Roman cavalrymen.
This cavalryman has a hole drilled into his hand for a metal insert that has since been removed. The horse in this scene, as in others, looks too small for the man on its back; the fact that men and horses vary little in size over the frieze suggest that they had established sizes for these. Planning out the frieze in such a way as to ensure that it was internally cohesive would require a certain number of set measurements of this kind.
