The first thing to be done was to contrive some safe and secret way to communicate with Aristagoras. This he effected in the following manner: There was a man in his court who was afflicted with some malady of the eyes. Histiaeus told him that if he would put himself under _his_ charge he could effect a cure. It would be necessary, he said, that the man should have his head shaved and scarified; that is, punctured with a sharp instrument, previously dipped in some medicinal compound. Then, after some further applications should have been made, it would be necessary for the patient to go to Ionia, in Asia Minor, where there was a physician who would complete the cure. The patient consented to this proposal. The head was shaved, and Histiaeus, while pretending to scarify it, pricked into the skin--as sailors tattoo anchors on their arms--by means of a needle and a species of ink which had probably no great medicinal virtue, the words of a letter to Aristagoras, in which he communicated to him fully, though very concisely, the particulars of his plan. He urged Aristagoras to revolt, and promised that, if he would do so, he would come on, himself, as soon as possible, and, under pretense of marching to suppress the rebellion, he would really join and aid it. As soon as he had finished pricking this treasonable communication into the patient's skin, he carefully enveloped the head in bandages, which, he said, must on no account be disturbed. He kept the man shut up, besides, in the palace, until the hair had grown, so as effectually to conceal the writing, and then sent him to Ionia to have the cure perfected. On his arrival at Ionia he was to find Aristagoras, who would do what further was necessary. Histiaeus contrived, in the mean time, to send word to Aristagoras by another messenger, that, as soon as such a patient should present himself, Aristagoras was to shave his head. He did so, and the communication appeared. We must suppose that the operations on the part of Aristagoras for the purpose of completing the cure consisted, probably, in pricking in more ink, so as to confuse and obliterate the writing. Aristagoras was on the eve of throwing off the Persian authority when he received this communication. It at once decided him to proceed. He organized his forces and commenced his revolt. As soon as the news of this rebellion reached Susa, Histiaeus feigned great indignation, and earnestly entreated Darius to commission him to go and suppress it. He was confident, he said, that he could do it in a very prompt and effectual manner. Darius was at first inclined to suspect that Histiaeus was in some way or other implicated in the movement; but these suspicions were removed by the protestations which Histiaeus made, and at length he gave him leave to proceed to Miletus, commanding him, however, to return to Susa again as soon as he should have suppressed the revolt.