Arrangements of Porus.
Ptolemy also says that Alexander in the first place sent the horse-archers against these, and led the cavalry himself, thinking that Porus was approaching with all his forces, and that this body of cavalry was marching in front of the rest of his army, being drawn up by him as the vanguard. But as soon as he had ascertained with accuracy the number of the Indians, he immediately made a rapid charge upon them with the cavalry around him. When they perceived that Alexander himself and the289 body of cavalry around him had made the assault, not in line of battle regularly formed, but by squadrons, they gave way; and 400 of their cavalry, including the son of Porus, fell in the contest. The chariots also were captured, horses and all, being heavy and slow in the retreat, and useless in the action itself on account of the clayey ground. When the horsemen who had escaped from this rout brought news to Porus that Alexander himself had crossed the river with the strongest part of his army, and that his son had been slain in the battle, he nevertheless could not make up his mind what course to take, because the men who had been left behind under Craterus were seen to be attempting to cross the river from the great camp which was directly opposite his position. However, at last he preferred to march against Alexander himself with all his army, and to come into a decisive conflict with the strongest division of the Macedonians, commanded by the king in person. But nevertheless he left a few of the elephants togethe............