Catalogues Raisonnés

• MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat. no. 1076) as 'Harmony in Blue and Violet'.

Catalogues 1855-1905

• Possibly Winter Exhibition, Society of British Artists, London, 1885 (cat. no. 566) as 'Harmony in Opal and Violet'.

Books on Whistler

• Merrill, Linda, With Kindest Regards. The Correspondence of Charles Lang Freer and James McNeill Whistler, 1890-1903, Washington, DC, and London, 1995, p. 54, pl. 6.

Catalogues 1906-Present

• Curry, David Park, James McNeill Whistler at the Freer Gallery of Art, New York and London, 1984, p. 270, pl. 268.

Websites

• Freer Gallery of Art website at https://asia.si.edu/object/F1890.8a-b.