While fighting was in progress at Thermopylæ, a Greek fleet, under the command of the Spartan Eurybi'ades, that had been sent to guard the Euboean Sea, encountered the Persian ships at Artemis'ium. In several engagements that occurred, the Athenian vessels, commanded by Themistocles, were especially distinguished; and although the contests with the enemy were not decisive, yet, says PLUTARCH, "they were of great advantage to the Greeks, who learned by experience that neither the number of ships, nor the beauty and splendor of their ornaments, nor the vaunting shouts and songs of the Persians, were anything dreadful to men who know how to fight hand-to-hand, and are determined to behave gallantly. These things they were taught to despise when they came to close action and grappled with the foe. Hence in this respect, and for this reason, Pindar's sentiments appear just, when he says of the fight at Artemisium, "'Twas then that Athens the foundation laid Of Liberty's fair structure.'" Although the Greeks were virtually the victors in these engagements, at least one-half of their vessels were disabled; and, hearing of the defeat of Leonidas at Thermopylæ, they resolved to retreat. Having sailed through the Euboean Sea, the fleet kept on its way until it reached the Island of Salamis, in the Saron'ic Gulf. Here Themistocles learned that no friendly force was guarding the frontier of Attica, although the Peloponnesian states had promised to send an army into Bœotia; and he saw that there was nothing to prevent the Persians from marching on Athens. He therefore advised the Athenians to abandon the city to the mercy of the Persians, and commit their safety and their hopes of victory to the navy. The advice was adopted, though not without a hard struggle; and those of the inhabitants who were able to bear arms retired to the Island of Salamis, while the old and infirm, the women and children, found shelter in a city of Argolis. THE BATTLE OF SALAMIS.