Such was the force--not insufficient in number, but stronger in heart, union, the memory of past victories, and the fear of future chains-- that pitched the tent along the banks of the rivulets which confound with the Asopus their waters and their names. XI. In the interim Mardonius had marched from his former post, and lay encamped on that part of the Asopus nearest to Plataea. His brave Persians fronted the Lacedaemonians and Tegeans; and, in successive order, ranged the Medes and Bactrians, the Indians and the Sacae, the Boeotians, Locrians, Malians, Thessalians, Macedonians, and the reluctant aid of a thousand Phocians. But many of the latter tribe about the fastnesses of Parnassus, openly siding with the Greeks, harassed the barbarian outskirts: Herodotus calculates the hostile force at three hundred and fifty thousand, fifty thousand of which were composed of Macedonians and Greeks. And, although the historian has omitted to deduct from this total the loss sustained by Artabazus at Potidaea, it is yet most probable that the barbarian nearly trebled the Grecian army--odds less fearful than the Greeks had already met and vanquished. XII. The armies thus ranged, sacrifices were offered up on both sides. It happened, by a singular coincidence, that to either army was an Elean augur. The appearance of the entrails forbade both Persian and Greek to cross the Asopus, and ordained each to act on the defensive. That the Persian chief should have obeyed the dictates of a Grecian soothsayer is sufficiently probable; partly because a superstitious people rarely despise the superstitions of another faith, principally because a considerable part of the invading army, and that perhaps the bravest and the most skilful, was composed of native Greeks, whose prejudices it was politic to flatter--perilous to affront. Eight days were consumed in inactivity, the armies confronting each other without motion; when Mardonius, in order to cut off the new forces which every day resorted to the Grecian camp, despatched a body of cavalry to seize the pass of Cithaeron. Falling in with a convoy of five hundred beasts of burden, carrying provisions from the Peloponnesus, the barbarians, with an inhumanity sufficient, perhaps, to prove that the detachment was not composed of Persians, properly so speaking, a mild though gallant people--slaughtered both man and beast. The provisions were brought to the Persian camp. XIII. During the two following days Mardonius advanced nearer to the Asopus, and his cavalry (assisted by the Thebans, who were the right arm of the barbarian army), in repeated skirmishes, greatly harassed the Greeks with much daring and little injury.