But even in retreat, the active spirit of Themistocles was intent upon expedients. It was more than suspected that a considerable portion of the Ionians now in the service of Xerxes were secretly friendly to the Greeks. In the swiftest of the Athenian vessels Themistocles therefore repaired to a watering-place on the coast, and engraved upon the rocks these words, which were read by the Ionians the next day.

"Men of Ionia, in fighting against your ancestors, and assisting to enslave Greece, you act unworthily. Come over to us; or if that may not be, at least retire from the contest, and prevail on the Carians to do the same. If yet neither secession nor revolt be practicable, at least when we come to action exert not yourselves against us. Remember that we are descended from one common race, and that it was on your behalf that we first incurred the enmity of the Persian."

A subtler intention than that which was the more obvious, was couched beneath this exhortation. For if it failed to seduce the Ionians, it might yet induce Xerxes to mistrust their alliance.

When the Persians learned that the Greeks had abandoned their station, their whole fleet took possession of the pass, possessed themselves of the neighbouring town of Histiaea, and overrunning a part of the Isle of Euboea, received the submission of the inhabitants.

Xerxes now had recourse to a somewhat clumsy, though a very commonly practised artifice. Twenty thousand of his men had fallen at Thermopylae: of these he buried nineteen thousand, and leaving the remainder uninterred, he invited all who desired it, by public proclamation, to examine the scene of contest. As a considerable number of helots had joined their Spartan lords and perished with them, the bodies of the slain amounted to four thousand [75], while those of the Persians were only one thousand. This was a practical despotic bulletin.

V. Of all the neighbouring district, the Phocians had alone remained faithful to the Grecian cause: their territory was now overrun by the Persians, at the instance of their hereditary enemies, the Thessalians, destroying city and temple, and committing all the horrors of violence and rapine by the way. Arrived at Panopeae, the bulk of the barbarian army marched through Boeotia towards Athens, the great object of revenge, while a separate detachment was sent to Delphi, with a view of plundering the prodigious riches accumulated in that celebrated temple, and of which, not perhaps uncharacteristically, Xerxes was said to be better informed than of the treasures he had left behind in his own palace.

But the wise and crafty priesthood of Delphi had been too long accustomed successfully to deceive mankind to lose hope or self-possession at the approach even of so formidable a foe. When the dismayed citizens of Delphi ran to the oracle, demanding advice and wishing to know what should be done with the sacred treasures, the priestess gravely replied that "the god could take care of his own possessions, and that the only business of the citizens was to provide for themselves;" a priestly answer, importing that the god considered his possessions, and not the flock, were the treasure. The one was sure to be defended by a divinity, the other might shift for themselves.

The citizens were not slow in adopting the advice; they immediately removed their wives and children into Achaia—while the males and adults fled—some to Amphissa, some amid the craggy recesses of Parnassus, or into that vast and spacious cavern at the base of Mount Corycus, dedicated to the Muses, and imparting to those lovely deities the poetical epithet of Corycides. Sixty men, with the chief priest, were alone left to protect the sacred city.

VI. But superstition can dispense with numbers in its agency. Just as the barbarians were in sight of the temple, the sacred arms, hitherto preserved inviolable in the sanctuary, were seen by the soothsayer to advance to the front of the temple. And this prodigy but heralded others more active. As the enemy now advanced in the stillness of the deserted city, and impressed doubtless by their own awe (for not to a Persian army could there have seemed no veneration due to the Temple of the Sun!) just by the shrine of Minerva Pronaea, built out in front of the great temple, a loud peal of thunder burst suddenly over their heads, and two enormous fragments of rock (separated from the heights of that Parnassus amid whose recesses mortals as well as gods lay hid) rolled down the mountain-side with a mighty crash, and destroyed many of the Persian multitude. At the same time, from the temple of the warlike goddess broke forth a loud and martial shout, as if to arms. Confused—appalled—panic-stricken by these supernatural prodigies—the barbarians turned to fly; while the Delphians, already prepared and armed, rushed from cave and mountain, and, charging in the midst of the invaders, scattered them with great slaughter. Those who escaped fled to the army in Boeotia. Thus the treasures of Delphi were miraculously preserved, not only from the plunder of the Persian, but also from the clutch of the Delphian citizens themselves, who had been especially anxious, in the first instance, to be permitted to deposite the treasures in a place of safety. Nobody knew better than the priests that treasures always diminish when transferred from one hand to another.

VII. The Grecian fleet anchored at Salamis by the request of the Athenians, who were the more anxious immediately to deliberate on the state of affairs, as the Persian army was now approaching their borders, and they learned that the selfish warriors of the Peloponnesus, according to their customary policy, instead of assisting the Athenians and Greece generally, by marching towards Boeotia, were engaged only in fortifying the isthmus or providing for their own safety.