Author: Dougal, William H. - United States. Army of the Potomac. Engineer Dept - Abbot, Henry L. Source:Library of Congress - Maps Usage Rights: Publication Date: 1862 View Map
Author: Michie, Peter S. - Michler, N. (Nathaniel) - Michler, N. - Theikuhl, F. - Strasser, J. - Thompson, Gilbert - Weyss, J. E. Source:Library of Congress - Maps Usage Rights: Publication Date: 1867 View Map