The fonds documents mainly Babkin's professional interests in physiology, especially glandular secretions and the nervous system. The fonds contains correspondence; lecture notes; citations; research notes and papers, including manuscripts sent to him by his colleagues; reprints of scientific articles mainly in Russian; and material used in the preparation of the biography of Ivan Pavlov. The latter contains correspondence with Ivan Petrovich Pavlov and members of his family, 1923-1948; photographs and portraits; and an unabridged typescript copy of Parts 1-3 of Pavlov: a Biography, with manuscript corrections, 1943-1946.

Papers consist of personal correspondence, including substantial family correspondence, diaries, journals, engagement books, ledgers, menus, manuscript poems, galley proofs, lecture notes, scrapbooks, and photographs. It includes correspondence, 1874-1935; a diary of Drummond's trip to Great Britain, 1902; dinner menus, 1902-1903; engagement books, 1902-1906; galley proofs, 1905-1911; Journal of Impressions kept at Savanna la Mar, Jamaica, Windsor and Montreal, 1903-1911; lecture notes taken at McGill, 1878-1882; ledgers containing financial entries and patients' accounts during Drummond's practice in Knowlton and Montreal, 1885-1889; notebooks containing manuscripts poems, drafts and clippings, 1894-1909; scrapbooks related to literary topics, including clippings about Drummond's public readings, and book reviews, 1854-1907 and scrapbooks related to Drummond's dogs, 1890-1907. There are also some papers of Mrs. W.H. Drummond, including a typescript of her Life of W.H. Drummond; and diaries recording her trips to United States and Canada, 1892, 1903.

Fonds documents Burton Chance's links with Casey A. Wood from 1922 until Wood's death in 1942. The fonds contains correspondence between the two men, reprints of C.A. Wood and letters from various correspondents concerning C.A. Wood.

Fonds contains Dr. M.H.F. Friedman's personal papers and files relating to Dr. Boris P. Babkin and also correspondence with the editor of Babkin's biography of I.P. Pavlov.

The fonds consists of Dr. Bensley's research notes and correspondence, particularly in relation to his publication McGill Medical Luminaries.

The fonds contains letters, 1948-1958, to and from Dr. W.W. Francis. It also includes two poems by Francis, and a letter from the Dean of the Faculty of Medicine regarding death of Francis in 1959.

The fonds contains materials that Dr. M. Entin collected for his biography of Dr. Archibald. Mainly include articles relate to tuberculosis, pancreatitis, wound healing, history of surgery, and scientific writing. It also includes letters from Edward Archibald to Mrs. Archibald, letters to Archibald from William Osler and Sir Henry Gray, addenda of Archibald's world journey in 1936, and articles by Archibald.

Some draft chapters of the biography of Dr. Archibald and research data for 100th Anniversary of Royal Victoria Hospital can also be found in the fonds.

The fonds contains correspondence related to the Osler Library and its holdings with people such as Maude Abbott, Edward Archibald, William B. Bean, Edward Horton Bensley, Archibald Malloch, Casey Wood, as well as John Farquhar Fulton, Keeper of the Medical History Collections at Yale University's library; the fonds also contains a typescript of talks by W.W. Francis (titled "Showman's Patter") about books and other items held in the Osler Library.

Fonds consists of the personal and professional papers of Louis and Irene Kon including extensive correspondence between the Kon family. Included are materials relating to the founding of the Norman Bethune Foundation and Bethune memorials; the making of Ted Allan's movie, "Making of a Hero", including the conflict with Syd Gordon regarding creative differences; a manuscript draft and notes on Larry Stephenson's manuscript 'Two Petrals.'

The fonds consists primarily of letters written during World War I to Drake's sister Daisy Molson and sister's husband, John Dunham Molson. Letters are accompanied by transcriptions and biographical material prepared by Martha E. McKenna. Also included are newspaper clippings dated 1915-1918 on Drake and the Canadian Army Medical Corps hospital run by McGill, one pocket notebook documenting Drake's time with the CAMC in France from 1915-1916, and a membership card to the Royal Club for Ladies from Beyond the Seas, dated 1919.