Nash's papers comprise original illustrations for Nouveau Poor by Belinda Blinders, edited by Desmond Cooke (1921), together with drawings for and letters concerning L.de G. Sieveking's Dressing Gowns and Glue (1921).

Leoni's manuscript of "Li cinque ordini dell'Architettura civile nelle Misre di Palladio con altri Studi..." was written in Dusseldorf in 1708, and illustrated with Leoni's own drawings. This treatise was never published.

Catalogue of books in King's library in Montréal.

Album written by Mary Kingsley, comprising 17 poems

This collection includes the original manuscript for his History of Canada as well as a large quantity of notes collected for the history.

Fonds consists of original manuscript for the romantic opera, "Conrad, or, The Heir of Holstein," adapted from Matthew Gregory Lewis's One O'Clock. Libretto was composed by W. H. Bellamy and music by William Hutchins Callcott.

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.

The collection consists of falls into two series: Papers and Diaries. The Papers primarily reflect Brown's political concerns and activities in Montreal between 1832 and 1838. They include excerpts from the Vindicator newspaper, notes, resolutions, memoranda and speeches, as well as letters to Brown concerning Florida politics and the United States' negotiations with Native peoples, 1841-1843. There are also business documents and letters; essays by Brown on the 1837-1838 Lower Canada Rebellion and the annexation of Canada; and a journal kept during an ocean voyage in 1838.

The Diaries consist of seven notebooks written in pencil, or perhaps more properly dictated, by Brown in 1887-1888. They were transcribed by F. J. Nobbs in 1987.

Fonds consists of a late seventeenth-century manuscript containing a critical commentary on Machiavelli's The Price, created for the use of Agostino Cerretari.

This collection consists of letters to Sir James Craig and others on the subject of Lower Canada, 1810-1815.