Correspondence, letterbooks, diary, articles, notebooks, biographical material, genealogical material, newspaper clippings, scrapbooks, photographs, sketches, studies, and other papers relating primarily to Jelliffe's career as a neurologist, psychoanalyst, and educator. Subjects include psychiatry, psychopathology, psychosomatic medicine, and psychotherapy; serials owned and edited by Jelliffe including the Journal of Nervous and Mental Disease, Nervous and Mental Disease Monograph Series, and Psychoanalytic Review; and the Jelliffe family. Other subjects include Huntington's chorea, dementia praecox (schizophrenia) and other mental illnesses, and trips to Alaska and Europe. Includes correspondence and a diary of his first wife, Helena "Lelie" Dewey Leeming Jelliffe. Family correspondents also include Jelliffe's daughters, Winifred Jelliffe Emerson, Helena Woodruff Jelliffe Goldschmidt, and Sylvia Canfield Jelliffe Stragnell; his sister Louise "Lulu" Jelliffe Long; brothers-in-law, Joseph Leeming and Thomas Lonsdale Leeming; and second wife, Belinda Jelliffe. Other correspondents include Eugen Bleuler, A.A. Brill, M. Eitingon, Havelock Ellis, Paul Federn, Otto Fenichel, Sándor Ferenczi, Sigmund Freud, G. Stanley Hall, Ernest Jones, C.G. Jung, Emil Kraepelin, René Laforgue, Nolan D.C. Lewis, Karl A. Menninger, Adolf Meyer, Sandor Rado, Otto Rank, Wilhelm Reich, Theodor Reik, Paul Schilder, Wilhelm Stekel, and William A. White.