Reports of Explorations and Surveys, to Ascertain the most Practicable and Economical Route for a Railroad from the Mississippi River to the Pacific Ocean.[Vol. VI:] The Sacramento Valley to the Columbia River, made by Lieut. R. S. Williamson [including Botany and Zoology vols.] Washington: Beverley Tucker, 1857. 3 parts in one (only), 4to. 22 tinted lithographed plates, table, 27 plates, of which two hand-coloured (some light staining and spotting). Original cloth (worn, upper cover detached). Provenance: North Carolina State Library (label). [?]Not in Sabin. With General Report upon the Zoology of the Several Pacific Railroad Routes (Washington, 1857, vol. VIII, lithographed plates, unbound). Sold not subject to return. (2)