'When shall I wake?' she said to herself in an agony, but the same moment knew that it was no dream. She threw herself upon the heap, and began to cry. It was well she did not know what creatures, one of them with stone shoes on her feet, were lying in the next cave. But neither did she know who was on the other side of the slab. At length the thought struck her that at least she could follow the thread backwards, and thus get out of the mountain, and home. She rose at once, and found the thread. But the instant she tried to feel it backwards, it vanished from her touch. Forwards, it led her hand up to the heap of stones--backwards it seemed nowhere. Neither could she see it as before in the light of the fire. She burst into a wailing cry, and again threw herself down on the stones. CHAPTER 21 The Escape As the princess lay and sobbed she kept feeling the thread mechanically, following it with her finger many times up to the stones in which it disappeared. By and by she began, still mechanically, to poke her finger in after it between the stones as far as she could. All at once it came into her head that she might remove some of the stones and see where the thread went next. Almost laughing at herself for never having thought of this before, she jumped to her feet. Her fear vanished; once more she was certain her grandmother's thread could not have brought her there just to leave her there; and she began to throw away the stones from the top as fast as she could, sometimes two or three at a handful, sometimes taking both hands to lift one. After clearing them away a little, she found that the thread turned and went straight downwards. Hence, as the heap sloped a good deal, growing of course wider towards its base, she had to throw away a multitude of stones to follow the thread. But this was not all, for she soon found that the thread, after going straight down for a little way, turned first sideways in one direction, then sideways in another, and then shot, at various angles, hither and thither inside the heap, so that she began to be afraid that to clear the thread she must remove the whole huge gathering. She was dismayed at the very idea, but, losing no time, set to work with a will; and with aching back, and bleeding fingers and hands, she worked on, sustained by the pleasure of seeing the heap slowly diminish and begin to show itself on the opposite side of the fire. Another thing which helped to keep up her courage was that, as often as she uncovered a turn of the thread, instead of lying loose upon the stone, it tightened up; this made her sure that her grandmother was at the end of it somewhere. She had got about half-way down when she started, and nearly fell with fright. Close to her ears as it seemed, a voice broke out singing: 'Jabber, bother, smash! You'll have it all in a crash. Jabber, smash, bother! You'll have the worst of the pother. Smash, bother, jabber!--'