Xerxes was both astonished and enraged at these results. He determined that this trifling should continue no longer. He ordered the Immortals themselves to be called out on the following morning, and then, placing himself at the head of them, he advanced to the vicinity of the Greek intrenchments. Here he ordered a seat or throne to be placed for him upon an eminence, and, taking his seat upon it, prepared to witness the conflict. The Greeks, in the mean time, calmly arranged themselves on the line which they had undertaken to defend, and awaited the charge. Upon the ground, on every side, were lying the mangled bodies of the Persians slain the day before, some exposed fully to view, ghastly and horrid spectacles, others trampled down and half buried in the mire. The Immortals advanced to the attack, but they made no impression. Their superior numbers gave them no advantage, on account of the narrowness of the defile. The Greeks stood, each corps at its own assigned station on the line, forming a mass so firm and immovable that the charge of the Persians was arrested on encountering it as by a wall. In fact, as the spears of the Greeks were longer than those of the Persians, and their muscular and athletic strength and skill were greater, it was found that in the desperate conflict which raged, hour after hour, along the line, the Persians were continually falling, while the Greek ranks continued entire. Sometimes the Greeks would retire for a space, falling back with the utmost coolness, regularity, and order; and then, when the Persians pressed on in pursuit, supposing that they were gaining the victory, the Greeks would turn so soon as they found that the ardor of pursuit had thrown the enemies' lines somewhat into confusion, and, presenting the same firm and terrible front as before, would press again upon the offensive, and cut down their enemies with redoubled slaughter. Xerxes, who witnessed all these things from among the group of officers around him upon the eminence, was kept continually in a state of excitement and irritation. Three times he leaped from his throne, with loud exclamations of vexation and rage. All, however, was of no avail. When night came the Immortals were compelled to withdraw, and leave the Greeks in possession of their intrenchments.