April 27, 2010

Ms. Laura E. Hatch

United States Securities and Exchange Commission
Division of Investment Management
100 F Street, N.E.

Washington, DC 20549

Re:      The GAMCO Mathers Fund (the "Fund")

         Post-Effective Amendment No. 73 to the Registration Statement
         on Form N-1A (002-23727)

Dear. Ms. Hatch:

         This letter  responds to your  comments  communicated  by  telephone on
April 7,  2010,  with  respect  to the  Post-Effective  Amendment  No. 73 to the
Registration  Statement on Form N-1A (the "Registration  Statement") of the Fund
that was filed  with the  Securities  and  Exchange  Commission  (the  "SEC") on
February 26, 2010 (accession number 0000950123-10-017900).

         In addition, in connection with this filing, the Fund hereby states the
following:

         1.       The Fund  acknowledges  that in  connection  with the comments
                  made by the Staff of the SEC,  the Staff has not passed on the
                  accuracy or adequacy of the  disclosure  made herein,  and the
                  Fund and its management are solely responsible for the content
                  of such disclosure;

         2.       The Fund acknowledges  that the Staff's comments,  and changes
                  in  disclosure  in response to the  Staff's  comments,  do not
                  foreclose   the  SEC  or  other   regulatory   body  from  the
                  opportunity  to seek  enforcement  or take other  action  with
                  respect to the disclosure made herein;

         3.       The Fund  represents  that neither it nor its management  will
                  assert  the  Staff's  comments  or changes  in  disclosure  in
                  response to the Staff's comments as a defense in any action or
                  proceeding by the SEC or any person.

                  The Fund's responses to your comments are reflected below. The
         substance  of  your  comments  has  been  restated  for  your  ease  of
         reference.



         COMMENT  #1-COVER  PAGE:  You  requested  that the Fund  pare  down the
         information  in  the  top  left  hand  corner  to  remove   duplicative
         references.

                  RESPONSE #1: The Fund has deleted the following  parenthetical
                  language that appears at the end of the  disclosure in the top
                  left hand corner:  "(Net Asset Value per share may be obtained
                  daily by calling 800-GABELLI after 7:00 p.m.)."

         COMMENT  #2-COVER  PAGE:  You requested  that the Fund add the required
         legend disclosure if the Fund intends to utilize a summary prospectus.

                  RESPONSE  #2:  The  Fund  will  not  be  utilizing  a  summary
                  prospectus  at this time and therefore the legend has not been
                  added.

         COMMENT  #3-PERFORMANCE  TABLE:  You requested that the Fund delete the
         second  sentence  of the text  after the  performance  table  regarding
         "Return After Taxes on Distributions  and Sale of Fund Shares" if it is
         not applicable for the Fund.

                  RESPONSE  #3: If this  disclosure  is not  applicable  for the
                  Fund, the Fund will remove it.

         COMMENT  #4-STATEMENT OF ADDITIONAL  INFORMATION ("SAI"): You requested
         that the Fund  include the new  corporate  governance  and board member
         disclosure.

                  RESPONSE #4: The Fund will include such disclosure in the SAI.

         Should you have any questions  regarding the  foregoing,  please do not
         hesitate  to  contact  Helen  A.  Robichaud  at PNC  Global  Investment
         Servicing, Inc., the Fund's Sub-Administrator, at 617-338-4595.

         Very truly yours,

         /s/ Bruce N. Alpert
         -------------------
         Bruce N. Alpert
         Executive Vice President

         cc: Helen A. Robichaud           Arlene Lonergan
             PNC Global Investment        PNC Global Investment
             Servicing, Inc.              Servicing, Inc.

             Peter D. Goldstein           Christoper Tafone
             Gabelli Funds, LLC           Paul, Hastings, Janofsky & Walker LLP

             Rachael Schwartz
             Paul, Hastings, Janofsky & Walker LLP