This tinted lithograph of “Fort Massachusetts at the Foot of the Sierra Blanca Valley of San Luis" was produced by Thomas Sinclair (1805-1881), Philadelphia, after a sketch by John Mix Stanley (1814-1872) and an original sketch by expedition artist R. H. Kern (1821-1853). It was printed as a plate in Volume II following page 38, in the "Report of Explorations for a Route for the Pacific Railroad, by Captain J. W. Gunnison (1812-1853), Topographical Engineers, Near the 38th and 39th Parallels of North Latitude, from the Mouth of the Kansas River, Missouri to the Sevier Lake in the Great Basin" by Lieutenant E. G. Beckwith (1818-1881), Third Artillery.
The volume was printed as part of the "Reports of Explorations and Surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean" in 1855 by A. P. O. Nicholson (1808-1876) of Washington, D.C.
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