Montana Territory / prepared by order of Maj. Genl. W.S. Hancock ; compiled under direction of Lieut. Edward Maguire, Corps of Eng'rs by Prvt. Julius J. Durage, Topog'l. Asst.1878"Brig. Genl. A.A. Humphreys, Chief of Engineers ; Compiled under direction of Capt. D.P. Heap, Corps of Engineers, W.H. Wood, May 1872."Relief shown by hachures.Shows battle sites and military expeditions (with dates).Westernmost sheet: "2nd edition May 1875 compiled under direction of Capt. Wm. Ludlow, Corps of Engrs."--Lower left margin. Sheet shows events dated 1877.cartographic