Catalogues Raisonnés

• MacDonald, Margaret F., James McNeill Whistler. Drawings, Pastels and Watercolours. A Catalogue Raisonné, New Haven and London, 1995 (cat no. 14) as 'Portrait of John Richard Picard.'

Unpublished

• McDiarmid, K. R., 'Whistler's Mother: Her Life, Letters, & Journal', manuscript, Glasgow University Library, [ca 1936), p. 230.