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: J. E. Weyss