Philadelphia: Thomas, Cowperthwait and Co. (Cowperthwait, Desilver, Butler), 1854. Very Good. First Edition. [17x13.75in sheet, 15.5x12.5in neatline]; A map of the Western United States from the borders of Mexico to British America, with pale green neatline designed border and hand-colored to highlight the California State boundary and the listed Territories, with counties, sub-territories, Indian tribes, with details of cities, communities, trails, waterways, and topography; Some spotty age toning to edges and map, several chips to edges not affecting neatline, closed 1in tear to top edges, small rubbed spot to upper left corner. [Wheat Trans-Miss 813, Wheat Gold Rush Maps 266, Rumsey Collection 558.001]. Item #13874
This map was updated from previous versions due to the rapid changes in the political boundaries of the West. This map includes the United States and Mexico border at the Gila River with the continuing negotiations on the New Mexico and Texas territories, and shows both the Bartlett and Graham border lines before the Gadsden Purchase was finalized in April, 1854.
Earlier versions were part of Mitchell's Atlas issued in 1850 and 1852. For California, the earlier maps highlighted the gold districts and did not included the counties or changes to the other Territories. This map was included in the Mitchell's Universal Atlas issued in early 1854 before the Gadsden purchase and the current US Mexico boundary was established.