Fonds contains correspondence mostly between George Dock and Sir William Osler but also with Lady Osler, W.W. Francis and Archibald Malloch, from 1891 to 1919. The fonds includes 106 letters, originals and carbon copies.

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.

The fonds consists of books, letters, documents, drafts, publications, photographs, and several artifacts collected by W. W. Francis and Marian Francis Kelen over the course of their lifetimes. Many books and documents relate to Sir William Osler and the Osler family including several personal letters, the Deed of Trust documents regarding the Bibliotheca Osleriana, drafts of Osler's works, and a wooden travelling trunk that belonged to Edward Revere Osler. The fonds also includes original poetry written by Marian Osborne, W. W. Francis, and Marian Francis Kelen.

Letter to Grace Revere Osler from Rudyard Kipling, Bateman's, Burwash, Sussex, England. Kipling is glad to know that Grace found Revere's grave properly tended to. He comments on the need to honour and remember those who die in war.

Letter to Grace Revere Osler from Edward Revere Osler. Revere writes of a trip to the dump and describes the desolation he witnessed at the front. He writes that the death and destruction caused by the war inspires the novice at war, like himself, with more that mere horror; it inspires complete depression.

Letter to Grace Revere Osler from Edward Revere Osler. Revere reports on his observations and experiences at the front and on the activities of his battery.