Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 374.
WALWORTH COUNTY, situated on the south boundary of Wisconsin, with Geneva lake at the south. Area, 675 square miles. Face of the country, undulating; soil, rich. Seat of justice, Elkhorn. Pop. in 1840, 2,611; in 1850, 17,862.