Foremost to do him homage is the kneeling figure of a chieftain, probably Valerian, behind whom are arranged in a double line seventeen persons, representing apparently the different corps of the Roman army.

[PLATE XIV.] All these persons are on foot, while in contrast with them are arranged behind Sapor ten guards on horseback, who represent his irresistible cavalry.

Another bas-relief at the same place gives us a general view of the triumph of Sapor on his return to Persia with his illustrious prisoner.

Here fifty-seven guards are ranged behind him, while in front are thirty-three tribute-bearers, having with them an elephant and a chariot.

In the centre is a group of seven figures, comprising Sapor, who is on horseback in his usual costume; Valerian, who is under the horse's feet; Miriades, who stands by Sapor's side; three principal tribute-bearers in front of the main figure; and a Victory which floats in the sky.
[Illustration: PLATE 14.] Another important work, assigned by tradition to Sapor I., is the great dyke at Shuster.