The Florence R. Sabin Collection spans her entire medical career. It primarily consists of correspondence (1903-1941) between Sabin and Mabel (Glover) Mall, the wife of Franklin P. Mall, M.D., the first professor of anatomy at Johns Hopkins. Mabel S. Glover was one of three women in the first entering class at the Johns Hopkins School of Medicine. Before the end of her first year of medical school, she dropped out to marry Franklin Mall. Sabin attributed much of her early success in medicine to the mentoring provided by Franklin Mall. This correspondence reveals the close friendship Sabin enjoyed with the Mall family and provides a glimpse of the early years at Johns Hopkins Hospital and the work of the Anatomical Laboratory. Some of the later correspondence discusses the biography of Franklin P. Mall that Sabin was preparing. The collection also includes several letters to Mrs. Mall from Simon Flexner (1919-1940) and a few other correspondents.