40005172, Marlborough, 509, Horatius Cocles defends the bridge. Horatius is on horseback (shield device a bearded head). Six followers with pickaxes, hammers, and spades, work behind him, and he is faced by warriors with shields (head devices), bow, spears, and swords, one falling, two others and a broken spear and helmet in the water. The bridge has five arches., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 509, Cameo, Onyx, Renaissance