One of the prisoners is forced to guide them to an eminence, from which they dislodge the Carduchi. But they are still harassed, and the rear suffers severely.The Greeks arrive at the river Centrites, which divides the Carduchi from Armenia. They see the Persians drawn up on the opposite bank, while the Carduchi threaten their rear. They are encouraged by a dream of Xenophon's to try a ford, and effect a safe passage across the stream.CHAPTER III.