Very nice geological survey map of parts of the Mojave Desrt and the New River (from Salton Sea), as explored by R Williamson and issued by the War Department. This is part of the very large effort to survey the land in conjunction with the construction of the Pacific Rail Road. Uncolored.
1853-4 Botanical Profile Map for Pacific RR Through New Mexico and Arizona
Botanical Profile Representing the Forest Trees Along the Route Explored by Lieut. A. W. Whipple, Corps of Topl Eng.rs Near the Parallel of 35 (o) North Latitude -- from Fort Smith to San Pedro
Map Maker Specifics
J Bigelow / A Whipple, 1854, Washington
20.8 x 47.5 in. plus margins
Very good. Original color, very little age toning in margins. One 3-4 in. tear at fold and slightly beyond. Issued folds.