Map of an exploring expedition to the Rocky Mountains in the year 1842 and to Oregon & north California in the years 1843-44 / by Brevet Capt. J.C. Frémont of the Corps of Topographical Engineers under the orders of Col. J.J. Abert, Chief of the Topograp
from Parts (In 3 layers) Depicts: 1845 Last modified about 10 years ago. 11 control points.
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