1. Map showing detailed topography of the country traversed by the reconnaissance expedition through southern & southeastern Nevada Yale Public content 1870. 2002-08-06T20:53:42Z. 2022-03-21T03:52:48Z. United States. Army. Corps of Engineers. Engineer Office. Engineer Office, Headquarters, Dept. of California, Photolith. by the N.Y. Lithg. Engrg. & Prtg. Co.). English. Public. Nevada.