Exhibit 4-k



                               TRUST AGREEMENT
                                      OF
                             MSDW CAPITAL TRUST V


     THIS  TRUST AGREEMENT  is  made as  of February  12,  1998 (this  "Trust
Agreement"), among  Morgan Stanley, Dean  Witter, Discover & Co.,  a Delaware
corporation, as depositor (the "Depositor"), The Bank of New York (Delaware),
a Delaware banking corporation, as Delaware trustee (the "Delaware Trustee"),
The Bank  of New York,  a New York  banking corporation, as  property trustee
(the "Property Trustee", and together  with the Delaware Trustee, the "Issuer
Trustees")  and  Alexander C.  Frank  and  Debra  M. Aaron,  individuals,  as
administrators (the "Administrators").  The Depositor and the Issuer Trustees
hereby agree as follows:

     1.   The trust  created hereby  shall be known  as MSDW Capital  Trust V
(the "Issuer Trust"), in which name the Issuer Trustees or the  Depositor, to
the extent provided  herein, may conduct  the business  of the Issuer  Trust,
make and execute contracts, and sue and be sued.

     2.   The  Depositor hereby assigns, transfers,  conveys and sets over to
the Issuer Trust the sum of  $10.  It is the intention of  the parties hereto
that  the Issuer  Trust  created  hereby constitute  a  business trust  under
Chapter 38 of Title 12 of the Delaware Code, 12 Del. C. Section 3801, et seq.
                                                -------               -- ---
(the "Business Trust  Act"), and that this document  constitute the governing
instrument of the  Issuer Trust.  The  Issuer Trustees are  hereby authorized
and directed  to execute and  file a certificate  of trust with  the Delaware
Secretary of State  in accordance with the  provisions of the Business  Trust
Act.  

     3.   An amended and restated Trust Agreement satisfactory  to each party
to it and substantially in the form to be included as an  exhibit to the 1933
Act Registration Statement  (as herein defined), or in such other form as the
parties  thereto  may  approve,  will be  entered  into  to  provide  for the
contemplated operation of the Issuer Trust created hereby and the issuance of
the Capital Securities and  Common Securities referred to therein.   Prior to
the execution and  delivery of such amended and restated Trust Agreement, the
Issuer  Trustees shall  not have  any duty  or obligation  hereunder or  with
respect of the trust  estate, except as otherwise required by  applicable law
or as  may be necessary  to obtain prior to  such execution and  delivery any
licenses, consents or approvals required by applicable law or otherwise.  
Notwithstanding  the foregoing,  the  Issuer Trustees  may  take all  actions
deemed  proper  as  are necessary  to  effect  the transactions  contemplated
herein.  It is the intent of the parties hereto that the Administrators shall
not  be trustees with  respect to the  Issuer Trust and  this Trust Agreement
shall be construed in a manner consistent with such intent.

     4.   The  Depositor, as  the depositor  of the  Issuer Trust,  is hereby
authorized  (i) to  file with  the  Securities and  Exchange Commission  (the
"Commission")  and to  execute,  in the  case  of the  1933 Act  Registration
Statement and 1934 Act Registration  Statement (as herein defined), on behalf
of the Issuer Trust, (a) a Registration Statement (the "1933 Act Registration
Statement"), including  pre-effective or  post-effective amendments  thereto,
relating to  the registration under  the Securities  Act of 1933,  as amended
(the "1933 Act"),  of the  Capital Securities  of the Issuer  Trust, (b)  any
preliminary prospectus  or prospectus or  supplement thereto relating  to the
Capital Securities required  to be filed pursuant to the 1933  Act, and (c) a
Registration Statement on Form 8-A or  other appropriate form (the "1934  Act
Registration Statement"),  including  all  pre-effective  and  post-effective
amendments thereto, relating to the registration of the Capital Securities of
the Issuer Trust under the Securities Exchange  Act of 1934, as amended; (ii)
to file with  the New York Stock  Exchange, the American Stock  Exchange, The
London Stock Exchange Ltd, The Luxembourg Stock Exchange, The Paris Bourse or
other stock  exchange or  securities market, or  the National  Association of
Securities Dealers  ("NASD"), and  execute on  behalf of  the Issuer  Trust a
listing  application and  all  other applications,  statements, certificates,
agreements and other instruments as shall be necessary or desirable  to cause
the Capital  Securities to  be listed  on the  New York  Stock Exchange,  the
American Stock Exchange, The London  Stock Exchange Ltd, The Luxembourg Stock
Exchange, The Paris Bourse or such other stock exchange or securities market,
or the NASD's Nasdaq National  Market; (iii) to file and execute on behalf of
the  Issuer Trust  such  applications,  reports,  surety  bonds,  irrevocable
consents, appointments  of attorney for  service of process and  other papers
and documents  as shall  be necessary  or desirable to  register the  Capital
Securities  under the securities or "Blue Sky"  laws of such jurisdictions as
the  Depositor,  on  behalf  of  the Issuer  Trust,  may  deem  necessary  or
desirable; and (iv) to execute, deliver  and perform on behalf of the  Issuer
Trust an underwriting agreement with one or more underwriters relating to the
offering of the  Capital Securities of the  Issuer Trust.  In  the event that
any filing referred to in clauses (i), (ii) or (iii) above is required by the
rules and regulations of the Commission, the New York Stock Exchange  or such
other exchanges or securities markets, NASD, or securities or "Blue Sky" laws
to be  executed on  behalf of  the Issuer  Trust by  the Administrators,  the
Administrators, in their capacity as  administrators of the Issuer Trust, are
hereby authorized and directed to join in  any such filing and to execute  on
behalf of  the Issuer Trust any and all of the foregoing, it being understood
that the  Administrators, in their  capacity as administrators of  the Issuer
Trust, shall not be required to join in any such filing or execute on  behalf
of the  Issuer  Trust any  such  document  unless  required  by  the  rules  
and regulations of  the Commission,  the New  York Stock  Exchange or  such 
other exchanges or securities markets, NASD, or securities or "Blue Sky" laws.

     5.   This Trust Agreement may be executed in one or more counterparts.

     6.   The  number  of trustees  and  administrators of  the  Issuer Trust
initially shall be  two and thereafter the  number of trustees of  the Issuer
Trust shall be such  number as shall be fixed from time to  time by a written
instrument signed by the Depositor which may increase or decrease  the number
of trustees and  administrators of the Issuer Trust;  provided, however, that
to  the extent required by the Business  Trust Act, one trustee of the Issuer
Trust shall  either be  a natural person  who is a  resident of the  State of
Delaware or, if not a natural person, an entity which has its principal place
of  business  in  the State  of  Delaware.   Subject  to  the  foregoing, the
Depositor  is entitled  to appoint  or  remove without  cause any  trustee or
administrator of the  Issuer Trust at any time.  Any trustee or administrator
of  the  Issuer  Trust may  resign  upon  thirty days'  prior  notice  to the
Depositor.  

     7.   This Trust  Agreement  shall  be  governed  by,  and  construed  in
accordance with,  the  laws  of the  State  of Delaware  (without  regard  to
conflict of laws principles).  


     IN WITNESS WHEREOF, the parties  hereto have caused this Trust Agreement
to be duly executed as of the day and year first above written.

                                   MORGAN STANLEY, DEAN WITTER,
                                        DISCOVER & CO.,
                                        as Depositor



                                   By:   /s/ Alexander C. Frank 
                                        ------------------------
                                   Name:     Alexander C. Frank
                                   Title:    Assistant Treasurer


                                   THE BANK OF NEW YORK (DELAWARE),
                                       not in its individual capacity
                                       but solely as Delaware Trustee


                                   By:    /s/ Walter N. Gitlin  
                                         ------------------------
                                 Name:      Walter N. Gitlin
                                Title:     Authorized Signatory


                                    THE BANK OF NEW YORK,
                                        not in its individual capacity
                                        but solely as Property Trustee


                                   By:    /s/ Michael Culhane   
                                        ------------------------
                                 Name:      Michael Culhane
                                 Title:     Vice President




                                   By:    /s/ Alexander C. Frank  
                                       --------------------------
                                 Name:      Alexander C. Frank
                                Title:     Administrator



                                   By:    /s/ Debra Aaron       
                                        ------------------------
                                 Name:      Debra Aaron
                                Title:     Administrator