It may be added that Oriental monarchs, when they are cruel, do not show themselves ashamed of their cruelties, but usually relate them openly in their inscriptions, or represent them in their bas-reliefs. The remains ascribed on good grounds to Sapor do not, however, contain anything confirmatory of the stories which we are considering. Valerian is represented on them in a humble attitude, but not fettered, and never in the posture of extreme degradation commonly associated with his name. He bends his knee, as no doubt he would be required to do, on being brought into the Great King’s presence; but otherwise he does not appear to be subjected to any indignity. It seems thus to be on the whole most probable that the Roman emperor was not more severely treated than the generalty of captive princes, and that Sapor has been unjustly taxed with abusing the rights of conquest. The hostile feeling of Odenathus against Sapor did not cease with the retreat of the latter across the Euphrates. The Palmyrene prince was bent on taking advantage of the general confusion of the times to carve out for himself a considerable kingdom, of which Palmyra should be the capital. Syria and Palestine on the one hand, Mesopotamia on the other, were the provinces that lay most conveniently near to him, and that he especially coveted. But Mesopotamia had remained in the possession of the Persians as the prize of their victory over Valerian, and could only be obtained by wresting it from the hands into which it had fallen. Odenathus did not shrink from this contest. It had been with some reason conjectured that Sapor must have been at this time occupied with troubles which had broken out on the eastern side of his empire. At any rate, it appears that Odenathus, after a short contest with Macriarius and his son, Quietus, turned his arms once more, about A.D. 263, against the Persians, crossed the Euphrates into Mesopotamia, took Oarrhee and Nisibis, defeated Sapor and some of his sons in a battle, and drove the entire Persian host in confusion to the gates of Ctesiphon. He even ventured to form the siege of that city; but it was not long before effectual relief arrived; from all the provinces flocked in contingents for the defence of the Western capital; several engagements were fought, in some of which Odenathus was defeated; and at last he found himself involved in difficulties through his ignorance of the localities, and so thought it best to retire. Apparently his retreat was undisturbed; he succeeded in carrying off his booty and his prisoners, among whom were several satraps, and he retained possession of Mesopotamia, which continued to form a part of the Palmyrene kingdom until the capture of Zenobia by Aurelian (A.D. 273).