After this convoy was first sent on its way, the advance guard of the Scythians found the Persians about a three days' march distant from the Ister; and having found them they camped a day's march ahead of the enemy and set about scorching the earth of all living things. When the Persians saw the Scythian cavalry appear, they marched on its track, the horsemen always withdrawing before them; and then, making for the one Scythian division, the Persians held on in pursuit toward the east and the Tanaïs river; when the horsemen crossed this, the Persians crossed also, and pursued until they had marched through the land of the Sauromatae to the land of the Budini.