Alexander had no sooner entered India than the chiefs of various tribes came to meet him with proffers of service. He was, they said, the third descendant of Jupiter who had visited their country, and that while Father Bacchus and Hercules were known to them merely by tradition, him they saw present before their eyes. To these he accorded a gracious reception, and intending to employ them as his guides, he bade them to accompany him. But when no more chiefs came to surrender, he despatched Hephaestion and Perdiccas in advance with a part of his army to reduce whatever tribes declined his authority. He ordered them to proceed to the Indus and build boats for transporting the army to the other side of that river. Since many rivers would have to be crossed, they so constructed the vessels that, after being taken to pieces, the sections could be conveyed in waggons, and be again pieced together. He himself, leaving Craterus to follow with the infantry, pressed forward with the cavalry and light troops, and falling in with the enemy easily routed them, and chased them into the nearest city. Craterus had now rejoined him, and the king, wishing to strike terror into this people, who had not yet proved the Macedonian arms, gave previous orders that when the fortifications of the city under siege had been burned, not a soul was to be left alive. Now, in riding up to the walls he was wounded by an arrow, but he captured the place, and having massacred all the inhabitants, vented his rage even upon the buildings.[228] Having conquered this obscure tribe, he moved thence towards the city of Nysa. The camp, it so happened, was pitched under the walls on woody ground, and as the cold at night was more piercing than had ever before been felt, it made the soldiers shiver. But they were fortunate enough to have at hand the means of making a fire, for felling the copses they kindled a flame, and fed it with faggots, so that it seized the tombs of the citizens, which, being made of old cedar wood, spread the fire they had caught in all directions till every tomb was burned down. The barking of dogs was now heard from the town, followed by the clamour of human voices _from the camp_. Thus the citizens discovered that the enemy had arrived, and the Macedonians that they were close to the city. The king had now drawn out his forces and was assaulting the walls, when some of the defenders risked an engagement. These were, however, overpowered with darts, so that dissensions broke out among the Nysaeans, some advising submission, but others the trial of a battle. Alexander, on discovering that their opinions were divided, instituted a close blockade, but forbade further bloodshed.