Map: Settlement of the Oregon Boundary, 1846. (William Earl Weeks, Building the Continental Empire: American Expansion from the Revolution to the Civil War. Chicago, Ivan R. Dee, 1996. p.95. Map by Victor Thompson.)
Map: Settlement of the Oregon Boundary, 1846. (William Earl Weeks, Building the Continental Empire: American Expansion from the Revolution to the Civil War. Chicago, Ivan R. Dee, 1996. p.95. Map by Victor Thompson.)