Photostatic reproductions and typescript copies of letters written to Edward Ermatinger (1797-1876) by Archibald McDonald, John Tod, and William Todd; and photostatic reproductions of Ermatinger's collection of songs sung by French-Canadian fur trappers ("Voyageurs"). Ermatinger was an employee for the Hudson's Bay Company from 1818 to 1828, and later was a postmaster, merchant, and banker in St. Thomas, Ontario, Canada.

Collection consists of photocopy typescript notes and comments, 51 pages, undated, on fur trade posts in the mid-19th century, including Fort Langley, British Columbia, Fort Walla Walla, Fort Vancouver, and other Hudson's Bay Company posts.