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.

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

These are various business papers of Simon McTavish and include partnership agreements with William and Duncan McGillivray, William Hallowell, Roderick McKenzie, Angus Shaw and James Hallowell, 1806 and drafts of agreement for seven years between McTavish, Frobisher and Company and John Fraser of London, Simon McGillivray and John Tullon, 1805.

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.

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

Manuscript copy from shorthand notes of proceedings in the Court of Queen's Bench, 12 January, 1839 to 25 January, 1839, concerning an appeal for the release of 12 Canadians from a transportation sentence for taking part in the 1837 Rebellion.

This collection consists of contemporary copies of letters written by T. Blackwood from Michilimackinac to James and Andrew McGill & Co., to Ch. Chaboillez, and to T. and J. McGregor.

These records consist of minutes of meetings of the Presbyterian Committee of Laprairie, 1837-1843, and two registers of baptisms, marriages, and burials at Laprairie, 1839 and 1842-1843.

Consists of notes on the Rideau Canal's traffic.

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.