Map of n. eastern Virginia and vicinity of Washington
Accompanied by sheet: Presented to Brig. Genl. S. Williams, A.A. Genl. Hd. Qrs. Army, by order of Maj. Genl. McClellan, Comd. in Chf. U.S.A. [signed] A.W. Whipple, Maj. T.E.  leaf ; 21 x 13 cm. At head of title: Surveys for military defences. Includes "Data used in compilation," table of "Elevations above tide water," and "Geological profile of Loudoun County." Mounted on cloth...
United States. War Dept. Corps of Topographical Engineers - McDowell, Irvin - Schedler, J.