40004838, Marlborough, 496, Hercules strangling the lion. Below them the lion?s cave and the heads of a lion (lioness?) and a cub(?) within it, a tree behind., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 496, Cameo, Onyx