40004869, Marlborough, 283, The centaur Cheiron, animal skin over his shoulders, holds Achilles who stands with a lyre; a tree behind. Ground line., Walters Art Museum, Baltimore, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), 42.1161, Red jasper, 2nd/1st cent. BC.