The series consists of chiefly of letters written by Osler that Cushing collecting during the preparation of his biography, The Life of Sir William Osler, between the years of 1920 and 1924. The letters in the series include both originals and transcriptions. The series also contains accompanying notes (both by Cushing and by Osler), clippings, articles, and other ephemera related to Osler.

This series contains notes, drafts, research files, and correspondence pertaining to the funding, research, writing, and publication of Something Hidden and its spin-off film concerning Dr. Penfield’s life and work. This series is divided into four subseries: correspondence, research files, manuscript drafts, and memorabilia. The bulk of this section is various drafts of Something Hidden. Some primary material of the Penfields is interfiled with material in this series, presumably consulted in the preparation and editing of various portions of the manuscript.

Series consists of John Bell's textbook for McGill course Medical Jurisprudence, taught by Professor Duncan C. McCallum, M.D., in fall, 1864. Textbook is listed on the “Books Recommended to Students” list in the course calendar. Signature on inside cover: "John Bell October, 1864."

Series contains personal and professional correspondence dating between approximately 1865-1877.

Series contains documentation of Bell's professional work as a physician in Montreal, including the publication, "Mortality in Montreal," a statement of deaths in the city during the month of January, 1878, as well as his student notebooks and MD thesis.

Series includes miscellaneous textual records and artefacts belonging to Charles Lewis and Beatrice Maud Young Lewis.

Series contains material related to Charles Lewis’s pharmacy accreditation and practice. It contains diplomas, licenses, certificates, patent documents, catalogues, testimonials, notes, correspondence, legal documents, financial documents, business documents, and obituaries.

This series contains working papers, notes, drafts, articles, and ephemera compiled by Cushing during the preparation of his biography of Sir William Osler. The material is arranged alphabetically generally by topic or author. There are also two files of Cushing's correspondence related to the publication of the biography.

Series consists of bundles of manuscripts, drafts, some research-related correspondence, and other research materials. Many files between 103-213 are transcriptions or photocopies of research materials Abbott made, many from Canadian archives, during the course of her research into the history of medicine in Canada.