Giovanni Antonio Canal ('Canaletto') was a Venetian painter, etcher and draughtsman.
Whistler apparently admired the work of Canaletto, despite or perhaps because of John Ruskin's criticism of it.
Whistler, James McNeill, The Gentle Art of Making Enemies, London, 1890 .
Bénézit, E., Dictionnaire des Peintres, Sculpteurs, Dessinateurs et Graveurs, 8 vols, Paris, 1956-61; Getty Research, website. ; The Grove Dictionary of Art Online, ed. L. Macy, http://www.groveart.com (accessed 2003).