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Thomson tells Ledermann how glad he is that he will be attending the meeting, since he wants to discuss some difficulties he is having with Burt's work, particularly his reciprocity of tests and persons. He outlines these difficulties with several pages of explanatory working.

Written on the back of several copies of the preliminary notice for the twelfth International Congress of Psychology.

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Thomson thanks Ledermann for his letter, most likely wishing him a happy seventieth birthday; refers to a song he used to sing to an elderly Strasburg professor; and reflects on an evening he spent with Ledermann ten years previously.

Thomson also passes on his best wishes for Ledermann's trip to Israel, and suggests times when they can meet in Manchester the following May.

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Thomson assures Ledermann that he understands his hesitation at accepting the post at Moray House. He also refers to calculations of Ledermann's, stating that they agree with his own, but since there are errors in Thomson's earlier calculations, will need to be checked again. He comments briefly on his disappointment at the delay in publication of the new edition of The Factorial Analysis of Human Ability.

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Thomson mentions a paper of Mr Hardie's and indicates that he would like to discuss this with Ledermann.

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The table to which Thomson refers possibly comes from Burt's The Factors of the Mind. Thomson discusses the table at length, illustrating with calculations and matrices throughout.

Written on the back of several copies of the preliminary notice for the twelfth International Congress of Psychology.

Scope and Contents Thomson also wishes Ledermann and his family a Happy New Year, and asks Ledermann about the university examinations process in Germany, telling him of his own experience. Thomson discusses dice throwing, referring to his own article, a Hierarchy without a General Factor, from the British Journal of Psychology, and his own experiments with dice. The letter is written on the back of several tables and graphs regarding...

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Thomson also apologises for being unable to attend the ceremony, and refers to Ledermann having to split his home up.

Scope and Contents From the Fonds:

The collection largely consists of letters from Godfrey Thomson to Ledermann. Many are highly mathematical in content, containing formulae and mathematical notation, though they also regard social events and contain enquiries from Thomson with regards to the safety of Ledermann's family throughout the war.

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Thomson also reflects on the war, and sends his regards to Ledermann's parents.

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Thomson confirms arrangements for he and Ledermann's meeting, and asks him to bring Bartlett's offprints with him.