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                           SCHEDULE 14A INFORMATION
                                      
               Proxy Statement Pursuant to Section 14(a) of the
                       Securities Exchange Act of 1934


Filed by the Registrant  / /

Filed by a Party other than the Registrant  /X/

Check the appropriate box:

/   /   Preliminary Proxy Statement

/   /   Definitive Proxy Statement

/ X /   Definitive Additional Materials

/   /   Soliciting Material Pursuant to (S)240.14a-11(c) or (S)240.14a-12


                         Santa Fe Pacific Corporation
               -----------------------------------------------
                Name of Registrant as Specified In Its Charter
                                      
                          Union Pacific Corporation
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                 (Namess or Person(s) Filing Proxy Statement)


Payment of Filing Fee (Check the appropriate box):

/   /   $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), or
        14a-6(i)(2).

/   /   $500 per each party of the controversy pursuant to Exchange Act Rule
        14a-6(i)(3).

/   /   Fee computed on table below per Exchange Act Rule 14a-6(i)(4) and 0-11.

/ X /   Check box if any party of the fee is offset as provided by
        Exchange Act Rule 0-11(a)(2) and identify the filing for which the
        offsetting fee was paid previously.  Identify the previous filing by
        registration statement number, or the Form or Schedule and date of its
        filing.

        (1)  Amount Previously Paid:  $125 on October 13, 1994.
        (2)  Form, Schedule or Registration Statement No.:  Schedule 14A
        (3)  Filing Party:  Same as above
        (4)  Date Filed:  October 13, 1994.

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                            UNION PACIFIC LETTERHEAD

 
                                                                October 28, 1994
 
Dear Santa Fe Pacific Stockholder:
 
      Your Board of Directors has scheduled a Special Meeting of Stockholders
for November 18, 1994, and is trying to solicit votes to approve a proposed
merger with Burlington Northern Inc. According to Santa Fe's own proxy
statement, it could take almost 18 months to obtain regulatory approval from the
Interstate Commerce Commission and "there can be no assurance that the ICC will
issue a decision any sooner than the 31-month period permitted the ICC by law."
 
      The merger with Burlington Northern cannot occur until ICC approval is
obtained. IN OUR VIEW THERE IS ABSOLUTELY NO REASON FOR YOUR BOARD TO ASK YOU TO
VOTE ON THE BURLINGTON NORTHERN MERGER NOW -- NOR IS THERE ANY REASON FOR YOU TO
RUSH TO JUDGMENT ON THAT TRANSACTION. We strongly believe it is in your
interests for your Board to give serious consideration to Union Pacific's
alternative proposal to negotiate a merger with Santa Fe.
 
      Since your Board insists on proceeding with the vote on November 18, we
believe you can best protect your own interests by exercising your right to vote
AGAINST the merger with Burlington Northern.
 
      Earlier this month, Union Pacific made a proposal to acquire Santa Fe in a
negotiated merger transaction. We also asked for an opportunity to meet and
discuss our proposal with Santa Fe's senior management and advisors, in
accordance with the terms of the existing merger agreement with Burlington
Northern.
 
      Your Board of Directors, without meeting with us and without asking for
any information to help it evaluate our proposal, rejected our proposal the day
after it was made.
 
      A few days later, we again asked your Board to give careful consideration
to our proposal, and stated that WE WERE PREPARED TO RECEIVE INFORMATION FROM
SANTA FE THAT MIGHT JUSTIFY A HIGHER PRICE. Again, our proposal was immediately
rejected, and to this day your Board has not agreed to our requests for a
meeting.
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      In rejecting our proposal, your Board took the position that a Union
Pacific-Santa Fe combination would not obtain ICC approval.
 
     Now it's time for some straight talk about the ICC.
 
     Union Pacific recently retained a panel of experts* on ICC and
transportation matters and asked them to review the case for a possible Union
Pacific/Santa Fe combination. In reaching their conclusions, these experts
reviewed a report Union Pacific prepared and provided to the Santa Fe Board
summarizing the key elements of the factual case to be included in Union
Pacific's application for ICC approval. Based on their review of this report,
discussions among members of the panel and their own analysis and experience in
this area, the panel reached the following conclusions:
 
     The three ICC experts concluded:
 
     - Union Pacific has outlined a strong case for ICC approval of a
       combination with Santa Fe that warrants favorable consideration by the
       ICC.
 
     - A Union Pacific/Santa Fe combination should have good prospects of
       obtaining ICC approval.
 
     The federal transportation policy expert concluded:
 
     - The Department of Transportation is unlikely to oppose, and may well
       support, a Union Pacific/Santa Fe combination.
 
     The expert on logistics and shipper needs concluded:
 
     - A Union Pacific/Santa Fe combination would provide major benefits for the
       shipping public as well as U.S. industry in general. A combined Union
       Pacific/Santa Fe will become more cost and service competitive in their
       markets to the benefit of rail industry customers.
 
- ---------------
 
* The panel of experts consists of Malcolm M.B. Sterrett, an attorney with
  extensive rail transportation experience and a former ICC Commissioner; John
  F. DePodesta, an attorney who has represented numerous rail carriers and
  public bodies in proceedings before the ICC and a former General Counsel of
  Consolidated Rail Corporation; C. John Langley Jr., Ph.D., John H. "Red" Dove
  Distinguished Professor of Logistics and Transportation, University of
  Tennessee; Walter B. McCormick, Jr., Partner, Bryan Cave, Washington, D.C.,
  and former General Counsel of the U.S. Department of Transportation; and
  Robert N. Kharasch, a Washington, D.C. lawyer for more than 40 years who
  specialized in transportation law and who was coordinating counsel for
  railroad opponents to the unsuccessful Santa Fe/ Southern Pacific merger. No
  member of the panel has previously represented Union Pacific before the ICC or
  on any other matter, except that Dr. C. John Langley, Jr. has in the past done
  limited consulting for Union Pacific.
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     The panel's conclusions also noted that ICC approval is a long and complex
process that can take two years or longer, and that at this stage, one cannot
predict with certainty the outcome of ICC review of either a Union Pacific or a
Burlington Northern combination with Santa Fe.
 
     Although there are significant ICC issues and Union Pacific cannot predict
the ultimate outcome of the review process, we believe the experts' conclusions
should dispel Santa Fe's stated concerns about the legitimacy of our proposal
and should encourage Santa Fe to enter into good faith negotiations with Union
Pacific.
 
     You have an important investment in your Santa Fe stock -- and your voice
should be heard. Your vote AGAINST the Burlington Northern merger will send a
clear message to your Board that you want them to negotiate with Union Pacific.
 
     If Santa Fe stockholders vote to approve the Burlington Northern merger, we
will withdraw the Union Pacific proposal. Then there will be no alternative for
your board to consider.
 
     In order to protect your own interests, we urge you to vote against the
Burlington Northern merger. Please sign, date and mail the enclosed gold proxy
today.
 
     Thank you for your consideration and support.
 
                                               Sincerely,

                                               /s/ Drew Lewis
                                               Chairman and
                                               Chief Executive Officer
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                                   IMPORTANT
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    1. Regardless of how many shares you own, your vote is very important.
       Please sign, date and mail the enclosed GOLD proxy today.
 
    2. We urge you NOT to sign the WHITE proxy sent to you by Santa Fe.
 
    3. If any of your shares are held in the name of a bank, broker or other
       nominee, please direct the party responsible for your account to vote
       AGAINST the Burlington Northern merger.
 
    4. For assistance in voting your shares or further information, please
       contact the firm assisting us in the solicitation of proxies:
 
                               MORROW & CO., INC.
                          Call toll free 800-856-8309
                     In New York City, call: (212) 754-8000

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THIS IS NEITHER AN OFFER TO SELL NOR A SOLICITATION OF OFFERS TO BUY ANY
SECURITIES WHICH MAY BE ISSUED IN ANY MERGER OR SIMILAR BUSINESS COMBINATION
INVOLVING UNION PACIFIC AND SANTA FE. THE ISSUANCE OF SUCH SECURITIES WOULD HAVE
TO BE REGISTERED UNDER THE SECURITIES ACT OF 1933 AND SUCH SECURITIES WOULD BE
OFFERED ONLY BY MEANS OF A PROSPECTUS COMPLYING WITH THE REQUIREMENTS OF SUCH
ACT.