7.128.1
When Xerxes saw from Therma the very great height of the Thessalian mountains Olympus and Ossa and learned that the Peneus flows through them in a narrow pass, which was the way that led into Thessaly, he desired to view the mouth of the Peneus because he intended to march by the upper road through the highland people of Macedonia to the country of the Perrhaebi and the town of Gonnus; note this, it was told him, was the safest way.
7.128.2
He did exactly as he desired. He embarked on a Sidonian ship which he always used when he had some such business in hand, and hoisted his signal for the rest also to put out to sea, leaving his land army where it was. Great wonder took him when he came and viewed the mouth of the Peneus, and calling his guides, he asked them if it were possible to turn the river from its course and lead it into the sea by another way.
ch. 129
7.129.1
Thessaly, as tradition has it, was in old times a lake enclosed all round by high mountains. On its eastern side it is fenced in by the joining of the lower parts of the mountains Pelion and Ossa, to the north by Olympus, to the west by Pindus, towards the south and the southerly wind by Othrys. In the middle, then, of this ring of mountains, lies the vale of Thessaly.
7.129.2
A number of rivers pour into this vale, the most notable of which are Peneus, Apidanus, Onochonus, Enipeus, Pamisus. These five, while they flow towards their meeting place from the mountains which surround Thessaly, have their several names, until their waters all unite and issue into the sea by one narrow passage.
7.129.3
As soon as they are united, the name of the Peneus prevails, making the rest nameless. In ancient days, it is said, there was not yet this channel and outfall, but those rivers and the Boebean lake, note which was not yet named, had the same volume of water as now, and thereby turned all Thessaly into a sea.
7.129.4
Now the Thessalians say that Poseidon made the passage by which the Peneus flows. This is reasonable, for whoever believes that Poseidon is the shaker of the earth and that rifts made by earthquakes are the work of that god will conclude, upon seeing that passage, that it is of Poseidon's making. It was manifest to me that it must have been an earthquake which forced the mountains apart. note
ch. 130
7.130.1
Xerxes asked his guides if there were any other outlet for the Peneus into the sea, and they, with their full knowledge of the matter, answered him: “The river, O king, has no other way into the sea, but this alone. This is so because there is a ring of mountains around the whole of Thessaly.” Upon hearing this Xerxes said: “These Thessalians are wise men;
