40005242, Marlborough, 189, Youthful head conjoined with two Silenos masks which, crested, look like a helmet., Metropolitan Museum of Art, New York, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), 10.131.1, Blood-sard

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