7.211.1
When the Medes had been roughly handled, they retired, and the Persians whom the king called Immortals, led by Hydarnes, attacked in turn. It was thought that they would easily accomplish the task.
7.211.2
When they joined battle with the Hellenes, they fared neither better nor worse than the Median army, since they used shorter spears than the Hellenes and could not use their numbers fighting in a narrow space.
7.211.3
The Lacedaemonians fought memorably, showing themselves skilled fighters amidst unskilled on many occasions, as when they would turn their backs and feign flight. The barbarians would see them fleeing and give chase with shouting and noise, but when the Lacedaemonians were overtaken, they would turn to face the barbarians and overthrow innumerable Persians. A few of the Spartans themselves were also slain. When the Persians could gain no inch of the pass, attacking by companies and in every other fashion, they withdrew.
ch. 212
7.212.1
It is said that during these assaults in the battle the king, as he watched, jumped up three times from the throne in fear for his army. This, then, is how the fighting progressed, and on the next day the barbarians fought no better. They joined battle supposing that their enemies, being so few, were now disabled by wounds and could no longer resist.
7.212.2
The Hellenes, however, stood ordered in ranks by nation, and each of them fought in turn, except the Phocians, who were posted on the mountain to guard the path. note When the Persians found nothing different from what they saw the day before, they withdrew.
ch. 213
7.213.1
The king was at a loss as to how to deal with the present difficulty. Epialtes son of Eurydemus, a Malian, thinking he would get a great reward from the king, came to speak with him and told him of the path leading over the mountain to Thermopylae. In so doing he caused the destruction of the Hellenes remaining there.
7.213.2
Later he fled into Thessaly in fear of the Lacedaemonians, and while he was in exile, a price was put on his head by the Pylagori note when the Amphictyons assembled at Pylae. Still later he returned from exile to Anticyra and was killed by Athenades, a Trachinian.
7.213.3
Athenades slew Epialtes for a different reason, which I will tell later in my history, note but he was given no less honor by the Lacedaemonians. It was in this way, then, that Epialtes was later killed.
ch. 214
7.214.1
There is another story told, namely that Onetes son of Phanagoras, a Carystian, and Corydallus of Anticyra are the ones who gave the king this information and guided the Persians around the mountain, but I find it totally incredible.
7.214.2
One must judge by the fact that the Pylagori set a price not on Onetes and Corydallus but on Epialtes the Trachinian, and I suppose they had exact knowledge; furthermore, we know that Epialtes was banished on this charge.
7.214.3
Onetes might have known the path, although he was not a Malian, if he had often come to that country, but Epialtes was the one who guided them along the path around the mountain. It is he whom I put on record as guilty.
ch. 215
7.215.1
Xerxes was pleased by what Epialtes promised to accomplish. He immediately became overjoyed and sent out Hydarnes and the men under Hydarnes command, who set forth from the camp at about lamp-lighting time. This path note had been discovered by the native Malians, who used it to guide the Thessalians into Phocis when the Phocians had fenced off the pass with a wall and were sheltered from the war. So long ago the Malians had discovered that the pass was in no way a good thing. note
