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. 14) as 'Portrait of John Richard Picard.'
Unpublished
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McDiarmid, K. R., 'Whistler's Mother: Her Life, Letters, & Journal', unpublished manuscript, Glasgow University Library, n.d., p. 230.
Last updated: 12th December 2018 by Margaret