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Then coiling his length together, roaring like thunder underground, he sped from his deep lair through its great door, out into the huge passages of the mountain-palace and up towards the Front Gate. To hunt the whole mountain till he had caught the thief and had torn and trampled him was his one thought. He issued from the Gate, the waters rose in fierce whistling steam, and up he soared blazing into the air and settled on the mountain-top in a spout of green and scarlet flame. The dwarves heard the awful rumour of his flight, and they crouched against the walls of the grassy terrace cringing under boulders, hoping somehow to escape the frightful eyes of the hunting dragon. There they would have all been killed, if it had not been for Bilbo once again. Quick! Quick! he gasped.