Report of a reconnaissance and survey in California, in connexion with explorations for a practical railway route from the Mississippi River to the Pacific Ocean in 1853 / by R.S. Williamson.

Also published in: Report of the Secretary of War communicating the several Pacific railroad explorations, v. 3, report X.

Wagner-Camp (4th ed.), 261:3b

Includes the "Preliminary geological report by William P. Blake, geologist and mineralogist of the survey."

Plates: [1] General map of a survey of California in connection with examinations for railroad routes to the Pacific Ocean made by order of the War Department, by R.S. Williamson ... [2] Route of a survey from the Pimas villages on the Rio-Gila to Mesilla on the Rio-Bravo-Del-Norte with a view to determine the practicability of a railroad from the Mississippi to the Pacific Ocean, made by Jno. G. Parke ...

With: Parke, John G. Report of explorations for that portion of a railway route, near the thirty-second parallel of latitude ... [Washington : s.n., 1855]