XLVII. Having said this, he went away; and Antonius, who was troubled at these words, called together his friends and the Mardian who was their guide, and had exactly the same opinion. For even if there were no enemy, he knew that the want of roads in the plains and the mistakes in the track which they might make there were matters of hazard and difficulty; but he declared that the road over the mountains presented no other risk than the want of water for a single day. Accordingly Antonius turned aside and led his army by this route by night, having given orders to the men to take water with them. But the greater part had no vessels, and accordingly they filled their helmets with water and carried them, and others took it in skins. As soon as Antonius began to advance, the Parthians had intelligence of it, and contrary to their custom they commenced the pursuit while it was still night. Just as the sun was rising, they came up with the rear, which was in weak condition through want of sleep and fatigue: for they had accomplished two hundred and forty stadia in the night; and the enemy coming upon them so suddenly when they did not expect it, dispirited them. The contest increased their thirst, for they still advanced while they were defending themselves. Those who were in the first ranks, as they were marching onwards, came to a river,[420] the water of which was cool and pellucid, but salt and of a medicinal nature; and this water, when drank of immoderately, caused pains with purging and augmentation of the thirst: and though the Mardian had warned them of this, the soldiers nevertheless forced away those who tried to hinder them and drank of the water. Antonius went round to the men and prayed them to hold out for a short time, and he said there was another river not far off, and besides this, the rest of the route was impracticable for horses and rough, so that the enemy must certainly turn back. At the same time he summoned those who were engaged in the fight and gave the signal for pitching the tents, that the soldiers might at least enjoy the shade a little.