William Sidney Mount, an American painter, born in Setauket, L. I., Nov. 26, 1807, died there, Nov. 19, 1868. In 1826 he entered the school of the national academy of design, in 1828 painted his first picture, a portrait of himself, and produced afterward in New York "The Daughter of Jairus," a full-length portrait of Bishop Onderdonk, and several clever portraits of children, which gave him reputation; but he soon returned to Setauket, where he devoted himself wholly to genre art. His first picture of this class, a "Rustic Dance," was exhibited in New York in 1830, and was followed in succeeding years by "Husking Corn," "Walking the Crack," "Farmers Nooning," "Wringing the Pigs," " Turning the Grindstone," "The Raffle," "The Courtship," "Boys Gambling in a Barn," "Turn of the Leaf," "The Power of Music," "Music is Contagious," "Raffling for a Goose," "Just in Time," -California News," "Banjo Player," "Dance of the Haymakers," and others, most of which are in private galleries in New York, and " Bargaining for a Horse," in the New York historical society's collection.

He excelled especially in humorous pictures of American rustic Life, and in delineations of negro life and physiognomy.