Exhibit 5-d


                  (Letterhead of Richards, Layton & Finger)


                              February 12, 1998


MSDW Capital Trust III
c/o Morgan Stanley, Dean Witter, Discover & Co.
1585 Broadway
New York, New York 10036

     Re:  MSDW Capital Trust III
          ----------------------

Ladies and Gentlemen:

     We  have acted  as special  Delaware  counsel for  Morgan Stanley,  Dean
Witter,  Discover  & Co.,  a Delaware corporation  (the "Company"),  and MSDW
Capital Trust  III, a  Delaware business trust  (the "Trust"),  in connection
with  the matters set forth  herein.  At your request,  this opinion is being
furnished to you.

     For  purposes  of  giving  the   opinions  hereinafter  set  forth,  our
examination of documents has been limited to  the examination of originals or
copies of the following:

     (a)  The  Certificate of  Trust of the  Trust, dated as  of February 12,
1998 (the "Certificate"), as filed in the office of the Secretary of State of
the State of Delaware (the "Secretary of State") on February 12, 1998;

     (b)  The Trust Agreement  of the Trust,  dated as of February  12, 1998,
among  the  Company,  the  trustees  of  the  Trust  named  therein  and  the
administrators of the Trust named therein;

     (c)  The Registration  Statement (the "Registration Statement")  on Form
S-3,  including a preliminary prospectus  (the "Prospectus"), relating to the
Capital  Securities  of  the  Trust  representing  preferred  undivided
beneficial interests in the assets  of the Trust (each, a  "Capital Security"
and  collectively, the "Capital Securities"), as proposed  to be filed by the
Company, the Trust  and others as set  forth therein with the  Securities and
Exchange Commission on or about February 12, 1998;

     (d)  A form of  Amended and Restated Trust Agreement of the Trust, to be
entered into among the Company, the trustees of the Trust named  therein, the
administrators named therein and the holders, from time to time, of undivided
beneficial interests in  the assets of the Trust (including Exhibits A, C and
D  thereto)  (the   "Trust  Agreement"),  attached  as  an   exhibit  to  the
Registration Statement; and

     (e)  A Certificate  of Good Standing  for the Trust, dated  February 12,
1998, obtained from the Secretary of State.

     Initially  capitalized terms used  herein and not  otherwise defined are
used as defined in the Trust Agreement.  

     For purposes of  this opinion, we have not reviewed  any documents other
than  the  documents  listed  in  paragraphs  (a)  through  (e)  above.    In
particular,  we have  not reviewed  any  document (other  than the  documents
listed in  paragraphs  (a) through  (e)  above) that  is  referred to  in  or
incorporated by reference into the documents reviewed by us.  We have assumed
that there exists no provision in any document that we have not reviewed that
is  inconsistent with  the  opinions stated  herein.   We  have conducted  no
independent factual  investigation of our  own but rather have  relied solely
upon  the  foregoing documents,  the  statements  and information  set  forth
therein and the additional matters recited or assumed herein, all of which we
have assumed to be true, complete and accurate in all material respects.

     With respect to  all documents examined by  us, we have assumed  (i) the
authenticity of  all documents submitted  to us as authentic  originals, (ii)
the conformity with  the originals of all documents submitted to us as copies
or forms, and (iii) the genuineness of all signatures.

     For  purposes of  this  opinion,  we have  assumed  (i)  that the  Trust
Agreement and the Certificate are in full  force and effect and have not been
amended, (ii) except  to the extent  provided in paragraph  1 below, the  due
creation or due  organization or due formation, as the case may be, and valid
existence in  good standing  of each party  to the  documents examined  by us
under the  laws of the  jurisdiction governing its creation,  organization or
formation, (iii) the legal capacity of natural persons who are parties to the
documents examined  by us,  (iv) that each  of the  parties to  the documents
examined by us has  the power and  authority to execute  and deliver, and  to
perform its  obligations under, such  documents, (v)  the due  authorization,
execution and delivery by  all parties thereto of  all documents examined  by
us, (vi) the  receipt by  each Person  to whom a  Capital Security  is to  be
issued  by the  Trust (collectively,  the  "Capital Security  Holders") of  a
Capital Securities Certificate for such  Capital Security and the payment for
the Capital Security acquired  by it, in accordance with  the Trust Agreement
and the  Registration Statement,  and (vii) that  the Capital  Securities are
issued and sold to the Capital Security Holders in accordance with  the Trust
Agreement and the  Registration Statement.  We  have not participated in  the
preparation of  the Registration Statement  and assume no  responsibility for
its contents.

     This opinion is  limited to the laws of the State of Delaware (excluding
the securities laws of the State of Delaware), and we have not considered and
express no opinion on the  laws of any other jurisdiction, including  federal
laws and  rules and regulations relating thereto.   Our opinions are rendered
only  with  respect  to  Delaware  laws and  rules,  regulations  and  orders
thereunder that are currently in effect.

     Based upon the foregoing, and upon our  examination of such questions of
law and statutes  of the State of Delaware as we have considered necessary or
appropriate,  and subject to the assumptions, qualifications, limitations and
exceptions set forth herein, we are of the opinion that:

     1.   The Trust  has been duly  created and  is validly existing  in good
standing as a business trust under the Delaware Business Trust Act.

     2.   The Capital  Securities will represent  valid and,  subject to  the
qualifications set forth  in paragraph 3 below, fully  paid and nonassessable
undivided beneficial interests in the assets of the Trust.  

     3.   The  Capital Security Holders,  as beneficial owners  of the Trust,
will  be entitled to  the same limitation  of personal liability  extended to
stockholders of private corporations  for profit organized under the  General
Corporation Law of the State of Delaware.   We note that the Capital Security
Holders  may  be  obligated  to make  payments  as  set  forth  in the  Trust
Agreement.

     We consent  to  the  filing of  this  opinion with  the  Securities  and
Exchange  Commission  as  an  exhibit  to the  Registration  Statement.    In
addition,  we  hereby  consent to  the  use  of our  name  under  the heading
"Validity  of  Securities"  in  the  Prospectus.   In  giving  the  foregoing
consents, 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 of  the  Securities  and  Exchange
Commission thereunder.   Except  as stated above,  without our  prior written
consent, this opinion may not be  furnished or quoted to, or relied upon  by,
any other Person for any purpose.


                            Very truly yours,


                            RICHARDS, LAYTON & FINGER