of (except in accordance with existing
policy consistent with past practice and Previously Disclosed or required by any
agreement  existing  and  as  in  effect  on  the  date  hereof  and  Previously
Disclosed), or pay or agree to pay any bonus to, any of its directors,  officers
or employees,  except in accordance with plans or agreements  existing and as in
effect on the date hereof and Previously Disclosed;

                  (c) Employee  Benefit  Plans.  Enter into or modify (except as
may be required by applicable law) any pension,  retirement, stock option, stock
purchase,  savings, profit sharing,  deferred compensation,  consulting,  bonus,
group insurance or other employee benefit,  incentive or welfare contract,  plan
or arrangement, or any trust agreement related thereto, in respect of any of its
directors, officers or other employees,  including without limitation taking any
action that  accelerates  (1) the vesting or  exercise of any  benefits  payable
thereunder,  or (2) the right to exercise  any employee  stock  options or stock
appreciation rights outstanding thereunder;



                                       6
<PAGE>

                  (d) Asset Disposition.  Sell, lease or otherwise dispose of or
grant  or  allow  to arise an  encumbrance,  lien or  security  interest  on any
property or assets or discontinue  using any assets or properties or discontinue
any business or operations except in the ordinary course of business  consistent
with  past  practice  or  merge  or  consolidate  with,  or  acquire  all or any
substantial  portion of, the  business or property of any other  entity  (except
foreclosures,  acquisitions of control in its fiduciary or custodial capacity or
securitization  transactions,  in each case in the  ordinary  course of business
consistent with past practice);

         (e)  Constituent  Documents.   Amend  or  restate  its  Certificate  of
Incorporation or Bylaws as delivered to MSBC in connection with this Plan;

                  (f) Material Transactions.  (a) Settle any litigation or legal
proceeding  brought  by or  against  it or claim  of or  against  it  (involving
individually  or in the  aggregate  more than  $50,000)  or (b)  enter  into any
material  transaction  or make any material  commitment  relating to its assets,
business, operations or properties (including but not limited to any acquisition
thereof),  otherwise than as  contemplated  hereby or in the ordinary  course of
business  consistent  with past practice and in any case obligating it to expend
after the Merger Effective Date more than $50,000 in all such transactions;  (c)
incur any  indebtedness  for  borrowed  money or assume,  guarantee,  endorse or
otherwise become  responsible for the obligations of any person or entity except
in the ordinary course of business  consistent with past practice;  (d) make any
material  investment  in or purchase  any material  securities  of any person or
entity; or (e) cancel or allow any of its existing insurance policies to lapse;

         (g) Actions Not in Ordinary Course. Take any action not in the ordinary
course of business consistent with past practice;

                  (h)  Accounting.  Alter in any way the  manner in which it has
regularly and customarily maintained its books of account and records, or change
any of its accounting principles or methods by which such principles are applied
for tax,  regulatory  or  reporting  purposes,  except as  required by law or by
generally accepted accounting principles.

                  (i) Agreements. Agree to take any of the foregoing actions.

         2. Conduct of Business. Ballston will and will cause its Subsidiary to:

                  (a) Ordinary Course.  Conduct its business and operations only
in the ordinary and usual course and in a manner  consistent with past practices
and use reasonable efforts to preserve intact its present business  organization
and keep available its present  officers and employees  material to its business
and operations.

                  (b)  Notification.  Notify MSBC (i) of any emergency or change
in the normal  conduct of the  Business,  (ii) of any event,  occurrence,  fact,
condition,  change or effect that,  individually or in the aggregate,  has or is
reasonably   expected  to  have  a  Material  Adverse  Effect  or  breach  of  a
representation  or warranty set forth in Article (IV) or a covenant or agreement
set  forth in this  Article  V which  has or is  reasonably  expected  to have a
Material  Adverse Effect and (iii) of the threat or initiation of any litigation
against it.

                       IV. REPRESENTATIONS AND WARRANTIES

         Ballston  hereby  represents  and  warrants  to MSBC  and  MSBC  hereby
represents and warrants to Ballston as follows:



                                       7
<PAGE>

         (A)  Recitals.  The facts set forth in the  Recitals  of this Plan with
respect to it and its respective Subsidiaries are true and correct.

         (B)  Capitalization.  The  outstanding  shares of it and its respective
Subsidiaries are validly issued and outstanding,  fully paid and  nonassessable,
and subject to no preemptive rights.

         (C) General  Corporate  Power and Ownership of  Properties.  It and its
respective Subsidiaries have the corporate power and authority to carry on their
respective  business as now being  conducted and to own all of their  respective
material  properties and assets and have good and marketable title to or a valid
and existing  leasehold  interest in all of the material  properties  and assets
thereof  reflected  as owned or leased in its balance  sheet as of December  31,
1997,  and  included in the MSBC Reports and  Ballston  Reports (as  hereinafter
defined) and in all material  properties and assets  acquired or leased by it or
its  respective  Subsidiaries,  since December 31, 1997. In the case of Ballston
and its  Subsidiary  only,  none of its  properties  is subject to any mortgage,
pledge, lien, security interest, encumbrance,  restriction or charge of any kind
or any  provision  terminating  or altering or giving the right to  terminate or
alter the terms and  conditions of its use and  enjoyment  thereof on account of
any change of control or ownership except: (1) mechanic's,  carrier's,  worker's
or similar liens arising in the ordinary  course of business;  (2) as Previously
Disclosed;  (3)  imperfections  of title,  if any,  none of which is material in
amount or materially  detracts from the value or impairs the existing use of the
property  subject thereto or the operations of Ballston or its  Subsidiary;  and
(4) liens of current taxes not due and payable.

         (D) Specific Corporate  Authority.  Subject to any necessary receipt of
approval  by its  stockholders  and  the  regulatory  approvals  referred  to in
Paragraphs  (B) and (C) of  Article  VI,  this Plan has been  authorized  by all
necessary  corporate  action of it and is a valid and  binding  agreement  of it
enforceable against it in accordance with its terms,  subject to (1) bankruptcy,
insolvency  and other laws of general  applicability  relating  to or  affecting
creditors' rights;  and (2) general equity principles.  In the case of Ballston,
it  represents  and  warrants to MSBC that the Stock Option  Agreement  has been
authorized  by all necessary  corporate  action of it and is a valid and binding
agreement of it enforceable against it in accordance with its terms subject only
to conditions (1) and (2) in the immediately preceding sentence.

         (E) No Default.  The execution,  delivery and  performance of this Plan
and, in the case of Ballston, the Stock Option Agreement and the consummation of
the transactions contemplated hereby and thereby by it, will not constitute: (1)
a breach of violation of, or a default under, any law, rule or regulation or any
judgment, decree, order, governmental permit or license, franchise or agreement,
indenture,  instrument or  authorization  applicable to, of or held by it or its
Subsidiaries,  or to which  it,  its  Subsidiaries  or its or its  Subsidiaries'
respective  properties are subject or bound, which breach,  violation or default
is reasonably likely to have a Material Adverse Effect on it; or (2) a breach or
violation of, or a default under, its or its Subsidiaries'  respective  Articles
of  Incorporation  or Bylaws;  or (3) except as Previously  Disclosed,  create a
right of  termination,  default in or change in terms and  conditions  of use or
enjoyment of any real or personal property it uses in its business.

         (F) MSBC  Reports.  In the case of MSBC only,  and except as Previously
Disclosed,  (1)  MSBC's  Annual  Report on Form 10-K for the  fiscal  year ended
December 31, 1996, and all other  documents  filed or to be filed  subsequent to
December 31, 1996 under Sections  13(a),  13(c), 14 or 15(d) of the Exchange Act
in the form filed with the SEC, all of which have been Previously Disclosed (all
of the foregoing  reports and documents of MSBC are  hereinafter  referred to as
its "MSBC  Reports")  did not and will not  contain  any untrue  statement  of a
material fact or omit to state a material fact required to be stated  therein or
necessary to make the  statements  made therein,  in light of the  circumstances
under which they were made, not misleading; and each of the balance sheets in or
incorporated by reference into the MSBC Reports (including the related notes and
schedules  thereto)  fairly  presents  and will  fairly  present  the  financial
position  of the entity or  entities to which it relates as of its date and each
of the statements of income and changes in  stockholders'  equity and cash flows


                                       8
<PAGE>

or equivalent  statements in the MSBC Reports  (including  any related notes and
schedules  thereto)  fairly  presents  and will  fairly  present  the results of
operations,  changes in  stockholders'  equity and changes in cash flows, as the
case may be, of the entity or  entities  to which it relates for the periods set
forth therein,  in each case in accordance  with generally  accepted  accounting
principles  consistently  applied,  except as may be noted  therein,  subject to
normal  and  recurring  year-end  audit  adjustments  in the  case of  unaudited
statements.

         (G) Ballston  Reports.  In the case of Ballston only, it has Previously
Disclosed to MSBC copies of (1) Ballston's  Consolidated  Financial  Statements,
for the  years  ended  December  31,  1994,  1995,  1996  and  1997;  (2)  BNV's
"Consolidated  Report of Condition and Income" for the years ended  December 31,
1994,  December  31,  1995,  December 31, 1996 and December 31, 1997 and for any
subsequent period(s) as delivered to the appropriate bank regulatory  authority;
(3) all other reports and  documents  filed with or sent to any federal or state
regulatory  authority by it or BNV during 1996, 1997 and 1998 (as of the date of
this Agreement); and (4) to the extent not prohibited by law, all reports of any
state or federal regulatory  authority relating to it or BNV and received during
or relating to matters in 1996,  1997 or 1998 (as of the date of this Agreement)
(all of the  foregoing  reports and  documents  are  hereinafter  referred to as
"Ballston  Reports").  Ballston represents and warrants to MSBC: (a) that, as of
their  respective  dates,  the Ballston Reports referred to in (1) and (2) above
are  accurate  and complete  and fairly  present the  financial  position of the
entity or entities to which they relate and each of the statements of income and
changes  in  stockholders'  equity  and  cash  flows  or  equivalent  statements
(including any related notes and schedules  thereto)  fairly present the results
of operations,  changes in stockholders equity and changes in cash flows, as the
case may be, of the entity or  entities  to which it relates for the periods set
forth  therein;  (b) that the Ballston  Statements  referred to in (1) have been
prepared  in  accordance   with  generally   accepted   accounting   principles,
consistently  applied;  and (c) that, as of their  respective dates the Ballston
Reports referred to in (2) and (3) above complied in all material  respects with
all legal and  regulatory  requirements  applicable  thereto  and no  additional
reports or documents or amendments to previously filed reports or documents were
required to be filed by Ballston with any federal or state regulatory  authority
during such periods except as Previously Disclosed.

         (H)  Material  Events.  Except as  Previously  Disclosed,  no event(s),
occurrence(s),  condition(s), or circumstance(s),  whether known or unknown, has
or have occurred  which has or is  reasonably  likely to have at any future time
(individually or in the aggregate) a Material Adverse Effect on it.

         (I)  Litigation.   Except  as  Previously  Disclosed,   no  litigation,
proceeding  or  controversy  before  any  court or  governmental  agency  and no
mediation or arbitration is pending which has or is reasonably likely to have at
any  future  time a  Material  Adverse  Effect  on it  and,  to the  best of its
knowledge, no such litigation, proceeding, controversy, mediation or arbitration
has been  threatened  and no claim has been  asserted  which  could lead to such
litigation, proceeding, controversy, mediation or arbitration.

         (J) Material Contracts.  Except as Previously  Disclosed and except for
this Plan and the Stock Option Agreement, neither it nor any Subsidiary is bound
by any material contract (as to it and its Subsidiaries  taken as a whole) to be
performed in whole or part after the date hereof.

         (K)  Commissions.  All  negotiations  relative  to  this  Plan  and the
transactions  contemplated  hereby have been carried on by it directly  with the
other parties  hereto and no action has been taken by it that would give rise to
any valid claim  against any party hereto for a brokerage  commission,  finder's
fee or other like payment,  excluding a fee in an amount Previously Disclosed to
Danielson Associates, Inc., who has acted as financial advisor to Ballston.



                                       9
<PAGE>

         (L)      ERISA.  Except as Previously Disclosed:

                  (1) all "employee benefit plans" within the meaning of Section
3(3)  of the  Employee  Retirement  Income  Security  Act of  1974,  as  amended
("ERISA"),  covering employees or former employees of it and/or its Subsidiaries
(the  "Employees") are Previously  Disclosed,  true and complete copies of which
have been made available to the other party;

                  (2) all employee  benefit  plans  covering  Employees,  to the
extent  subject to ERISA (the  "ERISA  Plans"),  are in  compliance  with ERISA,
except for failure to so comply which are not reasonably likely, individually or
in the aggregate, to have a Material Adverse Effect on it; each ERISA Plan which
is an  "employee  pension  benefit  plan"  within the meaning of Section 3(2) of
ERISA  ("Pension  Plan") and which is intended  to be  qualified  under  Section
401(a) of the Internal Revenue Code of 1986, as amended (the "Code"),  except as
Previously  Disclosed  has  received a favorable  determination  letter from the
Internal Revenue Service, and it has no knowledge of any circumstances likely to
result in the revocation of any such favorable determination letter; there is no
pending or, to the best of its knowledge,  threatened litigation relating to the
ERISA Plans which is reasonably  likely,  individually  or in the aggregate,  to
have a Material  Adverse  Effect on it; and  neither it nor any  Subsidiary  has
engaged in a  transaction  with  respect to any ERISA  Plan that,  assuming  the
taxable period of such transaction expired as of the date hereof,  would subject
it or the  Subsidiary to a tax or penalty  imposed by either Section 4975 of the
Code or  Section  502(i)  of ERISA in an  amount  which  is  reasonably  likely,
individually or in the aggregate, to have a Material Adverse Effect on it;

                  (3) no  liability  under  Subtitle C or D of Title IV of ERISA
has been or is expected to be incurred by it or any  Subsidiary  with respect to
any ongoing, frozen or terminated  "single-employer plan", within the meaning of
Section 4001(a)(15) of ERISA, currently or formerly maintained by any of them or
any entity which is considered  one "employer"  with it or any Subsidiary  under
Section  4001(a)(14) of ERISA or Section 414 of the Code (an "ERISA Affiliate"),
which  liability is reasonably  likely to have a Material  Adverse Effect on it;
neither  it nor any  Subsidiary  has  incurred  and does not expect to incur any
withdrawal  liability with respect to a  multiemployer  plan under Subtitle E of
Title IV of ERISA; and to its knowledge no notice of a "reportable event" within
the meaning of Section 4043 of ERISA for which the 30-day reporting  requirement
has not been waived,  has been  required to be filed for any Pension Plan or the
Pension Plan of an ERISA Affiliate within the 12-month period ending on the date
hereof;

                  (4) during the current plan year and the immediately preceding
three plan years of such ERISA Plan, all contributions required to be made under
the terms of any ERISA Plan of it or an ERISA  Affiliate  have been timely made;
and no pension  plan of it or an ERISA  Affiliate  has an  "accumulated  funding
deficiency"  (whether  or not  waived)  within the meaning of Section 412 of the
Code or Section 302 of ERISA which is reasonably likely,  individually or in the
aggregate, to have a Material Adverse Effect on it;

                  (5) under each Pension Plan which is a  single-employer  plan,
as of the last day of the most recent plan year ended prior to the date  hereof,
the actuarially  determined present value of all "benefit  liabilities",  within
the meaning of Section  4001(a)(16)  of ERISA (as determined on the basis of the
actuarial  assumptions  contained  in the ERISA  Plan's  most  recent  actuarial
valuation)  did not  exceed the then  current  value of the assets of such ERISA
Plan, and there has been no material adverse change in the financial position of
such ERISA Plan since the last day of the most recent plan year; and

                  (6) there are no material current or projected liabilities for
retiree health or life insurance benefits.



                                       10
<PAGE>

         (M)  Regulatory  Approvals.  It knows of no reason  why the  regulatory
approvals  referred  to in  Paragraphs  (B) and (C) of  Article VI should not be
obtained  without the imposition of any condition of the type referred to in the
proviso following such Paragraph (C).

         (N) Agreements  with Bank  Regulators.  Except as Previously  Disclosed
neither it nor any Subsidiary is a party to any written  agreement or memorandum
of  understanding  with,  or  a  party  to  any  commitment  letter  or  similar
undertaking  to, or is subject to any order or  directive  by, or a recipient of
any  extraordinary  supervisory  letter from, any bank regulator which restricts
the conduct of its business,  or in any manner relates to its capital  adequacy,
its credit or reserve policies or its management, nor has it been advised by any
bank  regulator that it is  contemplating  issuing or requesting any such order,
decree,  agreement,  memorandum  of  understanding,   extraordinary  supervisory
letter, commitment letter or similar submission.

         (O) Subsidiaries.  In the case of Ballston only, it has no subsidiaries
other than BNV, all of the outstanding shares of which are validly issued, fully
paid and  nonassessable  (except  pursuant to 12 USC ss. 55 or comparable  state
law,  if  any)  and are  owned  by it  free  and  clear  of all  liens,  claims,
encumbrances and restrictions on transfer whatsoever.  In the case of MSBC only,
its only Subsidiaries are the MSBC  Subsidiaries,  all of the outstanding shares
of which are validly issued, fully paid and nonassessable (except pursuant to 12
USC ss. 55 or  comparable  state  law) and are owned by it free and clear of all
liens, claims, encumbrances and restrictions on transfer whatsoever.

         (P) Collective Bargaining Contracts. Neither it nor any Subsidiary is a
party to or is bound by any collective bargaining  agreement,  contract or other
agreement or  understanding  with a labor union or labor  organization or is the
subject of a proceeding  asserting  that it or the  Subsidiary  has committed an
unfair labor practice  (within the meaning of the National Labor  Relations Act)
or seeking to compel it or the Subsidiary to bargain with any labor organization
as to wages and conditions of employment. There is not any strike or other labor
dispute  involving it or any Subsidiary and to the best of its knowledge none is
threatened. It is not aware of any activity involving the employees of it or any
Subsidiary  seeking to certify a collective  bargaining  unit or engaging in any
other organization activity.

         (Q)  Classified  Assets and Loan and Lease Loss  Reserve.  Ballston has
Previously  Disclosed a list of the loans,  extensions of credit or other assets
of BNV that were  classified  by the  examiners  of the  Federal  Reserve  Board
("FRB")  or by the  Bureau  of  Financial  Institutions  of the  Virginia  State
Corporation  Commission  ("Virginia  Bank  Regulator")  in its  last  respective
preceding examination ("BNV Asset  Classification") and has Previously Disclosed
a list of its loans and  extensions of credit by BNV in the  respective  initial
principal  amount of $10,000 or more, any payment of which is, as of the date so
disclosed, delinquent ("BNV Delinquent Loan List"). The BNV Asset Classification
and the BNV Delinquent Loan List are, respectively, accurate and complete in all
material  respects  and no  loans,  extensions  of credit  or other  assets  (or
portions thereof) that have been classified as of the respective date of the BNV
Asset  Classification  by any  regulatory  examiner  as "Other  Loans  Specially
Mentioned",  "Substandard",  "Doubtful",  "Loss", or words of similar import are
excluded from the amounts disclosed in the BNV Asset  Classification  other than
amounts of loans,  extensions of credit or other assets that were charged off by
BNV prior to the respective date of the BNV Asset Classification. BNV's loan and
lease loss reserve as Previously  Disclosed to MSBC are  reasonably  believed by
Ballston  and  BNV  to be  adequate  as of the  date  thereof  and no  event(s),
occurrence(s),  condition(s) or circumstance(s)  has or have occurred which have
had, will have, or are reasonably  likely  (individually or in the aggregate) to
have the effect of  rendering  such loan and lease loss  reserve  inadequate  or
causing a material addition to the reserve to be made.



                                       11
<PAGE>

         (R)  Affiliates.  In the case of Ballston  only,  except as  Previously
Disclosed, to the best of its knowledge,  there is no person who, as of the date
of this Plan,  may be deemed to be an  "affiliate" of it as that term is used in
Rule 145 under the Securities  Act of 1933, as amended  (together with the rules
and regulations thereunder, the "Securities Act"; hereinafter the Securities Act
and the Exchange Act are referred to as the "Federal Securities Laws").

         (S)  Insurance  Policies.  In the case of  Ballston  only,  it has made
available to MSBC correct and complete copies of all of its or its  Subsidiary's
insurance policies respecting the properties, operations, liabilities, officers,
directors  and employees  thereof,  all of which are in full force and effect or
provide  coverage  to  it or  its  Subsidiary  and  their  respective  officers,
directors and employees.

         (T) MSBC  Stock.  In the case of MSBC only,  the shares of MSBC  Common
Stock to be issued in  exchange  for shares of Ballston  Common  Stock will have
been duly authorized and, when issued in accordance with the terms of this Plan,
will  be  validly  issued,  fully  paid  and  nonassessable  and  subject  to no
preemptive rights.

         (U)  Takeover  Laws.  In the case of  Ballston  only,  it has taken all
necessary  action to exempt the  transactions  contemplated by this Plan and the
Stock Option Agreement from, or the  transactions  contemplated by this Plan and
the Stock Option  Agreement  are otherwise  exempt from,  any  applicable  state
takeover  laws in effect as of the date of this Plan,  including  section 203 of
the DGCL.

         (V) Approval of This Transaction.  In the case of Ballston only, it has
taken all  action so that the  entering  into of this Plan and the Stock  Option
Agreement  and the  consummation  of the  transactions  contemplated  hereby and
thereby  (including  without  limitation  the  Merger)  or any  other  action or
combination  of  actions,  or any  other  transactions,  contemplated  hereby or
thereby do not and will not (1)  require a vote of  stockholders  (other than as
set forth in  Paragraph  (A) of Article  VI);  or (2) result in the grant of any
rights to any person under its Certificate of Incorporation or Bylaws or, except
as  granted  hereunder  or under the Stock  Option  Agreement  or as  Previously
Disclosed,  under  any  agreement  (including  but  not  limited  to any  rights
contingent  on a  merger  or  change  in  control  in any  lease  or  employment
agreement);  or (3) except as set forth in Paragraphs (B) and (C) of Article VI,
and  Section 8 of the Stock  Option  Agreement,  require any consent or approval
under any law, rule, regulation, judgment, decree, order, governmental permit or
license or, except as Previously Disclosed, the consent or approval of any other
party to any agreement,  indenture or  instrument;  or (4) restrict or impair in
any way the ability of MSBC to exercise  the rights  granted  hereunder or under
the Stock Option Agreement.

         (W) Environmental Laws. As to Ballston only, (1) to its knowledge,  it,
its Subsidiary,  the  Participation  Facilities and the Loan Properties (each as
defined below) are, and have been, in compliance with all Environmental Laws (as
defined below),  except for instances of noncompliance  which are not reasonably
likely,  individually or in the aggregate,  to have a Material Adverse Effect on
it;

                  (2)  there is no  proceeding  pending  or,  to its  knowledge,
threatened  before any  court,  governmental  agency or board or other  forum in
which it,  its  Subsidiary,  or any  Participation  Facility  has been,  or with
respect to threatened proceedings,  reasonably would be expected to be, named as
a defendant  or  potentially  responsible  party (a) for  alleged  noncompliance
(including by any predecessor) with any Environmental Law or (b) relating to the
release or threatened release into the environment of any Hazardous Material (as
defined  below),  whether  or not  occurring  at or on a site  owned,  leased or
operated by it, its Subsidiary or any  Participation  Facility,  except for such
proceedings  pending or threatened that are not reasonably likely,  individually
or in the aggregate, to have a Material Adverse Effect on it;

                  (3)  to its  knowledge,  there  is no  proceeding  pending  or
threatened  before any  court,  governmental  agency or board or other  forum in
which any Loan  Property,  it or its Subsidiary is or with respect to threatened
proceedings,  reasonably  would  be  expected  to be,  named as a  defendant  or
potentially  responsible party (a) for alleged  noncompliance  (including by any
predecessor)  with any  Environmental  Law or (b)  relating  to the  release  or
threatened  release into the environment of any Hazardous  Material,  except for
such  proceedings   pending  or  threatened  that  are  not  reasonably  likely,
individually or in the aggregate, to have a Material Adverse Effect on it;



                                       12
<PAGE>

                  (4) to its  knowledge,  there is no  reasonable  basis for any
proceeding of a type described in subparagraphs (2) or (3) above;

                  (5)  to  its  knowledge,  during  the  period  of  its  or its
Subsidiary's  (a)  ownership  or operation  of any of their  respective  current
properties,  (b) participation in the management of any Participation  Facility,
or (c)  holding of a security  interest in a Loan  Property,  there have been no
releases of Hazardous  Material in, on,  under or affecting  any such  property,
Participation  Facility or Loan Property,  except for such releases that are not
reasonably likely,  individually or in the aggregate, to have a Material Adverse
Effect on it;

                  (6) to  its  knowledge,  prior  to  the  period  of its or its
Subsidiary's:  (a)  ownership or operation  of any of their  respective  current
properties,  (b) participation in the management of any Participation  Facility,
or (c) holding of a security interest in a Loan Property, there were no releases
of  Hazardous   Material  in,  on,  under  or  affecting   any  such   property,
Participation  Facility or Loan Property,  except for such releases that are not
reasonably likely,  individually or in the aggregate, to have a Material Adverse
Effect on it;

                  (7) the  following  definitions  apply  for  purposes  of this
Paragraph (W): "to its knowledge" means the actual knowledge of or actual notice
(which if pursued with due care would lead to actual  knowledge)  to any officer
of Ballston,  any information contained in the business records of Ballston and,
with respect to any "Loan Property",  any information  contained in a Phase I or
Phase II environmental  assessment furnished to Ballston;  "Loan Property" means
any  property  owned by it or its  Subsidiary  or in which it or its  Subsidiary
holds a security  interest,  and,  where  required by the context,  includes the
owner or  operator of such  property,  but only with  respect to such  property;
"Participation  Facility"  means  any  facility  in which  it or its  Subsidiary
participates in the management and, where required by the context,  includes the
owner or  operator or such  property,  but only with  respect to such  property;
"Environmental  Law"  means  (a) any  federal,  state and  local  law,  statute,
directive,   ordinance,  rule,  regulation,   code,  by  law,  license,  permit,
authorization,  approval,  consent,  legal doctrine,  order,  judgment,  decree,
injunction,  requirement  or agreement  with any  governmental  entity,  legally
binding  policy or guideline  relating to (i) the  protection,  preservation  or
restoration  of  the  indoor  or  ambient   environment  or  natural   resources
(including,  without limitation,  air, water vapor, surface water,  groundwater,
drinking water supply,  surface land,  subsurface land, plant and animal life or
any other natural resource),  or to human health or safety, or (ii) the exposure
to,  or the use,  storage,  recycling,  treatment,  generation,  transportation,
processing,  handling,  labeling,  production,  release or disposal of Hazardous
Material,  in each case as  amended  and as now in  effect,  including,  without
limitation, the federal Comprehensive Environmental Response,  Compensation, and
Liability Act of 1980,  the Superfund  Amendments and  Reauthorization  Act, the
Federal  Water  Pollution  Control Act of 1972,  the federal  Clean Air Act, the
Federal Clean Water Act, the Federal  Resource  Conservation and Recovery Act of
1976 (including the Hazardous and Solid Waste Amendments  thereto),  the Federal
Solid Waste Disposal Act and the Federal Toxic  Substances  Control Act, and the
Federal  Insecticide,  Fungicide and Rodenticide  Act, the Federal  Occupational
Safety and Health Act of 1970, each as amended and as now in effect, and (b) any
common law or equitable  doctrine  (including,  without  limitation,  injunctive
relief and tort  doctrines  such as  negligence,  nuisance,  trespass and strict
liability) that may impose  liability or obligations for injuries or damages due
to, or  threatened  as a result of, the presence of or exposure to any Hazardous
Material;  "Hazardous  Material" means any substance presently listed,  defined,
designated  or  classified as hazardous,  toxic,  radioactive  or dangerous,  or
otherwise  regulated,  under any Environmental Law, whether by type or quantity,
and includes,  without  limitation,  any oil or other petroleum  product,  toxic
waste, pollutant,  contaminant,  hazardous substance, toxic substance, hazardous
waste,  special  waste or petroleum or any  derivative  or  by-product  thereof,
radon,  radioactive  material,  asbestos,  asbestos  containing  material,  urea
formaldehyde foam insulation, lead and polychlorinated biphenyl.



                                       13
<PAGE>

         (X) Taxes.  Except as  Previously  Disclosed,  to its knowledge (1) all
reports and returns with  respect to Taxes (as defined  below) that are required
to be filed by or with  respect  to it or its  Subsidiaries,  including  without
limitation  consolidated  federal  and state  income  tax  returns of it and its
Subsidiaries  (collectively,  the "Tax  Returns"),  have  been  duly  filed,  or
requests for extensions have been timely filed and have not expired, for periods
ended on or prior to December 31, 1996,  and on or prior to the date of the most
recent fiscal year end immediately  preceding the Merger Effective Date,  except
to the extent all such  failures to file,  taken  together,  are not  reasonably
likely to have a Material  Adverse Effect on it, and such Tax Returns were true,
complete and accurate in all material  respects,  (2) all material  taxes (which
shall mean federal,  state,  local or foreign income,  gross receipts,  windfall
profits,  severance,   property,   production,   sales,  use,  license,  excise,
franchise,  employment,  withholding  or similar  taxes  imposed on the  income,
properties or operations of it and its Subsidiaries, together with any interest,
additions, or penalties with respect thereto and any interest in respect of such
additions or  penalties,  collectively  the "Taxes")  shown to be due on the Tax
Returns  have  been  paid in full,  (4) the  amounts  accrued  for  Taxes in the
Ballston  Reports  and the MSBC  Reports are  sufficient  for the payment of all
Taxes of that company and its  Subsidiary,  whether or not  disputed,  which are
properly  accruable,  (5) all Taxes due with  respect to  completed  and settled
examinations  have been paid in full or  properly  reserved,  (6) no issues have
been raised by the relevant taxing  authority in connection with the examination
of  any  of  the  Tax  Returns  which  are  reasonably  likely  to  result  in a
determination  that  would  have a  Material  Adverse  Effect  on it,  except as
reserved  against in the  Ballston  Reports or in the MSBC  Reports,  and (5) no
waivers of statutes of limitations (excluding such statutes that relate to years
currently under  examination by the Internal Revenue Service) have been given by
or requested with respect to any Taxes of it or its  Subsidiaries  and there are
no  agreements  by it or its  Subsidiary  for  the  extension  of  time  for the
assessment of any Taxes.

         (Y)  Legal  Compliance.  Except  as  Previously  Disclosed,  it and its
Subsidiaries  are in  compliance  with all  applicable  laws,  statutes,  rules,
regulations,  ordinances,  orders,  decrees,  or resolutions of any governmental
authority  or agency or court  relating  or  applicable  to the conduct of their
respective  businesses,  operations,  employment  practices  or  relating to the
ownership  or use of their  respective  properties  which either alone or in the
aggregate have or are reasonably likely to have a Material Adverse Effect on it.

         (Z) Certain Interests.  Except in arm's length transactions pursuant to
normal  commercial terms and conditions,  no executive officer or director of it
or its Subsidiaries has any material interest in any property, real or personal,
tangible or  intangible,  used in or  pertaining  to the  business of it and its
Subsidiaries, except for the usual rights of a shareholder in it; no such person
is indebted to it,  except for normal  business  expense  advances and for loans
made,  in the  case of  MSBC,  by an MSBC  Bank  Subsidiary,  and in the case of
Ballston,  by BNV, in each case in full compliance  with the law,  including but
not limited to,  Regulation O of the FRB and in the ordinary course of business;
and it is not  indebted to such person  except for amounts due under  normal and
disclosed  compensation  arrangements  or  reimbursement  of  ordinary  business
expenses.

         (AA)  Licenses.  It and its  Subsidiaries  have in effect all rights to
tradenames,  trademarks,  service marks,  patents,  patent  rights,  copyrights,
whether  domestic  or  foreign  (as  well  as  applications,   registrations  or
certificates  therefor,   inventions,   trade  secrets,  proprietary  processes,
software and other intellectual property rights ("Intellectual  Property"),  and
all other approvals, authorizations,  consents, licenses, clearances, and orders
of and  registrations  with all  governmental  and  regulatory  authorities  the
failure to have and comply with which  either  alone or in the  aggregate  would
have a Material Adverse Effect on it or, in any case, subject it to liability of
$50,000 or more, individually or in the aggregate.



                                       14
<PAGE>

         (BB) Liabilities. Except to the extent reflected or reserved against in
the MSBC Reports, as to MSBC and its Subsidiaries,  and in the Ballston Reports,
as to  Ballston  and  BNV,  and  except  as  Previously  Disclosed,  it and  its
Subsidiaries  have no material  liability or  obligation  of any nature  whether
accrued, absolute, contingent or otherwise and whether due or to become due.

         (CC) Ten Percent Shareholders.  Except as Previously Disclosed,  it has
no shareholder who owns of record or beneficially 10% or more of the outstanding
shares of Ballston  Common Stock,  or MSBC Common Stock, as the case may be, and
there  is no  person  known  to it who,  directly  or  indirectly,  through  any
contract,  arrangement,  understanding,  relationship or otherwise has or shares
(1) voting  power which  includes  the power to vote or to direct the voting of,
such shares and/or (2) investment power,  which includes the power to dispose or
to direct the disposition,  of 10% or more of the outstanding shares of Ballston
Common  Stock or MSBC Common  Stock,  as the case may be (all of the  foregoing,
"10%  Ownership").  There  is no  person  to  its  knowledge  who,  directly  or
indirectly,  has  created or uses a trust,  proxy,  power of  attorney,  pooling
arrangement  or any other  contract,  arrangement  or device with the purpose or
effect of divesting  such person of 10% Ownership or  preventing  the vesting of
10%  Ownership.  A person  shall  also be  deemed to be a  beneficial  owner for
purposes of the  foregoing  if that  person has the right to acquire  beneficial
ownership of such shares within 60 days.

         (DD) Option Shares. In the case of Ballston only, the Option Shares (as
defined in the Stock Option  Agreement) when issued upon exercise of the Option,
will  be  validly  issued,  fully  paid  and  nonassessable  and  subject  to no
preemptive rights.

         (EE) Articles and Bylaws.  In the case of Ballston only, true,  correct
and current copies of its and its  Subsidiary's  Articles of  Incorporation  (or
Association) and bylaws have been delivered to MSBC.

         (FF) MSBC  Shareholder  Approval.  In the case of MSBC, the approval of
the Merger by the holders of shares of MSBC Common Stock is not required.

         (GG) Pooling of Interests.  It has taken no action that would cause the
Merger to fail to qualify for pooling of interests accounting treatment.

         (HH) Year 2000. It has Previously Disclosed:  (1) the amount it and its
Subsidiaries  have  spent  or  budgeted  to  be  spent  for  Year  2000  related
remediation;  (2) it and its  Subsidiaries'  Year  2000 plan  relating  to their
business, their operations (including operating systems) and their relationships
with customers,  suppliers,  vendors and borrowers and the present status of the
plan's completion; and (3) any anticipated Year 2000 problems of which they have
knowledge  which  individually  or in the aggregate have or are likely to have a
Material Adverse Effect.

                                  V. COVENANTS

         Ballston  hereby  covenants  to MSBC,  and  MSBC  hereby  covenants  to
Ballston, that:

         (A) Reasonable  Best Efforts to Complete  Merger.  Subject to the terms
and  conditions of this Plan, it shall use its  reasonable  best efforts in good
faith to take,  or cause to be  taken,  all  actions,  and to do, or cause to be
done, all things necessary,  proper or desirable,  or advisable under applicable
laws, to permit  consummation of the Merger within the time contemplated by this
Agreement and to otherwise enable consummation of the transactions  contemplated
hereby and by the Stock  Option  Agreement  and shall  cooperate  fully with the
other parties hereto to that end (it being understood that any amendments to the
Registration  Statement (as hereinafter  defined) or a resolicitation of proxies
as a  consequence  of an  acquisition  agreement  by MSBC shall not violate this
covenant),  including  (1) using its best  efforts to lift or rescind  any order
adversely  affecting its ability to  consummate  the  transactions  contemplated
herein  and in the  Stock  Option  Agreement  and to cause to be  satisfied  the
conditions referred to in Article VI and in the Stock Option Agreement, and each
of Ballston and MSBC shall use, and shall cause their respective Subsidiaries to


                                       15
<PAGE>

use,  their  respective  best  efforts to obtain all consents  (governmental  or
other)   necessary  or  desirable  for  the  consummation  of  the  transactions
contemplated by this Plan and the Stock Option Agreement; and (2) in the case of
Ballston,  cooperating  with  MSBC in  supplying  such  information  as MSBC may
reasonably request in connection with any public offerings of securities by MSBC
prior to the Merger Effective Date.  Notwithstanding the foregoing, in the event
that one party  hereto  notifies the other party  pursuant to  Paragraph  (B) of
Article VII that a breach has occurred in this Plan, either party shall have the
option of suspending  its  obligations  under this Paragraph or Paragraph (O) of
this Article until such time as the breach has been cured.

         (B) Ballston  Proxy  Statement.  In the case of Ballston  only,  (1) it
shall  promptly  prepare  and  provide to MSBC prior to its filing and mailing a
proxy statement (the "Proxy  Statement") to be mailed to the holders of Ballston
Common  Stock  in  connection  with  the  Merger  and to be  filed  by MSBC in a
registration statement (the "Registration  Statement") with the SEC, which shall
conform  to  all  applicable  legal  requirements;   (2)  without  limiting  the
foregoing,  at the time such Proxy  Statement  or any  amendment  or  supplement
thereto  is  mailed  to  holders  of  Ballston  Common  Stock  and at all  times
thereafter up to and including the meeting of Ballston  shareholders referred to
in  Subparagraph  (3) of this  Paragraph  (B),  the  Proxy  Statement  and  such
amendments  and  supplements  will  comply  in all  material  respects  with the
provisions  (to the extent  applicable) of the Exchange Act and will not contain
any  untrue  statement  of a  material  fact or omit to  state a  material  fact
required to be stated  therein or  necessary  to make the  statements  contained
therein not misleading; provided, however, in no event shall any party hereto be
liable  for any  untrue  statement  of a material  fact or  omission  to state a
material fact in the Proxy  Statement  made in reliance  upon, and in conformity
with, written information concerning another party furnished by such other party
specifically for use in the Proxy Statement; (3) it shall hold a special meeting
(the  "Meeting") of the holders of Ballston  Common Stock as soon as practicable
after the  Registration  Statement  has become  effective for purposes of voting
upon this  Plan,  the Plan of Merger  and the  Merger  contemplated  hereby  and
thereby,  and (4) it shall use its best  efforts to solicit and obtain  votes of
the holders of Ballston  Common Stock in favor of the above  proposals and shall
once,  at MSBC's  request,  recess  or  adjourn  the  Meeting  for a period  not
exceeding ten days (unless Ballston  consents to a longer period) if such recess
or adjournment is deemed by MSBC to be necessary or desirable.

         (C) Registration Statement Contents. When the Registration Statement or
any post-effective  amendment or supplement thereto shall become effective,  and
at all times subsequent to such  effectiveness,  up to and including the date of
the Meeting,  such  Registration  Statement and all  amendments  or  supplements
thereto,  with respect to all information  set forth therein  furnished or to be
furnished  by  Ballston  relating  to Ballston  and its  Subsidiary  and by MSBC
relating  to MSBC and the MSBC  Subsidiaries  (1) will  comply  in all  material
respects with the  provisions  of the  Securities  Act and any other  applicable
statutory  or  regulatory  requirements,  and (2) will not  contain  any  untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated  therein  or  necessary  to make the  statements  contained  therein  not
misleading;  provided, however, in no event shall any party hereto be liable for
any untrue  statement of a material fact or omission to state a material fact in
the  Registration  Statement  made in reliance  upon,  and in  conformity  with,
written  information  concerning  another  party  furnished  by such other party
specifically  for use in the  Registration  Statement.  In  connection  with the
preparation  of  the   Registration   Statement  and  related   Prospectus/Proxy
Statement,  each will cooperate with the other and will furnish the  information
concerning itself required by law to be included therein.

         (D) Effectiveness of Registration Statement. MSBC will advise Ballston,
promptly after MSBC receives notice thereof,  of the time when the  Registration
Statement has become effective or any supplement or amendment has been filed and
becomes  effective or of the issuance of any stop order or the suspension of the
qualification of the MSBC Common Stock for offering or sale in any jurisdiction,
of the initiation or threat of any  proceeding  for any such purpose,  or of any
request by the SEC for the amendment or supplement of the Registration Statement
or for additional information.



                                       16
<PAGE>

         (E) Public Announcements.  It agrees that, unless approved by the other
party  hereto  in  advance,  it will not  issue any  press  release  or  written
statement  for general  circulation  relating to the  transactions  contemplated
hereby, except as otherwise required by law or applicable NASD or stock exchange
rule.

         (F) Review of Information.

                  (1) Upon  reasonable  notice,  it shall afford the other party
hereto, and its officers,  employees,  counsel, accountants and other authorized
representatives,  access,  during normal  business  hours  throughout the period
prior to the Merger Effective Date, to all of its properties,  books, contracts,
commitments,  properties  and records to the extent  permitted by law and to its
officers,  employees,  counsel  and  accountants,  authorizing  each  of them to
discuss fully with the other party's representatives all matters related to this
Plan,  the  transactions  contemplated  hereby  and the  condition,  operations,
business,  assets or properties of such party. During such period, it shall also
furnish  promptly to the other party hereto (a) a copy of each material  report,
schedule  and other  document  filed by it pursuant to the  requirements  of the
Federal Securities Laws or any state laws, rules and regulations  regulating the
issuance,  sale or  exchange  of  securities  or the markets in which any of the
foregoing  occurs ("Blue Sky Law(s)" which together with the Federal  Securities
Laws are hereinafter  referred to as the "Securities Laws") or banking laws, and
(b) all other information  concerning its business,  properties and personnel as
the other parties hereto may reasonably request. The foregoing process is herein
referred to as "due  diligence".  No due  diligence  by any party or the results
thereof  shall  affect or be deemed  to  modify or waive any  representation  or
warranty made by any other party hereto or the  conditions to the  obligation of
the first party to consummate the transactions contemplated by the Plan.

                  (2)  Each  party  hereto  agrees  not to use  any  information
obtained in due  diligence  for any purpose  unrelated to its  evaluation of the
transactions  contemplated by this Plan and the Stock Option  Agreement.  If the
Merger is not  consummated,  each party will hold all  information and documents
obtained in due diligence in confidence (as provided in Paragraph (F) of Article
VIII) except to the extent that  disclosure  to a third party is for the purpose
of assisting in the assessment of such  information or documents for purposes of
evaluating this Plan and its  consummation (in which case reasonable steps shall
be taken to preserve  the  confidentiality  thereof) and in any event unless and
until such time as such information or documents become publicly available other
than by reason of any action or failure to act by such party or as it is advised
by  counsel  that  any  such  information  or  document  is  required  by law or
applicable  NASD or stock  exchange  rule to be  disclosed.  In the event of the
termination  of this Plan,  each party will,  upon  request by the other  party,
deliver to the other all documents so obtained by it or destroy such documents.

         (G) No  Solicitation.  In the case of Ballston only, from and including
the date of this Plan until the Merger Effective Date or the termination of this
Plan  pursuant to its terms,  (1) it shall not, and shall  direct the  officers,
directors,  employees and other persons  affiliated  with it and any  investment
banker, attorney,  accountant or other representative of it, not to, directly or
indirectly,  solicit or encourage  inquiries  or  proposals  with respect to, or
(except as required by the fiduciary duties of its Board of Directors as advised
in writing by its counsel in connection  with an  unsolicited  bona fide written
proposal)  furnish any nonpublic  information  relating to or participate in any
negotiations or discussion  concerning,  any acquisition or purchase of all or a
substantial portion of the assets of, or a substantial equity interest in, it or
any merger or other business  combination  with it other than as contemplated by
this Plan,; (2) shall notify MSBC immediately if any such inquiries or proposals
are  received  by, or any such  negotiations  or  discussions  are  sought to be
initiated with, it; (3) shall instruct its officers, directors, agents, advisors
and affiliates to refrain from doing any of the foregoing; and (4) shall furnish
to MSBC copies of all documents  reviewed or received by it in  connection  with
any inquiries, proposals, negotiations and discussions referred to in Subsection
(G)(2).



                                       17
<PAGE>

         (H) Filing of  Registration  Statement.  In the case of MSBC  only,  it
shall, as promptly as practicable  following the date of this Plan,  prepare and
file the Registration Statement with the SEC and MSBC shall use its best efforts
to  cause  the  Registration  Statement  to be  declared  effective  as  soon as
practicable after the filing thereof.

         (I) Blue Sky.  In the case of MSBC  only,  it shall use its  reasonable
best  efforts  to  obtain,  prior  to the  effective  date  of the  Registration
Statement, all necessary Blue Sky Law permits and approvals,  provided that MSBC
shall not be required by virtue thereof to submit to general jurisdiction in any
state.

         (J)  Affiliates.  In the case of  Ballston  only,  it will use its best
efforts to cause each  person who may be deemed to be an  "affiliate"  of it for
purposes  of Rule 145 under the  Securities  Act, no later than thirty (30) days
after the date  hereof  (and  within ten (10) days  after any person  becomes an
"affiliate"  thereafter),  to execute and deliver to MSBG a letter  agreement in
the form  attached  hereto as  Exhibit B  restricting  the  disposition  of such
affiliate's  shares of Ballston Common Stock and the shares of MSBC Common Stock
to be received by such person in exchange for such  person's  shares of Ballston
Common Stock.

         (K) Ballston's  Policies and  Practices.  In the case of Ballston only:
Ballston  shall and shall cause its Subsidiary to use its best efforts to modify
and change its credit, investment,  asset-liability management, risk management,
litigation,  and real estate  valuation  policies and practices  (including loan
classifications  and levels of reserves) prior to the Merger Closing so as to be
consistent  on a mutually  satisfactory  basis with those of MSBC and  generally
accepted accounting principles.  Additionally,  Ballston hereby agrees to accrue
all investment banking, legal and accounting costs associated with this Plan and
the  transactions  contemplated  hereby  between  the date of this  Plan and the
anticipated  Effective  Date.  Except as provided in the  immediately  preceding
sentence,  Ballston  shall not be required  to modify or change any  policies or
practices,  however,  until  (x)  satisfaction  of the  conditions  set forth in
Paragraphs  (A),  (B) and (C) of Article VI, (y) such time as Ballston  and MSBC
shall  reasonably  agree that the  Merger  Closing  will  occur  prior to public
disclosure  of such  modifications  or  changes  in  regular  periodic  earnings
releases or periodic reports filed with the SEC or other applicable governmental
authority  available to the public,  and (z) such time as MSBC  acknowledges  in
writing that all  conditions to MSBC's  obligation to consummate the Merger (and
MSBC's rights to terminate  this Plan) have been waived or satisfied;  provided,
however, that in all circumstances Ballston shall and shall cause its Subsidiary
to make such  modifications  and changes not later than immediately prior to the
Merger  Effective  Date.  Ballston's  representations,  warranties and covenants
contained  in the Plan  shall not be deemed  to be  untrue  or  breached  in any
respect  for any  purpose  as a  consequence  of any  modifications  or  changes
undertaken solely on account of this Paragraph (K).

         (L) State  Takeover  Laws.  In the case of Ballston  only, it shall not
take any action  that would  cause the  transactions  contemplated  by this Plan
and/or the Stock Option Agreement to be subject to any applicable state takeover
statute and shall take all  necessary  steps to exempt (or ensure the  continued
exemption of) the  transactions  contemplated  by this Plan and the Stock Option
Agreement from, or if necessary  challenge the validity or applicability of, any
applicable state takeover law, as now or hereafter in effect, including, without
limitation, Section 203 of the DGCL.

         (M) Ballston Special  Shareholder Rights. In the case of Ballston only:
(1) it shall take all  necessary  steps to ensure that the entering into of this
Plan and the Stock Option  Agreement and the  consummation  of the  transactions
contemplated hereby and thereby (including without limitation the Merger and the
exercise of the Option) and any other action or combination  of actions,  or any
other transactions  contemplated hereby or thereby do not and will not result in
the grant of any rights to any person  under the  Articles of  Incorporation  or
Bylaws of Ballston  or under any  agreement  (including  any lease,  credit,  or
employment, severance or officer, director or employee compensation agreement or
plan) to which  Ballston  is a party  (other  than as  Previously  Disclosed  by
Ballston); or (2) it shall not restrict or impair in any way the ability of MSBC
to exercise the rights granted hereunder or under the Stock Option Agreement.



                                       18
<PAGE>

         (N) Shareholder Approval.  In the case of Ballston,  only, it shall not
adopt any plan or other arrangement granting any rights to any shareholders that
would  adversely  affect in any way MSBC's  rights  under this Plan or the Stock
Option  Agreement and, in the case of MSBC only, it shall not amend the terms of
its Participating  Cumulative Preferred Stock, Series A, of which 100,000 shares
are  authorized  but unissued as of December 31, 1997,  in a manner that affects
holders of Ballston Common Stock in a disproportionate manner.

         (O)  Notice of  Adverse  Events.  It shall  promptly  (but in any event
within ten days after  discovering  the same)  notify the other party  hereto in
writing of any event(s),  occurrence(s),  condition(s) or circumstance(s)  which
alone or in the  aggregate  results  or is  reasonably  likely  to result in the
inaccuracy of any warranty or  representation or warranty or the material breach
of any covenant or agreement in this Plan of the party discovering the same.

         (P)  Government  Applications.  In the  case of  MSBC  only,  it  shall
promptly  prepare and submit an  application  to the FRB and the  Virginia  Bank
Regulator for approval of the Merger and promptly make all  appropriate  filings
to secure all other approvals,  consents and rulings which are necessary for the
consummation  of the Merger by MSBC.  Both MSBC and Ballston will use their best
efforts to obtain and will cooperate with each other in making  applications for
such approvals or other actions  advisable in the  reasonable  judgment of MSBC,
with the consent of Ballston,  such consent not to be unreasonably  withheld, to
consummate  the  Merger  including,  but not  limited  to,  promptly  furnishing
information  relating  to it and  its  Subsidiaries  required  to be  set  forth
therein;  provided,  however, that any approval shall not require a change which
materially adversely impacts the economic or business benefits to either MSBC or
Ballston  of  the  transactions  contemplated  by  this  Plan  so as  to  render
inadvisable  the  consummation  of the Merger in the  reasonable  opinion of the
Board of Directors of either MSBC or Ballston.

         (Q) Environmental Tests. Ballston and its Subsidiary will allow MSBC to
conduct, through designated representatives, environmental and engineering tests
provided that no test or information discovered pursuant thereto shall be deemed
to affect or modify or waive any representation or warranty made by Ballston.

                  VI. CONDITIONS TO CONSUMMATION OF THE MERGER.

         Consummation of the Merger is conditioned upon:

         (A)  Shareholder  Approval.  Approval  of  the  Merger  and  the  other
transactions   contemplated  hereby  (including  any  actions   contemplated  by
Paragraph  (L) of Article  VIII) by the requisite  vote of the  stockholders  of
Ballston.

         (B) Specific  Regulatory  Approval.  Procurement of the approval by the
FRB and the Virginia Bank  Regulator of the Merger and  procurement of all other
regulatory consents and approvals applicable to financial institutions and their
holding  companies  and  satisfaction  of  all  other  regulatory   requirements
applicable to financial  institutions and their holding companies  necessary for
consummation of the Merger,  and the expiration of the statutory waiting periods
relating thereto.

         (C)   General   Governmental   Approval.   Procurement   of  all  other
governmental  consents and approvals  (including  but not limited to approval of
Articles of Merger by the Virginia  Corporation  Authority) and  satisfaction of
all other requirements prescribed by law which are necessary to the consummation
of the Merger;  provided,  however, that no approval or consent in Paragraph (B)
or (C) of this Article VI shall have imposed any condition or requirement  which
would materially  adversely  impact the economic or business  benefits to either
MSBC or Ballston of the  transactions  contemplated by this Plan so as to render
inadvisable the consummation of the Merger.



                                       19
<PAGE>

         (D) No  Countervening  Orders.  There shall not be in effect any order,
decree or  injunction  of any court or agency  of  competent  jurisdiction  that
enjoins or prohibits consummation of the Merger.

         (E) Accountants'  Reports as to MSBC.  Ballston and its directors shall
have received from Coopers & Lybrand letters, dated the date of or shortly prior
to (i) the mailing of the Proxy  Statement,  and (ii) the Merger Effective Date,
in  form  and  substance   satisfactory  to  Ballston  with  respect  to  MSBC's
consolidated  financial position and results of operations,  which letters shall
be based upon customary specified procedures undertaken by such firm.

         (F) Accountants' Reports as to Ballston.  MSBC shall have received from
Stoy,  Malone & Company,  P.C.,  dated the date of or  shortly  prior to (1) the
mailing of the Proxy  Statement,  (2) the public  offerings of any securities by
MSBC prior to the Merger  Effective Date, and (3) the Merger  Effective Date, in
form and substance  satisfactory  to MSBC with respect to  Ballston's  financial
position and results of operations,  which letters shall be based upon customary
specified procedures undertaken by such firm.

         (G) MSBC Legal Opinion.  Ballston shall have received an opinion, dated
the Merger  Effective Date, of Flippin,  Densmore,  Morse,  Rutherford & Jessee,
P.C.,  counsel  for  MSBC,  in form and  substance  reasonably  satisfactory  to
Ballston, which shall cover the matters contained in Exhibit C hereto.

         (H) Ballston  Legal  Opinion.  MSBC and its  directors and officers who
sign the Registration Statement shall have received an opinion, dated the Merger
Effective  Date of  Duane,  Morris  &  Heckscher,  LLP,  in form  and  substance
reasonably  satisfactory  to MSBC,  which shall cover the matters  contained  in
Exhibit D hereto.

         (I)  MSBC  Representations  and  Warranties.   (1)  No  matter,  event,
circumstance,  occurrence, condition, or other action or failure of action which
was  discovered  by Ballston in its due  diligence  or of which  Ballston was or
should have been notified  pursuant to Subsection  V(O) and which in either case
creates  reasonable  uncertainty  as to the  accuracy of any  representation  or
warranty of MSBC or the breach of any covenant or agreement of MSBC in this Plan
and with respect to which MSBC has been  notified in writing shall be unresolved
to the reasonable  satisfaction of Ballston; (2) Each of the representations and
warranties  contained herein of MSBC shall be true and correct as of the date of
this Plan and upon the Merger  Effective Date with the same effect as though all
such  representations and warranties had been made on the Merger Effective Date,
except for any such  representations and warranties made as of a specified date,
which  shall be true and  correct as of such  date;  and (3) each and all of the
agreements  and  covenants of MSBC to be performed and complied with pursuant to
this Plan and the  other  agreements  contemplated  hereby  prior to the  Merger
Effective  Date shall have been duly performed and complied with in all material
respects,  and Ballston shall have received a certificate or certificates signed
by the Chief  Executive  Officer and Chief  Financial  Officer of MSBC dated the
Merger Effective Date, to such effect.

         (J) Ballston  Representations  and  Warranties.  (1) No matter,  event,
circumstance,  occurrence, condition, or other action or failure of action which
was  discovered by MSBC in its due diligence or of which MSBC was or should have
been  notified  pursuant to  Subsection  V(O) and which in either  case  creates
reasonable  uncertainty as to the accuracy of any  representation or warranty of
Ballston or the breach of any covenant or agreement of Ballston in this Plan and
with respect to which  Ballston has been notified in writing shall be unresolved
to the  reasonable  satisfaction  of MSBC; (2) each of the  representations  and
warranties contained herein of Ballston shall be true and correct as of the date
of this Plan and upon the Merger  Effective  Date with the same effect as though
all such  representations  and warranties had been made on the Merger  Effective
Date, except for any such  representations and warranties made as of a specified


                                       20
<PAGE>

date,  which shall be true and correct as of such date;  and (3) each and all of
the  agreements  and  covenants  of Ballston to be performed  and complied  with
pursuant to this Plan and the other agreements  contemplated hereby prior to the
Merger  Effective  Date shall have been duly  performed and complied with in all
material  respects,  and MSBC shall have  received a  certificate  signed by the
Chief Executive  Officer and the Chief  Financial  Officer of Ballston dated the
Merger Effective Date, to such effect.

         (K) Registration  Statement  Effectiveness.  The Registration Statement
shall have become  effective and no stop order  suspending the  effectiveness of
the  Registration  Statement  shall have been issued and no proceedings for that
purpose  shall  have  been  initiated  or  threatened  by the  SEC or any  other
regulatory authority.

         (L) Blue Sky  Approvals.  MSBC  shall  have  received  all Blue Sky Law
approvals, permits and other authorizations necessary to consummate the Merger.

         (M) Tax Free  Reorganization  Opinion.  MSBC and  Ballston  shall  have
received an opinion from Flippin,  Densmore,  Morse,  Rutherford & Jessee, PC to
the effect that (1) the Merger will  constitute and qualify as a  reorganization
within the meaning of Section 368(a) of the Code and that Ballston and MSBC will
each be a party in that  reorganization  within the meaning of Section 368(b) of
the Code, and (2) no gain or loss will be recognized by stockholders of Ballston
on the exchange of Ballston  Common Stock solely for shares of MSBC Common Stock
except  that gain or loss may be  recognized  on the  receipt of cash in lieu of
fractional  share  interests of MSBC Common Stock.  In rendering  their opinion,
counsel may require and rely upon  representations  contained in certificates of
officers of MSBC, Ballston and others.

         (N)  Affiliate  Letters.  MSBC shall have received from each person who
may be deemed an  "affiliate"  of  Ballston  for  purposes of Rule 145 under the
Securities  Act an executed  letter  agreement  in the form  attached  hereto as
Exhibit B.

         (O)  Ballston  Fairness  Opinion.  At the time the Proxy  Statement  is
mailed to the holders of shares of Ballston Common Stock, the Board of Directors
of Ballston shall have received an opinion from Danielson Associates, Inc., that
the  Exchange  Ratio is fair to the  shareholders  of Ballston  from a financial
point of view.

         (P) Pooling.  MSBC and Ballston shall have received a letter,  dated as
of the Merger  Effective  Date, in form and substance  reasonably  acceptable to
MSBC,  from  Coopers & Lybrand to the effect  that the Merger  will  qualify for
pooling of interests accounting treatment.

         provided,  however, that a failure to satisfy any of the conditions set
forth in the proviso following Paragraph (C) or in Paragraph (F), (H), (J), (L),
(M), (O) or (P) of this Article VI shall only constitute  conditions if asserted
by MSBC and a failure to satisfy any of the  conditions set forth in the proviso
following  Paragraph (C), Paragraph (E), (G), (I), (M) or (O) of this Article VI
shall only constitute conditions if asserted by Ballston.

                                VII. TERMINATION.

         This Plan may be terminated prior to the Merger Effective Date,  either
before or after receipt of required stockholder approval:

         (A) Mutual Consent. By the mutual consent of MSBC and Ballston.

         (B) On Breach. By MSBC or Ballston, in the event (1) any representation
or warranty  contained herein made by the other party is breached and the breach
cannot be or has not been  cured  within  thirty  (30) days  after the giving of
written notice to the breaching  party of such breach,  or (2) a material breach


                                       21
<PAGE>

by the other party of any of the covenants or agreements contained herein, which
breach  cannot be or has not been cured within thirty (30) days after the giving
of written notice to the breaching party of such breach.

         (C) Failure to Consummate  on Time.  By MSBC or Ballston,  in the event
that the Merger is not consummated by September 30, 1998.

         (D) Failure to Obtain Certain  Approvals.  By MSBC or Ballston,  in the
event that (1) any common stockholder approval  contemplated by Paragraph (A) of
Article VI is not  obtained at a meeting or  meetings  called for the purpose of
obtaining  such  approval;  or (2) if any regulatory  approval  contemplated  by
Paragraph  (B) of Article VI to the extent  necessary to  consummate  the Merger
legally, is finally and unconditionally denied.

         (E)  Failure to  Execute  Stock  Option  Agreement.  By MSBC,  upon the
failure of Ballston to execute and deliver to MSBC the Stock  Option  Agreement,
contemporaneously with the execution of this Plan.

         (F) Possible  Adjustment in Exchange  Ratio. By Ballston during the ten
(10) day period commencing on the Determination Date (as hereinafter defined) if
both of the following conditions are satisfied:

         (1) if the Average MSBC Share Price is less than $24.47; and

         (2) if the First Percentage  exceeds the Second  Percentage by at least
ten (10) percentage points; subject,  however, to the immediately following four
sentences.  If Ballston  elects to exercise its  termination  right  pursuant to
Paragraph  (F) of Article  VII,  it shall  give  prompt  written  notice to MSBC
(provided that such notice of election to terminate may be withdrawn at any time
within the aforementioned ten (10) day period).  During the seven (7) day period
commencing  with its  receipt  of such  notice,  MSBC  shall  have the option of
increasing the  consideration  to be received by the holders of Ballston  Common
Stock by adjusting  the Exchange  Ratio,  to equal a quotient,  the numerator of
which is  $24.47  multiplied  by the  Exchange  Ratio (as then in  effect)  with
respect to Ballston  Common Stock,  and the  denominator of which is the Average
MSBC Share Price.  If MSBC makes the election  contemplated  by the  immediately
preceding  sentence,  it shall give  prompt  written  notice to Ballston of such
election, whereupon no termination shall have accrued pursuant to this Paragraph
(F) and the Plan shall remain in effect in accordance  with its terms (except as
the Exchange  Ratio shall have been so modified) and any references in this Plan
to "Exchange Ratio" shall thereafter be deemed to refer to the Exchange Ratio as
adjusted pursuant to this Paragraph (F).

         For purposes of this  Paragraph (F) the following  terms shall have the
meanings indicated:

         "Determination  Date" means the tenth  calendar day prior to the Merger
Effective Date.

         "First Percentage" means the percentage  resulting from: (a) taking the
remainder  ("First  Remainder")  obtained by subtracting  the Average MSBC Share
Price from  $27.19;  and (b)  dividing  the First  Remainder by the Average MSBC
Share Price.

         "Second Percentage" means the percentage resulting from: (a) taking the
remainder  ("Second  Remainder")  obtained by subtracting the SNL Southeast Bank
Index  reported  most  recently  prior to the last trading day in the  measuring
period for  calculating  the Average MSBC Share Price  ("Recent SNL Bank Index")
from the SNL Southeast Bank Index reported most recently prior to or on February
13, 1998; and (b) dividing the Second Remainder by the Recent SNL Bank Index.



                                       22
<PAGE>

         (G) Fiduciary Duty. By Ballston,  if its board of directors (on written
advice of counsel  that such  recommendation  is  necessary to comply with their
fiduciary  duty) shall have  determined to recommend an acquisition  proposal to
its stockholders after determining that such acquisition proposal is superior in
value to the  stockholders  to the  transaction  contemplated  by the Plan,  and
Ballston  gives MSBC at least three business days' prior notice of its intention
to effect such termination pursuant to this Paragraph.

                              VIII. OTHER MATTERS.

         (A) Survival.  If the Merger  Effective Date occurs,  the agreements of
the parties in Paragraph (F) of Article II, and  Paragraphs  (A), (D), (F), (I),
(J) and (K) of this Article VIII shall survive the Merger  Effective  Date;  all
other  representations,  warranties,  agreements and covenants contained in this
Plan shall be deemed to be  conditions  of the Merger and shall not  survive the
Merger  Effective Date. If this Plan is terminated prior to the Merger Effective
Date,  the  agreements  and  representations  of the parties in Paragraph (K) of
Article IV, Paragraphs (F)(2) of Article V and Paragraphs (A), (D), (E), (F) and
(I) of this Article VIII shall  survive  such  termination.  In the event of the
termination  and  abandonment of this Plan pursuant to the provisions of Article
VII,  this Plan shall become void and have no effect,  except (1) as provided in
the  immediately  preceding  sentence;  and (2) no party  shall be  relieved  or
released  from any liability  arising out of a breach of any  provisions of this
Plan except as provided in Paragraph (E) of this Article.

         (B)  Waiver,  Amendment.  Prior  to  the  Merger  Effective  Date,  any
provision  of  this  Plan  may  be (1)  waived  by the  party  benefited  by the
provision,  or (2) amended or modified at any time  (including  the structure of
the  transaction),  by an agreement in writing among the parties hereto approved
by or approved in the manner  authorized by their respective Boards of Directors
and executed in the same manner as this Plan, except that, after the vote by the
stockholders of Ballston,  the  consideration to be received by the stockholders
of Ballston  for each share of  Ballston  Common  Stock  shall not be  decreased
except as expressly provided herein.

         (C)   Counterparts.   This  Plan  may  be   executed  in  one  or  more
counterparts, each of which shall be deemed to constitute an original. This Plan
shall  become  effective  when one  counterpart  has been  signed by each  party
hereto.

         (D) Governing  Law. This Plan shall be governed by, and  interpreted in
accordance with, the laws of the State of Virginia.

         (E) Fees and  Expenses.  In the event  that the Plan is  terminated  in
accordance with the provisions of Article VII otherwise than pursuant to Section
VII(B) on  account  of a breach by one party (so long as the other  party is not
also in  breach),  each party  shall bear its own  costs,  expenses  and fees in
connection  with  and  arising  out of the  Merger  and the  other  transactions
contemplated  by this  Plan  (including,  without  limitation,  amounts  paid or
payable to investment bankers,  to counsel and accountants,  and to governmental
and regulatory  agencies).  In the event that the Plan is terminated pursuant to
Article VII(B), the total documented  out-of-pocket  costs,  expenses,  and fees
(excluding only investment banking fees) incurred by the other party (regardless
of whether incurred before or after the execution of this Plan), so long as such
other party shall not also be in breach,  in connection  with and arising out of
the Merger and other transactions contemplated by this Plan shall be paid by the
breaching party and the breaching  party shall promptly make such  reimbursement
to the non-breaching party as is necessary to effectuate the same.

         (F)  Confidentiality.  Except as otherwise provided in Paragraph (F)(2)
of Article V, each of the parties hereto and their respective agents,  attorneys
and accountants will maintain the confidentiality of all information provided in
connection herewith which has not been publicly disclosed.



                                       23
<PAGE>

         (G) Notices. All notices,  requests and other communications  hereunder
to a party  shall be in writing and shall be deemed to have been duly given when
delivered by hand, telegram or facsimile (confirmed in writing) to such party at
its address  set forth below or such other  address as such party may specify by
notice to the parties hereto.

                          If to MSBC, to:
                          MainStreet BankGroup Incorporated
                          200 E. Church Street
                          Martinsville, VA 24112-5409

                          Attn:   Michael Brenan,
                                  Chief Executive Officer

                          Copy to:

                          Douglas W. Densmore, Esq.
                          Flippin, Densmore, Morse, Rutherford & Jessee
                          300 First Campbell Square
                          Drawer 1200
                          Roanoke, Virginia 24006

                          If to Ballston, to:

                          Ballston Bancorp, Inc.
                          1667 K Street, N.W., Suite 700
                          Washington, D.C. 20006

                          Attn:  Robert F. Kelleher
                                 Chairman, President and Chief Executive Officer

                          Copy to:

                          Brian D. Alprin, Esq.
                          Duane, Morris & Hecksher, LLP
                          1667 Street, N.W., Suite 700
                          Washington, D.C. 20006


         (H) Definitions.  Any term defined anywhere in this Plan shall have the
meaning ascribed to it for all purposes of this Plan (unless  expressly noted to
the contrary). In addition:

                  (1)  except as  otherwise  expressly  defined  herein the term
"knowledge"  when  used  with  respect  to a party  shall  mean  (a) the  actual
knowledge or constructive  knowledge  assuming due inquiry after notice,  of any
Vice President or equivalent or superior  officer or (b) the actual knowledge or
constructive  knowledge  of any other  officer or  employee to the extent of his
actual participation in or review of such matters for purposes of this Agreement
and the consummation of the transactions contemplated hereby; or (c) information
set forth in the books and records of such party;



                                       24
<PAGE>

                  (2) the term  "Material  Adverse  Effect,"  when  applied to a
party,  shall mean an event,  occurrence,  condition or circumstance  (including
without  limitation  the making of any  provisions  for possible  loan and lease
losses or other reserves,  classification  of assets,  loan or credit  problems,
costs and expenses associated with Year 2000,  investment losses or write-downs,
legal  proceedings,  violations of law,  assertions of claims  (including claims
related to Intellectual  Property),  write-downs of other real estate and taxes)
which,  in any case, (i) has or is reasonably  likely at any future time to have
individually  or in the  aggregate a material  adverse  effect on the  financial
condition, results of operations,  assets, liquidity,  operations or business of
the party and its  Subsidiaries,  taken as a whole,  or (ii) has  impaired or is
reasonably  likely to impair  materially  the  party's  ability to  perform  its
obligations  under  this Plan or the  consummation  of the  Merger and the other
transactions  contemplated  by this Plan;  and provided  that  material  adverse
effect and material  impairment shall not be deemed to include the impact of (x)
changes in banking and similar laws of general  applicability or interpretations
thereof by courts or governmental authorities, (y) changes in generally accepted
accounting principles or regulatory accounting  requirements applicable to banks
and bank  holding  companies  generally  and (z) the  effects  of  Merger on the
operating performance of the parties to this Plan;

                  (3) the term  "Previously  Disclosed"  by a party  shall  mean
information set forth in a written disclosure that is delivered by that party to
the  other  party   contemporaneously  with  the  execution  of  this  Plan  and
specifically  designated as information  "Previously Disclosed" pursuant to this
Plan;  provided,  further,  the mere inclusion of an item in a disclosure letter
shall not be deemed an admission by a party that such item represents a material
exception of fact, event or circumstances or that such item is reasonably likely
to result in a Material Adverse Effect;

                  (4) the term  "including"  shall  mean in all cases  except as
otherwise expressly indicated "including but not limited to".

         (I) Entire Understanding. This Plan represents the entire understanding
of the parties hereto with reference to the transactions contemplated hereby and
supersede any and all other oral or written agreements  heretofore made. Nothing
in this Plan expressed or implied, is intended to confer upon any person,  other
than the parties hereto or their respective  successors,  any rights,  remedies,
obligations  or  liabilities  under or by reason  of this  Plan,  other  than as
provided in Paragraph (K) below.

         (J)  Benefit  Plans.  Upon  consummation  of the  Merger,  as  soon  as
administratively  practicable employees of Ballston and BNV shall be entitled to
participate in MSBC's pension, severance,  benefit and similar plans on the same
terms and conditions as employees of MSBC and its Subsidiaries.  With respect to
the MSBC 401(k)  plan only,  employees  of Ballston  and BNV shall be given full
credit for prior service with Ballston and BNV with respect to  eligibility  for
and vesting in such plan.  MSBC shall cause the Continuing  Corporation to honor
in  accordance  with their terms as in effect on the date hereof,  or as amended
after the date hereof with the prior written  consent of MSBC,  all  employment,
severance, consulting and other compensation contracts and agreements Previously
Disclosed  to MSBC and  executed  in writing by both  Ballston or BNV on the one
hand and any individual current or former director,  officer or employee thereof
on the other hand, copies of which have been Previously Disclosed by Ballston to
MSBC.

         (K)  Indemnification.  (1) In the case of MSBC only, it agrees that for
the  period of the  relevant  statute of  limitations  but in no event less than
six-years  following the Merger  Effective Date, it shall and it shall cause any
successor  thereto to indemnify  and hold  harmless any person who has rights to
indemnification  from Ballston and it shall cause BNV as its  Subsidiary and any
successor  there to  indemnify  and hold  harmless  any person who has rights to
indemnification  from BNV to the same extent and on the same  conditions as such
person is entitled to indemnification pursuant to Ballston's or BNV's respective
Certificate  or  Articles  of  Incorporation  and  bylaws  or  applicable  board


                                       25
<PAGE>

resolutions  as in effect on the date of this Plan as Previously  Disclosed,  to
the extent legally  permitted to do so, with respect to matters  occurring on or
prior to the Merger Effective Date (regardless of whether a claim is asserted in
connection  therewith on or prior to the Merger  Effective Date or  thereafter).
Without  limiting the  foregoing,  in any case in which  approval by MSBG or its
Subsidiary  may be required to effectuate any such  indemnification,  MSBC shall
cause the Continuing  Corporation or, if applicable,  such Subsidiary to direct,
at the election of the party to be indemnified,  that the  determination  of any
such approval shall be made by independent  counsel mutually agreed upon between
MSBC and the  indemnified  party.  MSBC shall use its reasonable best efforts to
provide  coverage to the officers and  directors of MSBC and BNV,  respectively,
under MSBC policy or policies of director  and officers  liability  insurance on
the same or  substantially  similar  terms then in effect for the  directors and
officers of MSBC and the  Continuing  Corporation  shall  reimburse MSBC for the
additional  premium  incurred by it in connection  with providing such coverage;
(2) If MSBC or any of its successors or assigns shall  consolidate with or merge
into any other entity and shall not be the  continuing  or  surviving  entity of
such  consolidation or merger or shall transfer all or substantially  all of its
assets to any entity,  then and in each case, proper provisions shall be made so
that the successors and assigns of MSBC shall assume the  obligations  set forth
in this  Paragraph  (K)(1).  MSBC  shall  pay all  reasonable  costs,  including
attorneys' fees, that may be incurred by any Indemnified  Party in enforcing the
indemnity and other  obligations  provided for in this  Paragraph  (K)(1).  MSBC
shall have no obligation to maintain directors and officers liability  insurance
under this Section if MSBC  determines in good faith that (a) such  insurance is
not  reasonably  available;  or (b) the  premium  costs  for such  insurance  is
disproportionate to the amount of coverage provided, (c) the incremental premium
costs for such  coverage  exceed 175% of the amount per annum  Ballston  and BNV
paid in its  last  full  fiscal  year,  or (d)  the  coverage  provided  by such
insurance is limited by exclusives so as to provide an insufficient  benefit (it
being  understood that if such exclusives are not materially  greater than those
in effect for MSBC as of December 31, 1997, this clause (d) cannot be invoked).

         (L)  Acquisition of MSBC. In the event that MSBC is acquired  through a
merger,  share  exchange or other  business  combination  in which it is not the
surviving entity, MSBC agrees that it shall make provision by which the acquirer
shall assume this  Agreement and the holders of Ballston  Common Shares shall be
entitled  to receive  the same  consideration  for such shares as the holders of
MainStreet Common Stock received, giving effect to the Exchange.

         (M)  Alternative  Structure.  Notwithstanding  anything to the contrary
contained in this Plan,  subject to the final sentence of this Section (M), MSBC
may,  at its  sole  option,  elect to  either  (a)  form a  separate  subsidiary
corporation  and merge it into Ballston or Ballston into it such that MSBC shall
be the sole shareholder of the surviving  corporation,  or (b) convert this Plan
to an exchange  of Ballston  Common  Stock for MSBC Common  Stock,  instead of a
merger,  on the same terms and  conditions  contained  herein  (except  for such
conversion);  provided,  however,  that MSBC may not make such an election if it
would result in failure to satisfy the condition set forth in either Section (M)
or (P) of Article VI. In the event MSBC makes an election  pursuant to the prior
sentence,   Ballston  shall  take  all  actions  reasonably  requested  by  MSBC
(including  without  limitation  using its best efforts to obtain any  requisite
corporate and stockholder approvals in connection therewith).  In the event that
MSBC makes an election  pursuant to the first  sentence of this Section (M), the
parties  hereto agree  promptly to amend this Plan as MSBC may  reasonably  deem
necessary or appropriate.  If MSBC reasonably  determines that the Merger cannot
be effected  pursuant to this Plan (other than pursuant to this Section (M)) and
MSBC also reasonably determines that the transactions  contemplated by this Plan
can be effected if one or more of the actions  contemplated  by this Section (M)
are taken, then MSBC shall elect to take one or more of the actions contemplated
by this Section (M); provided,  however, that MSBC shall not be required to take
any such action if the taking of such action is, in MSBC's reasonable  judgment,
reasonably likely to result in the failure of any of the conditions set forth in
Article VI.

                                       26
<PAGE>

         IN WITNESS  WHEREOF,  the parties hereto have caused this instrument to
be executed in counterparts by their duly authorized officers, all as of the day
and year first above written.

                             MainStreet BankGroup Incorporated


                             By: /s/ Michael Brenan
                                     Michael Brenan
                                     Chief Executive Officer


                             Ballston Bancorp, Inc.


                             By: /s/ Robert F. Kelleher
                                     Robert F. Kelleher
                                     Chairman, President and Chief
                                       Executive Officer









                                       27
<PAGE>

                                   APPENDIX II

                                 March 11, 1998

Board of Directors
Ballston Bancorp Inc.
1110 N. Glebe Road, Suite 1080
Arlington, Virginia  22201

Dear Board Members:

         Set  forth  herein  is  the  opinion  of  Danielson   Associates   Inc.
("Danielson  Associates")  as to the  "fairness"  of  the  offer  by  MainStreet
BankGroup,   Inc.   ("MainStreet"),   a  bank  holding   company   domiciled  in
Martinsville,  Virginia  to acquire  all of the  shares of the  common  stock of
Ballston Bancorp,  Inc. ("Ballston" or the "Bank") of Arlington,  Virginia.  The
"fair"  value is defined  as the price at which all of the shares of  Ballston's
common  stock would change hands  between a willing  seller and a willing  buyer
with each having had a reasonable knowledge of the relevant facts. In opining as
to the  "fairness" of the offer,  it also must be  determined if the  MainStreet
common stock to be exchanged for Ballston's common stock is "fairly" valued.

         In preparing  this opinion,  the Bank's market has been  analyzed;  its
business and prospects have been reviewed; and its performance has been compared
with banks in similar markets. In addition, any unique characteristics have been
considered.

         This opinion is based partly on data  supplied to Danielson  Associates
by Ballston, and it relies on some public information,  all of which is believed
to be reliable,  but neither the  completeness  nor accuracy of such information
can be  guaranteed.  In  particular,  the  opinion  assumes  that  there  are no
significant  asset quality  problems  beyond what is stated in recent reports to
regulatory agencies.

         In determining the "fair" sale value of Ballston, the emphasis has been
placed on prices paid for banks with similar  financial,  structural  and market
characteristics.  These prices were related to Ballston's  net income,  which is
the most important factor in determining its "fair" sale value.

         The "fair" market value of the MainStreet  common stock to be exchanged
for Ballston stock has been  determined by a comparison  with other similar bank
and bank  holding  company  stocks and included no  in-person  due  diligence of
MainStreet. This comparison showed the MainStreet stock to be "fairly" valued.

         Based on this  analysis,  the "fair" sale value of Ballston is $15.7 to
$16.7 million,  or $9.20 to $10.19 per share. Thus,  MainStreet's offer of $19.5
million,  or $12.04 per share,  is a "fair" offer from a financial point of view
for Ballston and its shareholders.

                                    Respectfully submitted,

                                    /s/ Arnold G. Danielson
                                    Arnold G. Danielson
                                    Chairman
                                    Danielson Associates Inc.


                                       1
<PAGE>

                                  APPENDIX III

               SECTION 262 OF THE DELAWARE GENERAL CORPORATION LAW

Section 262.  Appraisal rights

         (a) Any  stockholder of a corporation of this State who holds shares of
stock on the date of the making of a demand  pursuant to subsection  (d) of this
section with respect to such shares,  who continuously holds such shares through
the effective date of the merger or  consolidation,  who has otherwise  complied
with  subsection  (d) of this section and who has neither  voted in favor of the
merger or consolidation  nor consented thereto in writing pursuant to ss. 228 of
this title  shall be entitled  to an  appraisal  by the Court of Chancery of the
fair  value  of the  stockholder's  shares  of  stock  under  the  circumstances
described in subsections  (b) and (c) of this section.  As used in this section,
the word "stockholder"  means a holder of record of stock in a stock corporation
and also a member of record of a nonstock  corporation;  the words  "stock"  and
"share"  mean and  include  what is  ordinarily  meant by those  words  and also
membership or membership interest of a member of a nonstock corporation; and the
words  "depository  receipt"  mean a  receipt  or other  instrument  issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.

         (b) Appraisal  rights shall be available for the shares of any class or
series of stock of a constituent  corporation in a merger or consolidation to be
effected  pursuant  to ss. 251 (other  than a merger  effected  pursuant  to ss.
251(g) of this title), ss. 252, ss. 254, ss. 257, ss. 258, ss. 263 or ss. 264 of
this title:

         (1)  Provided,  however,  that no  appraisal  rights under this section
shall be available for the shares of any class or series of stock,  which stock,
or depository receipts in respect thereof, at the record date fixed to determine
the  Stockholders  entitled  to receive  notice of and to vote at the meeting of
Stockholders to act upon the agreement of merger or  consolidation,  were either
(i) listed on a national  securities exchange or designated as a national market
system security on an interdealer  quotation system by the National  Association
of Securities  Dealers,  Inc. or (ii) held of record by more than 2,000 holders;
and further  provided that no appraisal rights shall be available for any shares
of stock of the constituent corporation surviving a merger if the merger did not
require  for  its  approval  the  vote  of the  Stockholders  of  the  surviving
corporation as provided in subsection (f) of ss. 251 of this title.

         (2) Notwithstanding paragraph (1) of this subsection,  appraisal rights
under this section  shall be available  for the shares of any class or series of
stock of a constituent  corporation  if the holders  thereof are required by the
terms of an agreement of merger or  consolidation  pursuant to ss.ss.  251, 252,
254,  257,  258,  263 and 264 of this title to accept  for such  stock  anything
except:

         a. Shares of stock of the corporation  surviving or resulting from such
merger or consolidation, or depository receipts in respect thereof;

         b. Shares of stock of any other corporation,  or depository receipts in
respect thereof,  which shares of stock or depository  receipts at the effective
date  of the  merger  or  consolidation  will be  either  listed  on a  national
securities  exchange or  designated as a national  market system  security on an
interdealer  quotation system by the National Association of Securities Dealers,
Inc. or held of record by more than 2,000 holders;

         c. Cash in lieu of fractional shares or fractional  depository receipts
described in the foregoing subparagraphs a. and b. of this paragraph; or



                                       1
<PAGE>

         d. Any combination of the shares of stock, depository receipts and cash
in lieu of fractional shares or fractional  depository receipts described in the
foregoing subparagraphs a., b. and c. of this paragraph.

         (3) In the event all of the stock of a subsidiary Delaware  corporation
party to a merger  effected  under  ss.  253 of this  title is not  owned by the
parent  corporation  immediately prior to the merger,  appraisal rights shall be
available for the shares of the subsidiary Delaware corporation.

         (c) Any  corporation  may provide in its  certificate of  incorporation
that  appraisal  rights under this section  shall be available for the shares of
any class or series of its stock as a result of an amendment to its  certificate
of  incorporation,  any merger or  consolidation  in which the  corporation is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation.  If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.

         (d) Appraisal rights shall be perfected as follows:

         (1) If a proposed merger or  consolidation  for which appraisal  rights
are provided  under this section is to be submitted for approval at a meeting of
Stockholders, the corporation, not less than 20 days prior to the meeting, shall
notify each of its Stockholders who was such on the record date for such meeting
with  respect to shares for which  appraisal  rights are  available  pursuant to
subsection (b) or (c) hereof that appraisal  rights are available for any or all
of the shares of the constituent corporations,  and shall include in such notice
a copy of this section. Each stockholder electing to demand the appraisal of his
shares shall  deliver to the  corporation,  before the taking of the vote on the
merger or  consolidation,  a written  demand for  appraisal of his shares.  Such
demand  will be  sufficient  if it  reasonably  informs the  corporation  of the
identity of the stockholder  and that the stockholder  intends thereby to demand
the appraisal of his shares. A proxy or vote against the merger or consolidation
shall not constitute such a demand.  A stockholder  electing to take such action
must do so by a separate written demand as herein provided. Within 10 days after
the effective date of such merger or  consolidation,  the surviving or resulting
corporation  shall notify each stockholder of each  constituent  corporation who
has complied with this  subsection and has not voted in favor of or consented to
the merger or  consolidation  of the date that the merger or  consolidation  has
become effective; or

         (2) If the merger or consolidation  was approved pursuant to ss. 228 or
ss. 253 of this title, each constituent corporation, either before the effective
date of the merger or consolidation or within ten days thereafter,  shall notify
each of the  holders  of any  class  or  series  of  stock  of such  constituent
corporation  who are entitled to appraisal  rights of the approval of the merger
or  consolidation  and that appraisal rights are available for any or all shares
of such  class or series  of stock of such  constituent  corporation,  and shall
include in such notice a copy of this section;  provided  that, if the notice is
given on or after the effective date of the merger or consolidation, such notice
shall be given by the surviving or resulting  corporation to all such holders of
any class or series of stock of a constituent  corporation  that are entitled to
appraisal rights.  Such notice may, and, if given on or after the effective date
of the merger or  consolidation,  shall,  also notify such  Stockholders  of the
effective  date of the merger or  consolidation.  Any  stockholder  entitled  to
appraisal  rights may,  within 20 days after the date of mailing of such notice,
demand in writing from the surviving or resulting  corporation  the appraisal of
such holder's  shares.  Such demand will be sufficient if it reasonably  informs
the  corporation  of the identity of the  stockholder  and that the  stockholder
intends thereby to demand the appraisal of such holder's shares.  If such notice
did  not  notify   Stockholders   of  the  effective   date  of  the  merger  or
consolidation,  either (i) each such constituent corporation shall send a second


                                       2
<PAGE>

notice before the effective date of the merger or  consolidation  notifying each
of the holders of any class or series of stock of such  constituent  corporation
that are entitled to  appraisal  rights of the  effective  date of the merger or
consolidation or (ii) the surviving or resulting  corporation  shall send such a
second  notice to all such  holders on or within 10 days  after  such  effective
date;  provided,  however,  that if such second notice is sent more than 20 days
following the sending of the first notice,  such second notice need only be sent
to each  stockholder  who is entitled to  appraisal  rights and who has demanded
appraisal  of such  holder's  shares  in  accordance  with this  subsection.  An
affidavit of the  secretary or assistant  secretary or of the transfer  agent of
the corporation that is required to give either notice that such notice has been
given  shall,  in the  absence of fraud,  be prima  facie  evidence of the facts
stated therein. For purposes of determining the Stockholders entitled to receive
either notice,  each constituent  corporation may fix, in advance, a record date
that  shall be not more  than 10 days  prior to the date the  notice  is  given,
provided,  that if the  notice  is given on or after the  effective  date of the
merger or  consolidation,  the record date shall be such  effective  date. If no
record date is fixed and the notice is given prior to the  effective  date,  the
record date shall be the close of business on the day next  preceding the day on
which the notice is given.

         (e)  Within  120  days  after  the  effective  date  of the  merger  or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with  subsections  (a) and (d) hereof and who is otherwise  entitled to
appraisal  rights,  may file a petition  in the Court of  Chancery  demanding  a
determination   of  the   value  of  the   stock   of  all  such   Stockholders.
Notwithstanding  the  foregoing,  at any time within 60 days after the effective
date of the merger or  consolidation,  any  stockholder  shall have the right to
withdraw  his demand for  appraisal  and to accept  the terms  offered  upon the
merger or consolidation.  Within 120 days after the effective date of the merger
or  consolidation,  any  stockholder  who has complied with the  requirements of
subsections  (a) and (d)  hereof,  upon  written  request,  shall be entitled to
receive  from  the  corporation  surviving  the  merger  or  resulting  from the
consolidation a statement setting forth the aggregate number of shares not voted
in favor of the merger or  consolidation  and with respect to which  demands for
appraisal have been received and the aggregate number of holders of such shares.
Such written  statement shall be mailed to the stockholder  within 10 days after
his  written  request  for such a statement  is  received  by the  surviving  or
resulting  corporation  or within 10 days  after  expiration  of the  period for
delivery of demands for  appraisal  under  subsection  (d) hereof,  whichever is
later.

         (f) Upon the filing of any such petition by a stockholder, service of a
copy thereof  shall be made upon the surviving or resulting  corporation,  which
shall  within 20 days after such  service  file in the office of the Register in
Chancery in which the petition was filed a duly  verified  list  containing  the
names and  addresses of all  Stockholders  who have  demanded  payment for their
shares and with whom  agreements  as to the value of their  shares have not been
reached by the  surviving or  resulting  corporation.  If the petition  shall be
filed  by  the  surviving  or  resulting  corporation,  the  petition  shall  be
accompanied  by such a duly  verified  list.  The  Register in  Chancery,  if so
ordered by the  Court,  shall  give  notice of the time and place  fixed for the
hearing of such  petition by  registered  or certified  mail to the surviving or
resulting corporation and to the Stockholders shown on the list at the addresses
therein  stated.  Such notice shall also be given by 1 or more  publications  at
least  1  week  before  the  day of  the  hearing,  in a  newspaper  of  general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems  advisable.  The forms of the notices by mail and by publication
shall be  approved  by the Court,  and the costs  thereof  shall be borne by the
surviving or resulting corporation.

         (g) At the  hearing on such  petition,  the Court shall  determine  the
Stockholders who have complied with this section and who have become entitled to
appraisal  rights.  The Court may require the  Stockholders who have demanded an
appraisal for their shares and who hold stock  represented  by  certificates  to
submit  their  certificates  of stock to the  Register in Chancery  for notation
thereon of the pendency of the  appraisal  proceedings;  and if any  stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.



                                       3
<PAGE>

         (h) After  determining the Stockholders  entitled to an appraisal,  the
Court shall appraise the shares,  determining  their fair value exclusive of any
element of value arising from the accomplishment or expectation of the merger or
consolidation,  together  with a fair rate of interest,  if any, to be paid upon
the amount  determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors,  including the rate of
interest which the surviving or resulting  corporation  would have had to pay to
borrow money  during the pendency of the  proceeding.  Upon  application  by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion,  permit discovery
or other pretrial  proceedings and may proceed to trial upon the appraisal prior
to the final  determination  of the  stockholder  entitled to an appraisal.  Any
stockholder  whose name appears on the list filed by the  surviving or resulting
corporation pursuant to subsection (f) of this section and who has submitted his
certificates  of stock to the  Register in Chancery,  if such is  required,  may
participate fully in all proceedings  until it is finally  determined that he is
not entitled to appraisal rights under this section.

         (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
Stockholders entitled thereto.  Interest may be simple or compound, as the Court
may direct.  Payment shall be so made to each such  stockholder,  in the case of
holders of  uncertificated  stock  forthwith,  and the case of holders of shares
represented  by  certificates  upon  the  surrender  to the  corporation  of the
certificates  representing  such stock.  The  Court's  decree may be enforced as
other decrees in the Court of Chancery may be enforced,  whether such  surviving
or resulting corporation be a corporation of this State or of any state.

         (j) The  costs of the  proceeding  may be  determined  by the Court and
taxed upon the parties as the Court deems equitable in the  circumstances.  Upon
application  of a  stockholder,  the Court  may  order  all or a portion  of the
expenses   incurred  by  any   stockholder  in  connection  with  the  appraisal
proceeding,  including,  without limitation,  reasonable attorney's fees and the
fees and  expenses of experts,  to be charged pro rata  against the value of all
the shares entitled to an appraisal.

         (k) From and after the effective  date of the merger or  consolidation,
no stockholder  who has demanded his appraisal  rights as provided in subsection
(d) of this  section  shall be entitled to vote such stock for any purpose or to
receive  payment  of  dividends  or other  distributions  on the  stock  (except
dividends or other  distributions  payable to  Stockholders  of record at a date
which is prior to the effective date of the merger or consolidation);  provided,
however,  that if no petition  for an  appraisal  shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to the surviving or resulting corporation a written withdrawal of his demand for
an appraisal and an acceptance of the merger or consolidation,  either within 60
days after the  effective  date of the merger or  consolidation  as  provided in
subsection  (e) of this section or thereafter  with the written  approval of the
corporation,  then the right of such  stockholder  to an appraisal  shall cease.
Notwithstanding the foregoing,  no appraisal proceeding in the Court of Chancery
shall be dismissed as to any stockholder  without the approval of the Court, and
such approval may be conditioned upon such terms as the Court deems just.

         (l) The shares of the surviving or resulting  corporation  to which the
shares  of such  objecting  Stockholders  would  have  been  converted  had they
assented to the merger or consolidation  shall have the status of authorized and
unissued shares of the surviving or resulting corporation.


                                       4
<PAGE>
                                   APPENDIX IV



                             BALLSTON BANCORP, INC.


                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS


                                     GENERAL

Ballston does not engage in any  substantial  business  activity other than as a
bank holding  company that owns all of the issued and  outstanding  stock of The
Bank, its principal asset.  Unless  otherwise  noted,  the following  discussion
relates to Ballston and The Bank on a consolidated basis,  collectively referred
to as Ballston.  Ballston engages in community  banking  activities by accepting
deposits  and  investing  such  funds  primarily  in a variety  of loans.  These
community banking activities  primarily include providing commercial loans, real
estate mortgage loans, real estate  construction  loans and, to a lesser extent,
consumer  loans.  Ballston also  maintains an investment  securities  portfolio.
Ballston's lending and investing activities are funded primarily by deposits.

The  largest  component  of  Ballston's  net  income  is  net  interest  income.
Consequently,  Ballston's  earnings are primarily  dependent on its net interest
income,  which is  determined  by (i) the  difference  between rates of interest
earned on interest-earning assets and rates paid on interest-bearing liabilities
(interest rate spread), and (ii) the relative amounts of interest-earning assets
and interest-bearing liabilities.  Ballston's net income is also affected by its
provision for loan losses, other income, other expenses, and income taxes.

                                    OVERVIEW

On June 23, 1997, Ballston signed a definitive  agreement to merge with and into
a subsidiary of Abigail Adams National Bancorp,  Inc.  ("AANB").  Because of the
pendency of that merger,  Ballston's strategy to expand its operations,  through
the active pursuit of investments in securities, loan originations,  and deposit
growth,  was not  pursued as actively  as in prior  periods.  The merger was not
approved at the Special Meeting of Shareholders of AANB on December 31, 1997 and
as a result, the definitive  agreement between Ballston and AANB was terminated.
The 1997 pre-tax  earnings  were reduced by $263,000 as a result of the expenses
related to that merger.

On March 11, 1998, Ballston signed a definitive agreement to merge with and into
MSBC. It is anticipated  that the transaction will close no later than the third
quarter of 1998 and such  transaction  is  expected to be  accounted  for by the
pooling-of-interests method of accounting.

In April 1998, a new branch office (the "new branch") was opened in Falls
Church, Virginia. Ballston believes, although there is no assurance, that the
new branch

                                       1
<PAGE>

will  result in the growth of its loan  portfolio  and  deposit  base.  Ballston
expects its other expenses may increase in 1998 due to the costs associated with
the opening of the new branch.

             COMPARISON OF DECEMBER 31, 1997 WITH DECEMBER 31, 1996

FINANCIAL CONDITION

Total assets  increased  $1,756,000 or 2.2%, to $80,336,000 at December 31, 1997
from  $78,580,000 at December 31, 1996. The increase was primarily  attributable
to a  $13,182,000  or 224.5%  increase in cash and cash  equivalents,  which was
partially  offset by decreases in investment  securities of $7,689,000 or 32.3%,
interest  bearing  deposits with financial  institutions of $1,775,000 or 41.6%,
loans of  $1,446,000  or  3.4%,  and  foreclosed  real  estate  held for sale of
$514,000 or 45.7%. Total liabilities increased $1,094,000 or 1.5% to $72,073,000
at December 31, 1997 from  $70,979,000  at December 31, 1996.  This increase was
primarily  due to increases in deposits of $1,621,000  or 2.6%,  and  securities
sold under  repurchase  agreements  of  $279,000 or 5.0%,  which were  partially
offset by a decrease  in  advances  from  Federal  Home Loan Bank of $850,000 or
55.5%.

Nonperforming  Assets.  The  following  table sets forth  information  regarding
nonperforming  assets  as  of  the  dates  indicated.   Ballston  had  no  loans
categorized as troubled debt restructurings.

                                                December 31,       December 31,
                                                     1997              1996
                                                ------------       ------------
                                                         (In Thousands)

Loans accounted for on a nonaccrual basis          $   211            $     15
Accruing loans that are contractually past
      due 90 days or more                              198                 179
                                                  --------            --------
              Total                                    409                 194
Foreclosed real estate held for sale                   610               1,124
                                                  --------             -------
                  Total nonperforming assets        $1,019              $1,318
                                                    ======              ======

Foreclosed  Real  Estate Held for Sale.  Real  estate  acquired by Ballston as a
result of  foreclosure  is classified  as  foreclosed  real estate held for sale
("Foreclosed  Real Estate")  until such time it is sold.  When  Foreclosed  Real
Estate is acquired,  it is recorded at the lower of its fair value or the unpaid
principal balance of the related loan.

Allowance for Losses on Loans and  Foreclosed  Real Estate.  It is the policy of
management  to provide  for losses on  unidentified  loans in its  portfolio  in
addition  to  classified  loans.  A  provision  for loan  losses is  charged  to
operations based on management's  evaluation of the potential losses that may be
incurred in Ballston's loan portfolio.  Management  also  periodically  performs
valuations of Foreclosed Real Estate and establishes an allowance to reduce book
values of the properties to their net realizable  values when  necessary.  As of
December 31, 1997 and 1996, there was no allowance for losses on Foreclosed Real
Estate.  The following table sets forth  information  with respect to Ballston's
allowance for loan losses for the years indicated.


                                       2
<PAGE>
<TABLE>
<CAPTION>
<S> <C>
                                                               Year Ended December 31,
                                                               ------------------------
                                                               1997                1996
                                                               ----                ----
                                                                (Dollars In Thousands)

     Allowance for loan losses, beginning of year              $613                $652
                                                               ----                ----
     Provision for loan losses                                   18                  12
                                                               ----                ----
     Chargeoffs:
         Commercial                                              19                   -
         Real estate - mortgage                                   -                  52
         Consumer                                                11                   2
                                                               ----                ----
                  Total chargeoffs                               30                  54
                                                               ----                ----
     Recoveries:
         Commercial                                               1                   1
         Consumer                                                 -                   2
                                                               ----                ----
                   Total recoveries                               1                   3
                                                               ----                ----
     Net chargeoffs                                              29                  51
                                                               ----                ----
     Allowance for loan losses, end of year                    $602                $613
                                                               ====                ====

     Net loans charged off as a percent of average
             loans outstanding                                 0.07%               0.13%
                                                               ====                ====

The following  table sets forth the allocation of Ballston's  allowance for loan
losses by loan category and the percent of loans in each category to total loans
receivable  at the dates  indicated.  The  portion  of the loan  loss  allowance
allocated to each loan  category  does not  represent  the total  available  for
future losses that may occur within the loan category  since the total loan loss
allowance is a valuation applicable to the entire loan portfolio.
<CAPTION>
                                                   December 31,              December 31,
                                                      1997                       1996
                                                   ------------              ------------
                                                             (Dollars In Thousands)

                                                Amount       Percent     Amount        Percent
                                                ------       -------     ------        -------
     Balance at end of year applicable to:
         Commercial                              $113          18.8%      $163           28.4%
         Real estate - construction                17           2.8         66           10.7
         Real estate - mortgage                   460          76.4        368           58.4
         Consumer                                  12           2.0         16            2.5
                                                 ----          ----       ----           ---- 
     Total                                       $602         100.0%      $613          100.0%
                                                 ====         =====       ====          =====
</TABLE>

                                       3
<PAGE>

RESULTS OF OPERATIONS

Net income for 1997 was $771,000 or $.48 per share in  comparison to $741,000 or
$.46 per share for 1996.  As discussed in the Overview  section,  net income for
1997 was  negatively  impacted as a result of $263,000 of pre-tax merger related
expenses  in regard  to the AANB  proposed  merger  transaction.  Without  these
special merger related expenses,  net income after taxes would have approximated
$944,000.

Net Interest  Income.  Ballston's net interest  income was  relatively  flat for
1997.  Net interest  income  increased  $129,000 or 4.0%, to $3,384,000 for 1997
from  $3,255,000 for 1996. The increase was primarily the result of a $2,448,000
or 16.2%  increase  in the  relative  amount  of  interest-earning  assets  over
interest-bearing  liabilities  during 1997 versus 1996, which more than offset a
22 basis  point net  decrease to 3.75% in the yield on  interest-earning  assets
over the rate paid on interest-bearing liabilities.

Provision for Loan Losses.  The provision  for loan losses  increased  $5,900 or
49.2%, to $17,900 for 1997 from $12,000 for 1996.  Management regularly performs
an analysis to identify the inherent  risk of loss in its loan  portfolio.  This
analysis  includes  evaluation  of the  collectibility  of the  loan  portfolio,
including  the  nature  of  the  portfolio,  credit  concentrations,  trends  in
historical loss experience,  specific  impaired loans, and economic  conditions.
Management  will  continue to monitor its  allowance  for loan losses and future
adjustments  to the allowance  through the provision for loan losses as economic
conditions  dictate.  Although the  allowance for loan losses is maintained at a
level that  management  considers to be adequate to provide for the risk of loss
in Ballston's loan portfolio,  there can be no assurance that future losses will
not exceed estimated amounts or that additional  provisions for loan losses will
not be required in future periods.

Other Income.  Other income  increased  $234,000 or 64.0% for 1997 from $365,000
for 1996.  The  majority of the increase  was the result of the  recognition  of
$191,000 in gain on sale of foreclosed  real estate.  In addition,  other income
exclusive of service charges on deposit  accounts and gain on sale of foreclosed
real estate  increased  $71,000 or 42.9%, to $236,000 for 1997 from $165,000 for
1996.  This increase was primarily a result of Ballston  instituting a policy to
charge non-bank  customers,  on a per transaction  basis, a fee for their use of
Ballston's ATM machines.  Service charges on deposit accounts  decreased $28,000
or 14.0% to  $172,000  for 1997  from  $200,000  for  1996.  Such  decrease  was
primarily the result of a decrease in  non-sufficient  fund fees.  This decrease
was not the result of Ballston's  change in  collection  policy on such fees but
rather the result of fewer customer accounts requiring such charges.

Other Expenses.  Other expenses  increased  $302,000 or 12.2%, to $2,776,000 for
1997 from $2,475,000 for 1996. The increase was primarily  attributable to other
operating  expenses  increasing  $300,000 or 34.9% to  $1,161,000  for 1997 from
$861,000 for 1996. This increase was primarily due to $263,000 of merger related
expenses in connection  with the AANB  proposed  merger  transaction.  Occupancy
expense increased $42,000 or 19.7%, to $254,000 for 1997 from $212,000 for 1996.
As discussed in the Overview  Section,  Ballston  opened a new branch  office in
Falls Church,  Virginia in April 1998. Beginning in May 1997, Ballston commenced
paying rent of  approximately  $4,200 a month on this new site,  which accounted
for most of the increase.  Salaries and employee  benefits  decreased $47,000 or
3.9%,  to  $1,169,000  for 1997 from  $1,216,000  for  1996.  The  decrease  was
primarily  the  result of the  departure  of two  executive  officers  and three
employees in the second and third quarters of 1997.


                                       4
<PAGE>

               COMPARISON OF MARCH 31, 1998 WITH DECEMBER 31, 1997

FINANCIAL CONDITION

Total assets decreased $4,661,000 or 5.8%, to $75,675,000 at March 31, 1998 from
$80,336,000  at December 31, 1997.  The decrease was primarily  attributable  to
decreases of  $7,734,000 or 40.6% in cash and cash  equivalents  and $804,000 or
2.0% in loans,  which were  partially  offset by increases  in interest  bearing
deposits  with  financial  institutions  of  $389,000  or 15.6%  and  investment
securities of $3,512,000 or 21.8%.  Total  liabilities  decreased  $4,713,000 or
6.5% to  $67,360,000  at March 31, 1998 from  $72,073,000  at December 31, 1997.
This  decrease  was  primarily  due to a decrease in deposits of  $6,604,000  or
10.2%,  which was  partially  offset by an  increase  in  securities  sold under
repurchase agreements of $1,773,000 or 30.1%.

Nonperforming  Assets. As of March 31, 1998, loans accounted for on a nonaccrual
basis totaled  $207,000 versus $211,000 as of December 31, 1997. As of March 31,
1998,  accruing  loans that are  contractually  past due 90 days or more totaled
$95,000  versus  $198,000  as of  December  31,  1997.  Ballston  had  no  loans
categorized as troubled debt restructurings as of March 31, 1998.

               COMPARISON OF THE THREE MONTHS ENDED MARCH 31, 1998
                   WITH THE THREE MONTHS ENDED MARCH 31, 1997

RESULTS OF OPERATIONS

Net income for the three  months  ended March 31, 1998 was  $105,000 or $.06 per
share in  comparison  to $164,000 or $.10 per share for the three  months  ended
March 31,  1997.  Net  income  for the three  months  ended  March 31,  1998 was
negatively  impacted as a result of $163,000 of pre-tax merger related expenses.
Without these special merger related expenses, net income after taxes would have
approximated $251,000.

Net Interest Income.  Ballston's net interest income was relatively flat for the
three  months  ended March 31, 1998 as compared to the three  months ended March
31, 1997.  Net interest  income  increased  $20,000 or 2.3%, to $847,000 for the
three months ended March 31, 1998 from $827,000 for the three months ended March
31,  1997.  The  increase  was  primarily  the result of a  $2,463,000  or 17.0%
increase in the relative amount of interest-earning assets over interest-bearing
liabilities during the three months ended March 31, 1998 versus the three months
ended March 31,  1997,  which more than offset a 26 basis point net  decrease to
3.69%  in  the  yield  on   interest-earning   assets  over  the  rate  paid  on
interest-bearing liabilities.

Provision for Loan Losses.  The provision for loan losses remained  constant for
the three months  ended March 31,  1998,  as compared to the same period for the
prior year. The allowance for loan losses totaled $617,000 at March 31, 1998.

Other Income. Other income decreased $22,000 or 19.1% for the three months ended
March 31, 1998 from $117,000 for the three months ended March 31, 1997.



                                       5
<PAGE>

Other Expenses.  Other expenses  increased  $28,000 or 4.2% for the three months
ended March 31, 1998 from  $675,000  for the three  months ended March 31, 1997.
The increase was primarily  attributable  to merger expenses of $163,000 for the
three months ended March 31, 1998,  which was partially  offset by a decrease in
salaries and  employee  benefits of $123,000 or 37.2% for the three months ended
March 31, 1998 from  $330,000 for the three  months  ended March 31,  1997.  The
decrease in salaries  and  employee  benefits  was  primarily  the result of the
departure of two executive  officers and three employees in the second and third
quarters of fiscal 1997.

                                 YEAR 2000 ISSUE

A great deal of  information  has been  disseminated  about the global  computer
crash  that may occur in the year 2000.  Many  computer  programs  that can only
distinguish  the final  two  digits of the year  entered  (a common  programming
practice)  are  expected to read  entries for the year 2000 as the year 1900 and
compute  payment,  interest  or  delinquency  based on the  wrong  date,  or are
expected to be unable to compute  payment,  interest or  delinquency.  Rapid and
accurate  data  processing  is essential  to the  operations  of Ballston.  Data
processing is also essential to most other financial institutions and many other
companies.  All of the  significant  data  processing  of Ballston that could be
affected  by this  problem is  provided by a third  party  service  bureau.  The
service  bureau has advised  Ballston that it expects to resolve this  potential
problem  before  the year  2000.  However,  if the  service  bureau is unable to
resolve  this  potential  problem  in time,  Ballston  would  likely  experience
significant data processing delays, mistakes or failures. These delays, mistakes
or failures could have a significant  adverse impact on the financial  condition
and results of operations of Ballston. It is currently anticipated that costs to
Ballston associated with the year 2000 issue will not be significant.

                         LIQUIDITY AND CAPITAL RESOURCES

The  primary   sources  of  funds  are   deposits,   repayments   of  loans  and
mortgage-backed   securities,    maturities   of   investment   securities   and
interest-bearing   deposits  with  financial  institutions,   cash  provided  by
operations  and advances  from FHLB.  While  scheduled  repayments  of loans and
mortgage-backed   securities,   and  maturities  of  investment  securities  and
interest-bearing deposits with financial institutions are predictable sources of
funds,  deposit flows and loan prepayments are greatly influenced by the general
level of interest rates, economic conditions and competition.  Ballston uses its
cash  flows to fund  existing  and future  loan  commitments,  to fund  maturing
certificates  of deposit  and  demand  deposit  withdrawals,  to invest in other
interest-earning assets, to maintain liquidity and to meet operating expenses.

At  March  31,  1998  and  December  31,  1997,  Ballston  had  $10,936,000  and
$10,452,000,   respectively,   in  approved  loan  commitments,   for  which  it
anticipates  that it will have the funds  necessary  to meet  these  obligations
through the sources of funds  mentioned  above.  The amount of time  deposits at
March 31, 1998 which is  scheduled  to mature  during the twelve  months  ending
March 31, 1999 is $20,705,000.  The amount of time deposits at December 31, 1997
which is scheduled to mature in 1998 is $21,310,000. Management believes that by
evaluating competitive instruments and pricing in its market area, it can manage
and control maturing  deposits so that a substantial  amount of such deposits is
retained in Ballston.



                                       6
<PAGE>

During the three months ended March 31, 1998 , Ballston  experienced  a net cash
outflow from financing activities of $4,872,000, primarily due to a net decrease
in deposits  of  $6,604,000,  which was  partially  offset by a net  increase in
securities sold under repurchase agreements of $1,773,000.  Ballston's investing
activities  during the three months ended March 31, 1998  resulted in a net cash
outflow of $3,161,000, primarily due to the purchase of investment securities of
$6,908,000,  which was  partially  offset by  proceeds  from the  maturities  of
investment  securities of $2,846,000  and the net decrease in loans of $789,000.
In addition,  Ballston experienced positive cash flows from operating activities
during the three months ended March 31, 1998 of $298,000.

Net cash  provided by  operating  activities  increased  $203,000  for 1997 from
$612,000 for 1996. The increase was attributable to changes in various operating
assets and  liabilities  in the normal course of business.  Net cash provided by
investing  activities for 1997 totaled  $11,447,000,  an increase of $23,387,000
from 1996 when  $11,940,000 was used in investing  activities.  The increase was
primarily attributable to a decrease in interest bearing deposits with financial
institutions  of $1,775,000 for 1997 as compared to an increase in such deposits
of  $2,386,000  for 1996, a decrease in purchases of  investment  securities  of
$11,403,000, an increase in proceeds from maturities of investment securities of
$3,000,000,  and a decrease  in loans of  $1,488,000  for 1997 as compared to an
increase  in loans of  $3,275,000  for  1996.  Net cash  provided  by  financing
activities for 1997 totaled  $920,000 as compared to  $10,050,000  for 1996. The
decrease of $9,130,000 was primarily the result of smaller increases for 1997 as
compared to 1996 of  $6,703,000 in deposits and  $1,772,000  in securities  sold
under repurchase agreements.


                                       7
<PAGE>
<TABLE>


                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                                   UNAUDITED CONSOLIDATED STATEMENTS OF CONDITION
<CAPTION>
<S> <C>
                                                                                    March 31,          March 31,
                                                                                      1998               1997
                                                                                  ------------       ------------
                                             ASSETS                                (Unaudited)       (Unaudited)

Cash and due from banks                                                           $  1,968,781        $ 1,944,562
Federal funds sold                                                                   9,351,283          4,459,589
                                                                                  ------------        -----------
    Cash and cash equivalents                                                       11,320,064          6,404,151
Interest bearing deposits with financial institutions                                2,877,850          2,573,937
Investment securities                                                               19,643,807         18,431,959
Loans, net                                                                          39,887,251         41,600,906
Bank premises and equipment, net                                                       620,719            539,661
Accrued interest receivable                                                            353,575            408,036
Foreclosed real estate held for sale                                                   595,316          1,094,473
Other assets                                                                           376,053            421,900
                                                                                  ------------        -----------
              Total assets                                                         $75,674,635        $71,475,023
                                                                                  ============        ===========
                              LIABILITIES AND STOCKHOLDERS' EQUITY

LIABILITIES:
    Deposits:
      Demand                                                                       $12,715,130        $10,558,926
      NOW accounts                                                                  10,533,276          8,772,218
      Savings                                                                       13,362,849         14,093,931
      Time, $100,000 and over                                                       13,926,372          8,837,226
      Other time                                                                     7,902,503         14,993,095
                                                                                  ------------        -----------
           Total deposits                                                           58,440,130         57,255,396
    Borrowed funds:
      Securities sold under repurchase agreements                                    7,662,569          5,294,763
      Advances from Federal Home Loan Bank                                             681,000            681,000
    Accrued interest and other liabilities                                             576,093            544,766
                                                                                  ------------        -----------
           Total liabilities                                                        67,359,792         63,775,925
                                                                                  ------------        -----------

STOCKHOLDERS' EQUITY:
    Preferred stock, $.20 par value, 500,000 shares authorized,
          none issued and outstanding                                                        -                  -
    Common stock, $.20 par value, 2,500,000 shares
          authorized, 1,619,474 shares issued and outstanding                          323,895            323,895
    Surplus                                                                          6,631,306          6,631,306
    Retained earnings                                                                1,359,211            785,107
    Accumulated other comprehensive income:
      Unrealized holding gain on securities, net of tax                                    431            (41,210)
                                                                                  ------------        -----------
           Total stockholders' equity                                                8,314,843          7,699,098
                                                                                  ------------        -----------
              Total liabilities and stockholders' equity                           $75,674,635        $71,475,023
                                                                                   ===========        ===========

See Notes to Unaudited Consolidated Financial Statements


                                       8
<PAGE>

                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                         UNAUDITED CONSOLIDATED STATEMENTS OF INCOME AND RETAINED EARNINGS
<CAPTION>
                                                                                   Three Months      Three Months
                                                                                     Ended              Ended
                                                                                    March 31,          March 31,
                                                                                       1998               1997
                                                                                   -------------      ------------
                                                                                    (Unaudited)        (Unaudited)
Interest income:
                                                                                   
                                                                                  
    Interest and fees on loans                                                    $     951,890      $     979,541
    Interest on investment securities:
      U.S. Treasury securities                                                           39,111             61,966
      U.S. Government agencies and corporations                                         219,348            239,919
      Other                                                                               8,731             10,167
    Interest on federal funds sold                                                      174,688             63,918
    Interest on deposits with financial institutions                                     36,314             38,742
                                                                                  -------------      -------------
              Total interest income                                                   1,430,082          1,394,253
                                                                                  -------------      -------------

 Interest expense:
    Interest on deposits                                                                472,079            481,405
    Interest on borrowed funds                                                          111,166             85,407
                                                                                  -------------      -------------
              Total interest expense                                                    583,245            566,812
                                                                                  -------------      -------------

 Net interest income                                                                    846,837            827,441
Provision for loan losses                                                                15,000             15,000
                                                                                  -------------      -------------
Net interest income after provision for loan losses                                     831,837            812,441
                                                                                  -------------      -------------

 Other income:
    Service charges on deposit accounts                                                  32,478             46,539
    Other                                                                                62,211             70,556
                                                                                        -------            ------
              Total other income                                                         94,689            117,095

Other expenses:
    Salaries and employee benefits                                                      207,467            330,280
    Occupancy expense                                                                    69,113             55,110
    Furniture and equipment expenses                                                     36,858             42,016
    Merger expenses                                                                     163,461                  -
    Other operating expenses                                                            226,993            248,048
                                                                                  -------------      -------------
              Total other expenses                                                      703,892            675,454
                                                                                  -------------      -------------

Income before income taxes                                                              222,634            254,082
Income taxes                                                                            117,471             89,885
                                                                                  -------------      -------------

NET INCOME                                                                              105,163            164,197
Retained earnings:
    Balance, beginning of period                                                      1,294,535            653,300
      Cash dividends                                                                    (40,487)           (32,390)
                                                                                  -------------      -------------
    Balance, end of period                                                        $   1,359,211      $     785,107
                                                                                  =============      =============


Net income per common share                                                               $ .06              $ .10
                                                                                          =====              =====
See Notes to Unaudited Consolidated Financial Statements



                                       9
<PAGE>

                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                             UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
<CAPTION>

                                                                                  Three Months      Three Months
                                                                                     Ended             Ended
                                                                                    March 31,         March 31,
                                                                                       1998              1997
                                                                                   ----------        ---------
                                                                                  (Unaudited)       (Unaudited)

Net income                                                                          $  105,163        $ 164,197
                                                                                    ----------        ---------

Other comprehensive income (loss):
    Unrealized holding loss on securities                                              (20,838)         (52,018)
    Income tax benefit                                                                   7,085           17,686
                                                                                    ----------        ---------
      Total other comprehensive income (loss)                                          (13,753)         (34,332)
                                                                                    ----------        ---------

COMPREHENSIVE INCOME                                                                $   91,410        $ 129,865
                                                                                    ==========        =========


See Notes to Unaudited Consolidated Financial Statements

                                       10
<PAGE>


                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                                  UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS
<CAPTION>

                                                                                   Three Months      Three Months
                                                                                       Ended             Ended
                                                                                     March 31,         March 31,
                                                                                        1998              1997
                                                                                   -------------      ------------
                                                                                    (Unaudited)       (Unaudited)
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income                                                                     $     105,163      $    164,197

    Adjustments to reconcile net income to net cash provided
         by operating activities:
      Deferred income taxes                                                              (19,084)          (21,705)
      Accretion and amortization of discounts and premiums, net                          (19,450)            8,557
      Provision for loan losses                                                           15,000            15,000
      Depreciation and amortization on bank premises and equipment                        26,512            29,704
      Decrease (increase) in accrued interest receivable                                  14,940           (11,514)
      Decrease in other assets                                                            56,735            56,243
      Increase in accrued interest and other liabilities                                 118,504           131,226
                                                                                   -------------      ------------
              Net cash provided by operating activities                                  298,320           371,708
                                                                                   -------------      ------------

CASH FLOWS FROM INVESTING ACTIVITIES:
    Net decrease (increase) in interest bearing deposits with
          financial institutions                                                        (389,113)        1,689,441
    Purchases of investment securities held-to-maturity                              (5,403,044)                 -
    Proceeds from maturities of investment securities held-to-maturity                 1,846,492         1,000,000
    Principal collected on investment securities held-to-maturity                        377,628           348,359
    Purchases of investment securities available-for-sale                            (1,505,300)          (31,900)
    Proceeds from maturities of investment securities available-for-sale               1,000,000         4,000,000
    Principal collected on investment securities available-for-sale                      171,305            12,571
    Net decrease in loans                                                                789,165           521,735
    Purchase of bank premises and equipment                                              (47,910)          (14,143)
                                                                                   -------------      ------------
              Net cash provided by (used in) investing activities                     (3,160,777)        7,526,063
                                                                                   -------------      ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
    Net decrease in deposits                                                          (6,604,249)       (6,168,390)
    Net increase (decrease) in securities sold under
      repurchase agreements                                                            1,773,036          (315,445)
    Repayments of Federal Home Loan Bank advances                                              -          (850,000)
    Cash dividends paid                                                                  (40,487)          (32,390)
                                                                                   -------------      ------------
              Net cash used in financing activities                                   (4,871,700)       (7,366,225)
                                                                                   -------------      ------------

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                      (7,734,157)          531,546

CASH AND CASH EQUIVALENTS:
    Beginning of period                                                               19,054,221         5,872,605
                                                                                   -------------      ------------

    End of period                                                                  $  11,320,064      $  6,404,151
                                                                                   =============      ============

</TABLE>

See Notes to Unaudited Consolidated Financial Statements


                                       11
<PAGE>

                      BALLSTON BANCORP, INC. AND SUBSIDIARY

              NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS


NOTE 1 - BASIS OF PRESENTATION:

In the opinion of management, the accompanying unaudited consolidated financial
statements reflect all adjustments (which include normal recurring adjustments)
necessary to present fairly the financial position as of March 31, 1998 and
1997, and the results of operations, comprehensive income and cash flows for the
three months ended March 31, 1998 and 1997. These unaudited consolidated
financial statements should be read in conjunction with the consolidated
financial statements and notes for the year ended December 31, 1997. The results
of operations for the three months ended March 31, 1998 are not necessarily
indicative of the operating results which may be achieved for the full fiscal
year.

NOTE 2 - MERGER:

On March 11, 1998,  Ballston entered into the Agreement and Plan of Merger,  and
the related Plan of Merger  (collectively,  the "Merger Agreement")  pursuant to
which Ballston will be merged (the "Merger") with and into MainStreet  BankGroup
Incorporated  ("MSBC").  Under the terms of the Merger Agreement,  each share of
common stock, par value $0.20 per share, of Ballston will be converted into that
portion  of a share  of MSBC  common  stock  having a  market  value of  $12.04,
provided  that a minimum of 0.4025  share and a maximum of 0.4920  share of MSBC
common stock will be issued for each share of Ballston common stock.

Consummation  of the Merger is subject,  among other things,  to the approval of
the Merger  Agreement by the  requisite  vote of Ballston  shareholders  and the
receipt  of  all  requisite  regulatory  approvals  and  satisfaction  of  other
conditions contained in the Merger Agreement.  It is anticipated that the Merger
will be  accounted  for as a  pooling  of  interests  under  generally  accepted
accounting principles.

In connection with the Merger Agreement,  MSBC and Ballston entered into a Stock
Option  Agreement,  dated as of March 11,  1998 (the  "Option  Agreement").  The
Option  Agreement  provides  that MSBC shall have the option to  purchase  up to
322,275 of the authorized,  but unissued, shares of Ballston's common stock at a
price of $8.64 per share, only upon the occurrence of certain specified events.

Ballston has agreed to pay a transaction fee in connection with the Merger to an
investment  banking firm. Under the terms of the agreement,  the fee is equal to
0.5% of the aggregate  transaction  price.  A substantial  portion of the fee is
contingent upon the consummation of the Merger.  Fees to that firm for the three
months ended March 31, 1998 totaled $34,375 and are included in merger expenses.

NOTE 3 - NET INCOME PER COMMON SHARE:

Net income per common  share is computed  using the weighted  average  number of
common shares outstanding during the year. The weighted average number of shares
was 1,619,474 for the three months ended March 31, 1998 and 1997.


                                       12
<PAGE>


NOTE 4 - INCOME TAXES:

Income tax expense  differs from that computed at the statutory  Federal  income
tax rate for the three  months ended March 31,  1998,  primarily  due to certain
merger related expenses not being deductible for income tax purposes.

NOTE 5 - NEW ACCOUNTING PRONOUNCEMENTS:

Statement of Financial  Accounting  Standards No. 130, "Reporting  Comprehensive
Income" was issued in June 1997.  This  statement is effective  for fiscal years
beginning after December 15, 1997 and  reclassification of financial  statements
for  earlier  periods  provided  for  comparative  purposes  is  required.  This
statement  establishes  standards  for  reporting  and display of  comprehensive
income and its  components  in the  financial  statements.  The objective of the
statement is to report a measure of all changes in equity of an enterprise  that
results from  transactions  and other  economic  events of the period other than
transactions  with owners.  Ballston adopted this statement in the first quarter
of 1998,  and has  included  its  comprehensive  income in a separate  financial
statement as part of its unaudited consolidated financial statements.

NOTE 6 - SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:

                                              Three Months     Three Months
                                                 Ended            Ended
                                                March 31,        March 31,
                                                  1998             1997
                                               -----------     ------------
        Cash paid for:
          Interest on deposits                  $ 499,928       $ 435,308
          Interest on borrowed funds              111,436          88,894
          Income taxes                              5,231          24,796










                                       13
<PAGE>









                             BALLSTON BANCORP, INC.
                                 AND SUBSIDIARY
                    AUDITED CONSOLIDATED FINANCIAL STATEMENTS
                           December 31, 1997 and 1996








                                       14
<PAGE>

                      BALLSTON BANCORP, INC. AND SUBSIDIARY
                   AUDITED CONSOLIDATED FINANCIAL STATEMENTS



                                 C O N T E N T S


                                                                           Page
                                                                           ----

Independent Auditors' Report                                                16

Consolidated Statements of Condition                                        17

Consolidated Statements of Income                                           18

Consolidated Statements of Changes in Stockholders' Equity                  19

Consolidated Statements of Cash Flows                                       20

Notes to Consolidated Financial Statements                               21 - 33






                                       15
<PAGE>





                          Independent Auditors' Report






To the Board of Directors and Shareholders of
Ballston Bancorp, Inc.


We have  audited  the  accompanying  consolidated  statements  of  condition  of
Ballston Bancorp,  Inc. and Subsidiary as of December 31, 1997 and 1996, and the
related consolidated  statements of income, changes in stockholders' equity, and
cash  flows  for the  years  then  ended.  These  financial  statements  are the
responsibility of the Corporations' management. Our responsibility is to express
an opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  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 audits provide a reasonable basis for our opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly, in all material  respects,  the financial  position of Ballston Bancorp,
Inc. and  Subsidiary as of December 31, 1997 and 1996,  and the results of their
operations  and their cash flows for the years  then  ended in  conformity  with
generally accepted accounting principles.


STOY, MALONE & COMPANY, P.C.

Bethesda, Maryland
January 26, 1998





                                       16
<PAGE>

<TABLE>


                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                                       CONSOLIDATED STATEMENTS OF CONDITION
<CAPTION>
<S> <C>
                                                                                   December 31,       December 31,
                                                                                       1997               1996
                                                                                   ------------       ------------
                                    ASSETS

Cash and due from banks                                                            $  2,979,221       $  2,247,261
Federal funds sold                                                                   16,075,000          3,625,344
                                                                                   ------------       ------------
    Cash and cash equivalents                                                        19,054,221          5,872,605
Interest bearing deposits with financial institutions                                 2,488,737          4,263,378
Investment securities                                                                16,132,276         23,821,565
Loans, net                                                                           40,691,416         42,137,641
Bank premises and equipment, net                                                        599,321            555,222
Accrued interest receivable                                                             368,515            396,522
Foreclosed real estate held for sale                                                    610,316          1,124,383
Other assets                                                                            391,619            408,841
                                                                                   ------------       ------------
              Total assets                                                         $ 80,336,421       $ 78,580,157
                                                                                   ============       ============


                     LIABILITIES AND STOCKHOLDERS' EQUITY

LIABILITIES:
    Deposits:
      Demand                                                                        $12,595,875        $10,792,315
      NOW accounts                                                                   16,594,682         14,522,875
      Savings                                                                        13,153,753         14,180,324
      Time, $100,000 and over                                                        14,631,242         14,689,867
      Other time                                                                      8,068,827          9,238,405
                                                                                   ------------       ------------
           Total deposits                                                            65,044,379         63,423,786
    Borrowed funds:
      Securities sold under repurchase agreements                                     5,889,533          5,610,208
      Advances from Federal Home Loan Bank                                              681,000          1,531,000
    Accrued interest and other liabilities                                              457,589            413,540
                                                                                   ------------       ------------
           Total liabilities                                                         72,072,501         70,978,534
                                                                                   ------------       ------------

COMMITMENTS AND CONTINGENCIES (Notes 8 and 11)

STOCKHOLDERS' EQUITY:
    Preferred stock, $.20 par value, 500,000 shares authorized,
          none issued and outstanding                                                         -                  -
    Common stock, $.20 par value, 2,500,000 shares
          authorized, 1,619,474 shares issued and outstanding                           323,895            323,895
    Surplus                                                                           6,631,306          6,631,306
    Retained earnings                                                                 1,294,535            653,300
    Net unrealized holding gain (loss), net of tax                                       14,184             (6,878)
                                                                                   ------------       ------------
           Total stockholders' equity                                                 8,263,920          7,601,623
                                                                                   ------------       ------------
              Total liabilities and stockholders' equity                           $ 80,336,421       $ 78,580,157
                                                                                   ============       ============


The Notes to  Consolidated  Financial  Statements  are an integral part of these
statements.



                                       17
<PAGE>

                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                                         CONSOLIDATED STATEMENTS OF INCOME
<CAPTION>

                                                                                    Year Ended        Year Ended
                                                                                    December 31,      December 31,
                                                                                        1997              1996
                                                                                    ------------      ------------
Interest income:
    Interest and fees on loans                                                      $  4,072,513      $  3,972,316
    Interest on investment securities:
      U.S. Treasury securities                                                           223,611           165,739
      U.S. Government agencies and corporations                                          875,568           884,874
      Other                                                                               43,608            68,199
    Interest on federal funds sold                                                       305,542           284,994
    Interest on deposits with financial institutions                                     142,634           104,173
                                                                                    ------------      ------------
              Total interest income                                                    5,663,476         5,480,295
                                                                                    ------------      ------------

Interest expense:
    Interest on deposits                                                               1,908,996         1,925,810
    Interest on borrowed funds                                                           370,062           299,241
                                                                                    ------------      ------------
              Total interest expense                                                   2,279,058         2,225,051
                                                                                    ------------      ------------

Net interest income                                                                    3,384,418         3,255,244
Provision for loan losses                                                                 17,927            12,000
                                                                                    ------------      ------------
Net interest income after provision for loan losses                                    3,366,491         3,243,244
                                                                                    ------------      ------------

Other income:
    Service charges on deposit accounts                                                  171,526           199,531
    Gain on sale of foreclosed real estate                                               190,712                 -
    Other                                                                                235,917           165,099
                                                                                    ------------      ------------
              Total other income                                                         598,155           364,630
                                                                                    ------------      ------------

Other expenses:
    Salaries and employee benefits                                                     1,168,584         1,215,569
    Occupancy expense                                                                    254,033           212,281
    Furniture and equipment expenses                                                     192,217           185,657
    Other operating expenses                                                           1,161,406           861,203
                                                                                    ------------      ------------
              Total other expenses                                                     2,776,240         2,474,710
                                                                                    ------------      ------------

Income before income taxes                                                             1,188,406         1,133,164
Income taxes                                                                             417,614           391,991
                                                                                    ------------      ------------

NET INCOME                                                                          $    770,792      $    741,173
                                                                                    ============      ============

Net income per common share                                                                $ .48             $ .46
                                                                                           =====             =====


The Notes to  Consolidated  Financial  Statements  are an integral part of these
statements.



                                       18
<PAGE>

                                      BALLSTON BANCORP, INC. AND SUBSIDIARY

                           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

                                     Years Ended December 31, 1997 and 1996
<CAPTION>


                                                                                        Net
                                                                                     Unrealized        Total
                                                                                      Holding          Stock-
                                        Common                         Retained      Gain (Loss),     holders'
                                         Stock         Surplus         Earnings      Net of Tax        Equity
                                     -------------- --------------- --------------- -------------  ---------------

Balance, January 1, 1996                  $323,895      $6,631,306     $    25,490   $   (1,539)      $ 6,979,152

Net income                                       -               -         741,173             -          741,173

Cash dividends - $.07
    per share                                    -               -        (113,363)            -         (113,363)

Net change in unrealized
    holding gain (loss), net of tax              -               -              -        (5,339)           (5,339)
                                          --------      ----------     -----------   ----------       -----------
                                                                                                                  

Balance, December 31, 1996                 323,895       6,631,306         653,300       (6,878)        7,601,623

Net income                                       -               -         770,792            -           770,792

Cash dividends - $.08
    per share                                    -               -        (129,557)           -          (129,557)

Net change in unrealized
    holding gain (loss), net of tax              -               -               -       21,062            21,062
                                          --------      ----------     -----------   ----------       -----------

Balance, December 31, 1997                $323,895      $6,631,306      $1,294,535    $  14,184      $ 8,263,920
                                          ========      ==========      ==========    =========      ===========


The Notes to  Consolidated  Financial  Statements  are an integral part of these
statements.



                                       19
<PAGE>

                                       BALLSTON BANCORP, INC. AND SUBSIDIARY
                                       CONSOLIDATED STATEMENTS OF CASH FLOWS
<CAPTION>

                                                                                     Year Ended       Year Ended
                                                                                     December 31,     December 31,
                                                                                         1997             1996
                                                                                    -------------     ------------
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income                                                                      $     770,792     $    741,173
    Adjustments to reconcile net income to net
        cash provided by operating activities:
      Deferred income taxes
                                                                                           (2,987)          18,525
      Accretion and amortization of discounts and premiums, net                            27,457            5,737
      Provision for loan losses                                                            17,927           12,000
      (Gain) loss on sale of foreclosed real estate                                      (190,712)           1,167
      Depreciation and amortization on bank premises and equipment                        110,455          116,139
      Decrease (increase) in accrued interest receivable                                   28,007          (31,503)
      Decrease in other assets                                                              9,359           57,871
      Increase (decrease) in accrued interest and other liabilities                        44,049         (309,487)
                                                                                    -------------     ------------
              Net cash provided by operating activities                                   814,347          611,622
                                                                                    -------------     ------------

CASH FLOWS FROM INVESTING ACTIVITIES:
    Net decrease (increase) in interest bearing deposits with
          financial institutions                                                        1,774,641       (2,386,491)
    Purchases of investment securities held-to-maturity                                 (155,262)       (4,050,492)
    Proceeds from maturities of investment securities held-to-maturity                  2,000,000        2,950,000
    Principal collected on investment securities held-to-maturity                       1,418,232        1,893,373
    Purchases of investment securities available-for-sale                                               (7,551,202)
                                                                                          (43,050)
    Proceeds from maturities of investment securities available-for-sale                4,300,000          350,000
    Principal collected on investment securities available-for-sale                       173,824                -
    Net decrease (increase) in loans                                                    1,488,298       (3,275,247)
    Purchase of bank premises and equipment                                              (154,554)         (35,350)
    Proceeds from sales of foreclosed real estate                                         603,755          101,578
    Payments received on foreclosed real estate                                            41,024           64,197
                                                                                    -------------     ------------
              Net cash provided by (used in) investing activities                      11,446,908      (11,939,634)
                                                                                    -------------     ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
    Net increase in deposits                                                            1,620,593        8,323,461
    Net increase in securities sold under repurchase agreements                           279,325        2,051,679
    Advances from Federal Home Loan Bank                                                        -          288,000
    Repayments of Federal Home Loan Bank advances                                        (850,000)        (500,000)
    Cash dividends paid                                                                  (129,557)        (113,363)
                                                                                    -------------     ------------
              Net cash provided by financing activities                                   920,361       10,049,777
                                                                                    -------------     ------------

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                        3,181,616       (1,278,235)

CASH AND CASH EQUIVALENTS:
    Beginning of year                                                                   5,872,605        7,150,840
                                                                                    -------------     ------------

    End of year                                                                     $  19,054,221     $  5,872,605
                                                                                    =============     ============

</TABLE>

The Notes to  Consolidated  Financial  Statements  are an integral part of these
statements.



                                       20
<PAGE>

                      BALLSTON BANCORP, INC. AND SUBSIDIARY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES:

A summary of  significant  accounting  policies of Ballston  Bancorp,  Inc.  and
Subsidiary (the "Corporations") is as follows:

BASIS OF ACCOUNTING:

The accompanying  consolidated  financial  statements are prepared in accordance
with generally accepted  accounting  principles and conform to general practices
within the banking industry.

PRINCIPLES OF CONSOLIDATION:

The  accompanying  consolidated  financial  statements  include the  accounts of
Ballston Bancorp, Inc. ("Ballston") and its wholly-owned subsidiary, The Bank of
Northern Virginia ("The Bank").  All significant  intercompany  transactions and
balances have been eliminated.

NATURE OF OPERATIONS:

Ballston  was  organized  under the laws of the State of  Delaware to serve as a
bank  holding  company.  The Bank  operates as a commercial  bank in  Arlington,
Virginia.  Its primary  deposit base and principal  real estate  lending  market
includes Arlington and the surrounding area in Northern Virginia.

USE OF ESTIMATES:

The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect  the  reported  amounts  of assets  and  liabilities  and  disclosure  of
contingent  assets and  liabilities at the date of the financial  statements and
the reported amounts of income and expenses during the reporting period.  Actual
results could differ from those estimates.

Material  estimates that are  particularly  susceptible  to  significant  change
relate to the  determination  of the allowance for loan losses and the valuation
of real estate  acquired in connection  with  foreclosures or in satisfaction of
loans. In connection with the determination of the allowance for loan losses and
the  valuation  of  foreclosed  real  estate,   management  obtains  independent
appraisals  for  significant   properties.   While   management  uses  available
information  to recognize  losses on loans and  foreclosed  real estate,  future
additions to the allowance may be necessary  based on changes in local  economic
conditions. Federal, state and local governments employ a significant portion of
the Northern Virginia area labor force.  Adverse changes in economic  conditions
could have a direct impact on the  collectibility  of The Bank's loan  portfolio
and the recovery of a substantial  portion of the carrying  amount of foreclosed
real estate.  In addition,  regulatory  agencies,  as an integral  part of their
examination  process,  periodically  review The Bank's allowance for loan losses
and valuation of foreclosed  real estate.  Such agencies may require The Bank to
recognize  additions to the allowance based on their judgments about information
available to them at the time of their examination. Because of these factors, it
is  reasonably  possible that the allowance for loan losses and the valuation of
foreclosed  real  estate  may  change  materially  in the  near  term.


                                       21
<PAGE>

NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES: (Cont'd.)

CASH AND CASH EQUIVALENTS:

For financial  reporting  purposes,  cash and cash equivalents  includes cash on
hand, amounts due from banks (including cash items in process of clearing),  and
federal funds sold.  Cash flows from interest  bearing  deposits with  financial
institutions,  loans,  deposits and securities sold under repurchase  agreements
are reported net.

INVESTMENT SECURITIES:

Held-to-maturity securities are those securities which the Corporations have the
ability and intent to hold until  maturity  and are carried at  amortized  cost.
Available-for-sale  securities  represent  those  securities  not  classified as
held-to-maturity  and are stated at fair  value.  Unrealized  holding  gains and
losses,  net of the  related  deferred  tax effect,  are  reported as a separate
component of stockholders' equity.

Premiums and discounts on  investments  in debt  securities  are amortized  over
their  contractual  lives.  The  method of  amortization  results  in a constant
effective yield on those  securities  which  approximates  the interest  method.
Realized  gains and losses are  included  in income  and are  determined  by the
specific-identification method.

LOANS:

Loans are stated at the amount of unpaid principal  reduced by unearned fees and
an allowance for loan losses.

The allowance for loan losses is  maintained at a level which,  in  management's
judgment,  is adequate to absorb credit losses  inherent in the loan  portfolio.
The  amount  of  the  allowance  is  based  on  management's  evaluation  of the
collectibility  of the loan  portfolio,  including the nature of the  portfolio,
credit concentrations,  trends in historical loss experience,  specific impaired
loans,  and economic  conditions.  Allowances  for impaired  loans are generally
determined  based on collateral  values or the present  value of estimated  cash
flows.  The  allowance  for loan losses is  increased  by a  provision  for loan
losses,  which is  charged  to  expense,  and  reduced  by  charge-offs,  net of
recoveries.

Interest is accrued daily on the  outstanding  balances.  Accrual of interest is
discontinued on a loan when management  believes,  after considering  collection
efforts and other factors,  that the borrower's financial condition is such that
collection of interest is doubtful.

Loan origination fees and certain direct  origination  costs are capitalized and
recognized as an adjustment of the yield on the related loan.

FORECLOSED REAL ESTATE HELD FOR SALE:

Foreclosed  real  estate held for sale,  includes  properties  acquired  through
foreclosure or in full or partial  satisfaction of the related loan.  Foreclosed
real estate is  initially  recorded at the lower of fair value,  less  estimated
selling  costs,  or  cost,  at  the  date  of  foreclosure.  After  foreclosure,
valuations are periodically performed by management and the assets are stated at
the lower of carrying value or fair value, less estimated selling costs.


                                       22
<PAGE>

NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES:  (Cont'd.)

BANK PREMISES AND EQUIPMENT:

Bank premises and equipment is stated at cost less accumulated  depreciation and
amortization.  Leasehold  improvements are amortized on the straight-line method
over the shorter of the estimated  useful lives of the improvements or the terms
of  the  related   leases.   Furniture  and  equipment  is  depreciated  on  the
straight-line method over the estimated useful lives of the assets.

ADVERTISING:

Advertising  costs are expensed as incurred.  These expenses  amounted to $9,758
and $14,843 for the years ended  December 31, 1997 and 1996,  respectively,  and
are  included in other  operating  expenses in the  consolidated  statements  of
income.

INCOME TAXES:

The  Corporations  file a consolidated  Federal income tax return.  Deferred tax
assets and liabilities  are recognized for the expected future tax  consequences
of  temporary  differences  between  the  carrying  amounts and the tax bases of
assets and  liabilities.  As changes in tax laws or rates are enacted,  deferred
tax assets and liabilities are adjusted through the provision for income taxes.

NET INCOME PER COMMON SHARE:

Effective December 31, 1997, Ballston adopted Statement of Financial  Accounting
Standards No. 128,  "Earnings per Share".  The adoption of this statement had no
effect on Ballston.  Net income per common share is computed  using the weighted
average  number of common  shares  outstanding  during  the year.  The  weighted
average number of shares was 1,619,474 for both 1997 and 1996.

OFF-BALANCE-SHEET FINANCIAL INSTRUMENTS:

In the ordinary course of business,  The Bank has entered into off-balance-sheet
financial  instruments  consisting of  commitments  to extend credit and standby
letters of credit.  Such  financial  instruments  are recorded in the  financial
statements when they become payable.

NOTE 2 - INVESTMENT SECURITIES:

A summary of investment securities is as follows:

                                       23
<PAGE>
<TABLE>
<CAPTION>
<S> <C>

                                                          Gross        Gross
                                         Amortized      Unrealized    Unrealized        Fair           Carrying
                                            Cost           Gains        Losses          Value            Value
                                        -----------      --------      --------      -----------      -----------
December 31, 1997
Available-for-sale:
   Debt securities:
      U.S. Treasury securities          $   999,587      $   -         $    212      $   999,375      $   999,375
      U.S. Government agencies
        and corporations                    498,699           989          -             499,688          499,688
      Mortgage-backed securities          1,869,195        20,714          -           1,889,909        1,889,909
                                        -----------      --------      --------      -----------      -----------
                                          3,367,481        21,703           212        3,388,972        3,388,972
   Equity securities                        460,050          -             -             460,050          460,050
                                        -----------      --------      --------      -----------      -----------
                                          3,827,531        21,703           212        3,849,022        3,849,022
                                        -----------      --------      --------      -----------      -----------
Held-to-maturity:
   Debt securities:
      U.S. Treasury securities            2,504,737        35,107          -           2,539,844        2,504,737
      U.S. Government agencies
        and corporations                  3,599,071        32,758         7,821        3,624,008        3,599,071
      State and political
        subdivisions                        154,878         5,823          -             160,701          154,878
      Mortgage-backed securities          6,024,568       166,610        28,405        6,162,773        6,024,568
                                        -----------      --------      --------      -----------      -----------
                                         12,283,254       24O,298        36,226       12,487,326       12,283,254
                                        -----------      --------      --------      -----------      -----------
           Total                        $16,110,785      $262,001      $ 36,438      $16,336,348      $16,132,276
                                        ===========      ========      ========      ===========      ===========
December 31, 1996
Available-for-sale:
 Debt securities:
      U.S. Treasury securities          $ 4,990,425      $   -         $  5,185      $ 4,985,240      $ 4,985,240
      U.S. Government agencies
         and corporations                   498,438          -            3,908          494,530          494,530
      Corporate securities                  301,650          -            1,327          300,323          300,323
      Mortgage-backed securities          2,048,745          -             -           2,048,745        2,048,745
                                        -----------      --------      --------      -----------      -----------
                                          7,839,258          -           10,420        7,828,838        7,828,838
 Equity securities                          417,000          -             -             417,000          417,000
                                        -----------      --------      --------      -----------      -----------
                                          8,256,258          -           10,420        8,245,838        8,245,838
                                        -----------      --------      --------      -----------      -----------
Held-to-maturity:
  Debt securities:
      U.S. Treasury securities            3,005,695        34,007           486        3,039,216        3,005,695
      U.S. Government agencies
         and corporations                 5,098,991        41,714        29,075        5,111,630        5,098,991
      Mortgage-backed securities          7,471,041        59,477       102,688        7,427,830        7,471,041
                                        -----------      --------      --------      -----------      -----------
                                         15,575,727       135,198       132,249       15,578,676       15,575,727
                                        -----------      --------      --------      -----------      -----------
           Total                        $23,831,985      $135,198      $142,669      $23,824,514      $23,821,565
                                        ===========      ========      ========      ===========      ===========
</TABLE>


                                       24
<PAGE>
<TABLE>
NOTE 2 - INVESTMENT SECURITIES:  (Cont'd.)

The  amortized  cost and fair value of debt  securities  at December 31, 1997 by
contractual  maturity,  are shown below.  Maturities may differ from contractual
maturities in mortgage-backed  securities  because the mortgages  underlying the
securities  may be called or repaid  without  any  penalties.  Therefore,  these
securities are not included in the maturity categories in the following maturity
summary.
<CAPTION>
<S> <C>
                                               Available-for-Sale                 Held-to-Maturity
                                               ------------------                 ----------------
                                            Amortized                         Amortized
                                               Cost         Fair Value           Cost          Fair Value
                                            ----------      ----------       -----------       -----------
     Due in one year or less                $  999,587      $  999,375       $ 2,499,896       $ 2,503,388
     Due from one year to five years                --              --         3,303,912         3,360,559
     Due from five years to ten years          498,699         499,688                --                --      
     Due after ten years                            --              --           454,878           460,606
     Mortgage-backed securities              1,869,195       1,889,909         6,024,568         6,162,773
                                            ----------      ----------       -----------       -----------
         Total                              $3,367,481     $ 3,388,972       $12,283,254       $12,487,326
                                            ==========     ===========       ===========       ===========
</TABLE>
There were no sales of investment securities during the years ended December 31,
1997 and 1996.

The change in unrealized holding gain (loss) during the years ended December 31,
1997 and 1996 consisted of the following:

                                                             1997       1996
                                                           --------   --------
Balance, beginning of year                                 $ (6,878)  $ (1,539)
Unrealized gain (loss) on available-for-sale securities      31,911     (8,091)
Related deferred taxes                                      (10,849)     2,752
                                                           --------   --------
Balance, end of year                                       $ 14,184   $ (6,878)
                                                           ========   ======== 

At December 31, 1997 and 1996,  investment  securities  with a carrying value of
approximately $10,328,000 and $12,400,000,  respectively, were pledged to secure
securities sold under  repurchase  agreements and public deposits as required or
permitted by law.


                                       25
<PAGE>


NOTE 3 - LOANS:

The composition of net loans is as follows at December 31:

                                                   1997              1996
                                               -----------       -----------
        Time and demand                        $ 8,997,057       $12,162,325
        Real estate                             31,617,419        29,611,223
        Consumer                                   773,248         1,077,778
                                               -----------       -----------
                                                41,387,724        42,851,326
        Less: Unearned fees                         94,009           100,954
              Allowance for loan losses            602,299           612,731
                                               -----------       -----------
        Loans, net                             $40,691,416       $42,137,641
                                               ===========       ===========

Loans with fixed  interest  rates  amounted  to  approximately  $18,439,000  and
$16,966,000  at December 31, 1997 and 1996,  respectively.  Variable  rate loans
totaled approximately $22,949,000 and $25,885,000 at December 31, 1997 and 1996,
respectively.

The Bank had nonaccrual loans of approximately  $211,000 and $15,000 at December
31,  1997 and 1996,  respectively.  Nonaccrual  loans had the effect of reducing
interest  income by  approximately  $5,000 and $100 for the years ended December
31,  1997 and  1996,  respectively.  Interest  income on these  loans,  which is
recorded  only when  received,  amounted to  approximately  $14,000 for the year
ended December 31, 1997. There was no interest  received on nonaccrual loans for
the year ended December 31, 1996.

Loans with a carrying value of  approximately  $3,100,000  and  $3,800,000  were
pledged to secure  advances from the Federal Home Loan Bank at December 31, 1997
and 1996, respectively.


NOTE 4 - ALLOWANCE FOR LOAN LOSSES:

Changes in the allowance  for loan losses were as follows  during the year ended
December 31:

                                                           1997         1996
                                                        ---------    ---------
        Balance, beginning of year                      $ 612,731    $ 652,157
        Provision charged to expense                       17,927       12,000
                                                        ---------    ---------
                                                          630,658      664,157
        Losses charged to allowance, net of recoveries    (28,359)     (51,426)
                                                        ---------    ---------
        Balance, end of year                            $ 602,299    $ 612,731
                                                        =========    =========


                                       26
<PAGE>

NOTE 5 - BANK PREMISES AND EQUIPMENT:

The major  classes of bank  premises  and  equipment  and the total  accumulated
depreciation and amortization are as follows at December 31:

                                                          1997            1996
                                                      ----------      ----------
  Leasehold improvements                              $  791,063      $  750,005
  Furniture and equipment                                784,778         671,282
                                                      ----------      ----------
                                                       1,575,841       1,421,287
    Less accumulated depreciation and amortization       976,520         866,065
                                                      ----------      ----------
  Bank premises and equipment, net                    $  599,321      $  555,222
                                                      ==========      ==========


NOTE 6 - DEPOSITS:

The  scheduled  maturities  of time  deposits  are as follows as of December 31,
1997:

        Year ending December 31:
               1998                            $21,310,307
               1999                                750,301
               2000                                540,972
               2001                                 50,000
               2002                                 48,489
                                               -----------
               Total                           $22,700,069
                                               ===========

NOTE 7 - BORROWED FUNDS:

Securities sold under repurchase  agreements generally mature within one to four
days from the transaction date and totaled $5,889,533 and $5,610,208 at December
31, 1997 and 1996, respectively. The maximum amount of outstanding agreements at
any month end during the years ended  December 31, 1997 and 1996 was  $7,031,485
and $5,851,760,  respectively.  The average end of month outstanding  agreements
were  $5,559,666  and  $4,396,943  during the years ended  December 31, 1997 and
1996,  respectively.  All investment securities underlying these agreements were
under The Bank's control.

At  December  31,  1997 and 1996,  The Bank had  outstanding  advances  from the
Federal  Home  Loan  Bank  totaling   $681,000  and  $1,531,000,   respectively.
Weighted-average  interest  rates on these  advances  were  7.75%  and  6.10% at
December 31, 1997 and 1996, respectively.


                                       27
<PAGE>


NOTE 7 - BORROWED FUNDS:  (Cont'd.)

Future maturities of borrowed funds are as follows at December 31, 1997:

                                                         Amount
                                                         -----------
          Year ending December 31:
                     1998                                $ 5,889,533
                     After 2002                              681,000
                                                         -----------
                            Total                        $ 6,570,533
                                                         ===========


As  described  in Note 2, certain  investment  securities  are pledged to secure
borrowed funds.


NOTE 8 - OPERATING LEASES:

The Corporations have operating leases for office, retail, and storage space and
equipment.  These leases are  noncancelable  and expire  during  1998-2003.  The
office,  retail and storage space leases require  minimum annual rental payments
plus an adjustment  based on 30% of the increase in the Consumer Price Index. In
addition,  the leases provide for the  Corporations  to pay their  proportionate
share of operating  expense  increases.  The retail space leases contain renewal
options.

The  following  is a  schedule  by  years  of  future  minimum  rental  payments
applicable to the leases described above, as of December 31, 1997:

          Year ending December 31:
                     1998                            $ 229,988
                     1999                              216,744
                     2000                              173,677
                     2001                              164,277
                     2002                              130,360
                     Thereafter                         37,801
                                                     ---------
                          Total                      $ 952,847
                                                     =========


The following  schedule  indicates the composition of total rent expense for the
years ended December 31:

                                                         1997          1996
                                                      ---------     ---------
          Minimum rentals                             $ 212,365     $ 169,326
          Contingent rentals                             25,587        27,819
                                                      ---------     ---------
                Total                                 $ 237,952     $ 197,145
                                                      =========     =========


                                       28
<PAGE>

NOTE 9 - INCOME TAXES:

The  components of income tax expense for the years ended  December 31, 1997 and
1996 were as follows:

                                                   1997          1996
                                                ---------     ---------
             Current                            $ 420,601     $ 373,466
             Deferred                              (2,987)       18,525
                                                ---------     ---------
                  Total                         $ 417,614     $ 391,991
                                                =========     =========


As of December 31, 1997, Ballston had approximately  $1,500,000 of net operating
loss  carryforwards  for state income tax purposes which are available to offset
future state taxable income of Ballston.  These  carryforwards  expire beginning
2004 through 2012.

Components of the  Corporations'  deferred tax assets are as follows at December
31:
<TABLE>
<CAPTION>
<S> <C>
                                                             1997           1996
                                                          ---------       ---------
  Deferred tax assets:
    Unearned fees                                         $   4,879       $  13,351
    Allowance for loan losses                               204,782         208,328
    Net unrealized holding loss                                   -           3,543
    Accumulated depreciation and amortization                50,954          35,949
    Net operating loss carryforwards for state income
       tax purposes                                          91,613          74,941
                                                          ---------       ---------
                                                            352,228         336,112
      Less valuation allowance                               91,613          74,941
                                                          ---------       ---------
        Total deferred tax assets                           260,615         261,171
  Deferred tax liabilities:
    Net unrealized holding gain                               7,307               -
                                                          ---------       ---------
        Net deferred tax assets                           $ 253,308       $ 261,171
                                                          =========       =========
</TABLE>

The net deferred  tax assets are  included in other  assets in the  consolidated
statements of condition. Management has adopted a policy to maintain a valuation
allowance to completely  offset any deferred tax asset  resulting  from possible
future  realization  of net operating  loss  carryforwards  for state income tax
purposes.


NOTE 10 - RETIREMENT PLAN:

The  Bank  has a  defined  contribution  401(k)  retirement  plan  which  covers
employees that meet certain age and length of service  requirements.  Under this
plan,  The  Bank  will  match  the  employees'  contributions  up to  6% of  the
employees'  compensation.  For the years ended  December 31, 1997 and 1996,  The
Bank's contribution amounted to $18,000 and $25,314, respectively.





                                       29
<PAGE>

NOTE 11 - COMMITMENTS AND CONTINGENCIES:

FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK:

The Bank is a party to financial instruments with  off-balance-sheet risk in the
normal course of business to meet the financing  needs of its  customers.  These
financial  instruments  include commitments to extend credit and standby letters
of credit.  Those instruments  involve,  to varying degrees,  elements of credit
risk not recognized in the  consolidated  statements of condition.  The contract
amounts of those  instruments  reflect the extent of involvement The Bank has in
particular classes of financial instruments.

The Bank's exposure to credit loss in the event of  nonperformance  by the other
party to the financial  instrument for  commitments to extend credit and standby
letters of credit is represented by the contractual amount of those instruments.
The Bank uses the same credit  policies in making  commitments  and  conditional
obligations as it does for on-balance-sheet instruments.

A summary of The  Bank's  commitments  as of  December  31,  1997 and 1996 is as
follows:

                                                      1997              1996
                                                 -----------      ------------ 
         Commitments to extend credit            $10,452,000      $ 10,794,000
         Standby letters of credit                   944,000         1,002,000


Commitments  to extend  credit are  agreements  to lend to a customer as long as
there is no violation of any condition established in the contract.  Commitments
generally  have fixed  expiration  dates or other  termination  clauses  and may
require  payment of a fee.  Since  commitments  frequently  expire without being
drawn upon, the total  commitment  amounts do not necessarily  represent  future
cash  requirements.  The Bank evaluates each customer's  credit  worthiness on a
case-by-case  basis. The amount of collateral  obtained,  if deemed necessary by
The Bank upon extension of credit, is based on management's credit evaluation of
the  party.  Collateral  held  varies,  but  may  include  accounts  receivable,
marketable  securities,  inventory,  property and  equipment,  residential  real
estate and income-producing commercial properties.

Standby  letters of credit  are  conditional  commitments  issued by The Bank to
guarantee the performance of a customer to a third party.  Those  guarantees are
primarily  issued to  support  public and  private  borrowing  arrangements  and
generally  expire  within one year from  issuance.  The credit risk  involved in
issuing  letters of credit is essentially the same as that involved in extending
loan  facilities to customers.  Collateral held varies as specified above and is
required in instances which The Bank deems necessary.

LITIGATION:

The Corporations occasionally are defendants in certain claims and legal actions
arising in the ordinary course of business. It is the opinion of management that
the disposition of these matters will not have a material  adverse effect on the
Corporations' financial position.




                                       30
<PAGE>

NOTE 11 - COMMITMENTS AND CONTINGENCIES:  (Cont'd.)

OTHER:

The  Corporations  have  an  ongoing  program  designed  to  ensure  that  their
operational  and  financial  systems will not be adversely  affected by the year
2000 software failures due to processing errors arising from calculations  using
the year 2000 data.  While the  Corporations  believe they are doing  everything
technologically possible to assure year 2000 compliance, they are to some extent
dependent upon vendor  cooperation.  The Corporations  are requiring  vendors of
their computer systems and software to represent that the products  provided are
or will be year  2000  compliant  and have  planned  a program  of  testing  for
compliance. It is recognized that any year 2000 compliance failures could result
in additional expense to the Corporations.

The Bank has a contract with an entity, whereby such entity will perform certain
processing  work  necessary to The Bank's  operations for a period of five years
expiring in 2000. The contract provides for automatic  five-year  renewals until
it is terminated. There are no minimum annual fees.

NOTE 12 - RELATED PARTY TRANSACTIONS:

The  Corporations  have  had,  and  may be  expected  to  have  in  the  future,
transactions  in the ordinary course of business with  stockholders,  directors,
officers and  affiliated  entities in which they are  principal  owners,  all of
which  have  been,  in the  opinion  of  management,  on the same terms as those
prevailing at the time for comparable transactions with others.

Loans with related  parties  totaled  $3,095,108  and $3,628,012 at December 31,
1997 and 1996, respectively.

Professional  fees  were paid to firms in which  stockholders  of  Ballston  are
principals. These fees totaled $283,401 and $66,859 for the years ended December
31, 1997 and 1996, respectively.

NOTE 13 - STOCK OPTION AGREEMENTS:

In 1992,  Ballston granted options to purchase 75,000 shares of its common stock
to two key employees of The Bank. The options could only be exercised if certain
performance measures were met by The Bank or if there was a change in control of
Ballston or The Bank, as defined in the  agreements.  The exercise  price of the
options was $3.76 per share. These options expired August 17, 1997 without being
exercised.

NOTE 14 - DIVIDEND RESTRICTIONS:

Banking  regulations  limit the amount of dividends that may be paid by The Bank
without prior regulatory  approval.  At December 31, 1997, The Bank had retained
earnings of approximately $2,071,000 available for the payment of dividends.




                                       31
<PAGE>

NOTE 15 - REGULATORY MATTERS:

The Bank is subject to various regulatory capital  requirements  administered by
federal  banking  agencies.  Failure to meet minimum  capital  requirements  can
initiate certain mandatory - and possibly  additional  discretionary  actions by
regulators  that,  if  undertaken,  could have a direct  material  effect on The
Bank's  financial   statements.   Under  capital  adequacy  guidelines  and  the
regulatory  framework for prompt corrective  action, The Bank must meet specific
capital  guidelines  that involve  quantitative  measures of The Bank's  assets,
liabilities,  and certain off-balance-sheet items as calculated under regulatory
accounting  practices.  The Bank's capital amounts and  classification  are also
subject to  qualitative  judgments  by the  regulators  about  components,  risk
weightings, and other factors.

Quantitative  measures  established  by  regulation to ensure  capital  adequacy
require The Bank to maintain  minimum amounts and ratios (set forth in the table
below)  of  Total  and  Tier  I  Capital  (as  defined  in the  regulations)  to
risk-weighted assets (as defined), and of Tier 1 Capital (as defined) to average
assets (as defined). Management believes, as of December 31, 1997, that The Bank
meets all capital adequacy requirements to which it is subject.

The most recent  notification from the Board of Governors of the Federal Reserve
System  categorized The Bank as well capitalized under the regulatory  framework
for prompt corrective  action.  To be categorized as well capitalized,  The Bank
must maintain minimum total risk-based,  Tier I risk-based,  and Tier I leverage
ratios as set forth in the table.  There are no  conditions or events since that
notification that management believes have changed The Bank's category.

The Bank's actual capital amounts and ratios are also presented in the table.

<TABLE>
<CAPTION>
<S> <C>
                                                                                                      To Be Well
                                                                                                   Capitalized Under
                                                                             For Capital           Prompt Corrective
                                                        Actual            Adequacy Purposes        Action Provisions
                                                 --------------------     ------------------      --------------------
                                                    Amount      Ratio       Amount     Ratio        Amount       Ratio
As of December 31, 1997:                         ----------     -----     ----------   -----      ----------     -----
    Total Capital (to Risk-Weighted Assets)      $8,270,000     17.72%   >$3,733,000  >8.00%     >$4,666,000    >10.00%
                                                                         -            -          -              -
    Tier I Capital (to Risk-Weighted Assets)      7,687,000     16.47%   > 1,866,000  >4.00%     > 2,800,000    > 6.00%
                                                                         -            -          -              -
    Tier I Capital (to Risk-Average Assets)       7,687,000     10.71%   > 2,871,000  >4.00%     > 3,589,000    > 5.00%
                                                                         -            -          -              -


As of December 31, 1996:
    Total Capital (to Risk-Weighted Assets)      $7,497,000     15.97%   >$3,756,000  >8.00%     >$4,695,000    >10.00%
                                                                         -            -          -              -
    Tier I Capital (to Risk-Weighted Assets)      6,910,000     14.72%   > 1,878,000  >4.00%     > 2,817,000    > 6.00%
                                                                         -            -          -              -
    Tier I Capital (to Risk-Average Assets)       6,910,000      9.90%   > 2,792,320  >4.00%     > 3,490,400    > 5.00%
                                                                         -            -          -              -
</TABLE>





                                       32
<PAGE>


NOTE 16 - SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:

                                                    Year Ended     Year Ended
                                                    December 31,   December 31,
                                                        1997           1996
                                                    -----------    -----------
    Cash paid for:
      Interest on deposits                          $ 1,888,396    $ 1,891,446
      Interest on borrowed funds                        373,549        301,015
      Income taxes                                      421,008        675,398
    Transfer from loans to foreclosed real estate             -         89,286


NOTE 17 - SUBSEQUENT EVENT (UNAUDITED):

On March 11, 1998,  Ballston entered into the Agreement and Plan of Merger,  and
the related Plan of Merger  (collectively,  the "Merger Agreement")  pursuant to
which Ballston will be merged (the "Merger") with and into MainStreet  BankGroup
Incorporated  ("MSBC").  Under the terms of the Merger Agreement,  each share of
common stock, par value $0.20 per share, of Ballston will be converted into that
portion  of a share  of MSBC  common  stock  having a  market  value of  $12.04,
provided  that a minimum of 0.4025  share and a maximum of 0.4920  share of MSBC
common stock will be issued for each share of Ballston common stock.

Consummation  of the Merger is subject,  among other things,  to the approval of
the Merger  Agreement by the  requisite  vote of Ballston  shareholders  and the
receipt  of  all  requisite  regulatory  approvals  and  satisfaction  of  other
conditions contained in the Merger Agreement.  It is anticipated that the Merger
will be  accounted  for as a  pooling  of  interests  under  generally  accepted
accounting principles.

In connection with the Merger Agreement,  MSBC and Ballston entered into a Stock
Option  Agreement,  dated as of March 11,  1998 (the  "Option  Agreement").  The
Option  Agreement  provides  that MSBC shall have the option to  purchase  up to
322,275 of the authorized,  but unissued, shares of Ballston's common stock at a
price of $8.64 per share, only upon the occurrence of certain specified events.

Ballston has agreed to pay a transaction fee in connection with the Merger to an
investment  banking firm. Under the terms of the agreement,  the fee is equal to
0.5% of the aggregate  transaction  price.  A substantial  portion of the fee is
contingent upon the consummation of the Merger.




<PAGE>
                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20.  Indemnification of Officers and Directors

         MSBC's Articles of Incorporation  implement the provisions of the VSCA,
which  provide for the  indemnification  of MSBC's  directors  and officers in a
variety of  circumstances,  which may include  indemnification  for  liabilities
under the Securities  Act.  Under sections  13.1-697 and 13.1-702 of the VSCA, a
Virginia  corporation  generally is  authorized  to indemnify  its directors and
officers in civil or criminal  actions if they acted in good faith and  believed
their conduct to be in the best interests of the corporation and, in the case of
criminal  actions,  had no  reasonable  cause to believe  that the  conduct  was
unlawful.  MSBC's Articles of Incorporation require indemnification of directors
and officers  with respect to certain  liabilities,  expenses and other  amounts
imposed upon them be reason of having been a director or officer,  except in the
case of willful  misconduct  or a knowing  violation of criminal  law. MSBC also
carries insurance on behalf of directors, officers, employees or agents that may
cover  liabilities  under the Securities  Act. In addition,  the VSCA and MSBC's
Articles of  Incorporation  eliminate  the liability of a director or officer of
MSBC in a shareholder or derivative  proceeding.  This  elimination of liability
will not apply in the event of willful  misconduct or a knowing violation of the
criminal law or any federal or state  securities  law.  Sections  13.1-692.1 and
13.1-696 to -704 of the VSCA are hereby incorporated herein by reference.

Item 21.  Exhibits and Financial Statement Schedules

(a)       Exhibits

2(a)      Agreement and Plan of Merger dated as of March 11, 1998,  between MSBC
          and    Ballston    (attached    as    Appendix    I   to   the   Proxy
          Statement/Prospectus, filed as part of this registration statement.)

3(i)      Articles of Incorporation of MSBC (incorporated herein by reference to
          Form 8-A filed electronically on March 18, 1996, file No. 0-08622)

3(ii)     Bylaws of MSBC  (incorporated  herein by  reference to Form 10-K (file
          No.: 0-08622) filed electronically on March 26, 1998)

4         MSBC Preferred  Share Rights Plan  (incorporated  by reference to Form
          8-K, dated January 18, 1990).

5         Opinion and consent of Flippin,  Densmore, Morse, Rutherford & Jessee,
          A Professional Corporation

8         Opinion and consent of Flippin,  Densmore, Morse, Rutherford & Jessee,
          A Professional  Corporation, with respect to tax  consequences  of the
          Merger

10 (iii)(b)(6)

         1.       Material  Contracts  of MSBC for Michael R.  Brenan,  James E.
                  Adams and Rebecca J.  Jenkins  (incorporated  by  reference to
                  Registrant's  Form 10-K for the fiscal year ended December 31,
                  1997)

                                      II-1
<PAGE>



         2.       Material  Contracts  of MSBC for S.  Richard  Bagby,  James H.
                  Campbell, William S. Clark, James W. Clement, Larry A. Heaton,
                  William D. Kerr, Kenneth E. Lust, Reba H. Mandeville,  John D.
                  Meade,  III, Beverly L. Mitchell,  William O. Turner, R. Bruce
                  Valley,  Mark J.  Wenick  and John L. Wynne  (incorporated  by
                  reference to Registrant's  Form 10-K for the fiscal year ended
                  December 31, 1997).

21        Statement of subsidiaries of MSBC (incorporated herein by reference to
          Registrant's Form 10-K for the fiscal year ended December 31, 1997)

23(a)     Consent of Coopers & Lybrand L.L.P.

23(b)     Consent of Stoy, Malone & Company, P.C.

23(c)     Consent of Danielson Associates Inc.

23(d)     Consent of Flippin,  Densmore, Morse, Rutherford & Jessee (included in
          Exhibit 5)

23(e)     Consent of Flippin,  Densmore, Morse, Rutherford & Jessee (included in
          Exhibit 8)

24        Power of Attorney of Officers and Directors of MSBC

99(a)     Form of Proxy of Ballston Bancorp, Inc.

  (b)     Report, Opinion or Appraisal -- (Opinion of Danielson  Associates Inc.
          attached as Appendix  II to the Proxy  Statement/Prospectus,  filed as
          part of this registration statement)

Item 22. Undertakings

     (a) The undersigned Registrant hereby undertakes:

         (1)      To file,  during any period in which offers or sales are being
                  made,  a   post-effective   amendment  to  this   registration
                  statement:

                  (i)      To  include  any   prospectus   required  by  Section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     To  reflect  in the  prospectus  any  facts or events
                           arising after the effective date of the  registration
                           statement   (or  the   most   recent   post-effective
                           amendment  thereof)  which,  individually  or in  the
                           aggregate,  represent  a  fundamental  change  in the
                           information set forth in the registration statement;

                  (iii)    To include any material  information  with respect to
                           the plan of distribution not previously  disclosed in
                           the registration  statement or any material change to
                           such information in the registration statement.

         (2)      That for the purpose of  determining  any liability  under the
                  Securities  Act of 1933,  each such  post-effective  amendment
                  shall be deemed to be a new registration statement relating to
                  the  securities  offered  therein,  and the  offering  of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

         (3)      To  remove  from  registration  by means  of a  post-effective
                  amendment any of the securities  being registered which remain
                  unsold at the termination of the offering.


                                      II-2
<PAGE>

     (b) The registrant hereby undertakes:

         (1)      Insofar as indemnification  for liabilities  arising under the
                  Securities Act of 1933 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  or
                  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 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.

         (2)      The  undersigned  Registrant  hereby  undertakes to respond to
                  requests for  information  that is  incorporated  by reference
                  into the prospectus  pursuant to Items 4, 10(b),  11, or 13 of
                  this form, within one business day of receipt of such request,
                  and to send the incorporated  documents by first-class mail or
                  other  equally   prompt  means.   This  includes   information
                  contained in documents filed  subsequent to the effective date
                  of the registration  statement  through the date of responding
                  to the request.

         (3)      The  undersigned  registrant  hereby  undertakes  to supply by
                  means of a post-effective amendment all information concerning
                  a  transaction,  and Ballston  Bancorp,  Inc.  being  acquired
                  involved therein,  that was not the subject of and included in
                  the registration statement when it became effective.

         (4)      The  undersigned   registrant   hereby  undertakes  that,  for
                  purposes of determining any liability under the Securities Act
                  of  1933,  each  filing  of  the  registrant's  annual  report
                  pursuant to section 13(a) or section  15(d) of the  Securities
                  Exchange Act of 1934 (and, where applicable, each filing of an
                  employee  benefit  plan's  annual  report  pursuant to section
                  15(d)  of  the  Securities  Exchange  Act  of  1934)  that  is
                  incorporated by reference in the registration  statement shall
                  be deemed to be a new registration  statement  relating to the
                  securities   offered   therein,   and  the  offering  of  such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant  has duly  caused  this  registration  statement  to be signed on its
behalf  by  the  undersigned,   thereunto  duly  authorized,   in  the  City  of
Martinsville, Commonwealth of Virginia, on May 27, 1998.

                                   MAINSTREET BANKGROUP INCORPORATED
                                   (Registrant)

                                   By:   /s/  Michael R. Brenan
                                         ----------------------------------
                                   Michael R. Brenan, President, Chairman of the
                                   Board and Chief Executive Officer

Pursuant to the  requirements of the Securities Act of 1933,  this  registration
statement has been signed by the following  persons in the capacities  indicated
on May 27, 1998.

                                      II-3
<PAGE>
<TABLE>
<CAPTION>
Signature                                       Title
<S> <C>
/s/ Michael R. Brenan                           President, Chairman of the Board and Chief
- ------------------------------------            Executive Officer
Michael R. Brenan                               (Principal Executive Officer)

/s/  James E. Adams                             Executive Vice President, Chief Financial
- ------------------------------------            Officer and Treasurer (Principal Financial
James E. Adams                                  and Accounting Officer)

/s/  W. Christopher Beeler, Jr.                 Director*
- ------------------------------------
W. Christopher Beeler, Jr.

/s/  William L. Cooper, III                     Director*
- -------------------------------------
William L. Cooper, III

/s/  Billy P. Craft                             Director*
- -------------------------------------
Billy P. Craft

/s/  I. Patricia Henry                          Director*
- -------------------------------------
I. Patricia Henry

/s/  Larry E. Hutchens                          Director*
- -------------------------------------
Larry E. Hutchens

/s/  William O. McCabe, Jr., MD                 Director*
- -------------------------------------
William O. McCabe, Jr., MD

/s/  Albert L. Prillaman                        Director*
- -------------------------------------
Albert L. Prillaman

/s/  Phillip W. Dean                            Director*
- -------------------------------------
Phillip W. Dean

/s/  Alfred J. T. Byrne                         Director*
- -------------------------------------
Alfred J. T. Byrne

/s/  C. Leland Bassett                          Director*
- -------------------------------------
C. Leland Bassett

</TABLE>

                                      II-4
<PAGE>

*By Rebecca J. Jenkins, Attorney-in-Fact

/s/  Rebecca J. Jenkins
- -------------------------------------
Rebecca J. Jenkins
Date:  May 27, 1998


                                      II-5


                                                            Exhibits 5 and 23(d)

Flippin, Densmore, Morse, Rutherford & Jessee, A Professional Corporation
300 First Campbell Square
Roanoke, Virginia  24011
(540) 510-3000

                                  May 27, 1998

Board of Directors
MainStreet BankGroup Incorporated
200 East Church Street
Martinsville, Virginia  24112

                  MainStreet BankGroup Incorporated
                  Registration Statement on Form S-4

Ladies and Gentlemen:

         We are acting as  counsel to  MainStreet  BankGroup  Incorporated  (the
"Company") in connection with the registration  under the Securities Act of 1933
of 796,781 shares of its common stock ("Common  Stock") pursuant to that certain
Agreement  and Plan of Merger  dated  March 11,  1998 (the  "Merger  Agreement")
between the Company and Ballston Bancorp, Inc. ("Ballston").  The transaction in
which the Common Stock will be issued is described in the Company's Registration
Statement  on Form S-4 filed with the  Securities  and Exchange  Commission  and
relating to the Company's acquisition of Ballston. In connection with the filing
of the Registration  Statement you have requested our opinion concerning certain
corporate matters.

         In rendering this opinion, we have relied upon, among other things, our
examination of such records of the Company and  certificates of its officers and
of public officials as we have deemed necessary.

         Based upon the foregoing, we are of the opinion that:

         1. The Company is a corporation duly incorporated, validly existing and
in good standing under the laws of the Commonwealth of Virginia.

         2. The Common Stock has been duly authorized and, when shares of Common
Stock have been issued as described in the Registration Statement,  they will be
legally issued, fully paid and nonassessable.

         We consent  to the filing of this  opinion  with the  Commission  as an
exhibit  to  the  Registration  Statement  and to  the  references  to us in the
Prospectus included therein.

                                Very truly yours,



                                FLIPPIN, DENSMORE, MORSE,
                                   RUTHERFORD & JESSEE,
                                   A PROFESSIONAL CORPORATION






                                                             Exhibit 8 and 23(e)



                                  May 27, 1998


Ballston Bancorp, Inc.
1667 K Street, N.W., Suite 700
Washington, DC  20006

MainStreet BankGroup Incorporated
200 E. Church Street
Martinsville, VA  24112-5409

         Re:     Opinion with Respect to Certain Federal Income Tax Consequences
                 of the Merger of Ballston Bancorp, Inc. into MainStreet
                 BankGroup Incorporated

Gentlemen:

         You have  requested  our  opinion  as to  certain  federal  income  tax
consequences  of the  proposed  merger of  Ballston  Bancorp,  Inc.,  a Delaware
corporation  ("Ballston"),  with and into MainStreet BankGroup  Incorporated,  a
Virginia corporation  ("MainStreet") pursuant to an Agreement and Plan of Merger
dated  as of  March  11,  1998  by and  between  MainStreet  and  Ballston  (the
"Agreement").

         Pursuant to the Agreement and the Plan of Merger (the "Plan")  attached
as Annex 1 to Exhibit A to the  Agreement,  and  subject  to various  regulatory
approvals,  Ballston will be merged with and into  MainStreet in accordance with
the  provisions  of,  and  with the  effect  provided  in,  the  Virginia  Stock
Corporation  Act (the  "Merger").  As a result of the  Merger,  MainStreet  will
become the parent holding company of The Bank of Northern Virginia,  the banking
subsidiary of Ballston, as well as MainStreet's current subsidiary banks, all of
which will continue to conduct their businesses in substantially the same manner
as prior to the Merger. At the effective date of the Merger, and pursuant to the
Plan, each share of common stock of Ballston  ("Ballston  Common Stock") will be
exchanged  for and  converted  into that  number  of  shares of common  stock of
MainStreet ("MainStreet Common Stock") having an aggregate market value equal to
$12.04 as  determined  pursuant to the  Agreement,  plus cash in lieu of issuing
fractional shares of MainStreet Common Stock.

         In connection  with the  preparation of this opinion,  we have examined
such documents concerning the Merger as we have deemed necessary.  We have based
our  conclusions  on the  Internal  Revenue  Code of 1986 (the  "Code")  and the
regulations  promulgated pursuant thereto, each as amended from time to time and
in effect as of the date hereof, as well as existing judicial and administrative
interpretations  thereof.  As to  various  questions  of  fact  material  to our
opinion, we have relied upon the  representations  made in the Agreement as well
as the  additional  representations  made to us by duly  authorized  officers of
MainStreet and Ballston set forth below.

         In  connection  with the  proposed  Merger,  the  following  additional
representations  have been made to us by duly authorized  officers of MainStreet
and Ballston and relied upon by us in the preparation of this opinion:

         A. The fair  market  value  of  MainStreet  Common  Stock  received  by
Ballston  shareholders  will be approximately  equal to the fair market value of
Ballston Common Stock surrendered in exchange  therefor,  and the exchange ratio
used in such exchange is the result of arm's length negotiations.

         B. MainStreet has no plan or intention to sell or otherwise  dispose of
any of the assets of Ballston to be  transferred  to  MainStreet  in the Merger,
except for  dispositions  made in the  ordinary  course of business or transfers
described in Section 368(a)(2)(C) of the Code.

         C. MainStreet,  Ballston and Ballston's shareholders will each will pay
their own expenses, if any, incurred in connection with the Merger.

         D. Following the Merger, MainStreet will continue the historic business
of Ballston or use a significant  portion of Ballston's historic business assets
in a business.  Following the Merger,  The Bank of Northern Virginia or a member
of MainStreet's  "qualified group" (as defined in Regulation  1.368-1(d)(4)(ii))
will  continue  The  Bank of  Northern  Virginia's  historic  business  or use a
significant  portion of The Bank of Northern Virginia's historic business assets
in a business.

         E. Neither  MainStreet nor any person related to MainStreet (as defined
in  Regulation  1.368-1(e)(3))  has any plan or intention to redeem or reacquire
any of its stock to be issued in the Merger.

         F. The  liabilities of Ballston that will be assumed by MainStreet as a
result of the Merger and the liabilities to which Ballston's  assets are subject
were incurred in the ordinary course of business.

         G. There is no intercorporate  indebtedness existing between MainStreet
and Ballston that was issued, acquired or will be settled at a discount.

         H. On the  effective  date of the Merger,  the fair market value of the
assets of Ballston  transferred to MainStreet in the Merger will equal or exceed
the sum of  Ballston's  liabilities  assumed  by  MainStreet  plus the amount of
liabilities to which the Ballston assets are subject.

         I.  None of the  shares of  MainStreet  Common  Stock,  cash in lieu of
fractional  shares or other  property  received by any  shareholder-employee  in
exchange for  Ballston  Common Stock  pursuant to the Merger  constitutes  or is
intended as  compensation  for services  rendered,  nor is  considered  separate
consideration  for, or allocable to, any employment  agreement or  relationship.
None of the compensation to be received by any  shareholder-employee of Ballston
after the effective  date of the Merger will be separate  consideration  for, or
allocable  to, any of such  shareholder-employee's  Ballston  Common  Stock.  In
addition,  any compensation  paid to any  shareholder-employee  of Ballston will
constitute and be intended as compensation  for services  actually  rendered and
bargained for at arm's  length,  and will be  commensurate  with amounts paid to
third parties bargaining at arm's length for similar services.

         J. No two parties to the Merger are investment  companies as defined in
Section 368(a)(2)(F)(iii) and (iv) of the Code.

         K. Ballston is not under the  jurisdiction  of a court in a Title 11 or
similar case within the meaning of Section 368(a)(3)(A) of the Code.

         L. Cash paid to  Ballston  shareholders  in lieu of issuing  fractional
shares of  MainStreet  Common  Stock  will be paid  solely  for the  purpose  of
avoiding  the expense and  administrative  inconvenience  of issuing  fractional
shares,  will not be separately  bargained for  consideration and will represent
only a  mechanical  rounding  off of the number of shares of  MainStreet  Common
Stock to be issued to Ballston  shareholders.  The total cash consideration that
will  be  paid  in the  Merger  to  Ballston  shareholders  instead  of  issuing
fractional  shares of MainStreet Common Stock will not exceed one percent of the
total  consideration that will be issued in the Merger to Ballston  shareholders
in exchange for their shares of Ballston  Common  Stock.  The  fractional  share
interests  of each  Ballston  shareholder  will be  aggregated,  and no Ballston
shareholder will receive cash in an amount equal to or greater than the value of
one full share of MainStreet Common Stock.

         Based  upon the  foregoing  and  subject to the  limitations  expressed
herein, we are of the opinion that for federal income tax purposes:

         1. The Merger will constitute a "reorganization"  within the meaning of
Section  368(a) of the Code.  Ballston  and  MainStreet  will each  qualify as a
"party to a reorganization" within the meaning of Section 368(b) of the Code.

         2. No gain or loss will be  recognized  by  MainStreet or Ballston as a
result of the Merger.

         3. No gain or loss will be  recognized  by Ballston  shareholders  as a
result of the exchange of Ballston  Common Stock  solely for  MainStreet  Common
Stock (including any fractional share interest)  pursuant to the Merger,  except
that gain or loss will be recognized on the receipt of cash, if any, received in
lieu of a fractional share of MainStreet Common Stock.

         4. Cash  received  by a Ballston  shareholder  in lieu of a  fractional
share of MainStreet Common Stock will be treated as having been received as full
payment in exchange for such fractional  share pursuant to Section 302(a) of the
Code.  Such  shareholder  will  recognize  gain or loss equal to the  difference
between  the  amount  of cash  received  and  the  shareholder's  basis  in that
fractional  share,  and such  gain or loss will be  capital  gain or loss if the
fractional  share  would  have  been  a  capital  asset  in  the  hands  of  the
shareholder.

         5. A  dissenting  Ballston  shareholder  who  receives  solely  cash in
exchange  for  his  Ballston  Common  Stock  will  be  treated  as  receiving  a
distribution  in  redemption  of  his  Ballston  Common  Stock,  subject  to the
provisions and limitations of Section 302 of the Code.

         6. The  aggregate  tax  basis of  shares  of  MainStreet  Common  Stock
(including any  fractional  share  interest)  received in the Merger by Ballston
shareholders  who  exchange  their  Ballston  Common  Stock solely for shares of
MainStreet  Common Stock will be the same as the aggregate tax basis of Ballston
Common Stock surrendered in exchange therefor.

         7. The holding  period of MainStreet  Common Stock received by Ballston
shareholders  will  include  the  period  during  which  Ballston  Common  Stock
surrendered  in  exchange  therefor  was  held  by such  Ballston  shareholders,
provided  the Ballston  Common Stock was held as a capital  asset on the date of
the exchange.

         This opinion is based upon the  provisions of the Code, as  interpreted
by regulations,  administrative  rulings,  and case law, all in effect as of the
date hereof and all of which are subject to change or differing interpretations,
which changes or interpretations  may be retroactively  applied. A change in the
authorities upon which our opinion is based could affect our  conclusions.  This
opinion is not binding upon the Internal Revenue  Service,  any tax authority or
any court. No assurance can be given that a position  contrary to that expressed
herein  will not be asserted by the  Internal  Revenue  Service or any other tax
authority.  Our opinion is limited to certain Federal income tax consequences of
the Merger set forth  herein.  This opinion may not be  applicable to holders of
Ballston Common Stock that are not citizens or residents of the United States or
to holders of options or warrants,  nor does this opinion  address the effect of
any applicable foreign, state, local or other tax laws.



<PAGE>


         This opinion is provided in  connection  with the Merger as required by
Section  VI(M) of the  Agreement,  is  solely  for the  benefit  of  MainStreet,
Ballston  and  Ballston  shareholders,  and may not be relied  upon in any other
manner or by any other  person.  This  opinion may not be disclosed to any other
person or used in any other  manner  without  the prior  written  consent of the
undersigned.  We  consent  to the  filing of this  opinion  as an exhibit to the
Registration Statement.

                            Very truly yours

                            FLIPPIN, DENSMORE, MORSE
                             RUTHERFORD & JESSEE,
                             A PROFESSIONAL CORPORATION






                                                                   Exhibit 23(a)

                       CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the incorporation by reference in this  registration  statement of
MainStreet  BankGroup  Incorporated  on Form S-4 of our report dated January 16,
1998 on our  audits  of the  consolidated  financial  statements  of  MainStreet
BankGroup  Incorporated  as of December  31, 1997 and 1996,  and for each of the
years in the three year period ended December 31, 1997, which report is included
in the Annual Report on Form 10-K for the year ended December 31, 1997, which is
incorporated  by  reference.  We also consent to the reference to our firm under
the caption "Experts."

                            COOPERS & LYBRAND L.L.P.

Greensboro, North Carolina
May 26, 1998




                                                                   Exhibit 23(b)

                          INDEPENDENT AUDITORS' CONSENT




We consent to the use in this  Registration  Statement of  MainStreet  BankGroup
Incorporated  on  Form  S-4  of  our  report  dated  January  26,  1998,  on the
consolidated  financial statements of Ballston Bancorp,  Inc. and Subsidiary for
the  years  ended   December   31,  1997  and  1996,   appearing  in  the  Proxy
Statement/Prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the heading "Experts" in such Proxy
Statement/Prospectus.


STOY, MALONE & COMPANY, P.C.


Bethesda, Maryland
May 27, 1998







                                                                   Exhibit 23(c)

                       [Daniel Associates Inc. Letterhead]

                      CONSENT OF DANIELSON ASSOCIATES INC.


         We hereby  consent to the  reference in the Proxy  Statement/Prospectus
forming  a part  of  this  Registration  Statement  on  Form  S-4 of  MainStreet
BankGroup  Incorporated  to our opinion,  dated March 11, 1998, and to our firm,
respectively,  and to the  inclusion  of such  opinion  as an annex to the Proxy
Statement/Prospectus.

                            DANIELSON ASSOCIATES INC.


                            By /s/Arnold G. Danielson
                               ---------------------------------
                               Arnold G. Danielson
                               Chairman

Rockville, Maryland
May 27, 1998





                                                                      Exhibit 24

                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS,  that each of the undersigned  officers
and/or directors of MainStreet  BankGroup  Incorporated,  a Virginia corporation
(the "Corporation"), does hereby constitute and appoint Michael R. Brenan, James
E. Adams and  Rebecca J.  Jenkins,  and each of them (with full power to each of
them to act alone), his true and lawful Attorneys in Fact and Agents for him and
on his behalf  and in his name,  place and stead in any and all  capacities  and
particularly as an officer and/or  director of the Corporation to sign,  execute
and affix  his seal  thereto  and file any of the  documents  referred  to below
relating to the registration in connection with the Agreement and Plan of Merger
dated as of March 11, 1998, by and among the Corporation  and Ballston  Bancorp,
Inc., a Virginia corporation, shares of its Common Stock and make changes to any
of the documents  referred to below and generally to do all such things in their
behalf in their  capacities  as  officers  and  directors  to enable  MainStreet
BankGroup  Incorporated  to comply with the  provisions of the Securities Act of
1933 and all requirements of the Securities and Exchange Commission.

         A  Registration  Statement  of the  Corporation  respecting  shares  of
Corporation  Common Stock,  on Form S-4,  under the  Securities  Act of 1933, as
amended,  and any and all amendments to the  Registration  Statement,  including
post-effective amendments,  with all exhibits and any and all documents required
to be filed with respect  thereto with the  Securities  and Exchange  Commission
and/or any regulatory authority for any State in the United States of America.

         WITNESS the  signatures and seals of the  undersigned  this 29th day of
April, 1998.


                          /s/ James E. Adams                           (SEAL)
                          James E. Adams


                          /s/  W. Christopher Beeler, Jr.              (SEAL)
                          W. Christopher Beeler, Jr.


                          /s/  Michael R. Brenan                       (SEAL)
                          Michael R. Brenan


                          /s/  William L. Cooper, III                  (SEAL)
                          William L. Cooper, III


                          /s/  Billy P. Craft                          (SEAL)
                          Billy P. Craft


                          /s/  Phillip W. Dean                         (SEAL)
                          Phillip W. Dean


                          /s/  I. Patricia Henry                       (SEAL)
                          I. Patricia Henry


                          /s/  Larry E. Hutchens                       (SEAL)
                          Larry E. Hutchens


                          /s/  Dr. William O. McCabe, Jr.              (SEAL)
                          Dr. William O. McCabe, Jr.


                          /s/  Albert L. Prillaman                     (SEAL)
                          Albert L. Prillaman


                          /s/  Alfred J. T. Byrne                      (SEAL)
                          Alfred J. T. Byrne


                          /s/  C. Leland Bassett                       (SEAL)
                          C. Leland Bassett


COMMONWEALTH OF VIRGINIA                             )
                                                     )    to-wit:
CITY OF MARTINSVILLE                                 )


         I,  Gayle  F.  Gilley,   a  Notary  Public  in  and  for  the  City  of
Martinsville,  in the State of Virginia,  do hereby certify that James E. Adams,
W. Christopher Beeler, Jr., Michael R. Brenan,  William L. Cooper, III, Billy P.
Craft,  Phillip W. Dean, I. Patricia  Henry,  Larry E. Hutchens,  Dr. William O.
McCabe, Jr., Albert L. Prillaman, Alfred J. T. Byrne and C. Leland Bassett whose
names are signed to the  foregoing  writing  bearing date the 29th day of April,
1998,  this day personally  appeared before me and  acknowledged  the same in my
City and State aforesaid.

         GIVEN under my hand and seal this 29th day of April, 1998.


                               /s/ Gayle F. Gilley
                               Notary Public

My Commission Expires:
12/31/2000



                                                                   Exhibit 99(a)

                                 REVOCABLE PROXY



                             Ballston Bancorp, Inc.
                         1667 K Street, N.W., Suite 700
                             Washington, D.C., 20006



           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

The  undersigned  hereby  appoints , with full power of  substitution  to act as
proxy for the  undersigned  to vote all the shares of common  stock of  Ballston
Bancorp,  Inc. ("Ballston Common Stock") which the undersigned would be entitled
to vote at the  Annual  Meeting of  Shareholders  to be held , , 1998 at : p.m.,
local time at The Bank of Northern Virginia,  1010 North Glebe Road,  Arlington,
Virginia.

THIS  SIGNED  PROXY  WILL BE  VOTED  AS  DIRECTED,  BUT IF NO  INSTRUCTIONS  ARE
SPECIFIED,  THIS SIGNED PROXY WILL BE VOTED FOR EACH OF THE PROPOSALS STATED. IF
ANY OTHER  BUSINESS  IS  PRESENTED  AT THE  ANNUAL  MEETING,  INCLUDING  MATTERS
RELATING TO THE CONDUCT OF THE ANNUAL  MEETING,  THIS SIGNED PROXY WILL BE VOTED
BY SUCH PERSON NAMED IN THIS PROXY IN HIS BEST  JUDGMENT.  AT THE PRESENT  TIME,
THE BOARD OF DIRECTORS  KNOWS OF NO OTHER BUSINESS TO BE PRESENTED AT THE ANNUAL
MEETING.

The undersigned hereby revokes any and all proxies heretofore given with respect
to the undersigned's shares of Ballston Common Stock.

                   THIS PROXY IS CONTINUED ON THE REVERSE SIDE
               PLEASE COMPLETE, DATE AND SIGN ON THE REVERSE SIDE
                            AND RETURN PROXY PROMPTLY


1. To approve the Agreement and Plan of Merger,  dated as of March 11, 1998, and
the related Plan of Merger  (collectively,  the "Merger Agreement")  pursuant to
which Ballston will be merged (the "Merger") with and into MainStreet  BankGroup
Incorporated  ("MSBC").  Under the terms of the Merger Agreement,  each share of
common stock, par value $0.20 per share, of Ballston will be converted into that
fraction  of a share of MSBC  common  stock  having a  market  value of  $12.04,
provided  that a minimum of 0.4025 shares and a maximum of 0.4920 shares of MSBC
common stock will be issued for each share of Ballston  common stock.  Cash will
be paid in lieu of issuance of fractional shares.

                      FOR                AGAINST               ABSTAIN
          
                      ----                ----                   ----


2. To elect the directors to serve until the 1999 Annual Meeting of Shareholders
or their  successors  have been elected and qualified or, if earlier,  until the
consummation of the Merger (mark only one).
<TABLE>
<S> <C>
                                                             FOR                           WITHHELD
                                                 (all nominees listed below       (all nominees listed below)
                                                  except as directed to the
                                                      contrary below)
Mary E. Fricano                                             ____                               ____
Kenneth M. Haggerty, D.D.S.                                 ____                               ____
Robert F. Kelleher                                          ____                               ____
John E. Kilcarr                                             ____                               ____
Helena B. Metzger                                           ____                               ____
Paul A. Owens                                               ____                               ____
Edward D. Soma, M.D.                                        ____                               ____
</TABLE>

(Instruction:  To withhold authority to vote for any individual  nominee,  write
that nominee's name on the space provided below)



3. To ratify  the  appointment  of Stoy,  Malone &  Company,  P.C.,  to serve as
independent  auditors of Ballston  for the fiscal year ending  December 31, 1998
or, if earlier, until consummation of the Merger.

                      FOR                AGAINST               ABSTAIN
          
                      ----                ----                   ----

[  ]  Please mark this box if you plan to attend the Annual Meeting.

Please  mark,  date and sign your name as it  appears  hereon  and return in the
enclosed envelope. When signing as an agent, attorney, executor,  administrator,
trustee,  or guardian,  please give title as such.  If signer is a  corporation,
please sign full corporate name by authorized officer and attach corporate seal.
For joint account, each joint owner should sign.

Date ______________________, 1998

SIGNATURE ______________________________

SIGNATURE ______________________________



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