Author: Krebs, Charles G. - United States. Army. Corps of Engineers - Gedney, J. F. - Abbot, Henry L. Source:Library of Congress - Maps Usage Rights: Publication Date: 1862 View Map
Author: Weyss, J. E. - United States. Army. Corps of Engineers - Michler, N. (Nathaniel) Source:Library of Congress - Maps Usage Rights: Publication Date: 1863 View Map