The Walter R. Steiner Collection spans his entire medical career. It includes correspondence, lecture notes, photographs, and reprints. Correspondence includes one folder of letters from Harvey Cushing and one folder of letters from William Osler. Other correspondents include Steiner's father, B.C. Steiner, the first librarian of the Enoch Pratt Free Library, and Daniel Coit Gilman, first president of the Johns Hopkins University. In addition, the collection includes six volumes of lecture notes taken by Steiner during William H. Welch's classes in bacteriology and pathology (1895-1896). Manuscripts include remarks by Steiner on small pox vaccination before the Connecticut State Legislature (1911 and 1913).