Author: Vernam, John S. - Benham, Henry Washington - Woodbury, Daniel P. (Daniel Phineas) - United States Coast Survey - United States. Army of the Potomac. Engineer Brigade Source:Library of Congress - Maps Usage Rights: Publication Date: 1863 View Map
Author: D. Van Nostrand Company - Confederate States of America. Army. Corps of Engineers - Robinson, S. , (Sampson ) - Hotchkiss, Jedediah - Barnard, William S. Source:Library of Congress - Maps Usage Rights: Publication Date: 1866 View Map