[Topographical survey of the Rocky Mountains] : Simpson's Pass sheet
Title from map index sheet. At head of map: Topographical Survey of Canada. "Topographical Surveys Branch, Department of the Interior." "Triangulation by W.S. Drewry, D.L.S.; topography by J.J. McArthur, D.L.S." Maps produced with phototopography. Shows continental watershed, boundary between the Province of British Columbia and the North-West Territories.