Great Britain. North American Boundary Commission (creator) 1860-1861 Cutting the boundary line along the right bank of the Moyie River [Northwest Boundary Survey / British North American Boundary Commission]
Identified in The Golden Age of British Photography (Aperture, 1984) as: "Cutting the Forty-ninth Parallel, on the right bank of the Mooyie [Moyie] River, looking west, 1860-61."