40004779, Marlborough, 653, Hygieia seated on a low column, dress around neck and legs, holding a patera. Before her a low column with the snake wound round it, bearing a tripod. 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. 653, Cornelian

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