This fine map of California and the large western territories is 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 at the Continental Divide with their limited county development confined to west of the Cascades. Utah Territory extends to Middle Park and Long's Peak in present-day Colorado and its eastern border with Nebraska and Kansas. The three vertical counties of Carson, Humboldt and St. Marys form the beginnings of what will become Nevada. The Proposed Arazonia Territory is demarcated between the Gila River and the Gadsden Treaty Line with the majority of this area labeled Uninhabited Region. With Desilver's unique and delicate scroll border and his imprint at No. 251 Market Street, Philadelphia below the title. A beautiful example of this increasingly difficult map to obtain.

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Condition: A

Near fine example with dark early impression and original hand coloring. Some insignificant spots in lower blank margin, else fine.