This collection contains a deed of assignment prepared for the firm Patterson and Co., created on 17 April 1811, with several renewals and additions, the last of which was on 22 June 1814. The deed of assignment includes many merchants and firms as attorneys or signatories, many of whom were involved in the fur trade and the North West Company.

The David Hume Collection contains letters and other ephemera brought together from multiple acquisitions. The principal manuscripts are found in is the bound volume containing letters from David Hume to the Comtesse de Boufflers. There are also letters from Jean-Jacques Rousseau and others for a total of 59 letters. This collection of letters was the basis for the anonymously edited Private Correspondence of David Hume with Several Distinguished Persons, Between the Years 1761 and 1776. Now First Published From the Originals. (London: Printed for Henry Colburn and Co., 1820.) One of the McGill copies of this book belonged to the Montreal lawyer and book collector Frederick Griffin (1798-1877). In addition to this volume there are eight other Hume letters. Some of these have been published by Professor Klibansky and Ernest C. Mosser in New Letters of David Hume. (Oxford: Clarendon Press, 1954). Finally, there are photographic copies of Hume manuscripts held by the Royal Society of Edinburgh and typed copies of official letters on Canada from the manuscripts of Sir Mark Dalrymple.

Collection contains letters, memorial, other documents dealing with the cultivation of hemp in Lower Canada, including those of Jesse J. P. Pennoyer.

These are letters from Selkirk to Miles MacDonnell, 1811-1813 and instructions concerning wages and contracts. Thirteen documents concern Lord Selkirk's conflict with the North West Company at the Red River Colony and Fort William.There is also a letter to Colonel Benjamin Walker, 1816.

2 albums of photographs by Notman, of the house, grounds, and stables at Ravenscrag.

Collection consists of Canadiana assembled by Charles Kadwell: Canadiana: or, A medley of sundry matters in print and manuscript, relating principally to the Canadas; (during the period of the rebel-lions;) the other British North American colonies; and the neighbouring United States; with views, maps, plans, portraits, &c. and private journals. 2 vol. Folio. Vol 1 includes "Remarks during a voyage from London to Montreal in the year 1832"; "Notes during a trip from Montreal to Upper Canada... 3rd-18th August 1838"; "Calendar of remarkable events relating to British North America and the United States". Mostly cuttings from newspapers. A pedigree of the Kadwell family has been inserted by L.G. Macdonald, Q.C., and annotated by Robert Howard. Vol. 2, mostly newspapers.

This collection consists of translations from Terence, begun in 1778, and correspondence on military, political and private matters, 1787-1821, mostly addressed to Thomas Coutts, banker.

Collection consists of papers of a British naval officer, who sailed on the Bounty. Includes notes and observations on voyages in the South Atlantic and East Indies including directions for navigating the Straits of Banquey and other oriental passages (1801), notes on the Cape of Good Hope (1796) and St. Helena (1805). Also, "Nautical Remarks and Memoranda of Occurences on Board H.M.S. Polyphemus, Donegal and Nereus between 22 Oct. 1806 and 19 Nov. 1810". With a note on reason and a chart of the Road of Basque. Items marked "Morgan" on paper watermarked 1797 and 1805.

Three letters from Seaton relating to the Rebellion of 1837, including a letter to General Fitzroy Sommerset about the capture of St-Eustache.

Collection consists of correspondence from J.W.A. Hickson between 1912 and 1956.