Scope and Contents In Ledermann's letter to Thomson, dated 25 Apr 1939, he informs Thomson of his applying for the Carnegie Teaching Fellowship, which would allow him to undertake original research in the areas of pure matrix algebra and abstract group theory. He also mentions that he would like to devote some time to applied mathematics, specifically factor analysis, and asks Thomson for permission to continue the work he undertook as Thomson's assistant, perhaps with the help of...

Scope and Contents In Thomson's letter to Ledermann, dated 19 Jun 1939, he apologises for not replying to an earlier letter of Ledermann's and informs him that he will be happy to send him any of the letters he has written regarding his work from the last year, asking him to specify the subjects he is interested in. In his reply, dated 24 Jun 1939, Ledermann tells Thomson that he would like to look at the problem of maximising and minimizing the specifics, and that he has...

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Notes in Ledermann's hand titled Professor Thomson's letters of Jun 14th and 15th on Distribution of Loadings, which explores the distribution of loadings found in Thurstone’s example in Primary Mental Abilities, illustrated with text and diagrams.

Ledermann also refers to an article by Woodrow from the Journal of Educational Psychology.

Scope and Contents Ledermann informs Thomson that Professor Turnbull of St Andrews has advised him against taking any action regarding his DSc degree at St Andrews. Ledermann asks Thomson if he can do anything to help matters in Edinburgh, such as pointing out that Ledermann had begun working for Thomson before his period of research officially started. He also mentions that he has received proofs of his article from Biometrika, and informs Thomson that his parents and...

Scope and Contents Material regarding the Moray House Tests, c1920s-1970s; Northumberland Mental Tests, c1920s; Sample tests, 1920-1987; Testing Samples, United States, c1920s-1950s; Publications, 1896-c1978; Godfrey Thomson, c1930s-1947; Correspondence...

Scope and Contents Includes a reprint of Thomson's letter titled Methods of Estimating Mental Factors from Nature, vol. 141, (Feb 1938), 246; a handwritten copy of Thomson's manuscript in Ledermann's hand titled Copy of Professor Thomson's M S on regression and Bartlett's estimates; and a typed copy of a letter from Bartlett to Thomson in which argues that neither he nor Thomson are right and the other wrong, but rather that both...

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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Ledermann tells Thomson about the job offer he has received from St Andrews, that of assistant lecturer. He expresses his regret that he will not have much time for research, particularly for work with Thomson, and hopes Thomson won't think him ungrateful. He asks Thomson for advice regarding the submission of his DSc, and lets him know that the condition attached to his permit allowing him to stay in the UK has been lifted by the Home Office.

Scope and Contents Ledermann expresses his disappointment at the decision by the faculty to refuse his DSc on the basis that he is leaving Edinburgh one term before his period of research has expired. He asks for Thomson's advice on the matter. He also informs Thomson that his paper on sampling distribution is likely to be printed in Biometrika; and that an article he wrote titled The Orthogonal Transformation of a Factorial...

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This is an draft of a letter Ledermann sent to Lady Thomson in order to assist her in writing a biography of Thomson. Ledermann discusses how his professional relationship with Thomson commenced, the letters Thomson sent to him, and Thomson's methodology for solving mathematical problems.

The letter is written on the reverse of scrap paper with formulae and calculations.