1. Illinois, Morris sheet Maps University Of Illinois Urbana Champaign Public content 1892. Gannett, Henry, 1846-1914, Harrison, D. C., and Renshawe, John H. Contour interval 10 feet.;"Surveyed in 1890.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).