The latter had lighted a torch, set fire to a portion of the nearby wood, and with brands therefrom touched the serpent's newly growing heads and prevented them from living. In this way the hero was at last master of the situation and was able to cut off even the head of the hydra that could not be killed. This he buried deep in the ground and rolled a heavy stone over the place. The body of the hydra he cut into half, dipping his arrows in the blood, which was poisonous. From that time the wounds made by the arrows of Hercules were fatal. THE THIRD LABOR The third demand of Eurystheus was that Hercules bring to him alive the hind Cerynitis. This was a noble animal, with horns of gold and feet of iron. She lived on a hill in Arcadia, and was one of the five hinds which the goddess Diana had caught on her first hunt. This one, of all the five, was permitted to run loose again in the woods, for it was decreed by fate that Hercules should one day hunt her. For a whole year Hercules pursued her; came at last to the river Ladon; and there captured the hind, not far from the city Oenon, on the mountains of Diana. But he knew of no way of becoming master of the animal without wounding her, so he lamed her with an arrow and then carried her over his shoulder through Arcadia. Here he met Diana herself with Apollo, who scolded him for wishing to kill the animal that she had held sacred, and was about to take it from him. "Impiety did not move me, great goddess," said Hercules in his own defense, "but only the direst necessity. How otherwise could I hold my own against Eurystheus?" And thus he softened the anger of the goddess and brought the animal to Mycene. THE FOURTH LABOR Then Hercules set out on his fourth undertaking. It consisted in bringing alive to Mycene a boar which, likewise sacred to Diana, was laying waste the country around the mountain of Erymanthus. On his wanderings in search of this adventure he came to the dwelling of Pholus, the son of Silenus. Like all Centaurs, Pholus was half man and half horse. He received his guest with hospitality and set before him broiled meat, while he himself ate raw. But Hercules, not satisfied with this, wished also to have something good to drink. "Dear guest," said Pholus, "there is a cask in my cellar; but it belongs to all the Centaurs jointly, and I hesitate to open it because I know how little they welcome guests." "Open it with good courage," answered Hercules, "I promise to defend you against all displeasure." As it happened, the cask of wine had been given to the Centaurs by Bacchus, the god of wine, with the command that they should not open it until, after four centuries, Hercules should appear in their midst.