Kleisthenês, with the seven hundred exiled families, was immediately recalled, and his new constitution materially strengthened by this first success. Yet the prospect of renewed Spartan attack was sufficiently serious to induce him to send envoys to Artaphernês, the Persian satrap at Sardis, soliciting the admission of Athens into the Persian alliance: he probably feared the intrigues of the expelled Hippias in the same quarter. Artaphernês, having first informed himself who the Athenians were, and where they dwelt,—replied that, if they chose to send earth and water to the king of Persia, they might be received as allies, but upon no other condition. Such were the feelings of alarm under which the envoys had quitted Athens, that they went the length of promising this unqualified token of submission. But their countrymen, on their return, disavowed them with scorn and indignation.[292] [292] Herodot. v, 73. It was at this time that the first connection began between Athens and the little Bœotian town of Platæa, situated on the northern slope of the range of Kithæron, between that mountain and the river Asôpus,—on the road from Athens to Thebes; and it is upon this first occasion that we become acquainted with the Bœotians and their polities. In one of my preceding volumes,[293] the Bœotian federation has already been briefly described, as composed of some twelve or thirteen autonomous towns under the headship of Thebes, which was, or professed to have been, their mother-city. Platæa had been, so the Thebans affirmed, their latest foundation;[294] it was ill-used by them, and discontented with the alliance. Accordingly, as Kleomenês was on his way back from Athens, the Platæans took the opportunity of addressing themselves to him, craved the protection of Sparta against Thebes, and surrendered their town and territory without reserve. The Spartan king, having no motive to undertake a trust which promised nothing but trouble, advised them to solicit the protection of Athens, as nearer and more accessible for them in case of need. He foresaw that this would embroil the Athenians with Bœotia; and such anticipation was in fact his chief motive for giving the advice, which the Platæans followed. Selecting an occasion of public sacrifice at Athens, they dispatched thither envoys, who sat down as suppliants at the altar, surrendered their town to Athens, and implored protection against Thebes. Such an appeal was not to be resisted, and protection was promised; it was soon needed, for the Thebans invaded the Platæan territory, and an Athenian force marched to defend it. Battle was about to be joined, when the Corinthians interposed with their mediation, which was accepted by both parties. They decided altogether in favor of Platæa, pronouncing that the Thebans had no right to employ force against any seceding member of the Bœotian federation.[295] But the Thebans, finding the decision