From the Transactions of the Royal Society of Canada, Third Series, Section II, Volume XXXVI. Arthur S. Morton was a professor of History at the University of Saskatchewan as well as the University’s Librarian. In this article, he discusses a series of Hudson’s Bay Company and North West Company fur trading posts along the Assiniboine River (most in present-day Saskatchewan). Morton investigates the origins, locations, residents, and interactions of Cuthbert Grant’s House, Marlboro House, Albany House, Fort Alexandria, Carlton House, and Fort Pelly in the late 1700s and early 1800s. Throughout, Morton relies on a hybrid archival/investigative methodology. He examines primary sources to determine the posts’ approximate locations, enlists local assistance with parsing unclear or vague directions, and then travels (several times, with Grant MacEwan) to the approximate location to see the posts’ remains/sites for himself. Includes a 34.5 x 35.5 cm (13.5 x 14 in) fold-out map. Offprint.