And Merlin answered: "I can see as it were pictures of all that is and all that shall be. I will go with you to Fortager, and show what hinders building up his fortress on the Plain." So he mounted a pony, and followed after the men on horseback. And as they journeyed through a town, they saw a man buying strong new shoes and leather wherewith to mend them when they wore out; and Merlin laughed to himself. "Why do you laugh?" asked the messengers. "Because he will never wear the shoes," replied the boy. And so it came to pass, for the man fell dead at his door as he carried home the shoes. And next day Merlin laughed again, and, being asked why, said: "King Fortager is jealous because his Queen's chamberlain is better looking than he, and he threatens to take his life, knowing not that the handsome fellow is but a woman in disguise." And when they came to the palace, they found that it was just as the boy had said, so the chamberlain's life was spared. Then Fortager marvelled greatly at the wisdom of this child of five years, and begged him to reveal the mystery of his castle wall. And Merlin said: "The fiends have deceived your wise men by showing false signs among the stars; for my kindred of the air are very wroth because I have been baptised into Christendom, and they seek to destroy my life. But if you send your men to dig a yard beneath the wall's foundation, they will there find a stream of water running over two mighty stones, under which live two dragons. Each night at sundown these dragons wake, and do battle, so that the earth is shaken, and the wall falls down." Then Fortager set his men to dig beneath the foundations as Merlin had said; and presently they came to a fast and furious stream, which they turned off by making another channel. And in the river-bed were two huge stones, which it took many men to heave up, and there beneath them lay the dragons. One was as red as fire, and his body a rood in length, with eyes that gleamed like red-hot coals, and a strong and supple tail. The other was milk-white, and very grim of look; he had two heads, and darted out white fire from his jaws. And at sight of them, as they awoke from slumber, all save Merlin fled in panic. Then the dragons arose, and began to fight. And soon the air was full of the fiery breath from their throats, so that it was like lightning on the earth, and the whole land shook with their noise and fury. All that long summer night they fought with tooth and nail and claw, and fell and rose, and fell and rose again, till the day dawned. And by that time the red dragon had driven the white into a valley, where for a while the latter stood at bay; but at length, recovering himself, he forced the red dragon back into the plain again, and, fixing his claws in his throat, tore him to pieces, and with his fiery flame scorched him up to a heap of ashes on the plain. Then the white dragon flew away into the air.