In Wilson's first letter, dated 28 September 1939, he praises Thomson's book, the Factorial Analysis of Human Ability, though he confesses that he thinks the use of factor analysis in psychology limited. He discusses the response of President Woodrow, Britain, and France towards Germany, and describes Germany as an aggressive nation psychologically.

In Thomson's reply, dated 21st November 1939, he thanks Wilson for his letter, and agrees with his assessment of international relations. He apologises for the delay in his response, referring to efforts to prepare Moray House for war, and the general mood as a result of the war. He thanks Wilson for copies of his Psychometrika articles, though highlights differences in his own calculations to Wilson's, and refers to the work of Derrick Lawley.

In the final letter from Wilson, dated 7 December 1939, he acknowledges the differences in calculations, but can find no reason for this, and discusses his work at length.