| Description | Manuscript. Letter dated 1915 regarding Egon Pearson's rejection of the post offered to him. Letters dated 1918-1919 about thanking Pearson for his war work in connection with anti-aircraft gunning, about re-employment of his staff, about obtaining a calculating machine, about the invaluable mathematical work of Lieutenant Cain with the Air Group, about seeking Pearson's advice on the "bomb distribution problem". |