File consists of personal and family correspondence from Esther and Abraham de Sola and their children as well as business related correspondence to both Abraham and Aaron David Meldola de Sola.

File contains 2 handwritten manuscript copies of the personal writings of Joseph Hadfield and his observations during his time in the fur trade. Hadfield mentions the role of traders making expeditions to the West and North West to barter with Indigenous communities for furs. He describes in detail how voyages were made from Montreal through Lake Ontario and Erie to Detroit by traders. Handfield provides lists of trade goods that he judged necessary for these traders to carry for barter and lists the skins received in exchange for goods. He lists the particular details of one cargo carried by canoe, with quantities and weight and value of goods transported. He also details which geographical regions are good for fur trapping (including Detroit, Michilimackinac, and Grand Portage) and provides pricing information for different types of animal skins, and distances traveled by traders. Includes very brief descriptions of activities of Indigenous community in the Northwest Canada/Detroit region and European fur trader settlements.

Also included the file are two letters written by Hadfield's granddaughter, Miss A. Hadfield, to Dr. G. R. Lomer of McGill University. The letters explain that Miss Hadfield had in her possession these accounts of her grandfather and she was inquiring to their informational value.

File contains an account of the visit of Joseph Hadfield to the Niagara Falls and surrounding area. A description of the Falls is given. Hadfield outlines his activities and travels in the summer of 1785. Some physical description of the Great Lakes area is given.

File contains 1 bound volume consisting of copies of correspondence written by Joseph Frobisher while he held an important role in the North West Co. from 15th April 1787 to 20th October 1788. All letters written from Montreal and sent to various business relations.

File contains 2 items which are copies of legal documents. One is an extract of the creation of the Seigneurie de La Prairie-de-la-Magdeleine. The other is an account written over many month of the transfer of lands and moneys involving James McGill.

File contains 2 documents (copies) from the beginning of the North West Company. One document is a copy of the preamble and signatures from the 1790 North West Company articles of agreement signed at the company's many depot in Grand Portage on the shores of Lake Superior. This document outlines the division of the shares among the various NWC partners. The other document is a copy of the 1792 business agreement between the North West Co. and the Grant Campion Co.

Collection of correspondence, general ledger pages, financial receipts, and contractual agreements in relation to McDonald's involvement in the North-West Company and the North American Fur trade.

Included in the file are two letters addressed to a Mr. A. de Lery MacDonald or McDonald of Montreal (1921-1922). These appear to be legal council in reference to the contractual agreements or land holdings of John McDonald of Garth mentioned in the petitions and contracts also contained in the file.

File contains a 6 year business agreement including Todd McGill and Co. and Forsyth Richardson and Co. as partners in the North West Co. in 1792.