He now set out from the rock and invaded the land of the Assacenians; for he was informed that the brother of Assacenus, with his elephants and many of the neighbouring barbarians had fled into the mountains in this district. When he arrived at the city of Dyrta,[618] he found none of the inhabitants either in it or in the land adjacent. On the following day he sent out Nearchus and Antiochus, the colonels of the shield-bearing guards, giving the former the command of the Agrianians and the light-armed troops,[619] and the latter the command of his own regiments and two others besides. They were despatched both to reconnoitre the locality and to try if they could capture some of the barbarians anywhere in order to get information about the general affairs of the country; and he was especially anxious to learn news of the elephants. He now directed his march towards the river Indus,[620] the army going in advance to make a road for him, as otherwise this district would have been impassable. Here he captured a few of the barbarians, from whom he learnt that the Indians of that land had fled for safety to Abisares, but that they had left their elephants there to pasture near the river Indus. He ordered these men to show him the way to the elephants. Many of the Indians are elephant-hunters, and these Alexander kept in attendance upon him in high honour, going out to hunt the elephants in company with them. Two of these animals perished in the chase, by leaping down a precipice, but the rest were caught and being ridden by drivers were marshalled with the army. He also as he was marching along the river lighted upon a wood the timber of which was suitable for building ships; this was cut down by the army, and ships were built for him, which were brought down the river Indus to the bridge, which had long since been constructed by Hephaestion and Perdiccas at his command. BOOK V. CHAPTER I. ALEXANDER AT NYSA.