Catalogues Raisonnés
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MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat. no. 1241) as 'The butterfly on a farthing'.
Authored by Whistler
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Whistler, James McNeill, The Gentle Art of Making Enemies, London, 1890, repr. p. 19.
Last updated: 18th March 2021 by Margaret