[LOGO OF JONES INTERCABLE]
                                                                  EXHIBIT (C)(3)

                               December 10, 1996

Ronald Dickerman
Bryan E. Gordon
Gramercy Park Investments, LP
400 Madison Avenue
Suite 804
New York, New York 10017

          Re:  Cable TV Fund 15-A, Ltd.
               Request for Limited Partnership List

Dear Messrs. Dickerman and Gordon:

          I am writing to respond, on behalf of Jones Intercable, Inc. (the
"General Partner"), to your request for a list of the names, addresses and
related interest holdings of the limited partners of Cable TV Fund 15-A, Ltd.
(the "Partnership"). As you have been made aware, the General Partner carefully
limits access to this information to protect the confidentiality interests of
the Partnership and its limited partners and to guard against any possible
commercial exploitation of the list or its use for any other improper or non-
partnership purpose.

          Our records indicate that Gramercy Park Investments, LP ("Gramercy")
is a limited partner of the Partnership. Based on your representation to the
General Partner that Gramercy intends to use the list for the sole purpose of
seeking to increase Gramercy's ownership in the Partnership via a limited
tender offer, and subject to Gramercy's agreeing to the terms and conditions
set forth in this letter agreement, the General Partner will provide you with a
list of names, addresses and related interest holdings of the limited partners
of the Partnership. 

 
Ronald Dickerman
Bryan E. Gordon
December 10, 1996
Page 2

          1 . Within 10 business days of the General Partner's receipt of a
fully executed original of this letter agreement, the General Partner will
deliver to Gramercy a list of the names and addresses of the limited partners
with the number of partnership interests held by each limited partner in the
Partnership. The parties agree that, to the extent any list delivered pursuant
to this letter agreement reflects a limited partner's interest as being held by
a custodian, the General Partner shall be deemed to have satisfied its
obligation under this letter agreement by identifying each custodian.

          2.   Gramercy acknowledges that the information being provided by the
General Partner relating to the Partnership pursuant to this letter agreement
constitutes confidential and proprietary information of the General Partner
and/or the Partnership. Gramercy agrees that the list of limited partners
obtained by it pursuant to this letter agreement shall be used solely for the
purpose of contacting limited partners of the Partnership to inquire as to
whether they wish to sell their interests in the Partnership to Gramercy or one
of its affiliates and for no other purpose. Gramercy, its general partners,
officers, directors, principals, agents and affiliates will make all
reasonable efforts to safeguard the list and the information contained therein
from disclosure to third parties, and will not furnish the list or the
information contained therein to any other person or entity. This letter
agreement, including this paragraph relating to confidentiality and the uses to
which the partnership list may be put, shall be binding upon Gramercy, its
general partners, officers, directors, principals, agents and affiliates, and
shall survive the termination of the limited tender offer contemplated to be
undertaken by Gramercy for a period of two (2) years.

          3.   Gramercy represents that all limited partnership interests 
of the Partnership acquired by it pursuant to the proposed limited tender offer
will be acquired for investment purposes only and not with an intention to
resell the interests.

          4.   In order to avoid disrupting the possible sale of all or
substantially all of the Partnership's assets and any required vote of the
limited partners of the Partnership, Gramercy agrees that on any proposal or 
issue submitted to a vote of the Partnership's limited partners, Gramercy will
vote all

 
Ronald Dickerman
Bryan E. Gordon
December 10, 1996
Page 3

of its limited partnership interests in the Partnership in the same manner as
the majority of all other limited partners who vote on any such proposal or
issue.

          5.   Gramercy represents that, for the period commencing as of the
date of this letter agreement and continuing for 12 months thereafter, Gramercy
and any person or entity controlled, managed or advised by it shall not in any
manner acquire, attempt to acquire or make a proposal to acquire, directly or
indirectly, more than a 5% interest in the Partnership.

          6.   Gramercy agrees to limit its purchases of limited partnership
interests in any tax year of the Partnership so as not to cause the Partnership
to be treated as a publicly traded partnership within the meaning of Section
7704 of the Internal Revenue Code. Gramercy will not ask the General Partner to
approve any transfers of interests in the Partnership in any tax year of the 
Partnership if such transfers, together with all other transfers made during 
such tax year, would cause transfers of interests in the Partnership to exceed 
the 5% safe harbor set forth in Paragraph II, Section C(l) of Internal Revenue
Service Notice 88-75.

          7.   Gramercy agrees that the price offered by it for limited 
partnership interests in the Partnership pursuant to the proposed limited 
tender offer will be no less than $175 per limited partnership interest.

          8.   Gramercy agrees that any communication it sends to any limited
partner identified on the list of limited partners of the Partnership being
provided to Gramercy by the General Partner pursuant to this letter agreement
shall expressly state that "Neither Jones Intercable, Inc., the general partner
of Cable TV Fund 15-A, Ltd., nor Cable TV Fund 15-A, Ltd. or their respective
affiliates or subsidiaries are parties to this offer." Gramercy further agrees
that it shall provide to Jones Intercable, Inc., 9697 East Mineral Avenue, P.O.
Box 3309, Englewood, Colorado 80115-3309, Attn: David K. Zonker (facsimile
(303) 790-9021) a copy of any correspondence that Gramercy proposes to send to
any limited partner of the Partnership prior to use.

          9.   Gramercy agrees to pay all costs incurred by the Partnership 
in connection with the production of the list and the processing of transfers

 
Ronald Dickerman
Bryan E. Gordon
December 10, 1996
Page 4

related to Gramercy's limited tender offer, including, without limitation, all
printing, mailing, personnel and other administrative expenses incurred by the
Partnership in connection with such limited tender offer (i) to the extent that
such costs are not covered by the transfer fees paid by Gramercy in connection
with Gramercy's limited tender offer for interests in the Partnership and (ii)
in an amount not to exceed $5,000. Gramercy further agrees that the transfer
of interest forms to be used by it in connection with the limited tender offer
will conform in all respects to the transfer of interest processes approved for
use by the General Partner, including, without limitation, the requirements for
guaranteed signatures of transferors and transferees.

          10.  Gramercy agrees that it will return the list of limited partners
of the Partnership to the General Partner (without making any copies thereof)
within 10 business days of the completion of Gramercy's limited tender offer.

          If the foregoing terms and conditions are acceptable to you please
indicate your agreement to each of the terms and conditions by signing the
enclosed duplicate original of this letter agreement in the space provided below
and returning it to the undersigned at your earliest convenience. Please also
remit a check for $150.00 payable to Jones Intercable, Inc. to cover the costs,
of creating, producing and mailing the list of the Partnership's limited 
partners.

                                           JONES INTERCABLE, INC.,       
                                           on its own behalf and         
                                           as general partner of         
                                           Cable TV Fund 15-A, Ltd.,     
                                           a Colorado limited partnership 

                                           By: /s/ Kevin P. Coyle
                                              -----------------------------   
                                              Kevin P. Coyle
                                              Group Vice President/Finance

 
Ronald Dickerman
Bryan E. Gordon
December 10, 1996
Page 5

Gramercy Park Investments, LP hereby agrees to each and all of the terms and
conditions set forth above.

By: /s/ Bryan E. Gordon
   ---------------------------------

Name: Bryan E. Gordon
     -------------------------------

Title: Managing Director
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Date: 12/11/96
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