The William Osler Collection spans his entire medical career. Series include correspondence, personal and biographical materials, collected notes on medical conditions, publications, and photographs. There is an extensive group of letters from Osler to Henry Barton Jacobs covering the period 1905-1919. The majority of the Osler Papers at the Alan Mason Chesney Medical Archives are notes, case histories, letters, photographs, and journal articles on a vast range of diseases and medical conditions. The collection also includes material culture objects associated with William Osler and a few personal documents related to his son Revere Osler. A larger collection of Osler's personal papers is located in the Osler Library at McGill University in Montreal.