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.
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.