Ord, Edward Otho Cresap, 1818-1883 and Duval, Peter S., 1804 or 1805-1886. E.O.C. O. Lt. U.S.A. ; P.S. Duval's Lith steam Press Phila. Relief shown by hachures. Latitudinal and longitudinal lines. Coordinates approximate a... P.S. Duval's Lith steam Press,.