File consists of legal documents regarding several estate claims, including a petition to the Court of King's Bench on behalf of Samuel Gerrard and Francis Des Rivières vs. John Waterhouse.

File consists of a letter from John Gregory to Henry Mackenzie, asking him to collect a debt for him from Charles Vaudry.

File includes five documents effected after the death of Roderick Mackenzie, including: a draft of Mackenzie's obituary; an invoice for the purchase of mourning goods; an affidavit testifying to the authenticity of Mackenzie's "testament olographe (holographic testament)" and requesting, on behalf of his widow, that the testament be executed; four documents detailing the division of Mackenzie's estate; and one-year lease for 12 Beaver Hall Terrace made out to Mackenzie's widow.

File contains court documents relating to the vacant estate of the late Simon McTavish (File 3).

Includes four letters sent to Mackenzie, Oldham & Co. The first letter requests that the Quebec merchants Burns & Woolsey hire a vessel for trade with Newfoundland. The second mentions waiting for the boat and articles paid by Caldwell, Fraser & Co. The third relates to the proper form of the certificates for half the pay of Capt. Osborne and Lieut. Fraser. The fourth relates to the contract for flour and mentions John Well(e)s who has just arrived with information that the Treaty of Trade & Commerce between Great Britain and the United States had been signed in London on Dec. 31st.

Includes two letters sent to Mackenzie, Oldham & Co. The first letter mentions getting 500 barrels of flour for Angus Shaw's posts and 100 barrels for themselves and discusses the possible hiring or purchase of the Desire (N.W. & Co. ship) by Mackenzie, Oldham & Co. The second letter mentions that Mr. Shaw wants to know whether they will be needing one of the vessels belonging to the King's Posts to bring down the flour.

Letter to Harvey Cushing from R.Tait McKenzie, 2014, Pine Street, Montreal, Quebec, Canada. Letter dated December 21st, 1920. Resumes the letters he received from Osler. As described on p. 495, in volume II, Osler wrote him during his early work with the War Office in the establishment of command depots for the re-training of wounded preparatory for their return to active service. He also mentioned a card about a statue he made of Capt. Drummond. Osler urged him to collect and write up his work for a war museum. Mentions a Case of a man from Khanawake (Caugnawagha) studied by Egerton Y. Davis. McKenzie's last visit to Osler was in 1916.

Letter to Harvey Cushing from Maude E. Abbott, The Medical Museum, McGill University, Montreal, Quebec, Canada. Mentions a letter regarding Ritchie's response to the request sent from James Carroll to become an organizing member of the International Association of Medical Museum. The response was filled out by Osler. Mentions the value of the letter to her as she is trying to get the Army Medical Museum to help them in establishing an exchange department of the Museums Association there, and she wants to show that it originated with the Curator of the Army Medical Museum.

Letter to William Osler from Robert Palmer Howard, Montreal, Quebec, Canada. Howard writes of Osler's intention to become an Oculist. Mr. Morgan, resident Surgeon at Moorfields, and formerly in charge of the eye-wards at Netley, wrote to Howard informing him that he would like to come to Montreal as an Oculist. If this were to happen it would seriously jeopardize Osler's hopes of making eye dissection his specialty.

Letter to William Osler from J. William Dawson, McGill University, Montreal, Quebec, Canada. Dawson writes to offer Osler the Chair in Botany at McGill University.