40004632, Marlborough, 30, Perseus, naked with a cloak round his shoulders, winged sandals, holds up the head of Medusa which he views in a shield at his feet. A pillar behind. Ground line., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 30, Cameo, Sardonyx