Hudson's Bay Co. fort at outlet of Rainy Lake, built in 1820 near site of old French fort St. Pierre (which see). It was located two miles down the Rainy river from the lake and was named Fort Frances after the wife of Sir George Simpson. It was surrounded by stockades 10 feet high. A description is given in Grant's "Ocean to Ocean" 1872. This post was operated by the Company until about 1900 and was finally listed in 1894. Shown on Arrowsmith map 1857 (No. 8).