Themistocles, in great distress that the Greeks should return, and lost the advantage of the narrow seas and strait passage, and slip home very one to his own city, considered with himself, and contrived that stratagem which was carried out by Sicinnus. this Sicinnus was a Persian captive, but a great lover of Themistocles, and the attendant of his children. Upon this occasion he sent him privately to Xerxes, commanding him to tell the king that Themistocles, the admiral of the Athenians, having espoused his interest, wished to be the first to inform him that the Greeks were ready to make their escape, and that he counseled him to hinder their flight, to set upon them while they were in this confusion and at a distance from their land army, and thereby destroy all their forces by sea. Xerxes was very joyful at this message, and received it as from one who wished him all that was good. and immediately issued instructions to the commanders of his ships that they should instantly set out with two hundred galleys to encompass all the islands, and enclose all the straits and passages, that none of the Greeks might escape, and that they should afterward follow with the rest of their fleet at leisure.
This being done, Aristides, the son of Lysimachus, was the first man that perceived it, and went to the test of Themistocles, not out of any friendship, for he had been formerly banished by his means, as has been related, but to inform him how they were encompassed by their enemies. Themistocles, knowing the generosity of Aristides, and much struck by his visit at that time, imparted to him all that he had transacted by Sicinnus, and entreated him that, as he would be more readily believed among the Greeks, he would make use of his credit to help to induce them to stay and fight their enemies in the narrow seas. Aristides applauded Themistocles, and went to the other commanders and captains of the galleys and encouraged them to engage; yet they did not perfectly assent to him till a galley of Tenos, which deserted from the Persians, of which Panaetius was commander, came in, while they were still doubting, and confirmed the news that all the straits and passages were beset; and then their rage and fury, as well as their necessity, provoked them all to fight.
As soon as it was day, Xerxes placed himself high up, to view his fleet, as Acestodorus writes, in the confines of Megara, upon those hills which are called the Horns, where he sat in a chair of gold, with many secretaries about him to write down all that was done in the fight.
The number of the enemy's ships the poet Aeschylus gives in his tragedy called the Persians, as on his certain knowledge, in the following words:
Xerxes, I know, did into battle lead One thousand ships; of more than usual speed Seven and two hundred. So is it agreed.
The Athenians had a hundred and eighty; in every ship eighteen men fought upon the deck, four of whom were archers and the rest men-at-arms.
As Themistocles had fixed upon the most advantageous place, so, with no less sagacity, he chose the best time of fighting; for he would not run the prows of his galleys against the Persians, nor begin the fight till the time of day was come when there regularly blows in a fresh breeze from the open sea, and brings in with it a strong swell into the channel; this was no inconvenience to the Greek ships, which were low-built, and little above the water, but did much hurt to the Persians, which had high sterns and lofty decks, and were heavy and cumbrous in their movements, as it presented them broadside to the quick charges of the Greeks, who kept their eyes upon the motions of Themistocles, as their best example, and more particularly because, opposed to his ship, Ariamenes, admiral to Xerxes, a brave man, and by far the best and worthiest of the king's brothers, was seen throwing darts and shooting arrows from his huge galley, as from the walls of a castle. Aminias the Decelean and Sosicles the Pedian, who sailed in the same vessel, upon the ships meeting stem to stem, and transfixing each the other with their brazen prows, so that they were fastened together, when Ariamenes attempted to board theirs, ran at them with their pikes, and thrust him into the sea; his body, as it floated amongst other shipwrecks, was discovered by Artemisia, and carried to Xerxes.
The first man that took a ship was Lycomedes the Athenian, captain of a galley, who cut down its ensign, and dedicated it to Apollo the Laurel-crowned. And as the Persians fought in a narrow sea, and could bring but part of their fleet to fight, and fell foul of one another, the Greeks thus equaled them in strength, and fought with them till the evening, forced them back, and obtained, as says Simonides, that noble and famous victory, than which neither amongst the Greeks nor barbarians was ever known more glorious exploit on the seas; by the joint valor, indeed, and zeal of all who fought, but most by the wisdom and sagacity of Themistocles.
After this sea-fight, Xerxes, enraged at his ill-fortune, attempted, by casting great heaps of earth and stones into the sea, to stop up the channel and to make a dam, upon which he might lead his land forces over into the island of Salamis.