The Twitter Herodotus

7.211 Next Xerxes sent his Immortals against the Greeks, but they fared no better than the Medes. The Spartans fought especially well.

7.212 The Persians did no better on day 2 and withdrew. The Greeks--except the Phocians--fought by nation, in turns, & were still fresh. 

7.213 Xerxes didn't know what to do, but a local named Ephialtes, wanting $$$, told him about a path that led over the mtn to Thermopylae.

7.214 Some say it was Onetes & Corydallus who told Xerxes, but I don't agree. The Greeks later put a price on Ephialtes' head, not theirs.

7.215 Xerxes was pleased with Ephialtes' information. He immediately sent Hydarnes and his men off along the path.

7.216 The path is called the Anopaea. It begins at the Asopus River and extends along the mountain, ending at the city of Alpenus.

7.217 The Persians marched along the path all night. At dawn they reached the summit, where 1000 Phocians had been stationed to keep watch.

7.218 The Phocians fled to the mtn top, thinking the Persians would pursue them, but the Persians bypassed them and continued on the path.

7.219 The Greeks in the pass heard from lookouts that the Persians were coming along the path. Some of them fled. Others prepared to fight.

7.220 But some say--and I believe this--that Leonidas sent the allies away. Meanwhile, he and his Spartiates refused to quit their post.