The oligarchists set fire to the town, but while it was burning a small Athenian squadron arrived from Naupactus, and its commander attempted, with great wisdom, to make peace between the contending parties. He had to all appearance effected this design, when a Peloponnesian fleet, more than four times as numerous as his own, appeared, under the command of Alci´das. The Athenians withdrew without loss, and Alcidas had Corcyra for the moment in his power; but with his usual want of promptness, he spent a day in ravaging the island, and, at night, beacon fires on Leucas announced the approach of an Athenian fleet outnumbering his own. Alcidas drew off before daybreak, leaving the oligarchists in the city to their fate. The next seven days were a reign of terror in Corcyra. The popular party, protected by the presence of the Athenians, abandoned itself to revenge. Civil hatred was stronger than natural affection. A father slew his own son; brothers had no pity for brothers. The aristocratic party was nearly exterminated; but five hundred escaped, and fortified themselves on Mount Isto´ne, near the capital. [Sidenote: B. C. 426.] =172.= The sixth year of the war opened with floods and earthquakes, which seemed an echo in nature of the moral convulsions of Greece. The plague was raging again at Athens. To appease the wrath of Apollo, a solemn purification of the isle of Delos, his birth-place, was performed in the autumn. All bodies that had been buried there were removed to a neighboring island, and the Delian festival was revived with increased magnificence. The usual Spartan invasion of Attica had been prevented this year, either by awe of the supposed wrath of the gods, or by fear of the plague; but in the seventh year of the war (B. C. 425), their king, Agis, again crossed the borders and ravaged the country. He was recalled, after fifteen days, by the news that the Athenians had established a military station on the coast of Messenia.