The fonds contains papers relating to Dr. Rosenblatt's time in the army, including assignments, certificates of appointment, billets for lodging, railway tickets, an attestation of medical ability, and other documents. Also included are the boards (front and back covers) from Dr. Rosenblatt's daybook, which have, on the inside cover, a list of ailments and the drugs used to treat them.

From the Headquarters of the Director, Medical Section, First Army.

Outside front cover reads “Tagebuch fur Aertze Chemische Fabrik Gedeon Richter Bucuresti”. Inside front and back cover and on the seven leaves contain a list of medical ailments and the drugs used to treat them.

The fonds contains original and typescript letters, manuscript notes, newspaper clippings, journal extracts, reminiscences and more, assembled by Harvey Cushing chiefly between 1920 and 1924 during the course of his research for the biography of William Osler. For the biography, Cushing collected and retyped over 7500 pieces of Osler's correspondence, among which are some original letters.

The fonds is separated into three series: Manuscripts, Working Notes and Osler's Correspondence. It also contains photographs, annual reports, publications, clippings, one watercolor painting, one postcard. Osler's correspondence is further arranged in three subseries based chronologically.