The plains bordering the right bank of the Tigris, from the Uknu to the Turnat or the Eadanu, which had belonged to Babylon from the very earliest times, were no doubt still retained by her;* but the mountain district which commanded them certainly remained in the hands of Cyaxares, as well as the greater part of Assyria proper, and there is every reason to believe that from the Eadanu northwards the Tigris formed the boundary between the two allies, as far as the confluence of the Zab.

     * This is what appears to me to follow from the account of
     the conquest oL Babylon by Cyrus, as related by Herodotus.

The entire basin of the Upper Tigris and its Assyrian colonies, Amidi and Tushkan were now comprised in the sphere of Medic influence, and the settlement of the Scythians at Harran, around one of the most venerated of the Semitic sanctuaries, shows to what restrictions the new authority of Chaldasa was subjected, even in the districts of Mesopotamia, which were formerly among the most faithful possessions of Nineveh.  If these barbarians had been isolated, they would not long have defied the King of Babylon, but being akin to the peoples who were subject to Cyaxares, they probably claimed his protection, and regarded themselves as his liege men; it was necessary to treat them with consideration, and tolerate the arrogance of their presence upon the only convenient road which connected the eastern with the western provinces of the kingdom.  It is therefore evident that there was no opening on this side for those ever-recurring struggles in which Assyria had exhausted her best powers; one war was alone possible, that with Media, but it was fraught with such danger that the dictates of prudence demanded that it should be avoided at all costs, even should the alliance between the two courts cease to be cemented by a royal marriage.  However great the confidence which he justly placed in the valour of his Chaldaeans, Nebuchadrezzar could not hide from himself the fact that for two centuries they had always been beaten by the Assyrians, and that therefore he would run too great a risk in provoking hostilities with an army which had got the better of the conquerors of his people.  Besides this, Cyaxares was fully engaged in subjecting the region which he had allotted to himself, and had no special desire to break with his ally.  Nothing is known of his history during the years which followed the downfall of Nineveh, but it is not difficult to guess what were the obstacles he had to surmount, and the result of the efforts which he made to overcome them.  The country which extends between the Caspian and the Black Sea—­the mountain block of Armenia, the basins of the Araxes and the Kur, the valleys of the Halys, the Iris, and the Thermodon, and the forests of the Anti-Taurus and the Taurus itself—­had been thrown into utter confusion by the Cimmerians