It was good advice. Siegfried did as Odin directed him. He went to work on the trench at once. It was soon finished, and then the young prince, sword in hand, was lying in watch for the dread monster. He did not have long to wait. He soon heard the sound of rolling stones. Then came a loud hiss, and immediately afterward he felt the serpent's fiery breath on his cheek. And now the serpent rolled over into the ditch, and Siegfried was covered by the folds of his huge body. He did not fear or falter. He thrust Balmung, his wonderful sword, deep into the monster's body. The blood poured forth in such torrents that the ditch began to fill fast. It was a time of great danger for Siegfried. He would have been drowned if the serpent in his death-agony had not rolled over on one side and given him a chance to free himself. In a moment more he was standing, safe and sound, by the side of the ditch. His bath in the serpent's blood had given him a great blessing. Hereafter it would be impossible for any one to wound him except in one tiny place on his shoulder. A leaf had fallen on this spot, and the blood had not touched it. "What did Siegfried do with the golden treasure?" asked Hans, when his father had reached this point in the story. "He had not sought it for himself, but for Mimer's sake. All he cared for was the power of killing the serpent." As soon as this was done, Mimer drew near and showed himself ungrateful and untrue. He was so afraid Siegfried would claim some of the treasure that he secretly drew Balmung from out the serpent's body, and made ready to thrust it into Siegfried. But at that very moment his foot slipped in the monster's blood, and he fell upon the sword and was instantly killed. Siegfried was filled with horror when he saw what had happened. He sprang upon his horse's back and fled as fast as possible from the dreadful scene. "What happened to Siegfried after that? Did he have any more adventures?" asked Bertha. "Yes, indeed. There were enough to fill a book. But there is one in particular you girls would like to hear. It is about a beautiful princess whom he freed from a spell which had been cast upon her." "What was her name, papa?" asked Gretchen. "Brunhild, the Queen of Isenland. She had been stung by the thorn of sleep." Odin, the great god, had said, "Brunhild shall not awake till some hero is brave enough to fight his way through the flames which shall constantly surround the palace. He must then go to the side of the sleeping maiden and break the charm by a kiss upon her forehead." When Siegfried, in his wanderings, heard the story of Brunhild, he said, "I will make my way through the flames and will myself rescue the fair princess."