Soon after this, arrived envoys from the king of the Scythians, who were sent to apologize for what had been done, and to state that it was not the act of the Scythian State, but of certain men who set out for plunder after the manner of freebooters. They also assured him that their king was willing to obey the commands laid upon him. Alexander sent to him a courteous reply, because it did not seem honourable for him to abstain from marching against him if he distrusted him, and at that time there was not an convenient opportunity to do so. The Macedonians who were garrisoning the citadel at Maracanda, when an assault was made upon it by Spitamenes and his adherents, sallied forth, and killing some of the enemy and repulsing all the rest, retreated into the citadel without any loss. But when Spitamenes was informed that the men despatched by Alexander to Maracanda were now drawing near, he raised the siege of the citadel, and retired to the capital of Sogdiana.[521] Pharnuches and the generals with him, being eager to drive him out altogether, followed him up as he was retreating towards the frontiers of Sogdiana, and without due consideration made a joint attack upon the Nomad Scythians. Then Spitamenes, having received a reinforcement of 600 Scythian horsemen, was further emboldened by the Scythian alliance to wait and receive the Macedonians who were advancing upon him. Posting his men in a level place near the Scythian desert, he was not willing either to wait for the enemy or to attack them himself; but rode round and discharged arrows at the phalanx of infantry. When the forces of Pharnuches made a charge upon them, they easily escaped, since at that time their horses were swifter and more vigorous, while the horse of Andromachus had been damaged by the incessant marching, as well as by lack of fodder; and the Scythians pressed upon them with all their might whether they halted or retreated. Many of them then were wounded by the arrows, and some were killed. They therefore arranged the soldiers into the form of a square and proceeded to the river Polytimetus,[522] because there was a woody glen near it, and it would consequently no longer be easy for the barbarians to shoot arrows at them, and their infantry would be more useful to them. But Caranus, the commander of the cavalry, without communicating with Andromachus, attempted to cross the river in order to put the cavalry in a place of safety on the other side. The infantry followed him without any word of command; their descent into the river being made in a panic and without any discipline down the precipitous banks. When the barbarians perceived the error of the Macedonians, they sprang into the ford here and there, horses and all. Some of them seized and held tight those who had already crossed and were departing; others being posted right in front of those who were crossing, rolled them over into the river; others shot arrows at them from the flanks;