Copy of a portion of map of the North-West territory of the Province of Canada : from actual survey during the years 1798 to 1812 / by David Thompson.Thompson, David, 1770-185719--?]"This map made for the North West Company in 1813 and 1814 ...."Covers British Columbia, portions of Alberta, and U.S. Pacific Northwest.Includes text.Relief shown by hachures.Reprint of 1814[?] map.cartographic