. . . . . . "Prof. E.B. Andrews on the coal and iron deposits in Perry County, Ohio. Hon. Thomas Ewing, Lancaster, Ohio, Sir"@en . . "Maps"@en . . "Letters"@en . . . "Coal and iron deposits in Perry County, Ohio"@en . "Letter of Prof. E.B. Andrews, : (of the Ohio Geological Corps,) on the coal and iron deposits of the Upper Sunday Creek and Moxahala Valleys, in Perry County, Ohio"@en . . "Hand-colored plates"@en . . .