"discovered," late 14c., past-participle adjective from find (v.). Expression and found attached to the wages or charges in old advertisements for job openings, traveling berths, etc., indicates that meals are provided. It comes from the expression to find one's self "to provide for one's self." "When a laborer engages to provide himself with victuals, he is said to find himself, or to receive day wages" [Bartlett, "Dictionary of Americanisms," 1848]. Hence, so much and found for "wages + meals provided."