Being masters, then, of a territory of proportions worthy of a kingdom, his great power had made Molon from the first a formidable enemy: but when the royal generals appeared to have abandoned the country to him, and his own forces were elated at the successful issue of their first hopes, the terror which he inspired became absolute, and he was believed by the Asiatics to be irresistible. Taking advantage of this, he first of all resolved to cross the Tigris and lay siege to Seleucia; but when his passage across the river was stopped by Zeuxis seizing the river boats, he retired to the camp at Ctesiphon, and set about preparing winter quarters for his army. When King Antiochus heard of Molon’s advance and the retreat of his own generals, he was once more for giving up the expedition against Ptolemy, and going in person on the campaign against Molon, and not letting slip the proper time for action. But Hermeias persisted in his original plan, and despatched the Achaean Xenoetas against Molon, in command of an army, with full powers; asserting that against rebels it was fitting that generals should have the command; but that the king ought to confine himself to directing plans and conducting national wars against monarchs. Having therefore the young king entirely in his power, owing to his age, he set out; and having mustered the army at Apameia he started thence and arrived at Laodiceia. Advancing from that time with his whole army, the king crossed the desert and entered the cañon called Marsyas, which lies between the skirts of Libanus and Anti-Libanus, and is contracted into a narrow gorge by those two mountains. Just where the valley is narrowest it is divided by marshes and lakes, from which the scented reed is cut.