T. Cades, Impronte Gemmarie dell'Instituto, 66/403;
M. H. Nevil Story-Maskelyne, The Marlborough Gems, Oxford, 1870, no. 304;
A. Graves, The Royal Academy of Arts: A Complete Dictionary of Contributors and their work from its foundation in 1769 to 1904, London, 1906, p. 181, no. 521 ['Marchant, Nathaniel, R.A. Gem Engraver … An impression from an intaglio, Hercules restoring Alcestes to Admetus. Vide Euripides'];
G. Lippold, Gemmen und Kameen des Altertums und der Neuzeit, Stuttgart, 1922, pl. 136.5;
G. Seidmann, 'Nathaniel Marchant, Gem-engraver 1739-1816', Walpole Society, LIII, London, 1987, pp. 24, 53-54, no. 58;
G. Seidmann, ‘An Eighteenth-Century Collector as Patron: The 4th Duke of Marlborough and the London Engravers’, Survivals, p. 269, fig. 13;
J. Boardman, D. Scarisbrick, C. Wagner and E. Zwierlein-Diehl, The Marlborough Gems formerly at Blenheim Palace, Oxford, 2009, p. 281, no. 672