Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 104.
DELAWARE COUNTY, situated in the central part of Ohio. Area, 610 square miles. Watered by Scioto and Whetstone rivers. Face of the country flat or rolling; soil generally productive. Seat of justice, Delaware. Pop. in 1820, 7,639; in 1830, 11,523; in 1840, 23,060; in 1850, 21,817.