Personal records of James E. Till, consisting primarily of correspondence, honours and awards, teaching materials, research and administrative files, manuscripts and addresses (including slides), interviews, and photographs, documenting Dr. Till's career as a professor of medical biophysics at the University of Toronto and as a cancer specialist. Includes files on the Centre (later Joint Centre) for Bioethics and the Department of Medical Biophysics at the University of Toronto, the Canadian Cancer Society and the Ontario Cancer Institute /Princess Margaret Hospital.