trees and the herb called silphium, on which the flocks and herds of the mountaineers pastured. This march, which terminated at Adrapsa, occupied fifteen days. The Macedonians had now reached a fertile country; but as Bessos had ordered it to be ravaged, they found a wide barrier of desolation opposed to their further advance. The barrier was interposed in vain. Alexander resolutely pressed forward, and Bessos and his associates fled at his approach, and, crossing the Oxus, retired into Sogdiana. Aornos and Baktra, the two principal cities of the Baktrian satrapy, surrendered without resistance, and the satrapy itself was soon afterwards reduced. At Baktra Erigyios, who had succeeded in quelling the Areian revolt, rejoined the army. Alexander having appointed Artabazos satrap of his new conquest, marched to the Oxus in pursuit of Bessos, and came upon that river at the point where Kijil now stands. There it was about three-quarters of a mile in breadth, and the current was found to be both deep and rapid. The passage, which occupied five days, was made on floats, supported by skins stuffed with straw, and rendered watertight. The army had no sooner gained the right bank than messengers arrived from two of the leading adherents of Bessos—Spitamenes, the satrap of Sogdiana, and Dataphernes—promising to surrender Bessos, who was already their prisoner, if Alexander would send a small force to their support. The king assented, and sent Ptolemy forward to receive the traitor from their hands. They gave him up, and he was conducted with a rope round his neck into the presence of the king, who ordered him to be scourged and then conveyed to Zariaspa (which some identify with Baktra), there to await his final doom.