’ DARIUS AND THE SCYTHIANS. 123 Histiaus, despot of Miletus, whose advice had saved the bridge for Darius, was richly rewarded for his service, and attended Darius on his return to Susa, the Persian capital, leaving his son-in-law Aristagoras in command at Miletus. Some ten years afterwards this regent of Miletus made an attempt, with Persian aid, to capture the island of Naxos. The effort failed, and Aristagoras, against whom the Persians were incensed by their defeat and their losses, was threatened with ruin. He began to think of a revolt from Persian rule. While thus mentally engaged, he received a strangely-sent message from Histieus, who was still detained at Susa, and who eagerly desired to get away from dancing attendance at court and return to his kingdom. Histisus advised his regent to revolt. But as this message was far too danger- ous to be sent by any ordinary channels, he adopted an extraordinary method to insure its secrecy. Selecting one of his most trusty slaves, Histisus had his head shaved, and then pricked or tattooed upon the bare scalp the message he wished to send. Keeping the slave in seclusion until his hair had grown again, he sent him to Miletus, where he was instructed simply to tell Aristagoras to shave and examine his head. Aristagoras did so, read the tattooed message, and immediately took steps to obey. Word of the proposed revolt was sent by him to the other cities along the coast, and all were found ready to join in the attempt to secure freedom. Not only the coast settlements, but the island of Cyprus,