Some men thereupon who belonged to the neighbourhood came to him, and after proffering their submission undertook to guide him to the most assailable part of the rock, that from which it would not be difficult to capture the place. With these men he sent Ptolemy, the son of Lagos, a member of the bodyguard, leading the Agrianians and the other light-armed troops and the selected hypaspists, and directed him, on securing the position, to hold it with a strong guard and to signal to him when he had occupied it. Ptolemy, who followed a route which proved rough and otherwise difficult to traverse, succeeded in occupying the position without being perceived by the barbarians.[59] The whole circuit of this he fortified with a palisade and a trench, and then raised a beacon on the mountain from which the flame was likely to be seen by Alexander. Alexander did see it, and next day moved forward with his army, but as the barbarians obstructed his progress he could do nothing more on account of the difficult nature of the ground. When the barbarians perceived that Alexander had found an attack to be impracticable, they turned round, and in full force fell upon Ptolemy’s men. Between these and the Macedonians hard fighting ensued, the Indians making strenuous efforts to destroy the palisade by tearing up the stakes, and Ptolemy to guard and maintain his position. The barbarians were worsted in the skirmish and when night began to fall withdrew. From the Indian deserters Alexander selected one who knew the country and could otherwise be trusted, and sent him by night to Ptolemy with a letter importing that when he himself assailed the rock, Ptolemy should no longer content himself with defending his position but should fall upon the barbarians on the mountain, so that the Indians, being attacked in front and rear, might be perplexed how to act. Alexander, starting at daybreak from his camp, led his army by the route followed by Ptolemy when he went up unobserved, being convinced that if he forced a passage that way, and effected a junction with Ptolemy’s men, the work still before him would not then be difficult; and so it turned out; for up to mid-day there continued to be hard fighting between the Indians and the Macedonians—the latter forcing their way up the ascent, while the former plied them with missiles as they ascended. But as the Macedonians did not slacken their efforts, ascending the one after the other, while those in advance paused to rest, they gained with much pain and toil the summit of the pass early in the afternoon, and joined Ptolemy’s men. His troops being now all united, Alexander put them again in motion and led them against the rock itself; but to get close up to it was not yet practicable. So came this day to its end.