40004977, Marlborough, 72, Portrait (profile right): Julio-Claudian (?). Head of a youth., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 72, Cameo, Sardonyx

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