Recollections of Solvay and Volta Conferences, associations with Franck, Bohr and Mme. Curie; development of AHC’s cosmic ray interest, world cosmic ray expeditions 1931-34, anecdotes and memories of places visited; Compton-Millikan controversy; comments on Century of Progress Exposition 1933; memories of stay at Oxford on AHC’s Eastman Professorship 1934-35, associates at Oxford; recollection of European colleagues Aston, Fermi, Heisenberg and Sommerfeld. About AHC: Chairman of Physics Dept. at Chicago 1940-45, earlier contacts with Chicago, relation to Michelson, widening of philosophical interests, long-term consultant to General Electric Co. (1926-45), consultant to National Cancer Advisory Council and Chicago Tumor Institute. Disappointment in Compton family life, close working relationship between AHC and Betty, relation of physicists’ wives to their husbands’ work; Betty’s assessment of her career.