When, then, the Arabian had made the pledge to the messengers who had come from Cambyses, he devised the following expedient: he filled camel-skins with water and loaded all his camels with these; then he drove them into the waterless land and there awaited Cambyses' army. This is the most credible of the stories told; but I must relate the less credible tale also, since they tell it. There is a great river in Arabia called Corys, emptying into the sea called Red. From this river (it is said) the king of the Arabians brought water by an aqueduct made of sewn oxhides and other hides and extensive enough to reach to the dry country; and he had great tanks dug in that country to try to receive and keep the water. It is a twelve days' journey from the river to that desert. By three aqueducts (they say) he brought the water to three different places.