Explorations and Surveys. War Department. Map No. 1. Rio Colorado of the West, explored by 1st Lieut. Joseph C. Ives, Topl. Engrs. under the direction of the Office of Explorations and Surveys. A.A. Humphreys, Capt. Topl. Engrs. in Charge, by order of the Hon. John B. Floyd, Secretary of War. 1858. Drawn by Frhr. F.W.v. Egloffstein. Topographer to the Expedition. Topography by Frhr. F.W.v. Egloffstein. Ruling by Samuel Sartain. Lettering by F. Courtenay.
