LETTER OF TRANSMITTAL

                             MARKEL CAPITAL TRUST I

                              Offer to Exchange its
                        8.71% Series B Capital Securities
                     (Liquidation Amount $1,000 per Capital
                 Security) which have been registered under the
                             Securities Act of 1933
                       for any and all of its outstanding
                        8.71% Series A Capital Securities
                (Liquidation Amount $1,000 per Capital Security)

                           Pursuant to the Prospectus
                               dated May __, 1997
                                 --------------


     THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
            YORK CITY TIME, ON , 1997, UNLESS THE OFFER IS EXTENDED.

                                 --------------

                  The Exchange Agent for the Exchange Offer is:

                            The Chase Manhattan Bank


    By Registered or Certified Mail:       By Hand or Overnight Delivery:

        The Chase Manhattan Bank              The Chase Manhattan Bank
           Transfer Department                   Transfer Department
          450 West 33rd Street                  450 West 33rd Street
                8th Floor                             8th Floor
        New York, New York 10001              New York, New York 10001


                              Facsimile Telephone:
                          (Eligible Institutions Only)
                                 (212) 946-8154

                              Confirm by Telephone
                                 (212) 946-3049


         DELIVERY OF THIS LETTER OF  TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR  TRANSMISSION  OF THIS LETTER OF  TRANSMITTAL  VIA FACSIMILE TO A
NUMBER OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.

         THE INSTRUCTIONS CONTAINED HEREIN SHOULD BE READ CAREFULLY BEFORE THIS
LETTER OF TRANSMITTAL IS COMPLETED.

         Capitalized  terms  used but not  defined  herein  shall  have the same
meaning given them in the Prospectus (as defined below).

         This Letter of Transmittal is to be completed by holders of Old Capital
Securities  (as  defined  below)  either  if Old  Capital  Securities  are to be
forwarded  herewith  or if tenders of Old Capital  Securities  are to be made by
book-entry  transfer to an account  maintained by The Chase  Manhattan Bank (the
"Exchange  Agent") at The  Depository  Trust  Company  ("DTC")  pursuant  to the







procedures  set  forth in "The  Exchange  Offer--Procedures  for  Tendering  Old
Capital Securities" in the Prospectus.

         Holders   of   Old   Capital   Securities   whose   certificates   (the
"Certificates") for such Old Capital Securities are not immediately available or
who cannot deliver their  Certificates  and all other required  documents to the
Exchange Agent on or prior to the Expiration Date (as defined in the Prospectus)
or who cannot complete the procedures for book-entry transfer on a timely basis,
must tender their Old Capital  Securities  according to the guaranteed  delivery
procedures  set  forth in "The  Exchange  Offer--Procedures  for  Tendering  Old
Capital Securities" in the Prospectus.

         DELIVERY  OF  DOCUMENTS  TO DTC DOES  NOT  CONSTITUTE  DELIVERY  TO THE
EXCHANGE AGENT.

                     NOTE: SIGNATURES MUST BE PROVIDED BELOW
               PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

ALL TENDERING HOLDERS COMPLETE THIS BOX:

 
|---------------------------------------------------------------------------------------------------------------------------|
|                   DESCRIPTION OF OLD CAPITAL SECURITIES TENDERED                                                          |
|---------------------------------------------------------------------------------------------------------------------------|
|  If blank, please print name and address of registered holder.|          Old Capital Securities tendered                  |
|                                                               |       (Attach additional list if necessary)               |
|---------------------------------------------------------------------------------------------------------------------------|
|                                                         |              |                       |  Principal Amount of Old |
|                                                         |              |   Aggregate Principal |     Capital Securities   |
|                                                         |  Certificate |      Amount of Old    |          Tendered        |
|                                                         |  Number(s)*  |   Capital Securities  |    (if less than all)**  |
|                                                         |--------------|-----------------------|--------------------------|
|                                                         |              |                       |                          |
|                                                         |--------------|-----------------------|--------------------------|
|                                                         |              |                       |                          |
|                                                         |--------------|-----------------------|--------------------------|
|                                                         |              |                       |                          |
|                                                         |--------------|-----------------------|--------------------------|
|                                                         |              |                       |                          |
|                                                         |   TOTAL      |                       |                          |
|                                                         |   AMOUNT     |                       |                          |
|                                                         |   TENDERED:  |                       |                          |
|---------------------------------------------------------------------------------------------------------------------------|
|  *    Need not be completed by book-entry holders.                                                                        |
|                                                                                                                           |
|       **   Old Capital Securities may be tendered in whole or in part in denominations of $100,000 and integral multiples |
|            of $1,000 in excess  thereof,  provided that if any Old Capital  Securities are tendered for exchange in part, |
|            the untendered principal amount thereof must be $100,000 or any integral multiple of $1,000 in excess thereof. |
|            All Old Capital Securities held shall be deemed tendered unless a lesser number is specified in this column.   |
|                                                                                                                           |
- ----------------------------------------------------------------------------------------------------------------------------


                                        2






            (BOXES BELOW TO BE CHECKED BY ELIGIBLE INSTITUTIONS ONLY)

[ ]  CHECK HERE IF  TENDERED  OLD  CAPITAL  SECURITIES  ARE BEING  DELIVERED  BY
     BOOK-ENTRY  TRANSFER MADE TO THE ACCOUNT  MAINTAINED BY THE EXCHANGE  AGENT
     WITH DTC AND COMPLETE THE FOLLOWING:

     Name of Tendering Institution ____________________________________________

     DTC Account Number _______________________________________________________

     Transaction Code Number __________________________________________________

[ ]  CHECK HERE AND ENCLOSE A PHOTOCOPY OF THE NOTICE OF GUARANTEED  DELIVERY IF
     TENDERED OLD CAPITAL SECURITIES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
     GUARANTEED  DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE
     FOLLOWING:

     Name of Registered Holder(s)______________________________________________

     Window Ticket Number (if any)_____________________________________________

     Date of Execution of Notice of Guaranteed Delivery________________________

     Name of Institution which Guaranteed Delivery_____________________________

         If Guaranteed Delivered is to be made By Book-Entry Transfer:

                  Name of Tendering Institution________________________________

                  DTC Account Number___________________________________________

                  Transaction Code Number______________________________________


[ ]  CHECK HERE IF TENDERED BY BOOK-ENTRY TRANSFER AND NON-EXCHANGED OLD CAPITAL
     SECURITIES ARE TO BE RETURNED BY CREDITING THE DTC ACCOUNT NUMBER SET FORTH
     ABOVE.

[ ]  CHECK  HERE  IF YOU  ARE A  BROKER-DEALER  WHO  ACQUIRED  THE  OLD  CAPITAL
     SECURITIES  FOR ITS OWN  ACCOUNT  AS A RESULT  OF  MARKET  MAKING  OR OTHER
     TRADING ACTIVITIES (A "PARTICIPATING BROKER-DEALER") AND WISH TO RECEIVE 10
     ADDITIONAL  COPIES OF THE  PROSPECTUS  AND 10 COPIES OF ANY  AMENDMENTS  OR
     SUPPLEMENTS THERETO.

     Name:_____________________________________________________________________

     Address: _________________________________________________________________

              _________________________________________________________________


                                        3





Ladies and Gentlemen:

         The  undersigned  hereby  tenders  to Markel  Capital  Trust I, a trust
formed  under  the laws of the  State of  Delaware  (the  "Trust"),  and  Markel
Corporation,  a Virginia corporation,  (the "Corporation"),  the above described
aggregate  Liquidation  Amount of the Trust's 8.71% Series A Capital  Securities
(the "Old  Capital  Securities")  in exchange for a like  aggregate  Liquidation
Amount of the  Trust's  8.71%  Series B  Capital  Securities  (the "New  Capital
Securities")  which have been  registered  under the Securities Act of 1933 (the
"Securities Act"), upon the terms and subject to the conditions set forth in the
Prospectus  dated May __, 1997 (as the same may be amended or supplemented  from
time to time, the "Prospectus"),  receipt of which is acknowledged,  and in this
Letter of Transmittal  (which,  together with the  Prospectus,  constitutes  the
"Exchange Offer").

         Subject to and effective upon the acceptance for exchange of all or any
portion of the Old Capital  Securities  tendered herewith in accordance with the
terms and conditions of the Exchange Offer (including,  if the Exchange Offer is
extended  or  amended,  the  terms  and  conditions  of any  such  extension  or
amendment),  the undersigned hereby sells,  assigns and transfers to or upon the
order of the Trust all  right,  title and  interest  in and to such Old  Capital
Securities as are being tendered  herewith.  The undersigned  hereby irrevocably
constitutes  and appoints the Exchange  Agent as its agent and  attorney-in-fact
(with full  knowledge  that the  Exchange  Agent is also  acting as agent of the
Corporation and the Trust in connection with the Exchange Offer) with respect to
the tendered Old Capital Securities, with full power of substitution (such power
of attorney being deemed to be an  irrevocable  power coupled with an interest),
subject  only to the right of  withdrawal  described in the  Prospectus,  to (i)
deliver  Certificates for Old Capital Securities to the Corporation or the Trust
together with all  accompanying  evidences of transfer and  authenticity  to, or
upon the order of,  the  Trust,  upon  receipt  by the  Exchange  Agent,  as the
undersigned's  agent, of the New Capital Securities to be issued in exchange for
such Old Capital  Securities,  (ii)  present  Certificates  for such Old Capital
Securities for transfer, and to transfer the Old Capital Securities on the books
of the Trust,  and (iii)  receive for the account of the Trust all  benefits and
otherwise  exercise  all  rights of  beneficial  ownership  of such Old  Capital
Securities,  all in  accordance  with the terms and  conditions  of the Exchange
Offer.

         The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender,  exchange, sell, assign and transfer the Old
Capital  Securities  tendered  hereby and that,  when the same are  accepted for
exchange,  the Trust  will  acquire  good,  marketable  and  unencumbered  title
thereto,  free and clear of all liens,  restrictions,  charges and encumbrances,
and that the Old  Capital  Securities  tendered  hereby  are not  subject to any
adverse  claims or proxies.  The  undersigned  will,  upon request,  execute and
deliver any additional  documents  deemed by the  Corporation,  the Trust or the
Exchange Agent to be necessary or desirable to complete the exchange, assignment
and transfer of the Old Capital Securities  tendered hereby, and the undersigned
will comply with its obligations under the Registration  Rights  Agreement.  The
undersigned has read and agrees to all of the terms of the Exchange Offer.

         The name(s) and  address(es)  of the  registered  holder(s)  of the Old
Capital  Securities  tendered  hereby should be printed  above,  if they are not
already set forth above, as they appear on the  Certificates  representing  such
Old Capital Securities. The Certificate number(s) and the Old Capital Securities
that the  undersigned  wishes to tender  should be indicated in the  appropriate
boxes above.

         If any tendered Old Capital  Securities  are not exchanged  pursuant to
the Exchange Offer for any reason, or if Certificates are submitted for more Old
Capital Securities than are tendered or accepted for exchange,  Certificates for
such nonexchanged or nontendered Old Capital Securities will be returned (or, in
the case of Old Capital  Securities  tendered by book-entry  transfer,  such Old
Capital  Securities will be credited to an account  maintained at DTC),  without
expense  to  the  tendering  holder,   promptly   following  the  expiration  or
termination of the Exchange Offer.

         The  undersigned  understands  that  tenders of Old Capital  Securities
pursuant   to  any  one  of  the   procedures   described   in   "The   Exchange
Offer--Procedures for Tendering Old Capital Securities" in the Prospectus and in
the instruction  will,  upon the  Corporation's  and the Trust's  acceptance for
exchange of such tendered Old Capital Securities, constitute a binding agreement
between  the  undersigned,  the  Corporation  and the  Trust  upon the terms and
subject to the  conditions of the Exchange  Offer.  The  undersigned  recognizes
that, under certain  circumstances set forth in the Prospectus,  the Corporation
and the Trust may not be required to accept for  exchange any of the Old Capital
Securities tendered hereby.



                                        4





         Unless otherwise indicated herein in the box entitled "Special Issuance
Instructions"  below,  the  undersigned  hereby  directs  that  the New  Capital
Securities  be issued in the  name(s)  of the  undersigned  or, in the case of a
book-entry transfer of Old Capital Securities,  that such New Capital Securities
be credited to the account  indicated  above  maintained at DTC. If  applicable,
substitute Certificates representing Old Capital Securities not exchanged or not
accepted for  exchange  will be issued to the  undersigned  or, in the case of a
book-entry transfer of Old Capital  Securities,  will be credited to the account
indicated above maintained at DTC.  Similarly,  unless otherwise indicated under
"Special Delivery  Instructions,"  please deliver New Capital  Securities to the
undersigned at the address shown below the undersigned's signature.

         By  tendering  Old  Capital  Securities  and  executing  this Letter of
Transmittal,   the  undersigned  hereby  represents  and  agrees  that  (i)  the
undersigned is not an "affiliate" of the Corporation or the Trust,  (ii) any New
Capital  Securities to be received by the  undersigned are being acquired in the
ordinary  course of its business,  (iii) the  undersigned  has no arrangement or
understanding  with any person to  participate in the  distribution  (within the
meaning of the Securities  Act) of New Capital  Securities to be received in the
Exchange  Offer,  and  (iv)  if  the  undersigned  is not a  broker-dealer,  the
undersigned  is not engaged in, and does not intend to engage in, a distribution
(within the meaning of the Securities  Act) of such New Capital  Securities.  By
tendering Old Capital  Securities  pursuant to the Exchange  Offer and executing
this  Letter of  Transmittal,  a holder  of Old  Capital  Securities  which is a
broker-dealer  represents  and  agrees,  consistent  with  certain  interpretive
letters  issued by the  staff of the  Division  of  Corporation  Finance  of the
Securities and Exchange  Commission to third parties,  that (a) such Old Capital
Securities held by the broker-dealer are held only as a nominee, or (b) such Old
Capital  Securities were acquired by such broker-dealer for its own account as a
result of  market-making  activities  or other  trading  activities  and it will
deliver the  Prospectus (as amended or  supplemented  from time to time) meeting
the requirements of the Securities Act in connection with any resale of such New
Capital  Securities  (provided  that,  by so  acknowledging  and by delivering a
Prospectus,  such  broker-dealer  will  not be  deemed  to  admit  that it is an
"underwriter" within the meaning of the Securities Act).

         The  Corporation  and  the  Trust  have  agreed  that,  subject  to the
provisions of the Registration  Rights Agreement,  the Prospectus,  as it may be
amended  or  supplemented  from  time to  time,  may be used by a  Participating
Broker-Dealer  (as  defined  below) in  connection  with  resales of New Capital
Securities  received in  exchange  for Old  Capital  Securities,  where such Old
Capital Securities were acquired by such Participating  BrokerDealer for its own
account as a result of market-making activities or other trading activities, for
a period ending 90 days after the  Expiration  Date (subject to extension  under
certain limited circumstances  described in the Prospectus) or, if earlier, when
all such New Capital  Securities  have been  disposed  of by such  Participating
BrokerDealer.  In that  regard,  each  broker-dealer  who  acquired  Old Capital
Securities for its own account and as a result of market-making or other trading
activities  (a  "Participating  Broker-Dealer"),  by tendering  such Old Capital
Securities and executing this Letter of  Transmittal,  agrees that, upon receipt
of notice from the  Corporation  or the Trust of the  occurrence of any event or
the discovery of any fact which makes any statement contained or incorporated by
reference therein, in light of the circumstances under which they were made, not
misleading  or of the  occurrence  of  certain  other  events  specified  in the
Registration Rights Agreement, such Participating  BrokerDealer will suspend the
sale of New Capital Securities  pursuant to the Prospectus until the Corporation
and the Trust have  amended  or  supplemented  the  Prospectus  to correct  such
misstatement or omission and has furnished copies of the amended or supplemented
Prospectus to the  Participating  Broker-Dealer  or the Corporation or the Trust
has given notice that the sale of the New Capital Securities may be resumed,  as
the case may be. If the  Corporation  or the Trust  gives such Notice to suspend
the sale of the New  Capital  Securities,  it shall  extend  the 90- day  period
referred to above during which Participating  Broker-Dealers are entitled to use
the  Prospectus in connection  with the resale of New Capital  Securities by the
number of days  during the period from and  including  the date of the giving of
such notice to and including the date when  Participating  Broker-Dealers  shall
have received  copies of the  supplemented  or amended  Prospectus  necessary to
permit  resales of the New Capital  Securities  or to and  including the date on
which the Corporation or the Trust has given notice that the sale of New Capital
Securities may be resumed, as the case may be.

         As a result,  a  Participating  Broker-Dealer  who  intends  to use the
Prospectus  in  connection  with resales of New Capital  Securities  received in
exchange for Old Capital  Securities  pursuant to the Exchange Offer must notify
the  Corporation  and the Trust,  or cause the  Corporation  and the Trust to be
notified,  on or  prior  to the  Expiration  Date,  that  it is a  Participating
Broker-Dealer.  Such notice may be given in the space  provided  above or may be
delivered to the Exchange Agent at the address set forth in the Prospectus under
"The Exchange Offer--Exchange Agent."


                                        5





         Holders of Old  Capital  Securities  whose Old Capital  Securities  are
accepted  for  exchange  will not  receive  Distributions  on such  Old  Capital
Securities and the undersigned  waives the right to receive any  Distribution on
such Old  Capital  Securities  accumulated  from and  after  January  13,  1997.
Accordingly,  holders of New  Capital  Securities  as of the record date for the
payment  of  Distributions  on July 1, 1997 will be  entitled  to  Distributions
accumulated from and after January 13, 1997.

         All authority herein conferred or agreed to be conferred in this Letter
of Transmittal  shall survive the death or incapacity of the undersigned and any
obligation  of the  undersigned  hereunder  shall be  binding  upon  the  heirs,
executors,  administrators,  personal  representatives,  trustees in bankruptcy,
legal  representatives,  successors  and assigns of the  undersigned.  Except as
stated in the Prospectus, this tender is irrevocable.



                                        6





 
- -------------------------------------------------------------------------------------
|                           HOLDER(S) SIGN HERE (See                                 |
|                           Instructions 2, 5 and 6)                                 |
|                  (Please Complete Substitute Form W-9 Below)                       |
|     (Note: Signature(s) must be guaranteed if required by Instruction 2)           |
|                                                                                    |
|    Must be signed by  registered  holder(s)  exactly as name(s)  appear(s)  on     |
|  certificates(s)  for the Old Capital Securities hereby tendered or on a security  |
|  position  listing,  or by any  person(s)  authorized  to become  the  registered  |
|  holder(s) by endorsements  and documents  transmitted  herewith  (including such  |
|  opinions of counsel,  certificates  and other  information as may be required by  |
|  the Trust or the  Trustee  for the Old  Capital  Securities  to comply  with the  |
|  restrictions on transfer applicable to the Old Capital Securities). If signature  |
|  is by an attorney-in-fact,  executor, administrator,  trustee, guardian, officer  |
|  of a corporation  or another  acting in a fiduciary  capacity or  representative  |
|  capacity, please set forth the signer's full title. See Instruction 5.            |
|                                                                                    |
|                                                                                    |
|                                                                                    |
|                                                                                    |
|  _______________________________________________________________________________   |
|                                                                                    |
|  _______________________________________________________________________________   |
|                             (Signature(s) of Holder(s))                            |
|                                                                                    |
|  Date___________________, 1997                                                     |
|                                                                                    |
|  Name(s) _______________________________________________________________________   |
|                                   (Please Print)                                   |
|  _______________________________________________________________________________   |
|                                                                                    |
|                                                                                    |
|  Area Code(s) and Telephone Number _____________________________________________   |
|                                                                                    |
|                                                                                    |
|  _______________________________________________________________________________   |
|                  (Tax Identification or Social Security Number(s))                 |
|                                                                                    |
|                                                                                    |
|                           GUARANTEE OF SIGNATURE(S) (See                           |
|                                Instructions 2 and 5)                               |
|                                                                                    |
|  Authorized Signature  _________________________________________________________   |
|                                                                                    |
|                                                                                    |
|  Name __________________________________________________________________________   |
|                                   (Please Print)                                   |
|                                                                                    |
|  Date___________________, 1997                                                     |
|                                                                                    |
|  Capacity or Title _____________________________________________________________   |
|                                                                                    |
|                                                                                    |
|  Name of Firm  _________________________________________________________________   |
|                                                                                    |
|                                                                                    |
|  Address _______________________________________________________________________   |
|                                 (Include Zip Code)                                 |
|                                                                                    |
|  Area Code and Telephone Number ________________________________________________   |
|                                                                                    |
- --------------------------------------------------------------------------------------








                                        7




 
- -------------------------------------------------------    ---------------------------------------------------------
|  SPECIAL ISSUANCE INSTRUCTIONS                       |   |  SPECIAL DELIVERY INSTRUCTIONS                        |
|  (See Instructions 1, 5 and 6)                       |   |  (See Instructions 1, 5 and 6)                        |
|                                                      |   |                                                       |
|  To be completed ONLY if New Capital Securities are  |   |  To be completed ONLY if New Capital Securities are   |
|  to be issued in the name of someone other than the  |   |  to be sent to someone  other  than the  registered   |
|  registered  holder of the Old  Capital  Securities  |   |  holder of the Old Capital Securities whose name(s)   |
|  whose name(s) appear(s) above.                      |   |  appear(s) above, or to the registered holder(s) at   |
|                                                      |   |  an address other than that shown above.              |
|  Issue:                                              |   |                                                       |
|                                                      |   |  Mail:                                                |
|  [ ] New Capital Securities to:                      |   |                                                       |
|  [ ] Old Capital Securities not tendered to:         |   |  [ ] New Capital Securities to:                       |
|                                                      |   |  [ ] Old Capital Securities not tendered to:          |
|  Name____________________________________________    |   |                                                       |
|                 (Please Print)                       |   |  Name____________________________________________     |
|                                                      |   |                 (Please Print)                        |
|  Address_________________________________________    |   |                                                       |
|                                                      |   |  Address_________________________________________     |
|  ________________________________________________    |   |                                                       |
|                                                      |   |  ________________________________________________     |
|  ________________________________________________    |   |                                                       |
|               (Include Zip Code)                     |   |  ________________________________________________     |
|                                                      |   |               (Include Zip Code)                      |
|  ________________________________________________    |   |                                                       |
|  (Taxpayer Identification or Social Security No.)    |   |  ________________________________________________     |
|                                                      |   |  (Taxpayer Identification or Social Security No.)     |
|                                                      |   |                                                       |
- -------------------------------------------------------    ---------------------------------------------------------


                                       8





                                  INSTRUCTIONS

         Forming Part of the Terms and Conditions of the Exchange Offer



1.  Delivery of Letter of  Transmittal  and  Certificates;  Guaranteed  Delivery
Procedures.  This Letter of Transmittal is to be completed either if (a) tenders
are to be made pursuant to the procedures for tender by book-entry  transfer set
forth in "The Exchange  Offer--Procedures  for Tendering Old Capital Securities"
in the  Prospectus  or (b)  Certificates  are to be forwarded  herewith.  Timely
confirmation  of a book-entry  transfer of such Old Capital  Securities into the
Exchange  Agent's  account at DTC,  or  Certificates  as well as this  Letter of
Transmittal (or facsimile thereof),  properly completed and duly executed,  with
any required  signature  guarantees,  and any other  documents  required by this
Letter of  Transmittal,  must be received by the Exchange Agent at its addresses
set forth herein on or prior to the Expiration Date. Old Capital  Securities may
be tendered in whole or in part in the principal amount of $100,000 (100 Capital
Securities) and integral  multiples of $1,000 in excess thereof,  provided that,
if any Old Capital  Securities  are tended for exchange in part,  the untendered
principal  amount  thereof  must be $100,000  (100  Capital  Securities)  or any
integral multiple of $1,000 in excess thereof.

         Holders  who wish to tender  their Old Capital  Securities  and (i) who
cannot  complete the procedures for delivery by book-entry  transfer on a timely
basis, may tender their Old Capital  Securities by properly  completing and duly
executing a Notice of Guaranteed  Delivery  pursuant to the guaranteed  delivery
procedures  set  forth in "The  Exchange  Offer--Procedures  for  Tendering  Old
Capital  Securities"  in the  Prospectus  or (ii) who cannot  deliver  their Old
Capital Securities,  this Letter of Transmittal and all other required documents
to the  Exchange  Agent on or prior to the  Expiration  Date or (iii)  whose Old
Capital Securities are not immediately available must use a Notice of Guaranteed
Delivery and follow the related  procedures.  Pursuant to such  procedures:  (a)
such  tender  must be made by or through an  Eligible  Institution  (as  defined
below);  (b) a  properly  completed  and  duly  executed  Notice  of  Guaranteed
Delivery,  substantially  in the form made  available  by the  Company,  must be
received by the Exchange Agent on or prior to the  Expiration  Date; and (c) the
Certificates  (or a  book-entry  confirmation  (as  defined in the  Prospectus))
representing  tendered  Old Capital  Securities,  in proper  form for  transfer,
together with a Letter of Transmittal (or facsimile thereof), properly completed
and  duly  executed,  with  any  required  signature  guarantees  and any  other
documents  required  by this  Letter of  Transmittal,  must be  received  by the
Exchange Agent within three New York Stock Exchange, Inc. trading days after the
date of execution of such Notice of Guaranteed Delivery, all as provided in "The
Exchange   Offer--Procedures  for  Tendering  Old  Capital  Securities"  in  the
Prospectus.

         The  Notice  of  Guaranteed  Delivery  may  be  delivered  by  hand  or
transmitted  by  facsimile  or mail to the  Exchange  Agent,  and must include a
guarantee by an Eligible  Institution in the form set forth in such Notice.  For
Old Capital  Securities  to be  properly  tendered  pursuant  to the  guaranteed
delivery  procedure,  the  Exchange  Agent must  receive a Notice of  Guaranteed
Delivery  on or  prior  to  the  Expiration  Date.  As  used  herein  and in the
Prospectus,  "Eligible  Institution"  means a firm or other entity identified in
Rule 17Ad-15  under the Exchange  Act as "an  eligible  guarantor  institution,"
including (as such terms are defined therein) (i) a bank; (ii) a broker, dealer,
municipal securities broker or dealer or government securities broker or dealer;
(iii) a credit union; (iv) a national securities exchange, registered securities
association  or  clearing  agency;  or  (v)  a  savings  association  that  is a
participant in a Securities Transfer Association.

THE METHOD OF DELIVERY OF CERTIFICATES, THIS LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED  DOCUMENTS IS AT THE OPTION AND SOLE RISK OF THE  TENDERING  HOLDER AND
THE  DELIVERY  WILL BE DEEMED MADE ONLY WHEN  ACTUALLY  RECEIVED BY THE EXCHANGE
AGENT. IF DELIVERY IS BY MAIL,  REGISTERED  MAIL WITH RETURN RECEIPT  REQUESTED,
PROPERLY INSURED,  OR OVERNIGHT  DELIVERY SERVICE IS RECOMMENDED.  IN ALL CASES,
SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.

         Neither  the  Corporation  nor the Trust will  accept any  alternative,
conditional  or contingent  tenders.  Each tendering  holder,  by execution of a
Letter of Transmittal  (or facsimile  thereof),  waives any right to receive any
notice of the acceptance of such tender.

         2.  Guarantee of Signatures.  No signature  guarantee on this Letter of
Transmittal is required if:

         (i) this  Letter of  Transmittal  is signed  by the  registered  holder
(which term, for purposes of this document, shall include any participant in DTC
whose  name  appears  on a  security  position  listing  as the owner of the Old
Capital  Securities) of Old Capital Securities  tendered  herewith,  unless such


                                        9





holder(s) has completed either the box entitled "Special Issuance  Instructions"
or the box entitled "Special Delivery Instructions" above, or

        (ii) such Old Capital  Securities are tendered for the account of a firm
that is an Eligible Institution.

         In  all  other  cases,  an  Eligible  Institution  must  guarantee  the
signature(s) on this Letter of Transmittal. See Instruction 5.

         3.  Inadequate  Space.  If the  space  provided  in the  box  captioned
"Description of Old Capital Securities" is inadequate, the Certificate number(s)
and/or the principal  amount of Old Capital  Securities  and any other  required
information  should be listed on a separate signed schedule which is attached to
this Letter of Transmittal.

         4.  Partial  Tenders  and  Withdrawal  Rights.  Tenders of Old  Capital
Securities  will be  accepted  only in the  principal  amount of  $100,000  (100
Capital Securities) and integral multiples of $1,000 in excess thereof, provided
that if any Old Capital  Securities  are  tendered  for  exchange  in part,  the
untendered principal amount thereof must be $100,000 (100 Capital securities) or
any  integral  multiple  of $1,000 in excess  thereof.  If less than all the Old
Capital  Securities  evidenced by any Certificate  submitted are to be tendered,
fill in the principal amount of Old Capital  Securities which are to be tendered
in the box entitled  "Principal Amount of Old Capital  Securities  Tendered." In
such case, new  Certificate(s)  for the remainder of the Old Capital  Securities
that were evidenced by your Old  Certificate(s)  will only be sent to the holder
of the Old Capital Security, promptly after the Expiration Date. All Old Capital
Securities  represented by Certificates  delivered to the Exchange Agent will be
deemed to have been tendered unless otherwise indicated.

         Except as otherwise provided herein,  tenders of Old Capital Securities
may be withdrawn at any time on or prior to the Expiration  Date. In order for a
withdrawal  to be effective  on or prior to that time,  a written,  telegraphic,
telex or  facsimile  transmission  of such notice of  withdrawal  must be timely
received by the Exchange Agent at one of its addresses set forth above or in the
Prospectus  on or prior to the  Expiration  Date.  Any such notice of withdrawal
must specify the name of the person who tendered the Old Capital  Securities  to
be withdrawn,  the aggregate  principal  amount of Old Capital  Securities to be
withdrawn,  and (if Certificates for Old Capital  Securities have been tendered)
the name of the registered holder of the Old Capital  Securities as set forth on
the  Certificate for the Old Capital  Securities,  if different from that of the
person who tendered such Old Capital  Securities.  If  Certificates  for the Old
Capital  Securities have been delivered or otherwise  identified to the Exchange
Agent,  then  prior to the  physical  release of such  Certificates  for the Old
Capital Securities, the tendering holder must submit the serial numbers shown on
the particular  Certificates for the Old Capital  Securities to be withdrawn and
the  signature on the notice of  withdrawal  must be  guaranteed  by an Eligible
Institution,  except  in the case of Old  Capital  Securities  tendered  for the
account of an Eligible Institution. If Old Capital Securities have been tendered
pursuant to the procedures  for  book-entry  transfer set forth in "The Exchange
Offer--Procedures   for  Tendering  Old  Capital   Securities,"  the  notice  of
withdrawal must specify the name and number of the account at DTC to be credited
with  the  withdrawal  of Old  Capital  Securities,  in which  case a notice  of
withdrawal  will be effective  if  delivered  to the Exchange  Agent by written,
telegraphic,  telex or  facsimile  transmission.  Withdrawals  of tenders of Old
Capital  Securities  may  not be  rescinded.  Old  Capital  Securities  properly
withdrawn  will not be deemed  validly  tendered  for  purposes of the  Exchange
Offer,  but  may be  retendered  at  any  subsequent  time  on or  prior  to the
Expiration  Date by following any of the procedures  described in the Prospectus
under "The Exchange Offer--Procedures for Tendering Old Capital Securities."

         All questions as to the validity,  form and eligibility (including time
of receipt) of such withdrawal notices will be determined by the Corporation and
the Trust,  in their sole  discretion,  whose  determination  shall be final and
binding on all parties.  Neither the  Corporation,  the Trust, any affiliates or
assigns of the  Corporation  and the  Trust,  the  Exchange  Agent nor any other
person shall be under any duty to give any notification of any irregularities in
any notice of  withdrawal  or incur any  liability  for failure to give any such
notification.  Any Old Capital Securities which have been tendered but which are
withdrawn  will be returned to the holder  thereof  without  cost to such holder
promptly after withdrawal.

         5. Signatures on Letter of Transmittal,  Assignments and  Endorsements.
If this Letter of Transmittal  is signed by the registered  holder(s) of the Old
Capital  Securities  tendered hereby,  the signature(s) must correspond  exactly
with  the  name(s)  as  written  on  the  face  of  the  Certificate(s)  without
alteration, enlargement or any change whatsoever.

         If any of the Old  Capital  Securities  tendered  hereby  are  owned of
record by two or more joint  owners,  all such  owners  must sign this Letter of
Transmittal.



                                       10





         If any  tendered Old Capital  Securities  are  registered  in different
name(s) on several  Certificates,  it will be necessary  to  complete,  sign and
submit as many separate Letters of Transmittal (or facsimiles  thereof) as there
are different registrations of Certificates.

         If this Letter of  Transmittal or any  Certificates  or bond powers are
signed by trustees,  executors,  administrators,  guardians,  attorneys-in-fact,
officers  of  corporations  or others  acting in a fiduciary  or  representative
capacity,  such persons  should so indicate  when signing and must submit proper
evidence   satisfactory  to  the  Corporation  and  the  Trust,  in  their  sole
discretion, of such persons' authority to so act.

         When this Letter of Transmittal is signed by the registered owner(s) of
the Old Capital  Securities listed and transmitted  hereby, no endorsement(s) of
Certificate(s)  or  separate  bond  power(s)  are  required  unless New  Capital
Securities  are to be issued in the name of a person  other than the  registered
holder(s).  Signature(s)  on  such  Certificate(s)  or  bond  power(s)  must  be
guaranteed by an Eligible Institution.

         If this  Letter of  Transmittal  is signed by a person  other  than the
registered  owner(s) of the Old Capital Securities listed, the Certificates must
be endorsed or  accompanied by  appropriate  bond powers,  signed exactly as the
name or names of the registered owner(s) appear(s) on the Certificates, and also
must be  accompanied  by such  opinions  of  counsel,  certifications  and other
information  as the  Corporation,  the Trust or the  Trustee for the Old Capital
Securities  may  require  in  accordance  with  the   restrictions  on  transfer
applicable to the Old Capital  Securities.  Signatures on such  Certificates  or
bond powers must be guaranteed by an Eligible Institution.

         6.  Special  Issuance  and  Delivery   Instructions.   If  New  Capital
Securities  are to be issued in the name of a person  other  than the  signer of
this  Letter of  Transmittal,  or if New  Capital  Securities  are to be sent to
someone  other than the signer of this  Letter of  Transmittal  or to an address
other than that shown above, the appropriate boxes on this Letter of Transmittal
should be completed.  Certificates for Old Capital Securities not exchanged will
be returned by mail or, if tendered by  book-entry  transfer,  by crediting  the
account indicated above maintained at DTC. See Instruction 4.

         7.  Irregularities.  The Corporation  and the Trust will determine,  in
their sole  discretion,  all  questions as to the form of  documents,  validity,
eligibility  (including  time of receipt)  and  acceptance  for  exchange of any
tender of Old Capital Securities which  determination shall be final and binding
on all parties.  The  Corporation  and the Trust reserve the absolute  right, in
their sole and absolute discretion,  to reject any and all tenders determined by
either of them not to be in proper form or the acceptance of which,  or exchange
for, may, in the view of counsel to the  Corporation and the Trust, be unlawful.
The  Corporation  and the Trust also  reserve  the  absolute  right,  subject to
applicable  law, to waive any of the  conditions of the Exchange Offer set forth
in the Prospectus under "The Exchange Offer--Certain  Conditions to the Exchange
Offer" or any conditions or irregularity in any tender of Old Capital Securities
of any particular holder whether or not similar conditions or irregularities are
waived  in the  case  of  other  holders.  The  Corporation's  and  the  Trust's
interpretation of the terms and conditions of the Exchange Offer (including this
Letter of Transmittal and the instructions hereto) will be final and binding. No
tender of Old Capital  Securities will be deemed to have been validly made until
all  irregularities  with  respect  to such  tender  have been  cured or waived.
Neither  the   Corporation,   the  Trust,  any  affiliates  or  assigns  of  the
Corporation,  the Trust,  the Exchange Agent, or any other person shall be under
any duty to give  notification  of any  irregularities  in  tenders or incur any
liability for failure to give such notification.

         8. Questions,  Requests for Assistance and Additional Copies. Questions
and requests for assistance may be directed to the Exchange Agent at its address
and  telephone  number  set  forth on the front of this  Letter of  Transmittal.
Additional  copies of the Prospectus,  this Letter of Transmittal and the Notice
of  Guaranteed  Delivery may be obtained  from the  Exchange  Agent or from your
broker, dealer, commercial bank, trust company or other nominee.

         9. 31% Backup  Withholding;  Substitute  Form W-9.  Under U.S.  Federal
income tax law, a holder whose tendered Old Capital  Securities are accepted for
exchange is required to provide the Exchange  Agent with such  holder's  correct
taxpayer  identification  number  ("TIN") on Substitute  Form W-9 below.  If the
Exchange  Agent is not  provided  with the correct  TIN,  the  Internal  Revenue
Service (the "IRS") may subject the holder or other payee to a $50  penalty.  In
addition,  payments to such  holders or other payees with respect to Old Capital
Securities exchanged pursuant to the Exchange Offer may be subject to 31% backup
withholding.

         The box in Part 2 of the  Substitute  Form  W-9 may be  checked  if the
tendering  holder has not been issued a TIN and has applied for a TIN or intends
to apply  for a TIN in the near  future.  If the box in Part 2 is  checked,  the
holder or other payee must also complete the  Certificate  of Awaiting  Taxpayer
Identification Number below in order to avoid backup withholding.


                                       11





Notwithstanding  that  the  box in Part 2 is  checked  and  the  Certificate  of
Awaiting Taxpayer  Identification  Number is completed,  the Exchange Agent will
withhold 31% of all payments made prior to the time a properly  certified TIN is
provided to the  Exchange  Agent.  The  Exchange  Agent will retain such amounts
withheld during the 60 day period following the date of the Substitute Form W-9.
If the holder furnishes the Exchange Agent with its TIN within 60 days after the
date of the Substitute  Form W-9, the amounts  retained during the 60 day period
will be  remitted  to the holder and no further  amounts  shall be  retained  or
withheld from payments made to the holder  thereafter.  If, however,  the holder
has not  provided  the  Exchange  Agent with its TIN within  such 60 day period,
amounts withheld will be remitted to the IRS as backup withholding. In addition,
31% of all  payments  made  thereafter  will be withheld and remitted to the IRS
until a correct TIN is provided.

         The holder is required to give the Exchange Agent the TIN (e.g., social
security number or employer  identification  number) of the registered  owner of
the Old Capital Securities or of the last transferee  appearing on the transfers
attached  to, or  endorsed  on, the Old Capital  Securities.  If the Old Capital
Securities  are  registered  in more than one name or are not in the name of the
actual owner,  consult the enclosed  "Guidelines for  Certification  of Taxpayer
Identification  Number on Substitute Form W-9" for additional  guidance on which
number to report.

         Certain  holders  (including,  among  others,  corporations,  financial
institutions  and certain  foreign  persons)  may not be subject to these backup
withholding  and  reporting  requirements.   Such  holders  should  nevertheless
complete the attached  Substitute Form W-9 below, and write "exempt" on the face
thereof,  to avoid possible erroneous backup  withholding.  A foreign person may
qualify as an exempt recipient by submitting a properly  completed IRS Form W-8,
signed under  penalties of perjury,  attesting to that holder's  exempt  status.
Please  consult  the  enclosed   "Guidelines  for   Certification   of  Taxpayer
Identification  Number on Substitute Form W-9" for additional  guidance on which
holders are exempt from backup withholding.

         Backup  withholding  is not an  additional  U.S.  Federal  income  tax.
Rather,  the U.S.  Federal  income tax  liability of a person  subject to backup
withholding  will be  reduced  by the  amount of tax  withheld.  If  withholding
results in an overpayment of taxes, a refund may be obtained.

         10.  Lost,  Destroyed  or Stolen  Certificates.  If any  Certificate(s)
representing  Old Capital  Securities have been lost,  destroyed or stolen,  the
holder  should  promptly  notify the  Exchange  Agent.  The holder  will then be
instructed  as to the  steps  that  must  be  taken  in  order  to  replace  the
Certificate(s).  This  Letter of  Transmittal  and related  documents  cannot be
processed  until  the  procedures  for  replacing  lost,   destroyed  or  stolen
Certificate(s) have been followed.

         11.  Security  Transfer  Taxes.  Holders  who tender  their Old Capital
Securities  for exchange  will not be  obligated  to pay any  transfer  taxes in
connection  therewith.  If, however,  New Capital Securities are to be delivered
to, or are to be issued in the name of,  any person  other  than the  registered
holder of the Old Capital Securities  tendered,  or if a transfer tax is imposed
for any reason other than the exchange of Old Capital  Securities  in connection
with the  Exchange  Offer,  then the amount of any such  transfer  tax  (whether
imposed on the  registered  holder or any other  persons) will be payable by the
tendering holder. If satisfactory evidence of payment of such taxes or exemption
therefrom is not submitted  with the Letter of  Transmittal,  the amount of such
transfer taxes will be billed directly to such tendering holder.

         Important:  This Letter of Transmittal  (or facsimile  thereof) and all
other  required  documents must be received by the Exchange Agent on or prior to
the Expiration Date.




                                       12




                                                 TO BE COMPLETED BY ALL
                                               TENDERING SECURITY HOLDERS
                                                   (See Instruction 9)

                                          PAYER'S NAME:  Markel Capital Trust I

 
- ---------------------------------------------------------------------------------------------------------------------|
|            SUBSTITUTE            | Part 1 - PLEASE PROVIDE YOUR            | TIN________________________           |
|             Form W-9             | TIN IN THE BOX AT RIGHT AND             |      Social Security Number or        |
|                                  | CERTIFY BY SIGNING AND                  |    Employer Identification Number     |
|                                  | DATING BELOW                            |                                       |
|                                  | ------------------------------------------------------------------------------- |
|    Department of the Treasury                                              | Part 2                                |
|     Internal Revenue Service                                               |    Awaiting TIN [ ]                   |
|                                                                            | ------------------------------------- |
|                                                                                                                    |
|                                     CERTIFICATION  - UNDER THE PENALTIES OF PERJURY,  I CERTIFY THAT (1) the number|
|                                     shown  on this  form is my  correct  taxpayer  identification  number  (or I am|
|                                     waiting  for a number  to be  issued  to me),  (2) I am not  subject  to backup|
|                                     withholding either because (i) I am exempt from backup withholding, (ii) I have|
|                                     not been notified by the Internal  Revenue Service ("IRS") that I am subject to|
|                                     backup  withholding  as a  result  of a  failure  to  report  all  interest  or|
|                                     dividends,  or (iii) the IRS has  notified  me that I am no longer  subject  to|
|                                     backup withholding, and (3) any other information provided on this form is true|
|                                     and correct.                                                                   |
|                                                                                                                    |
|   Payer's Request for Taxpayer     SIGNATURE_________________________________________________                      |
|    Identification Number (TIN)     DATE_______________________________________________________                     |
|         and Certification                                                                                          |
|                                    You must  cross out item  (iii) in Part (2)                                     |
|                                    above if you have been  notified by the IRS                                     |
|                                    that you are subject to backup  withholding                                     |
|                                    because  of  under  reporting  interest  or                                     |
|                                    dividends  on your tax  return and you have                                     |
|                                    not been  notified  by the IRS that you are                                     |
|                                    no longer subject to backup withholding.                                        |
- ---------------------------------------------------------------------------------------------------------------------


NOTE:    FAILURE TO COMPLETE  AND RETURN THIS FORM MAY IN CERTAIN  CIRCUMSTANCES
         RESULT IN BACKUP WITHHOLDING OF 31% OF ANY AMOUNTS PAID TO YOU PURSUANT
         TO THE  EXCHANGE  OFFER.  PLEASE  REVIEW THE  ENCLOSED  GUIDELINES  FOR
         CERTIFICATION OF TAXPAYER  IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9
         FOR ADDITIONAL DETAILS.

| -----------------------------------------------------------------------------|
|            CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER            |
|                                                                              |
|      I certify  under  penalties of perjury  that a taxpayer  identification |
| number has not been issued to me, and either (1) I have mailed or  delivered |
| an  application  to  receive  a  taxpayer   identification   number  to  the |
| appropriate   Internal   Revenue   Service   Center   or   Social   Security |
| Administration  Office or (2) I intend to mail or deliver an  application in |
| the  near  future.  I  understand  that  if  I do  not  provide  a  taxpayer |
| identification number by the time of payment, 31% of all payments made to me |
| on account of the New Capital Securities shall be retained until I provide a |
| taxpayer  identification  number to the Exchange Agent and that, if I do not |
| provide my taxpayer  identification  number  within 60 days,  such  retained |
| amounts  shall  be  remitted  to the  Internal  Revenue  Service  as  backup |
| withholding and 31% of all reportable payments made to me thereafter will be |
| withheld  and  remitted to the Internal  Revenue  Service  until I provide a |
| taxpayer identification number.                                              |
|                                                                              |
| Signature_______________________________          Date______________________ |
|                                                                              |
| -----------------------------------------------------------------------------|
                                       13                                      |