40004907, Marlborough, 298, Portrait (profile left): Brutus. Marcus Junius Brutus., 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), 21.88.48, Cornelian

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