John Hayward, Gazetteer of the United States of America… (Philadelphia: James L. Gihon, 1854), 325.
Chautauque County, N. Y., c. h. at Chautauque. The most W. county in the state. Bounded N. by Lake Erie, and S. and W. by Pennsylvania. Watered by Chautauque, Cassadaga, and Bear Lakes, and by Chautauque, Canadawa, French, Silver, Cassadaga, and Connewango Creeks, and the outlet to Chautauque Lake. The surface is hilly, a ridge extending parallel to the lake, and at a distance of from five to eight miles from it, which is elevated in some places to the height of 1400 feet. The soil is fertile, especially along the borders of the lake and principal streams. There are several gas springs in this county, some giving forth carburetted and others sulphuretted hydrogen gas. The most remarkable localities of the former are at Fredonia, West- field, and Van Buren Harbor. Bog iron ore, alum, copperas, and shell marl are also found in considerable quantities.