Ellen D'Oench "Copper into Gold": Prints by John Raphael Smith, 1751–1812. New Haven and London, 1999, cat. no. 146, p. 206.
John Chaloner Smith British Mezzotinto Portraits...from the introduction of the art to the early part of the present century. Henry Sotheran & Company, vols. 1-4, 1878–83, vol. III, p. 1260, no. 45 i.
Julia Frankau John Raphael Smith: His Life and Works. London, 1902, cat. no. 89 i/iv, pp. 96-7.
Charles E. Russell English Mezzotinto Portraits and Their States. vol. II, London and New York, 1926, cat. no. 45, p. 285.