Fine example of a very desirable map that Wheat found important enough to use as the frontis to Volume 4 of his Mapping the Transmississippi West. A very interesting map that has New Mexico, with three counties, extending between Texas and California. Utah encompasses all of today's Nevada and extends west to the Continental Divide in today's Colorado, with Fillmore City as it's capital. Locates several of Fremont's routes, proposed routes for the Pacific Railroad, the Spanish Trail, and much more. Decorative border. An increasingly difficult map to find.

References: Wheat (TMW) #832 (frontis); Phillips & LeGear #816, 6116, 6125.

Condition: A

Good color and impression. Light marginal toning.