Great Britain. North American Boundary Commission (creator) 1861 (?) Monument on the Boundary at Kootenay West, Kootenay River [Northwest Boundary Survey / British North American Boundary Commission]
Identified in "The Golden Age of British Photography" (Aperture, 1984) as: "Stone pyramid on the Forty-ninth Parallel, on the right bank of the eastern intersection of the Kootenay River, cutting on left bank."