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. 1562) as 'r.: Butterfly 'Encountered'; v.: Butterfly'.
Authored by Whistler
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Whistler, James McNeill, Eden versus Whistler: The Baronet and the Butterfly. A Valentine with a Verdict, Paris: Louis-Henry May, 1899, p. xxiii.
Websites
- Clarke, Jay A., and Sarah Kelly Oehler, eds., Whistler Paintings and Drawings at the Art Institute of Chicago, The Art Institute of Chicago, 2020, website (cat. no. 43).
- 'Cats. 40–47 Butterflies and Club: Tombstone,' in Whistler Paintings and Drawings at the Art Institute of Chicago (The Art Institute of Chicago, 2020) URL (cat. no. 43) as 'Butterfly “Encountered” (recto); Sketch for Tailpiece (verso)'.
Last updated: 11th December 2020 by Margaret