A great map of California and the large western territories from this important series of maps originating with Samuel Augustus Mitchell. The map is filled with early county configurations, the exploration routes of Lewis and Clark, Fremont, Kearney, and Cooke, and the Spanish and Oregon Trails. Washington and Oregon have their eastern boundaries in the Rocky Mountains adjoining Missouri Territory and county development is confined west of the Cascades. Utah Territory extends to Middle Park and Long's Peak in present-day Colorado where it borders Indian Territory. New Mexico Territory encompasses parts of present-day Colorado and Arizona and displays a pre-Gadsden Purchase border along the Gila River. County development in California is well underway except in the south. Decorative scroll borders. Published in 1854.