Catalogues Raisonnés

• MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat. no. 1139) as 'A Grey Note – Flags, Portsmouth'.

Catalogues 1855-1905

• Winter Exhibition, Royal Society of British Artists, London, 1887-1888 (cat. no. 235) as 'A Grey Note'.
• “Notes” – “Harmonies” – “Nocturnes”, H. Wunderlich & Co., New York, 1889 (cat. no. 33) as 'A Grey Note – Flags, Portsmouth'.

Newspapers 1855-1905

• Anon., 'Royal Society of British Artists', The Globe, London, 29 November 1887, p. 3.
• Anon., 'London Art Galleries', Manchester Courier, Manchester, 30 November 1887, p. 5.