Press Release Details

The Thomson Corporation to Webcast 2005 Investor Day -- October 6, 2005

October 3, 2005 at 9:05 AM EDT

STAMFORD, Conn., Oct. 3 /PRNewswire-FirstCall/ -- The Thomson Corporation (NYSE: TOC; TSX: TOC) today announced that it will webcast the Corporation's 2005 Investor Day executive presentations and Q&A on October 6, 2005.

    (Logo:  http://www.newscom.com/cgi-bin/prnh/20020227/NYW014LOGO )

     Who:      President and CEO, Richard J. Harrington, and other Thomson
               executives will discuss the Corporation's growth strategy,
               business highlights and overall market conditions.

     What:     Thomson Investor Day

     When:     Thursday, October 6, 2005 @ 9:00 a.m. (ET)

     Where:    www.thomson.com

     How:      Live over the Internet - To participate in the webcast, visit
               www.thomson.com and click on "Investor Relations" at the top of
               the page and then "Executive Presentations" at the left side of
               the page.

     Contacts: Frank Golden, Vice President, Investor Relations
               203-539-8470, frank.golden@thomson.com

               Jason Stewart, Vice President, Media Relations
               203-539-8339, jason.stewart@thomson.com

    The webcast will be archived at www.thomson.com.

    The Thomson Corporation

The Thomson Corporation (www.thomson.com), with 2004 revenues of $8.10 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software tools and applications to more than 20 million users in the fields of law, tax, accounting, financial services, higher education, reference information, corporate e-learning and assessment, scientific research and healthcare. With operational headquarters in Stamford, Conn., Thomson has approximately 40,000 employees and provides services in approximately 130 countries. The Corporation's common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

(Minimum Requirements to listen to broadcast:

The Windows Media Player software, downloadable free from http://www.microsoft.com/windows/windowsmedia/EN/default.asp and at least a 28.8Kbps connection to the Internet. If you experience problems listening to the broadcast, send an email to webcastsupport@tfprn.com.)

SOURCE  The Thomson Corporation
    -0-                             10/03/2005
    /CONTACT:  Frank Golden, Vice President, Investor Relations,
+1-203-539-8470, frank.golden@thomson.com; or Jason Stewart, Vice President,
Media Relations, +1-203-539-8339, jason.stewart@thomson.com /
    /Photo:  http://www.newscom.com/cgi-bin/prnh/20020227/NYW014LOGO /
    /Web site:  http://www.thomson.com /
    (TOC TOC.)

CO:  The Thomson Corporation
ST:  New York
IN:  FIN CPR
SU:  CCA

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5577 10/03/2005 09:03 EDT http://www.prnewswire.com