Catalogues Raisonnés

• MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat. no. 716) as 'The Oratory'.

Books on Whistler

• Pennell, Elizabeth Robins, and Joseph Pennell, The Whistler Journal, Philadelphia, 1921, pp. 63-64.