Envisaging the West: Thomas Jefferson and the Roots of Lewis and Clark


A Map Exhibiting Mackenzie's Track

Mapmaker, Alexander Mackenzie, 1801

"A Map of America between Latitudes 40 and 70 North, and Longitudes 45 and 180 West, Exhibiting Mackenzie's Track." In Voyages from Montreal, on the River St. Laurence, through the Continent of North America to the Frozen and Pacific Oceans; In the Years 1789 and 1793.

Library of Congress, Geography and Map Division.