The fonds consists of photocopies of letters from Captain Robert Stewart to George Washington in which he discusses his plans either to raise a battalion in return for a commission as Major Commandant or to return to Great Britain and purchase a company and become involved in trade. Later letters include descriptions of the Island of St. John, references to Captain Holland's survey, and accounts of the proposed methods and final procedures of granting the lands on the Island and his endeavours to be one of the grantees.

This fonds consists of two letterbooks as well as a "general ledger and notebook". The letterbooks, which span the years 1821 to 1836, contain handwritten transcriptions of letters to and from various business and government contacts concerning the Stewarts' estates in PEI. These letterbooks were maintained by David Stewart and his brother Robert. The "General Ledger and Permanent Notebook of Surveys, Accounts, etc." was kept by Robert Bruce Stewart between 1847 and 1864.