Topographic map of Ohio and Indiana / compiled by Frank Leverett.
Relief indicated by contours.; "Eighteenth Annual Report Part IV PL. XXXIII."; "The contours are based chiefly upon railway altitudes. These data are supplemented by personal aneroid determinations both in Indiana and Ohio, and by notes furnished by members of the Indiana Survey. In Eastern Ohio available data are sufficient to map only the main areas standing above 1,000 feet, and are insufficient to supply other contours."; "J. Ottmann Lith. Co., Puck Bldg. N.Y."
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