Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-'44. By Brevet Capt. J. C. Frémont, of the Topographical Engineers, under the orders of Col. J. J. Abert, Chief of the Topographical Bureau. Printed by order of the Senate of the United States. JOHN CHARLES FRÉMONT.
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