The circumstances seemed favourable for the establishment of a base which would immediately threaten the European shore. Aristagoras had asked for one hundred ships; and, for some reason which is not satisfactorily accounted for in the story, had offered to defray the expenses of the expedition. So thoroughly did Artaphernes approve of the plan that, in order to ensure its success, he offered to furnish double the number of ships for which Aristagoras had asked, provided Darius assented to the proposed expedition. It is evident that the custom, if not the constitution, of the empire under Darius did not permit even a great satrap like Artaphernes, who was the king’s own brother, to call out a force of considerable magnitude without leave from the king himself. ◆H. v. 31.◆ Artaphernes further promised that the ships should be ready in the coming spring, which shows that Aristagoras’ visit to Sardes must have been made in the first year of the fifth century, probably in the winter of 500 B.C. Aristagoras returned to Miletus elated at his diplomatic success. A few months must have elapsed ere Artaphernes received a despatch from Susa approving of his proposal. The assent of Darius is important, as showing that the king was quite willing to resume his designs on Greece when fair opportunity offered. The true tale of what followed is one of the many unsolved riddles of this period. As told by Herodotus, it runs as follows:— #FAILURE AT NAXOS.# Artaphernes prepared a fleet of two hundred triremes, together with a considerable force of Persians and other allies, and appointed Megabates, a member of the Achæmenid family, and cousin of Darius, to the command. This armament he despatched to Miletus to pick up Aristagoras together with the Ionian contingent and the Naxian exiles. Thence the expedition sailed to Kaukasa in Chios, with the pretended object of operating in the Hellespontine district,—a pretence which would not have been very effective had the operations of Otanes left it in a wholly satisfactory state of subjection. It was at Kaukasa that the design of the expedition was fated to be wrecked. Megabates, going his rounds, found a Myndian vessel without any guards set, and punished the Greek captain by causing him to be tied with his head through one of the oar-holes. On this being reported to Aristagoras, he made protest to Megabates; but as this had no effect, he himself released the man. A quarrel ensued between the two commanders, the result of which was that Megabates sent a ship and gave warning to the Naxians of the coming expedition. The latter prepared in all haste to meet the danger, and successfully resisted a four months’ siege. The attempt turned out a complete failure, and Aristagoras found himself in the position of guarantor of the expenses, without the means of meeting the guarantee. Such is the tale in Herodotus.