Exhibit 99 (d)


Simmons First National Corporation
P. O. Box 7009
Pine Bluff, Arkansas 71611


Gentlemen:

     I may presently be considered to be an "affiliate", as defined in paragraph
(a) of Rule 144 of the Rules and  Regulations  of the  Securities  and  Exchange
commission  ("SEC") under the Securities Act of 1933, as amended (the "Act"), of
Lincoln  Bankshares,  Inc., Lincoln,  Arkansas,  a bank holding company ("LBI").
Pursuant  to the  merger  (the  "Merger")  of ABA with and  into  Simmons  First
National Corporation  ("Simmons"),  I will acquire ________ shares of the common
stock,  par value $1 per share  ("Common  Stock"),  of Simmons.  I represent and
warrant  that I will not make any sale,  transfer  or other  disposition  of the
Shares in violation of the Act or the General Rules and Regulations  promulgated
thereunder by the SEC.

     I have been  advised  that the Shares  issued to me  pursuant to the Merger
have been  registered  under the Act in the  Registration  Statement on SEC Form
S-4, as amended,  Registration No. ________ ("Registration  Statement") as filed
with the SEC, and have received a copy of the proxy/prospectus  filed as part of
the Registration  Statement.  However,  I have also been advised that any public
offering or sale by me of any of the Shares will,  under  current  law,  require
either (i) the further registration (by amendment of such Form S-4 or otherwise)
under  the  Act of the  Shares  to be  sold or (ii)  compliance  with  Rule  145
promulgated  under the Act or (iii) the  availability of another  exemption from
such registration.

     I agree that  notwithstanding  any  provision  herein or  contained  in the
Agreement  and  Plan  of  Reorganization  that I will  not  sell,  transfer,  or
otherwise dispose of any of the Shares unless Simmons has made public disclosure
of financial results reflecting 30 days' of post-Merger  combined  operations of
LBI and Simmons within the meaning of Section  201.01 of the SEC's  Codification
of Financial Reporting Policies.  Simmons has agreed to make the required public
disclosure of financial  results as set out above as soon as feasible  after the
Merger is consummated.  In addition,  I hereby  represent and warrant to Simmons
that I have not made any sales of LBI or Simmons  common stock during the 30-day
period  immediately  preceding the date hereof and I further agree not to engage
in any such sales prior to the  Merger,  nor have I pledged or will I pledge any
Simmons or LBI common stock to secure any obligation during such period.

     I represent and warrant to Simmons that:

     1. I have  carefully  read this letter and discussed its  requirements  and
other applicable limitations upon the sale, transfer or other disposition of the
Shares, to the extent I felt necessary, with my counsel or counsel for LBI.

     2. I have been informed by Simmons that any distribution by me of the Share
has not been  registered  under the Act and that the  Shares  must be held by me
indefinitely until (i) such distribution of the Shares has been registered under
the Act,  (ii) a sale of the  Shares is made in  conformity  with the volume and
other  limitations  of Rule 145  promulgated  by the SEC under the Act, or (iii)
some other  exemption  from  registration  is available with respect to any such
proposed sale, transfer or other disposition of the Shares.

     3. I have been  informed by Simmons  that it is  required to file  periodic
reports with the SEC and the NASDAQ and that  certain  sales of the Shares by me
may not be  required  to be  registered  under  the Act by  virtue  of Rule  145
promulgated  by the SEC under  the Act,  provided  that  such  sales are made in
accordance  with all of the terms and conditions of such Rules,  including among
other things the following:

                  (a) The amount of Simmons  Common Stock sold by me pursuant to
Rule 145 during any period of three months  cannot exceed the greater of (i) one
percent  of the  total  outstanding  Simmons  Common  Stock or (ii) the  average
reported weekly trading volume on NASDAQ during the four week period immediately
preceding  receipt  of the order by the broker to execute  the  transaction.  In
computing the foregoing  quantity  limit it is necessary to count sales not only
by me but also by certain immediate family members and other related persons and
others with whom I may act in concert.

                  (b) Sales must be made in brokers'  transactions as defined by
the SEC Rule 144 (certain provisions of which are incorporated by reference into
Rule 145).

                  (c) No sales may be made  under the Rule  unless  Simmons  has
filed all SEC reports required to be filed by Simmons.

     4. I understand  that Simmons is under no  obligation to register the sale,
transfer or other disposition of the Shares by me or on my behalf.


     5. I understand  and agree that stop  transfer  instruction  will be issued
with  respect  to the  Shares  and  there  will be  placed  on the  certificates
representing such Shares, or any certificate delivered in substitution therefor,
a legend stating in substance:

         "The shares  represented  by this  Certificate  have been issued to the
         registered  holder as a result of a transaction to which Rule 145 under
         the Securities Act of 1933, as amended,  (the "1933 Act") applies.  The
         shares represented by this certificate may not be sold,  transferred or
         assigned,  and the issuer  shall not be  required to give effect to any
         attempted  sale,  transfer  or  assignment,  except  pursuant  to (i) a
         registration  statement  then in  effect  under  the 1933  Act,  (ii) a
         transaction  permitted  by Rule 145 as to which the issuer has received
         evidence of compliance  with the provisions of said Rule 145 reasonably
         satisfactory  to it or (iii) a  transaction  which,  in the  opinion of
         counsel  for  the  Affiliate  or  as  described  in  a  "no-action"  or
         interpretive  letter  from the  staff of the  Securities  and  Exchange
         Commission,  in each case reasonably satisfactory in form and substance
         to the issuer, is exempt from the registration requirements of the 1933
         Act. The  restrictions of this paragraph shall become null and void and
         this paragraph shall have no effect on and after _____________."

     6. I have been  informed  by  Simmons  that if I propose  to sell to any of
these Shares pursuant to Rule 145, and if such sale would be permitted under the
terms of this letter, Simmons will, upon my written request,  supply me with the
following:

                  (a) A statement as to whether  Simmons has  complied  with the
provisions of Rule 145  regarding  filing of SEC reports as a condition to sales
made pursuant to that Rule;

                  (b)      A confirmation as to the number of shares of Simmons
Common Stock outstanding as shown by the most recent report or statement
published by it; and

                  (c)      Simmons' taxpayer identification number and SEC file
number.

     I have carefully  read this letter and have had an adequate  opportunity to
review the Merger  Agreement and understand the requirements and the limitations
imposed upon the  distribution,  sale,  transfer,  or other  disposition  of ABA
common stock or Shares of Simmons.



                                                     Sincerely,