A map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean : by order of the executive of the United States in 1804, 5 & 6 /

Scale ca. 1:4,300,000.
Relief shown by hachures.
Meridian: London and Washington.
From Lewis, Meriwether, History of the expedition under the command of Captains Lewis and Clark, 1814.
Available also through the Library of Congress Web site as a raster image.
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