[1864-1865] From surveys under the direction of Bvt. Brig. Gen. N. Michler, Maj. of Engineers and Bvt. Lieut. Col. P. S. Michie, Capt. of Engineers, by command of Bvt. Maj. Genl. A. A. Humphreys, Brig. Genl. & Chief of Engineers. Surveyed & drawn by Maj: