U.S. Geographical Surveys west of the 100th meridian - Central & Western Utah. Atlas sheet number 50. 1877, John E. Weyss

U. S. Geographical surveys west of the 100th meridian - central & western utah. Atlas sheet number 50. Inscriptions: "weyss, herman & aguirre, del. " "expeditions of 1872 & 1873. Under the command of 1st lieut. George m. Wheeler, corps of engineers, u. S. Army" "by order of the honorable the secretary of war. Under the direction of brig. Gen. A. A. Humphreys, chief of engineers, u. S. Army. " "g. K. Gilbert, a. R. Marvine, e. E. Howell geological assistants. ". Date: 1877.