"nothing can keep me from doing it," said he, "but tell me what i must do." "thou shalt know everything," said the king’s daughter; "when thou descendest the mountain on which the castle stands, a wild bull will stand below by a spring, and thou must fight with it, and if thou hast the luck to kill it, a fiery bird will spring out of it, which bears in its body a burning egg, and in the egg the crystal ball lies like a yolk. the bird will not, however, let the egg fall until forced to do so, and if it falls on the ground, it will flame up and burn everything that is near, and melt even ice itself, and with it the crystal ball, and then all thy trouble will have been in vain."