8. In the mean time Tissaphernes arrived, with his army, as if with the view of returning home; and Orontes came with his army. Orontes also brought[98] with him the king's daughter, whom he had received in marriage.[99] 9. From hence they now proceeded on their march, Tissaphernes being their guide, and securing them opportunities of buying provisions; Ariæus also, with the Barbarian troops of Cyrus, marched in company with Tissaphernes and Orontes, and encamped in common with them. 10. But the Greeks, conceiving a suspicion of these men, began to march by themselves, taking guides of their own; and they always encamped at the distance of a parasang, or little less, from each other; and both parties kept on their guard against one another, as if they had been enemies, and this consequently increased their mistrustful feelings. 11. More than once, too, as they were gathering fuel, or collecting grass and other such things, in the same quarter, they came to blows with each other;[100] and this was an additional source of animosity between them. 12. After marching three days, they arrived at the wall of Media,[101] as it is called, and passed to the other side of it. This wall was built of burnt bricks, laid in bitumen; it was twenty feet in thickness, and a hundred in height, and the length of it was said to be twenty parasangs; and it was not far distant from Babylon. 13. Hence they proceeded, in two days' march, the distance of eight parasangs; crossing two canals, the one by a permanent bridge, the other by a temporary one formed of seven boats. These canals were supplied from the river Tigris; and from one to the other of them were cut ditches across the country, the first of considerable size, and the next smaller; and at last diminutive drains, such as are cut in Greece through the panic[102] fields. They then arrived at the Tigris; near which there was a large and populous city, called Sitace, distant from the banks of the river only fifteen stadia. 14. In the neighbourhood of this city the Greeks encamped, close to an extensive and beautiful park, thickly planted with all kinds of trees. The Barbarians, though they had but just crossed the Tigris, were no longer in sight.