130. So the guides, when Xerxes asked whether there was any other possible outlet to the sea for the Peneios, said with exact knowledge of the truth: "O king, for this river there is no other outgoing which extends to the sea, but this alone; for all Thessaly is circled about with mountains as with a crown." To this Xerxes is said to have replied: "The Thessalians then are prudent men. This it appears was that which they desired to guard against in good time 111 when they changed their counsel, 112 reflecting on this especially besides other things, namely that they had a country which, it appears, is easy to conquer and may quickly be taken: for it would have been necessary only to let the river flow over their land by making an embankment to keep it from going through the narrow channel and so diverting the course by which now it flows, in order to put all Thessaly under water except the mountains." This he said in reference to the sons of Aleuas, because they, being Thessalians, were the first of the Hellenes who gave themselves over to the king; for Xerxes thought that they offered him friendship on behalf of their whole nation. Having said thus and having looked at the place, he sailed back to Therma. 131. He then was staying in the region of Pieria many days, for the road over the mountains of Macedonia was being cut meanwhile by a third part of his army, that all the host might pass over by this way into the land of the Perraibians: and now the heralds returned who had been sent to Hellas to demand the gift of earth, some empty-handed and others bearing earth and water. 132. And among those who gave that which was demanded were the following, namely the Thessalians, Dolopians, Enianians, 113 Perraibians, Locrians, Megnesians, Malians, Achaians of Phthiotis, and Thebans, with the rest of the Boeotians also excepting the Thespians and Plataians. Against these the Hellenes who took up war with the Barbarian made an oath; and the oath was this,--that whosoever being Hellenes had given themselves over to the Persian, not being compelled, these, if their own affairs should come to a good conclusion, they would dedicate as an offering 114 to the god at Delphi. 133. Thus ran the oath which was taken by the Hellenes: Xerxes however had not sent to Athens or to Sparta heralds to demand the gift of earth, and for this reason, namely because at the former time when Dareios had sent for this very purpose, the one people threw the men who made the demand into the pit 115 and the others into a well, and bade them take from thence earth and water and bear them to the king. For this reason Xerxes did not send men to make this demand. And what evil thing 116 came upon the Athenians for having done this to the heralds, I am not able to say, except indeed that their land and city were laid waste; but I do not think that this happened for that cause: