The fleet being ready, Alexander, with some chosen soldiers of his guard, embarked and sailed towards Tyre, in order of battle. He himself was on the extremity of the right wing, which extended towards the main ocean, accompanied by the kings of Cyprus and Phœnicia; the left was commanded by Craterus. The Tyrians were at first inclined to give battle, but on beholding the strength of the Grecian line, they thought it best to keep their fleet in port and endeavour to prevent the enemy from entering. When Alexander saw this, he advanced nearer the city, and, finding it impossible to force the port towards Sidon, on account of the narrowness of the entrance and the number of galleys there posted with their prows turned towards the main ocean, he only sunk three of them which lay without, and afterwards came to an anchor with his whole fleet pretty near the mole, where his ships rode in safety. While all these things were going on, the construction of the mole was prosecuted with great vigour. The workmen threw in whole trees, with all their branches on them, and laid great stones over them; upon these they placed other trees, covering the latter with a kind of unctuous earth, which served instead of mortar. Heaping more trees and stones upon these in the same manner, the whole formed one entire body. This causeway was made wider than the former, so that the towers which were built in the middle would be out of the reach of the darts and arrows discharged by the boats from the sides. The besieged, on the other hand, did all in their power to stop the progress of the work. But nothing was more useful to them than the operations of their divers, who, swimming under water, came unperceived quite up to the bank, and with hooks, drew such branches to them as projected beyond the work, and pulling forward with great strength, forced away everything that was over them. But, notwithstanding all obstacles, the Macedonian perseverance prevailed, and the dyke was brought to perfection. Military engines of all kinds were placed upon the causeway, in order to shake the walls; and showers of darts, arrows, stones, and burning torches were poured upon the besieged.