[GRAPHIC  OMITTED:  Two brown paper  grocery bags sit side by side. On the left,
                    the  "Cohoes/Hudson" bag is stuffed to overflowing with ten-
                    and   twenty-dollar  bills;  on  the  right,  the   crumpled
                    "TrustCo" bag has a hole in one corner, with pennies leaking
                    out.]

To our valued shareholders :

TrustCo is trying to scuttle our merger and convince  you to sell to them.  They
would  pay for your  stock in  Cohoes  and  Hudson  River  with  shares of their
overvalued  stock.  TrustCo(1)s  stock price has declined 15% since December 31,
1998, and we believe it is still overvalued.

                  It's important for your financial well being
               that you understand the RISKS in TrustCo(1)s plan!

                      LET'S DO SOME "COMPARISON" SHOPPING!

                Cohoes-Hudson Bancorp's             TrustCo's Pro Forma
                Pro Forma Book Value per Share      Book Value per Share
- --------------------------------------------------------------------------------
Book Value               $11.56                             $6.13
- --------------------------------------------------------------------------------

The  difference  in value is  overwhelming!  Your  strategy  may be to sell your
TrustCo shares right after you get them!

                          YOU...AND HOW MANY OTHERS???

We believe other shareholders like you may have the same strategy.  However,  to
pay you TrustCo will have to issue over 25 million shares of their stock,  added
to the over 50 million shares already outstanding.  On average, less than 45,000
shares of TrustCo trade per day and IF other shareholders also plan to sell...

                     ...WHAT WILL YOU GET FOR YOUR SHARES???

The selling  pressure of so MANY  shareholders  selling at once, we think,  will
SIGNIFICANTLY  reduce  the  value of  TrustCo  shares.  Also  keep in mind  that
TrustCo's  pro forma  earnings per share will  decrease by 14%  according to its
prospectus.

Don't make the mistake of voting  against our merger.  We are confident that our
combined  banks will be worth far more  together than  TrustCo's  offer and more
than either of us is worth independently.  We urge you to vote for our merger on
our WHITE proxy card.

We urge everyone to become as informed as possible about the FACTS.  Please call
us if you would like more information.

 Yours truly,

   /s/ Harry L. Robinson                    /s/ Carl A. Florio
 -------------------------------------    ----------------------------------
 Harry L. Robinson, President & CEO       Carl A. Florio, President & CEO
 (518) 233-6565                           (518) 828-4600

 [LOGO OF COHOES BANCORP, INC.]           [LOGO OF HUDSON RIVER BANCORP, INC.]

         This letter may contain  forward-looking  statements within the meaning
of the Private  Securities  Litigation  Reform Act of 1995 that involve risk and
uncertainty.  It  should be noted  that a variety  of  factors  could  cause the
combined company(1)s actual results and experience to differ materially from the
anticipated results or expectations expressed in the forward-looking statements.

         The  risks  and   uncertainties   that  may  affect   the   operations,
performance,  development,  growth  projections  and  results  of  the  combined
company(1)s business include, but are not limited to, the growth of the economy,
interest  rate  movements,   timely  development  by  the  combined  company  of
technology  enhancements for its products and operating  systems,  the impact of
competitive  products,   services  and  pricing,  customer  based  requirements,
Congressional legislation, acquisition cost savings and revenue enhancements and
similar  matters.   Readers  are  cautioned  not  to  place  undue  reliance  on
forward-looking  statements  which are  subject to  influence  by the named risk
factors and unanticipated future events. Actual results, accordingly, may differ
materially from management expectations.

         We do not  undertake,  and  specifically  disclaim,  any  obligation to
publicly  release  the  results  of  any  revisions  which  may be  made  to any
forward-looking   statements  to  reflect  the   occurrence  of  anticipated  or
unanticipated events or circumstances after the date of such statements.

         Hudson River has filed a Registration  Statement on Form S-4 concerning
the merger with the United  States  Securities  and  Exchange  Commission  which
includes  the joint merger  proxy  statement/prospectus  already sent to you. In
addition,    Hudson    River    and    Cohoes    each    intend    to   file   a
Solicitation/Recommendation  statement  with the United  States  Securities  and
Exchange  Commission  in response to the Tender  Offer  Statement to be filed by
TrustCo Bank Corp NY or, in the case of Cohoes, Ambanc Holding Co., Inc. WE URGE
INVESTORS TO READ THESE DOCUMENTS  BECAUSE THEY CONTAIN  IMPORTANT  INFORMATION.
Investors are currently able to obtain the Form S-4  Registration  Statement and
will be able to obtain the Solicitation/Recommendation Statement of each company
when filed,  free of charge at the SEC(1)s  website,  www.sec.gov.  In addition,
documents  filed with the SEC by Cohoes are  available  free of charge  from the
Secretary of Cohoes at 75 Remsen Street, Cohoes, New York 12047, telephone (518)
233-6500.  Documents  filed with the SEC by Hudson River are  available  free of
charge from the Secretary of Hudson River at One Hudson City Centre, Hudson, New
York 12534, telephone (518) 828-4600.

         Cohoes and Hudson River and their  respective  directors  and executive
officers  may be deemed to be  participants  in the  solicitation  of proxies to
approve the Merger.  INFORMATION  ABOUT THE PARTICIPANTS MAY BE OBTAINED THROUGH
THE SEC(1)S  WEBSITE FROM THE S-4  REGISTRATION  STATEMENT FILED WITH THE UNITED
STATES SECURITIES AND EXCHANGE COMMISSION ON JUNE 26, 2000, as amended.

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                    VOTE | FOR | THE COHOES/HUDSON RIVER MERGER!
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