Thomson thanks Ledermann for his letters, and discusses his study of the problem of estimation, referring to the work of Bartlett. He also informs Ledermann that he has ordered Darmois' book, Methodes d’ Estimation, and asks him if he thinks it worthwhile buying a copy of Cullis’ Matrices and Determinoids.

Thomson advises Ledermann to keep account of postage and expenditure so he can be reimbursed for these, and informs him of his whereabouts for the next few months in order to arrange a meeting time.