Topographical map of the road from Missouri to Oregon (NBY 17397)

Scale (1,633,600). " 10 miles to the inch " (W 118°55'--W 94°20' N 47°19'--N 38°40').
Strip map in 7 sections detailing Freemont's 1842-1843 expedition on the Oregon Trail.
Relief shown by hachures.
Westport (Kansas City, Mo.) to Fort Walla Walla (Wash.), along stretches of the Kansas, Platte, Sweetwater, Bear, Snake, and Walla Walla river valleys; Extensive marginal include quotations from, 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 Captain J. C. Freemont, of the topographical engineers, under the orders of Col. J.J. Abert, chief of the Topographical Bureau. Washington, Gales and Seaton, 1845; Identifies Indian tribal regions and includes " meteorological observations ".
Variant edition without E. Weber & Co.'s imprint issued in, Senate executive document (United States. Congress. Senate), 30th Congress, 2nd Session, no. 145 (Serial Set 546).