If the news from Argos reached Seriphos, we may guess that the news from Seriphos reached Argos, and that Acrisius heard how a woman as beautiful as a goddess, with a boy of the race of the gods, had drifted to the shore of the little isle. Acrisius knew, and fear grew about his heart, fear that was sharper as the years went on, while Perseus was coming to his manhood. Acrisius often thought of ways by which he might have his grandson slain; but none of them seemed safe. By the time when Perseus was fifteen, Acrisius dared not go out of doors, except among the spears of his armed guards, and he was so eaten up by fear that it would have been happier for him if he had never been born. II THE VOW OF PERSEUS It was fortunate for Perseus that Dictys treated him and taught him like his own son, and checked him if he was fierce and quarrelsome, as so strong a boy was apt to be. He was trained in all the exercises of young men, the use of spear and sword, shield and bow; and in running, leaping, hunting, rowing, and the art of sailing a boat. There were no books in Seriphos, nobody could read or write; but Perseus was told the stories of old times, and of old warriors who slew monsters by sea and land. Most of the monsters had been killed, as Perseus was sorry to hear, for he desired to try his own luck with them when he came to be a man. But the most terrible of all, the Gorgons, who were hated by men and gods, lived still, in an island near the Land of the Dead; but the way to that island was unknown. These Gorgons were two sisters, and a third woman; the two were hideous to look on, with hair and wings and claws of bronze, and with teeth like the white tusks of swine. Swinish they were, ugly and loathsome, feeding fearfully on the bodies of unburied men. But the third Gorgon was beautiful save for the living serpents that coiled in her hair. She alone of the three Gorgons was mortal, and could be slain, but who could slay her? So terrible were her eyes that men who had gone up against her were changed into pillars of stone. This was one of the stories that Perseus heard when he was a boy; and there was a proverb that this or that hard task was 'as difficult to do as to slay the Gorgon.' Perseus, then, ever since he was a little boy, was wondering how he could slay the Gorgon and become as famous as the strong man Heracles, or the good knight Bellerophon, who slew the Chimaera. Perseus was always thinking of such famous men as these, and especially loved the story of Bellerophon, which is this: