When Siegfried returned to the cavern, the Mime began to tell him that he must learn to fear, before he could go forth into the world to seek adventures. He told Siegfried of the horrible dragon, Fafner, who guarded the Rheingold and the Ring, thinking to strike terror to the youth's heart; but Siegfried became at once impatient to go in search of the dragon, that he might know what the experience of fear was. "Where is that strong sword you are to make for me?" he demanded, being thus put in mind of it again. The wretched Mime knew not what to answer. "Alas!" he sighed; "I have no fire hot enough to fuse the metal." "Now by my head, I will stand no more of thee!" Siegfried shouted. "Get away from that forge and give me the sword's pieces. I'll forge that sword of my father's and teach thee thy trade before I break thy neck." So saying, he grasped the fragments of the sword, began to heap up the charcoal, and to blow the bellows. Then he screwed the pieces into a vise and began to file them. "Use the solder," the Mime directed. "It is there, ready for thee." "Solder? What should I do with solder?" he said, and continued to file the pieces till the file was in shreds. In time he had ground the pieces to powder, which he caught in a crucible and put upon the fire. While he blew the bellows with a great roaring of the fire, he sang the song of Nothung, the invincible sword. [Music: Nothung! Nothung! conquering sword! What blow has served to break thee? To shreds I shattered thy shining blade; the fire has melted the splinters Ho ho! Ho ho! Ho hei! Ho hei! Ho ho! Bellows blow! Brighten the glow.] As the Mime watched that easy forging of the mighty weapon, he believed that Siegfried was the one who would slay the dragon as Wotan had foretold. If he did that then he surely would possess himself of the treasure and the ring. So the Mime fell to planning how he could get the gold into his own hands. Siegfried knew nothing of gold and power, and so, why should he not willingly hand the treasure over to the Mime? Then the Mime would determine that Siegfried should perish, and by the ring's magic his destruction would come about, leaving the Mime lord of all. So the Mime decided it was well that Siegfried should forge the sword, because the Mime, even if he had such a sword, had known fear, and therefore, could not kill the Dragon with it. Siegfried must do this and the Mime should profit by it, and afterward kill Siegfried. Thus he reasoned. All this time Siegfried had been at work upon his sword. He had poured the molten metal into a mould, and held the mould high above his head. Presently he plunged it into cold water, and a great hissing of steam occurred. Again he thrust the sword into the fire to harden it the more, and meantime the Mime was fussing about the fire, making a broth. "What is the devil's brew thou art making," Siegfried demanded giving him a lowering look.