They also say that about the same time Amyntas, son of Andromenes, was brought to trial, together with his brothers Polemo, Attalus, and Simmias, on the charge of being accessory to the conspiracy against Alexander, on account of their trust in Philotas and their intimate friendship with him. The belief in their participation in the plot was strengthened among the mass of men by the fact that when Philotas was arrested, Polemo, one of the brothers of Amyntas, fled to the enemy. But Amyntas with his other two brothers stayed to await the trial, and defended himself so vigorously among the Macedonians that he was declared innocent of the charge. As soon as he was acquitted in the assembly, he demanded that permission should be given him to go to his brother and bring him back to Alexander. To this the Macedonians acceded; so he went away and on the same day brought Polemo back. On this account he now seemed free from guilt much more than before. But soon after, as he was besieging a certain village, he was shot with an arrow and died of the wound; so that he derived no other advantage from his acquittal except that of dying with an unsullied reputation.[490] Alexander appointed two commanders over the Companion cavalry, Hephaestion, son of Amyntor, and Clitus, son of Dropidas, dividing the brigade of the Companions into two parts, because he did not wish any one of his friends to have the sole command of so many horsemen, especially as they were the best of all his cavalry, both in public estimation and in martial discipline.[491] He now arrived in the land of the people formerly called Ariaspians, but afterwards named Euergetae, because they assisted Cyrus, son of Cambyses, in his invasion of Scythia.[492] Alexander treated these people, whose ancestors had been serviceable to Cyrus, with honour; and when he ascertained that the men not only enjoyed a form of government unlike that of the other barbarians in that part of the world, but laid claim to justice equally with the best of the Greeks, he set them free, and gave them besides as much of the adjacent country as they asked for themselves; but they did not ask for much. Here he offered sacrifice to Apollo, and arrested Demetrius, one of his confidential body-guards, on suspicion of having been implicated with Philotas in the conspiracy. Ptolemy, son of Lagus, was appointed to the post vacated by Demetrius. CHAPTER XXVIII. ALEXANDER CROSSES THE HINDU-KOOSH.