Document:

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To:      Computershare Trust Company of Canada
         100 University Avenue, 9th Floor
         Toronto, ON M5J 2Y1

                        COMPLETE EITHER PART A OR PART B

You must be a registered shareholder to make an election on this form.

PART A    DIVIDEND REINVESTMENT ELECTION.

This election to participate is made in accordance with the provisions of the
Amended and Restated Dividend Reinvestment Plan of The Thomson Corporation (the
"Plan").

The undersigned holder of common shares of The Thomson Corporation elects to
enroll in the Plan and acknowledges having received a copy of the Plan (and if
the shareholder is a resident of the United States, a copy of the prospectus
registering the common shares issuable thereunder) and agrees that participation
will be subject to the terms and conditions of the Plan.

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Name of Registered Shareholder (please print)      Signature

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Date

PART B    CURRENCY ELECTION.

If you do not elect to participate in the Plan, you will receive your dividends
in cash payable in United States currency unless you indicate otherwise in
sections 1 or 2 below. If you have previously elected to receive dividends in
either Canadian or United Kingdom currency and now wish to receive dividends in
United States currency, please complete section 3 below.

In order for your currency election provided in sections 1, 2 or 3 below to be
effective in relation to a particular dividend, Computershare Trust Company of
Canada ("Computershare") must receive a completed form before the record date
for that dividend. If you complete sections 1, 2 or 3 below, your election will
remain effective until you notify Computershare otherwise.

1.        Notice of Election to Receive Dividends in Canadian Currency

The undersigned registered holder of common shares of The Thomson Corporation
elects to receive in Canadian currency any cash dividends paid on such shares.
It is understood that the Canadian currency equivalent of such dividends will be
calculated on the basis of the Bank of Canada noon rate of exchange quoted on
the record date for each dividend.

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Name of Registered Shareholder (please print)      Signature

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Date

2.        Notice of Election to Receive Dividends in United Kingdom Currency

The undersigned registered holder of common shares of The Thomson Corporation
elects to receive in United Kingdom currency any dividends paid on such shares.
It is understood that the United Kingdom currency equivalent of such dividends
will be calculated on the basis of the noon buying rate in New York for cable
transfers in United Kingdom currency as certified for customs purposes by the
Federal Reserve Bank of New York quoted on the record date for each dividend.

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Name of Registered Shareholder (please print)      Signature

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Date

3.        Notice of Election to Receive Dividends in United States Currency
         (for shareholders who have previously elected to receive dividends in
          Canadian or United Kingdom currency only)

The undersigned registered holder of common shares of The Thomson Corporation
elects to receive in United States currency any cash dividends paid on such
shares.

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Name of Registered Shareholder (please print)      Signature

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Date

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    THE THOMSON CORPORATION - AMENDED AND RESTATED DIVIDEND REINVESTMENT PLAN

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                              QUESTIONS AND ANSWERS

         THE FOLLOWING QUESTIONS AND ANSWERS DEAL WITH CERTAIN FEATURES OF THE
PLAN AND ARE DESIGNED ONLY TO BE HELPFUL. THEY DO NOT COVER ALL OF THE
PROVISIONS OF THE PLAN. FOR FULL PARTICULARS PLEASE SEE "DESCRIPTION OF THE
AMENDED AND RESTATED DIVIDEND REINVESTMENT PLAN OF THE CORPORATION" AS SET FORTH
HEREIN.

1.       WHAT IS THE DIVIDEND REINVESTMENT PLAN?

                  We refer to The Thomson Corporation Dividend Reinvestment Plan
         as the plan. The plan provides a means for registered holders of our
         common shares who are resident in Canada, the United States and the
         United Kingdom to purchase additional shares by the reinvestment of
         their dividends.

2.       WHAT ARE THE ADVANTAGES OF THE PLAN?

                  A participant may purchase shares quarterly by reinvesting ALL
         the cash dividends paid on the shares held of record by the participant
         pursuant to the plan. THE PRICE OF SHARES PURCHASED WILL BE THE
         WEIGHTED AVERAGE MARKET PRICE, as described under "Purchase Price".

                  Investment of all of a participant's funds in the plan is
         possible because the plan permits fractions of shares, as well as whole
         shares, to be purchased and held by Computershare Trust Company of
         Canada, who we refer to as Computershare, for participants pursuant to
         the plan. DIVIDENDS PAID ON SHARES ENROLLED IN THE PLAN, INCLUDING
         FRACTIONS, WILL BE AUTOMATICALLY REINVESTED.

                  THERE ARE NO BROKERAGE COMMISSIONS OR SERVICE CHARGES PAYABLE
         BY PARTICIPANTS IN CONNECTION WITH THE PURCHASE OF SHARES PURSUANT TO
         THE PLAN. All administrative costs of the plan, including fees and
         expenses of Computershare, are paid by us.

3.       WHO IS ELIGIBLE TO PARTICIPATE?

                  Any registered holder of our common shares is eligible to
         enroll in the plan at any time. A beneficial owner of shares (for
         example, a person whose shares are held and registered in a nominee
         account) must become a registered shareholder by having their shares
         transferred into their own name or into a specific segregated
         registered account (for example, a numbered account with a bank, trust
         company or broker), in order to participate in the plan.

4.       HOW DOES AN ELIGIBLE SHAREHOLDER BECOME A PARTICIPANT IN THE PLAN?

                  An eligible shareholder may enroll in the plan by completing
         and signing a participation form and returning it to Computershare at
         the address set forth below. The completed participation form must be
         received by Computershare at least five business days before the record
         date in order for that dividend to be dealt with under the plan in
         accordance with such participation form. Do not send share certificates
         or dividend cheques. ONCE YOU HAVE ENROLLED, YOUR PARTICIPATION IN THE
         PLAN CONTINUES UNTIL TERMINATED BY YOU OR UNTIL THE PLAN IS TERMINATED
         BY US. NO FURTHER ACTION IS REQUIRED UNLESS YOU WISH TO CHANGE THE
         TERMS OF YOUR CURRENT PARTICIPATION IN THE PLAN.

5.       HOW WILL THOMSON'S SHARES BE PURCHASED FOR PARTICIPANTS?

                  On each dividend payment date, we will, after deducting any
         applicable withholding taxes, promptly pay over to Computershare all
         cash dividends paid on shares held of record by participants and
         enrolled in the plan and all cash dividends on shares held of record by
         Computershare for participants' accounts pursuant to the plan, and
         Computershare will purchase shares for the participants with such funds
         directly from us.

6.       WHAT WILL BE THE PRICE OF SHARES PURCHASED UNDER THE PLAN?

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                  The price of the shares purchased under the Plan will be the
         weighted average trading price for the common shares on the Toronto
         Stock Exchange for the five trading days preceding the record date for
         the dividend. Dividends, which are payable in United States currency,
         will be converted into Canadian dollars at the Bank of Canada noon rate
         for Canadian dollars on the record date for the dividend (or the next
         business day if this day is not a business day).

7.       WILL CERTIFICATES BE ISSUED FOR SHARES PURCHASED?

                  All shares purchased pursuant to the plan are enrolled in the
         plan and are registered in the name of Computershare, or its nominee,
         as agent for the participants in the plan. Certificates for such shares
         will not be issued to participants unless specifically requested. This
         convenience protects against loss, theft or destruction of share
         certificates. The number of shares purchased pursuant to the plan will
         be credited to plan accounts established for participants and will be
         shown on their statements of account.

                  A participant may request a certificate for any number of
         whole shares held by Computershare for their account by writing to
         Computershare. However, certificates for less than five shares will not
         be issued except upon withdrawal from the plan or termination of the
         plan. Certificates will never be issued for fractional shares.
         Certificates will be sent to you after Computershare receives your
         written request.

8.       WHEN MAY A PARTICIPANT TERMINATE PARTICIPATION IN THE PLAN?

                  A participant may terminate participation in the plan at any
         time by giving written notice to Computershare. A participant who
         wishes to suspend dividend reinvestment with respect to all shares
         enrolled in the plan may do so if written notice is received by
         Computershare no later than five business days preceding the dividend
         record date.

9.       WHAT HAPPENS WHEN PARTICIPATION IN THE PLAN IS TERMINATED?

                  When terminating participation in the plan, a participant will
         receive a certificate for the whole shares held in the participant's
         account and a cash payment in settlement of any fraction of a share.
         The cash payment will be calculated pursuant to the closing price of
         the common shares on the Toronto Stock Exchange on the business day
         immediately preceding the effective date of termination.

10.      MAY THE PLAN BE CHANGED OR TERMINATED?

                  The plan may be amended, suspended or terminated by us at any
         time.

11.      WHAT KIND OF STATEMENTS WILL BE SENT TO PARTICIPANTS IN THE PLAN?

                  A statement will be mailed to each participant as soon as
         practicable following each dividend payment date. The statements are a
         participant's continuing record of purchases and should be retained for
         income tax purposes.

15.      WHAT ARE THE INCOME TAX CONSEQUENCES OF PARTICIPATION IN THE PLAN?

                  The fact that dividends are invested pursuant to the plan does
         not relieve participants of any liability for taxes that may be payable
         on such dividends. A summary explanation of the tax implications of
         participation in the plan can be found on page 9 - 10 of our
         Registration Statement on Form F-3 filed [July  , 2002].

ANY COMMUNICATION OR QUESTIONS REGARDING THE PLAN SHOULD BE ADDRESSED TO
COMPUTERSHARE AT:

                      Computershare Trust Company of Canada
                      100 University Avenue, 9th Floor
                      Toronto, Ontario, Canada M5J 2Y1

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            Tel.: 1 (800) 564-6253 (in Canada and the United States)
                  (514) 982-7270 (from any country)

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   DESCRIPTION OF THE AMENDED AND RESTATED DIVIDEND REINVESTMENT PLAN OF THE
                              THOMSON CORPORATION

PURPOSE OF THE PLAN

         The purpose of our amended and restated dividend reinvestment plan is
to provide registered holders of our common shares resident in Canada, the
United States and the United Kingdom with a simple and convenient method of
investing cash dividends declared on our common shares in additional common
shares of Thomson, without paying any brokerage commissions or service charges.

PARTICIPATION IN THE PLAN

         You are eligible to participate in the plan if you are a registered
holder of common shares resident in Canada, the United States or the United
Kingdom and meet the requirements outlined below. To become a participant, you
must complete a participation form and forward it to Computershare Trust Company
of Canada ("Computershare"), at the address set forth below. Only residents of
Canada, the United States or the United Kingdom are currently allowed to
participate in the plan. Shareholders resident in other jurisdictions shall be
allowed to participate in the plan only after Thomson determines that
participation should be made available to those shareholders taking into account
the necessary steps to comply with the laws relating to the offering and the
sale of common shares in the jurisdiction of those shareholders.

         If you are a beneficial owner whose common shares are registered in a
name other than your own, you may participate in the plan by having those common
shares transferred into your name or into a specific segregated registered
account. A beneficial owner whose shares are held in a specific segregated
registered account, such as a numbered account with a bank, trust company or
broker, may request that entity, subject to any restriction imposed by the
entity, to enroll the account in the plan with respect to those shares.

         If the common shares are registered in more than one name, all
registered holders must sign the participation form. Also, if your total holding
is registered in different names (e.g., full name on some share certificates and
initials and surname on other share certificates), a separate participation form
must be completed for each different registration name. If dividends from all
shareholdings are to be reinvested under one account, registration must be
identical. If your common shares are registered in the name of an investment
dealer, a financial institution or a recognized nominee, you must either
transfer those common shares into your own name prior to becoming a participant
or instruct the nominee to participate in the plan on your behalf.

         You may obtain a participation form at any time by providing a written
request to Computershare. Once you have enrolled in the plan, you will remain
enrolled until you discontinue participation or until we terminate the plan (see
"Amendment, Suspension or Termination").

         Any common shares acquired outside of the plan which are not registered
in exactly the same name or manner as common shares enrolled in the plan will
not be automatically enrolled in the plan. If you purchase additional common
shares outside the plan, you are advised to contact Computershare to ensure that
all common shares you own are enrolled in the plan.

         Your participation in the plan will commence with the next dividend
payment date after Computershare receives your participation form, provided
Computershare receives it at least five business days before the record date of
the dividend. If a participation form is received by Computershare less than
five business days before the record date, that dividend will be paid to you in
the usual manner and your participation in the plan will commence with the next
dividend. Dividend record dates for the common shares have historically been
between the 20th and 25th of February, May, August and November in each year.

         You may not transfer the right to participate in the plan to another
person.

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         Death will not affect your election to participate. Upon death, your
participation will remain effective until terminated by the personal
representative of your estate or by us.

METHOD OF PURCHASE

         Under the terms of the plan, if you are a registered holder of common
shares, through the participation form you may direct Computershare to reinvest
all cash dividends on all common shares registered in your name to purchase
newly issued common shares. You will not be entitled to direct payment of less
than 100% of all cash dividends on the common shares you own. Cash dividends
payable on common shares registered for a participant in the plan, after
deduction of any applicable withholding tax, will be paid to Computershare and
applied automatically by Computershare on each dividend payment date to the
purchase of common shares for that participant. Your account will be credited
with the number of common shares, including fractions, equal to the cash
dividends reinvested for you divided by the applicable purchase price for the
common shares.

PURCHASE PRICE

         The purchase price of common shares to be purchased on your behalf with
reinvested cash dividends on your common shares will be the weighted average
trading price for the common shares on the Toronto Stock Exchange for the five
trading days preceding the record date for the dividend. Participants will not
be charged any brokerage commissions or service charges and all administration
costs of the plan will be paid by us. Any cash dividends payable in currencies
other than Canadian currency will be converted into Canadian dollars at the Bank
of Canada noon rate for Canadian dollars on the record date for the dividend (or
the next business day if this day is not a business day).

FRACTIONAL COMMON SHARES

         Computershare will credit your account with fractions of common shares
and dividends in respect of such fractions to allow full investment of eligible
funds. The rounding of any fractional interest shall be determined by
Computershare using such methods as it deems appropriate in the circumstances.

ADMINISTRATION

-        Computershare, as agent for plan participants, will administer the
         plan. Its responsibilities include:

-        receiving eligible funds;

-        purchasing and holding the common shares accumulated under the plan;

-        reporting regularly to the participants; and

-        other duties required by the plan.

         Common shares purchased under the plan will be registered in the name
of each participant and will be held by Computershare in the accounts of
participants. We will pay all costs of administering the plan, including the
fees and expenses of Computershare. Computershare will be paid fees for its
services as may, from time to time, be agreed upon by Computershare and us.

REPORTS TO PARTICIPANTS

         Computershare will maintain a separate account for each participant in
the plan. You will receive from Computershare a detailed statement of your
account following each dividend payment. This statement will set out the record
date, the dividend payment date, the amount of cash dividend paid on your common
shares, the amount of any applicable withholding tax, the number of common
shares purchased through the plan with respect to such dividend, the purchase
price per common share and the updated total number of common shares being held
by Computershare for your account.

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WITHDRAWAL FROM THE PLAN

         You may terminate your participation in the plan at any time by writing
to Computershare. Computershare must receive your notice of termination at least
five business days before the record date for the next dividend payment. If
Computershare receives your termination request after this date, the withdrawal
will be effective the day following the dividend payment date. When you withdraw
from the plan, certificates for whole common shares credited to your account
under the plan will be issued, and a cash payment will be made to you for any
fraction of a common share based upon the closing price of the common shares on
the Toronto Stock Exchange on the day immediately preceding the effective date
of termination. Thereafter, cash dividends on any of our common shares that you
continue to hold will be paid to you and will not be reinvested. Death will not
affect your election to participate in the plan which will remain effective
until terminated by your personal representative.

CERTIFICATES FOR COMMON SHARES

         All common shares purchased pursuant to the plan will be credited to
your individual account held by Computershare. This protects you against the
loss, theft or destruction of share certificates. If you request, in accordance
with this paragraph, or if you withdraw from the plan or if the plan terminates,
Computershare will issue and deliver certificates for all whole common shares
credited to your account. The number of common shares held for you under the
plan (less any common shares for which certificates have been delivered to you)
will be shown on your statement of account. You may request delivery of share
certificates by writing to Computershare; however certificates for less than
five common shares will not be issued except upon termination from the plan. In
no event will certificates be issued for fractional shares. Certificates will be
sent to you after Computershare receives your written request.

         Accounts under the plan are maintained in the names in which the common
shares of the participants were registered at the time they enrolled in the
plan. Consequently, certificates for shares will be similarly registered when
issued.

SHAREHOLDER VOTING

         For any meeting of shareholders, you will receive proxy materials in
order to vote all common shares held for your account. Your common shares will
be voted as you direct or you may vote by proxy or in person at the meeting of
shareholders. A fractional share does not carry the right to vote.

RIGHTS OFFERINGS

         If we have a rights offering pursuant to which holders of our common
shares may subscribe for additional common shares or other securities, rights
attributable to fractional interests held for participants under the plan will
be sold by Computershare and the net proceeds will be used to acquire additional
common shares and participants' respective entitlements thereto will be credited
to their accounts.

STOCK SPLITS AND STOCK DIVIDENDS

         Common shares distributed pursuant to a stock dividend or a stock split
on shares held by Computershare for a participant under the plan will be
retained by Computershare and credited by Computershare proportionately to the
accounts of the participants in the plan. Certificates for any common shares
resulting from a stock dividend or a stock split on shares held of record by a
participant will be mailed directly to the participant in the same manner as to
shareholders who are not participating in the plan.

LIABILITY OF THE COMPANY AND COMPUTERSHARE

         We and Computershare, in administering the plan, are not liable for any
act or omission to act including without limitation, any claims of liability:
(a) with respect to receipt or non-receipt of any payment, form or other writing
purported to have been sent to us or Computershare; (b) actions taken as a
result of inaccurate and incomplete information or instructions; (c) arising out
of failure to terminate your account upon your death prior to

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receipt by Computershare of notice in writing of such death; (d) with respect to
the prices at which common shares are purchased for your account and the times
such purchases are made; or (e) relating to your tax liability.

AMENDMENT, SUSPENSION OR TERMINATION OF THE PLAN

         We reserve the right to amend, modify, suspend or terminate the plan at
any time, but such actions shall have no retroactive effect that would prejudice
your interests. Computershare will notify you in writing of any material
modifications made to the plan. If we terminate the plan, Computershare will
remit to you as soon as possible, certificates for whole common shares held in
your accounts under the plan and cash payments for any fraction of a common
share based upon the closing price of the common shares on the Toronto Stock
Exchange on the day immediately preceding the effective date of termination of
the plan. If we suspend the plan, Computershare will make no investment on the
dividend payment date immediately following the effective date for such
suspension. Any common share dividends subject to the plan and paid after the
effective date of such suspension will be remitted by Computershare to the
participants to whom these are due.

NOTICES

         All notices from Computershare to you will be addressed to your last
known address. All notices, requests, elections or instructions under the plan
required or permitted to be given to Computershare should be in writing and
signed by you and should be sent to the following address:

         Computershare Trust Company of Canada
         100 University Avenue,
         9th Floor
         Toronto, Ontario
         M5J 2Y1
         Canada

GENERAL

         We reserve the right to interpret and regulate the plan as we deem
necessary or desirable and any such interpretation or regulation will be final.

         Unless the context requires otherwise, words importing the singular
number only shall include the plural and vice versa, words importing the
masculine gender shall include feminine and neuter genders and vice versa, and
words importing persons shall include individuals, partnerships, associations,
trusts, unincorporated organizations and corporations.

GOVERNING LAW

         The plan shall be governed and construed in accordance with the laws in
force of the Province of Ontario, Canada.

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