EXHIBIT 23.6
 
                 CONSENT OF MORGAN STANLEY & CO. INCORPORATED
 
April 11, 1997
 
Dean Witter, Discover & Co.
 
Dear Sirs:
 
  We hereby consent to the inclusion in the Registration Statement of Dean
Witter, Discover & Co. ("Dean Witter Discover") relating to the proposed
merger of Morgan Stanley Group Inc. with and into Dean Witter Discover, of our
opinion letter in the Joint Proxy Statement/Prospectus which is a part of the
Registration Statement, and to the references of our firm name therein. In
giving such consent, we do not thereby admit that we come within the category
of persons whose consent is required under Section 7 of the Securities Act of
1933, as amended, or the rules and regulations adopted by the Securities and
Exchange Commission thereunder nor do we admit that we are experts with
respect to any part of such Registration Statement within the meaning of the
term "experts" as used in the Securities Act of 1933, as amended, or the rules
and regulations of the Securities and Exchange Commission thereunder.
 
                                          Very truly yours,
 
                                          MORGAN STANLEY & CO. INCORPORATED
 
                                                  /s/ Bruce D. Fiedorek
                                          By:
                                             ----------------------------------
                                                    Bruce D. Fiedorek