Frobisher's papers comprise a letterbook of the North-West Co. containing copies of letters written by Frobisher from April 1787 to October 1788, two original letters to Simon McTavish, 1796, and one from him, 1787, business and legal documents, largely concerning the estate of James McGill, 1810-1834, and a diary, 1806-1810, mostly a record of where he dined.

This material documents the estate of Mrs. Charlotte Frobisher and includes a copy of her will and an inventory, 1820.

The collection contains business and family correspondence, land grants, financial and judicial records, etc. of the seigneurial families Chartier de Lotbinière, Rigaud de Vaudreuil, Lefebvre de Bellefeuille, Lemoyne de Longueuil, Lambert Dumont, Chaussegros de Léry, Hertel, Harwood, and of allied families. Much of the material concerns the Seigneurie de Vaudreuil. Other material include correspondence (1809-1821) with Joseph Bouchette; extracts from the registers (1667, 1732) of the Conseil Souverain and the Conseil Superieur; and documents concerning Newton Township, the Seigneurie des Mille-Iles.

Fonds consists of many examples of Szyk's illustrations in the form of prints, commercially-reproduced illustrations, and drawing studies, as well as printed ephemera. Examples of Szyk's illustrations reproduced on commercial products or other items include postage stamps, posters, book jackets, and calendars. The fonds contains ephemera related to or containing Szyk illustrations, including newspaper clippings and issues of magazines featuring articles on Szyk or reproducing one of his designs. Box 10 contains original drawing studies, mostly for the Book of Esther. The fonds also contains materials related to an exhibition on Szyk at McGill University Library held in 1954.

The collection consists of documents amassed by Roderick Mackenzie. Among the Masson manuscripts there are other series of letters; as well as journals kept by North-Westers and various business documents. Some of this material exists as originals; others are contemporary copies - the George Keith letters for example are contemporary copies on paper watermarked 1827. The collection also includes some duplicate texts - contemporary copies or later nineteenth-century copies that in some cases represent edited versions of the texts. Samuel Wilcocke's account of the death of Benjamin Frobisher exists in a draft original (or contemporary copy) and in a late nineteenth-century clean copy. Of course Benjamin Frobisher did not die in the dramatic circumstances as recorded by Wilcocke, but peacefully in Quebec City in 1821.

The collection includes three warrants to Richard, Earl of Ranelagh concerning payment of troops, 1694-1697 and a signed document in Dutch concerning a Colonel van de Ruyterye, 1702.

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.