Gustave Dreyfus [1837-1914], Paris; his estate; purchased 1930 by (Duveen Brothers, Inc., London and New York); purchased 1945 by the Samuel H. Kress Foundation, New York; gift 1957 to NGA.
- Ricci, Seymour de. The Gustave Dreyfus Collection. Reliefs and Plaquettes. Oxford, 1931. vol.II, 193.
- Pope-Hennessy, John W. Renaissance Bronzes from the Samuel H. Kress Collection: Reliefs, Plaquettes, Statuettes, Utensils and Mortars. London, 1965: no. 178.
- Rossi, Francesco. La collezione Mario Scaglia: placchette. 3 vols. Bergamo, 2011: 1:159, under Prototipo, M.12, as by the Master of the Labors of Hercules.