THERMOPYLAE. 147

menes had just massacred six thousand out of their not probably more than ten thousand citizens. Gelon, the king of Syracuse, would have assisted, had not Sicily been just then invaded by a miscellaneous army of three hundred thousand men under the command of the Car- thaginian Hamilcar, possibly induced, through the Pho3- nicians, to make this diversion in favour of Xerxes. Gelon had the good fortune to destroy this host in the decisive battle of Himera, on the same day as the Greek victory at Salamis. The Corcyrseans temporised, with their historical selfishness ; the Cretans excused them- selves on the faith of an oracle ; so the Greeks proper were left to face their terrible enemy alone, and even among them there were many craven spirits who took the side of the Persian. Thessaly, through which the course of the invaders lay, is a basin of mountains, like Bohemia, cracked by the gorge of the Peneus, as Bohemia is by that of the Elbe. This basin was doubtless, as Herodo- tus says, once a lake, until it was tapped by some convulsion of nature. Xerxes thought flooding the country quite feasible, by damming up the outlet of the river : no such measure, however, was necessary. At first the Greeks had intended to make their stand there, in the Yale of Tempe, celebrated for its beauty. Over- hung by plane-woods, the high cliffs are festooned with creepers, and diversified with underwood, approach- ing here and there so closely as to leave barely room for the road and river. But they gave up this position when they found that Thessaly could easily be entered by another road over the mountains. They drew back towards the isthmus : and Thessaly at once made terms with the Persian king.