After reducing Sogdiana, Alexander returned into Bactria in 327, and began to prepare far his projected expedition into India. While he was thus employed a plot was formed against his life by the royal pages, incited by Hermolaus, one of their number, who had been punished with stripes for anticipating the king during a hunting party in slaying a wild boar. Hermolaus and his associates, among whom was Callisthenes, a pupil of Aristotle, were first tortured, and then put to death. It seems certain that a conspiracy existed; but no less certain that the growing pride and haughtiness of Alexander were gradually alienating from him the hearts of his followers. Alexander did not leave Bactria till late in the spring. He crossed the Indus by a bridge of boats near Taxila, the present ATTOCK, where the river is about 1000 feet broad, and very deep. He now found himself in the district at present called the PENJ-AB (or the FIVE RIVERS). Taxiles, the sovereign of the district, at once surrendered Taxila, his capital and joined the Macedonian force with 5000 men. Hence Alexander proceeded with little resistance to the river Haydaspes (BEHUT or JELUM). On the opposite bank, Porus, a powerful Indian king, prepared to dispute his progress with a numerous and well-appointed force. Alexander, however, by a skilful stratagem conveyed his army safely across the river. An obstinate battle then ensued. In the army of Porus were many elephants, the sight and smell of which frightened the horses of Alexander's cavalry. But these unwieldy animals ultimately proved as dangerous to the Indians as to the Greeks; for when driven into a narrow space they became unmanageable, and created great confusion in the ranks of Porus. By a few vigorous charges the Indians were completely routed, with the loss of 12,000 slain and 9000 prisoners. Among the latter was Porus himself, who was conducted into the presence of Alexander. The courage which he had displayed in the battle had excited the admiration of the Macedonian king. Mounted on an enormous elephant, he retreated leisurely when the day was lost, and long rejected every summons to surrender; till at length, overcome by thirst and fatigue, he permitted himself to be taken. Even in this situation Porus still retained his majestic bearing, the effect of which was increased by the extraordinary height of his stature. On Alexander's inquiring how he wished to be treated, he replied, "Like a king." "And have you no other request?" asked Alexander. "No," answered Porus; "everything is comprehended in the word king." Struck by his magnanimity, Alexander not only restored him to his dominions, but also considerably enlarged them; seeking by these means to retain him as an obedient and faithful vassal.