Fanning's Illustrated Gazetteer of the United States.... (New York: Phelps, Fanning & Co., 1853), 18.
ADDISON COUNTY, in the west part of Vermont, lying along Lake Champlain. It has a mean length of 25 miles, and an average breadth of 20, and containing 500 square miles. The surface, although not mountainous, is agreeably diversified by hill and dale, the soil fertile, generally well-cultivated, and suitable for grazing and staple crops. Otter river flows obliquely through this county, which, by its numerous tributaries, affords several excellent mill sites. Courts are held at Maddlebury. Pop. in 1820, 20,620; in 1830, 24,940; in 1840, 23,583; in 1850, 26,549.