He persuaded the traitorous nobles to suffer him to treat with Artaphernes--successfully represented to that satrap the advantages of annexing the gem of the Cyclades to the Persian diadem--and Darius, listening to the advice of his delegate, sent two hundred vessels to the invasion of Naxos (B. C. 501), under the command of his kinsman, Megabates. A quarrel ensued, however, between the Persian general and the governor of Miletus. Megabates, not powerful enough to crush the tyrant, secretly informed the Naxians of the meditated attack; and, thus prepared for the assault, they so well maintained themselves in their city, that, after a siege of four months, the pecuniary resources, not only of Megabates, but of Aristagoras, were exhausted, and the invaders were compelled to retreat from the island. Aristagoras now saw that he had fallen into the pit he had digged for others: his treasury was drained--he had incurred heavy debts with the Persian government, which condemned him to reimburse the whole expense of the enterprise--he feared the resentment of Megabates and the disappointment of Artaphernes--and he foresaw that his ill success might be a reasonable plea for removing him from the government of Miletus. While he himself was meditating the desperate expedient of a revolt, a secret messenger from Histiaeus suddenly arrived at Miletus. That wily Greek, disgusted with his magnificent captivity, had had recourse to a singular expedient: selecting the most faithful of his slaves, he shaved his scull, wrote certain characters on the surface, and, when the hair was again grown, dismissed this living letter to Aristagoras [264]. The characters commanded the deputy to commence a revolt; for Histiaeus imagined that the quiet of Miletus was the sentence of his exile. II. This seasonable advice, so accordant with his own views, charmed Aristagoras: he summoned the Milesians, and, to engage their zealous assistance, he divested himself of the tyranny, and established a republic. It was a mighty epoch that, for the stir of thought!-- everywhere had awakened a desire for free government and equal laws; and Aristagoras, desirous of conciliating the rest of Ionia, assisted her various states in the establishment of republican institutions. Coes, the tyrant of Mitylene, perished by the hands of the people; in the rest of Ionia, the tyrants were punished but by exile. Thus a spark kindled the universal train already prepared in thought, and the selfish ambition of Aristagoras forwarded the march of a revolution in favour of liberty that embraced all the cities of Ionia. But Aristagoras, evidently a man of a profound, though tortuous policy, was desirous of engaging not only the colonies of Greece, but the mother country also, in the great and perilous attempt to resist the Persian. High above all the states of the elder Greece soared the military fame of Sparta; and that people the scheming Milesian resolved first to persuade to his daring project.