Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 145.
GUERNSEY COUNTY, situated toward the easterly part of Ohio. Area, 676 square miles. Face of the country generally hilly; soil of middling quality; along the valley of Wells creek, its principal stream, excellent. Seat of justice, Cambridge. Pop. in 1810, 3,051; in 1820 9,292; in 1830, 18,036; in 1840, 27,748; in 1850, 30,438.