The Greeks were with difficulty persuaded not to abandon the sea altogether. Themistocles was bitterly opposed in his naval policy by Adeimantus, the Corinthian; it was only by threatening to leave Greece with their fleet that the Athenians were able to bring the allies to reason. By a stroke of cunning Themistocles forced their hands; a messenger went to Xerxes with news of the Greek intention to retreat; on hearing this the Persians during the night blocked up the passages round Salamis and landed some of their best troops on a little island called Psyttaleia. The news of this encircling movement was brought to the allies by Aristides, a celebrated Athenian who was in exile, and was confirmed by a Tenian ship which deserted from the Persians. Next morning the Greeks sailed down the strait to escape the blockade and soon the famous battle began. Among the brave deeds singled out for special mention none was bolder than that of Artemisia who sank a friend to escape capture. The remainder of the Persian captains had no chance of resisting, being huddled up in a narrow channel. Seeing Artemisia's courage Xerxes remarked that his men had become women, his women men. The rout of the invaders was quickly completed, the chief glory being won by Aegina and Athens; the victory was consummated by the slaughter of the troops on Psyttaleia. The Persian monarch sent tidings of this defeat to his capital and in terror of a revolt in Ionia decided to retreat, leaving Mardonius in command of picked troops. He hurriedly passed along the way he had come, almost disappearing from Herodotus' story. Mardonius accompanied him to Thessaly and Macedonia; he sent Alexander, King of the latter country, as an envoy to Athens, offering to rebuild the temples and restore all property in exchange for an alliance. Hearing the news the Spartans in fear for themselves sent a counter-embassy. The Athenian reply is one of the great things in historical literature. "It was a base surmise in men like the Spartans who know our mettle. Not all the gold in the world would tempt us to enslave our own countrymen. We have a common brotherhood with all Greeks, a common language, common altars and sacrifices, common nationality; it would be unseemly to betray these. We thank you for your offer to support our ruined families, but we will bear our calamities as we may and will not burden you. Lead out your troops; face the enemy in Boeotia and there give him battle."