Joseph Mallord William Turner was a painter.
His work was first copied (Copy after Turner's 'Rockets and blue lights (close at hand) to warn steam-boats of shoal water' m0176), then both admired and rejected by Whistler.
Butlin, Martin, and Evelyn Joll, The Paintings of J. M. W. Turner, London and New Haven, 1984; Dictionary of National Biography, Oxford, 2004. Grove Dictionary of Art Online. Lochnan, Katharine A., Turner, Whistler, Monet: Impressionist Visions, Art Gallery of Ontario, Toronto, Tate Britain, London, 2004.