At top of plate: 'U.S. geographical surveys west of the one-hundredth meridian. Parts of California, S.E. Nevada, Arizona & S.W. Utah.' At bottom of plate: 'Expeditions of 1872 & 1873, under the command of 1st Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army.' 'G. K. Gilbert, A. R. Marvine, E. E. Howell, geological assistants.' 'By order of The Honorable The Secretary of War, under the direction of Brig. Gen. A. A. Humphries, Chief of Engineers, U.S. Army.' Published by Government Printing Office. 2 map sections on 1 sheet. Scale: 1 inch to 8 miles.
The description that came with the photograph: "Zilpha was the first white child born in the Las Vegas Valley at Old Fort. She was born on August 20, 1856 in Las Vegas Springs Mormon Mission, Territory of Nevada."