EXHIBIT 8



                  [Letterhead of Brown & Wood LLP]

                                                            February 12, 1998


Morgan Stanley, Dean Witter, 
       Discover & Co.
1585 Broadway
New York, NY  10036


          Re:  Morgan Stanley, Dean Witter, Discover & Co.
               MSDW Capital Trust I, MSDW Capital Trust II,
               MSDW Capital Trust III, MSDW Capital Trust IV
               and MSDW Capital Trust V
               Registration Statement on Form S-3
               ----------------------------------

Ladies and Gentlemen:


     We have acted as tax counsel to  Morgan Stanley, Dean Witter, Discover &
Co.,  a Delaware  corporation (the  "Company"),  MSDW Capital  Trust I,  MSDW
Capital Trust  II, MSDW  Capital Trust III,  MSDW Capital  Trust IV  and MSDW
Capital Trust V, each a statutory business trust formed under the laws of the
State  of Delaware  (each, an  "Issuer Trust"  and, collectively,  the Issuer
Trusts),  in  connection  with a  Registration  Statement  (the "Registration
Statement")  on Form S-3  filed by the  Company and the  Issuer Trusts on the
date  hereof with  the Securities  and  Exchange Commission  pursuant to  the
Securities  Act of 1933, as  amended (the "Securities  Act"), relating to the
registration  of  Debt Securities  of  the Company  (the  "Debt Securities"),
Capital Securities  of  the  Issuer  Trusts (the  "Capital  Securities")  and
Guarantees  of  the Company  with  respect  to  the Capital  Securities  (the
"Guarantees").

     The Debt  Securities are to  be issued from  time to time  as either (a)
senior indebtedness of the  Company under an indenture dated as  of April 15,
1989, as  supplemented by a First  Supplemental Senior Indenture dated  as of
May 15, 1991 and a Second Supplemental Senior Indenture dated as of April 15,
1996,  between Morgan  Stanley Group  Inc. ("Morgan  Stanley") and  The Chase
Manhattan Bank  (formerly known  as Chemical Bank),  as trustee  (the "Senior
Debt Trustee"), and a Third Supplemental Senior Indenture dated as of June 1,
1997 between the Company (as successor to Morgan Stanley) and the Senior Debt
Trustee  (such indenture  as  so supplemented  the  "Senior Indenture"),  (b)
senior subordinated indebtedness  of the Company under an  indenture dated as
of  April 15,  1989, as  supplemented  by a  First Supplemental  Subordinated
Indenture  dated as  of May 15,  1991 and a  Second Supplemental Subordinated
Indenture dated as  of April 15, 1996,  between Morgan Stanley and  The First
National  Bank  of  Chicago,  as  trustee   (the  "Senior  Subordinated  Debt
Trustee"), and a  Third Supplemental Subordinated Indenture dated  as of June
1, 1997  between the Company (as successor to  Morgan Stanley) and the Senior
Subordinated Debt  Trustee (such  indenture as  so supplemented, the  "Senior
Subordinated  Indenture")  or  (c) junior  subordinated  indebtedness  of the
Company  under an indenture  to be entered  into between the  Company and The
Bank  of New  York,  as  trustee (the  "Junior  Subordinated Indenture"  and,
together with the Senior Indenture and the Senior Subordinated Indenture, the
"Indentures").

     The  Capital Securities of each Issuer Trust  will be issued pursuant an
Amended and Restated  Trust Agreement (the "Trust Agreement")  of such Issuer
Trust to  be entered  into among  the Company,  as depositor  of such  Issuer
Trust, The  Bank of  New York,  as  property trustee,  The Bank  of New  York
(Delaware), as Delaware  trustee, two individuals selected by  the holders of
the  Common Securities  issued by  such Issuer  Trust as  administrators with
respect to such Issuer Trust and the holders of the Common Securities and the
Capital Securities of such Issuer Trust.

     The forms  of the Indentures,  the Trust Agreements, the  Guarantees and
the Debt Securities are filed or incorporated by reference as exhibits to the
Registration Statement.

     In rendering  this opinion,  we have examined  the originals  or copies,
certified to our satisfaction, of  such corporate records and other documents
and  certificates as  we  deemed necessary.    In such  examination,  we have
assumed the genuineness of all  signatures, the authenticity of all documents
submitted to us as originals, the conformity to the original documents of all
documents submitted to  us as copies and the authenticity of the originals of
all such  latter documents.  In addition, in  rendering this opinion, we have
assumed  the  authorization, execution  and delivery  of the  Indentures, the
Trust Agreements and the Guarantees by all parties (including Morgan Stanley)
other  than the Company.  As to any  facts material to this opinion, we have,
when relevant facts were not independently established by us, relied upon the
aforesaid records, certificates and documents.

     Based upon the foregoing and assuming that the Issuer Trusts were formed
and will be maintained in compliance  with the terms of the Trust  Agreements
we hereby confirm:

     (i)  our  opinions set  forth  in the  Registration Statement  under the
caption  "Certain   Federal  Income  Tax  Consequences"  in   the  Prospectus
Supplement and

     (ii) that,   subject  to  the  qualifications  set  forth  therein,  the
discussion set forth in the  Registration Statement under such caption is  an
accurate summary  of the United  States federal income tax  matters described
therein.

     We  express no  opinion with  respect  to the  transactions referred  to
herein or in  the Registration Statement  other than  as expressly set  forth
herein.   Moreover, we  note that  there is  no authority  directly on  point
dealing with securities such as the Capital Securities or transactions of the
type described  herein and that our opinions are  not binding on the Internal
Revenue Service ("IRS") or the courts, either  of which could take a contrary
position.   Nevertheless,  we believe  that  if challenged,  the opinions  we
express herein would be sustained by a court with jurisdiction in  a properly
presented case.

     Our  opinions are  based upon  the  Internal Revenue  Code  of 1986,  as
amended, the Treasury  regulations promulgated thereunder and  other relevant
authorities  and law,  all as in  effect on  the date hereof.   Consequently,
future  changes in the  law may cause  the tax treatment  of the transactions
referred to herein to be materially different from that described above.

     The opinions we express herein are limited solely to matters governed by
the federal income tax laws of the United States.

     We hereby consent to the use of this opinion for  filing as Exhibit 8 to
the  Registration Statement  and  the use  of  our name  in  the Registration
Statement  under the  captions "Certain Federal Income  Tax Consequences"  in
the Prospectus Supplement and "Validity of Securities" in the Prospectus.

                                   Very truly yours,

                                   /s/ Brown & Wood LLP

                                   BROWN & WOOD LLP