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

Consisting of documents detailing the 1785 travels and observations of Joseph Hadfield through the Northwest fur trade of North America and to Niagara Falls (probably written after 1810). Observations are primarily economic in nature; however, there are also references to the geographical and cultural surroundings.

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.

This material comprises a group of official documents, and correspondence among various partners. The official documents include four articles of agreement for partnership between various Montréal companies, largely with McTavish, Frobisher and Co., 1790-1802, and a memorandum on the effect of exchange differences on the partners' shares (approximately 1826). The partners' correspondence, approximately 1792-1808, contains letters from Simon McTavish, Isaac Todd, and Alexander Mackenzie concerning provisions, business agreements and loans. A letter from William McGillivray to Mr Justice Reid discusses family matters. One financial ledger for the North West Company contains business accounts and records transactions. The bulk of entries are dated from January 1810 to November 1825, with some entries dated 1861.

A collection of documents from the life of Simon McTavish including a letter to his creditors and a series of legal opinions on the estate of Simon and William McGillivray. Documents' informational value is largely financial in nature.