40005015, Marlborough, 52, Portrait (profile left): Augustus. Bust of Augustus, three-quarter back view, laurel-crowned, with spear and aegis with gorgoneion., 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), 42.11.30, Cameo, Sardonyx, Late 1st cent. BC.