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 drawn by Frhr
Relief shown by shading and hachures.; Also shows routes of exploration.; At head of title: Explorations and Surveys, War Department, map no. 2.
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