Cartography AssociatesDavid Rumsey CollectionGray, O. W. (Ormando Wyllis), 1829-1912Stedman, Brown & Lyon.Walling, Henry Francis, 1825-18881 map : hand col. ; 36 x 26 cm.Includes "Section through northern Ohio," "Section from Cincinnati to Marietta," and explanation of colors.JPEGG 4081 .C5 1872 .N400936149439015091901457engPublicGeological Map of OhioMapsOhio1872University of Michigan