The British landscape tradition is epitomized by two great 19th-century painters -- John Constable, with his country scenes under billowing whipped-cream clouds, and J.M.W. Turner with his chromatic ecstasies. Yet both men owe a great deal to a much less well-known British artist, Richard Wilson (ca. 1713-1782). In fact, Constable and Turner both owned works by him and hailed his art.