Early life on Ohio farm; College of Wooster; Arthur Holly Compton, his family, his academic and extracurricular interests. Princeton years, 1913-1916; associations and fellowships; marriage, 1916; experimentation at Westinghouse Lamp Co., 1917-1919; work on "large electron" leading to National Research Fellowship at Cavendish Laboratory, 1919-1920; association with Ernest Rutherford and J. J. Thompson, living arrangements, weekly colloquia; recollections of Albert Einstein. Chairman of Department of Physics at Washington University, 1920-1923; bringing in new faculty; freedom of research. Guggenheim Fellowship at Punjab University, 1926-1927; organizing Kashmir expedition, observational work and other expedition details. Reaction to A. H. Compton's Nobel Prize award, 1927; trip to Sweden and Nobel address. Recollections of Solvay and Volta Conferences; association with James Franck, Niels Bohr, and Marie Curie; development of A. H. Compton's cosmic ray interest, world cosmic ray expeditions, 1931-1934; anecdotes and places visited; Compton-Robert A. Millikan controversy; comments on Century of Progress Exposition, 1933; memories of stay at University of Oxford on A. H. Compton's Eastman professorship, 1934-1935; associates at Oxford; recollection of European colleagues Aston, Enrico Fermi, Werner Heisenberg, and Karl Sommerfeld. About A. H. Compton: chairman of Physics Department at University of Chicago, 1940-1945; earlier contacts with Chicago; relation to Michelson; widening of philosophical interests; long-term consultant to General Electric Co., 1926-1945; consultant to National Cancer Advisory Council and Chicago Tumor Institute. Disappointment in Compton family life; close working relationship between A. H. Compton and Betty; relation of physicists' wives to their husbands' work; Betty's assessment of her career.