Siege of Aornus. At this juncture some of the natives came to him, and surrendering themselves, offered to lead him to the part of the rock where it could be most easily assailed, and from which it would be easy for him to capture the place. With these he sent Ptolemy, son of Lagus, the confidential body-guard, in command of the Agrianians and the other light-armed troops, together with picked men from the shield-bearing guards. He gave this officer instructions, as soon as he had got possession of the place, to occupy it with a strong guard, and signal to him that it was held. Ptolemy proceeded along a road which was rough and difficult to pass, and occupied the position without the knowledge of the barbarians. After strengthening his position with a stockade and a ditch all round, he raised a beacon from the mountain, whence it was likely to be seen by Alexander. The flame was at once seen, and on the following day the king led his army forward; but as the barbarians disputed his advance, he could do nothing further on account of the difficult nature of the ground. When the barbarians perceived that Alexander could not make an assault, they turned round and attacked Ptolemy, and a sharp battle ensued between them and the Macedonians, the Indians making great efforts to demolish the stockade, and Ptolemy to preserve his position. But the barbarians, getting the worst of it in the skirmish, withdrew as the night came on. Alexander now selected from the Indian deserters a man who was not only devoted to him but acquainted with the locality,617 and sent him by night to Ptolemy, carrying a letter, in which it was written that as soon as the king attacked the rock, 261Ptolemy was to come down the mountain upon the barbarians, and not be ............