As Alexander advanced southwards, all the towns of Phoenicia hastened to open their gates; the inhabitants of Sidon even hailed him as their deliverer. Tyre, also, sent to tender her submission; but coupled with reservations by no means acceptable to a youthful conqueror in the full tide of success. Alexander affected to receive their offer as an unconditional surrender, and told them that he would visit their city and offer sacrifices to Melcart, a Tyrian deity, who was considered as identical with the Grecian Hercules. This brought the matter to an issue. The Tyrians now informed him that they could not admit any foreigners within their walls, and that, if he wished to sacrifice to Melcart, he would find another and more ancient shrine in Old Tyre, on the mainland. Alexander indignantly dismissed the Tyrian ambassadors, and announced his intention of laying siege to their city. The Tyrians probably deemed it impregnable. It was by nature a place of great strength, and had been rendered still stronger by art. The island on which it stood was half a mile distant from the mainland; and though the channel was shallow near the coast, it deepened to three fathoms near the island. The shores of the island were rocky and precipitous, and the walls rose from the cliffs to the height of 150 feet in solid masonry. As Alexander possessed no ships, the only method by which he could approach the town was by constructing a causeway, the materials for which were collected from the forests of Libanus and the ruins of Old Tyre. After overcoming many difficulties the mole was at length pushed to the foot of the walls; and as soon as Alexander had effected a practicable breach, he ordered a general assault both by land and sea. The breach was stormed under the immediate inspection of Alexander himself; and though the Tyrians made a desperate resistance, they were at length overpowered, when the city became one wide scene of indiscriminate carnage and plunder. The siege had lasted seven months, and the Macedonians were so exasperated by the difficulties and dangers they had undergone that they granted no quarter. Eight thousand of the citizens are said to have been massacred; and the remainder, with the exception of the king and some of the principal men, who had taken refuge in the temple of Melcart, were sold into slavery to the number of 30,000. Tyre was taken in the month of July in 332.