Map of the territory of the United States, west of the Mississippi River / prepared by authority of the Hon. the Secretary of War, in the office of the Chief of Engineers under the direction of Brig. Gen. A.A. Humphreys, Chief of Engrs. Bvt. Major GeneralFreyhold, Edward1879Includes text, sheet index, and inset of Territory of Alaska.Lacking sheet 4.Prime meridians: Greenwich and Washington.Relief shown by hachures.cartographic