Early education in physics at University of Chicago in the 1930s; high-energy particle counter; discovery of positron; discovery of neutrons; neutron experiments; reminiscences of University of California, Berkeley; foundation support of research; 60-inch cyclotron; building cloud chambers; neutron spectroscopy; neutron time-of-flight; magnetic moment of the neutron; transuranium elements; announcement of fission; the Tizard Mission; war research work; building of a betatron; effect of war techniques on postwar research; cyclotron work, 1947; impressions of nuclear physics in 1966. Also prominently mentioned are: Philip Abelson, Carl David Anderson, Hans Albrecht Bethe, Felix Bloch, William Morrison Brobeck, Vannevar Bush, Winston Churchill, Jacob Clay, Arthur Holly Compton, John R. Dunning, Enrico Fermi, Otto Robert Frisch, William W. Havens, William Alfred Higinbotham, J. Barton Hoag, Thomas Johnson, Charles Christian Lauritsen, Ernest O. Lawrence, Frederick Alexander Lindemann (Viscount Cherwell), Milton Stanley Livingston, Alfred Loomis, Edwin Mattison McMillan, Robert Andrews Millikan, Robert Sanderson Mulliken, J. Robert Oppenheimer, Kenneth Pitzer, Harold Plumley, James Rainwater, Emilio Gino Segr,̈ Robert Serber, Arthur Snell; Columbia University, Lawrence Radiation Laboratory, Los Alamos National Laboratory, Michael Reese Hospital, and Stanford University.