40004626, Marlborough, 361, Head of Medusa in high relief., Liverpool National Museums, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 361, Cameo, Translucent chalcedony

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