The Anabasis of Alexander/Book IV/Chapter XXI
When Alexander had finished his operations among the Sogdianians, and was now in possession of the rock, he advanced into the land of the Paraetacians, because many of the barbarians were said to be holding another rock, a strongly fortified place in that country. This was called the rock of Chorienes; and to it Chorienes himself and many other chiefs had fled for refuge. The height of this rock was about twenty stades, and the circuit about sixty. It was precipitous on all sides, and there was only one ascent to it, which was narrow and not easy to mount, since it had been constructed in spite of the nature of the place. It was therefore difficult to ascend even by men in single file and when no one barred the way. A deep ravine also enclosed[1] the rock all round, so that whoever intended to lead an army up to it, must long before make a causeway of earth over this ravine in order that he might start from level ground, when he led his troops to the assault. Notwithstanding all this, Alexander undertook the enterprise. To so great a pitch of audacity had he advanced through his career of success, that he thought every place ought to be accessible to him,[2] and to be captured by him. He cut down the pines, which were very abundant and lofty all round the mountain, and made ladders of them, so that by means of them the soldiers might be able to descend into the ravine[3]; for otherwise it was impossible for them to do so. During the day-time he himself superintended the work, keeping half of his army engaged in it; and during the night his confidential body-guards, Perdiccas, Leonnatus, and Ptolemy, son of Lagus, in turn with the other half of the army divided into three parts, performed the duty which had been assigned to each for the night. But they could complete no more than twenty cubits in a day, and not quite so much in a night, though the whole army engaged in the labour; so difficult was the place to approach and so hard was the work in it. Descending into the ravine, they fastened pegs into the sharpest and narrowest part of it, distant from each other as far as was consistent with strength to support the weight of what was placed upon them. Upon these they placed hurdles made of willow and osiers, very much in the form of a bridge. Binding these together, they loaded earth above them, so that there might be an approach to the rock for the army on level ground. At first the barbarians derided, as if the attempt was altogether abortive; but when the arrows began to reach the rock, and they were unable to drive back the Macedonians, though they themselves were on a higher level, because the former had constructed screens to ward off the missiles, that they might carry on their labour under them without receiving injury, Chorienes grew alarmed at what was being done, and sent a herald to Alexander, beseeching him to send Oxyartes up to him. Alexander accordingly sent Oxyartes, who on his arrival persuaded Chorienes to entrust himself and the place to Alexander; for he told him that there was nothing which Alexander and his army could not take by storm; and as he himself had entered into an alliance of fidelity and friendship with him, he commended the king's honour and justice in high terms, adducing other examples, and above all his own case for the confirmation of his arguments. By these representations Chorienes was persuaded and came himself to Alexander, accompanied by some of his relations and companions. When he arrived, the king gave him a courteous answer to his inquiries, and retained him after pledging his fidelity and friendship. But he bade him send to the rock some of those who came down with him to order his men to surrender the place; and it was surrendered by those who had fled to it for refuge. Alexander therefore took 500 of his shield-bearing guards and went up to get a view of the rock; and was so far from inflicting any harsh treatment upon Chorienes that he entrusted that very place to him again, and made him governor of all that he had ruled before. It happened that the army suffered much hardship from the severity of the winter, a great quantity of snow having fallen during the siege; while at the same time the men were reduced to great straits from lack of provisions. But Chorienes said he would give the army food for two months; and he gave the men in every tent corn, wine, and salted meat out of the stores in the rock. When he had given them this, he said he had not exhausted even the tenth part of what had been laid up for the siege. Hence Alexander held him in still greater honour, inasmuch as he had surrendered the rock, not so much from compulsion as from his own inclination..
CHAPTER XΧΙ.
Capture of the Rock of Chorienes.