It began to grow dark. And they wanted more than ever to reach the country whence the shadows fall. So they looked about them for a way out of the cave. The door by which Mossy entered had closed again, and there was half a mile of rock between them and the sea. Neither could Tangle find the opening in the floor by which the serpent had led her thither. They searched till it grew so dark that they could see nothing, and gave it up. After a while, however, the cave began to glimmer again. The light came from the moon, but it did not look like moonlight, for it gleamed through those seven pillars in the middle, and filled the place with all colours. And now Mossy saw that there was a pillar beside the red one, which he had not observed before. And it was of the same new colour that he had seen in the rainbow when he saw it first in the fairy forest. And on it he saw a sparkle of blue. It was the sapphires round the key-hole. He took his key. It turned in the lock to the sound of Aeolian music. A door opened upon slow hinges, and disclosed a winding stair within. The key vanished from his fingers. Tangle went up. Mossy followed. The door closed behind them. They climbed out of the earth; and, still climbing, rose above it. They were in the rainbow. Far abroad, over ocean and land, they could see through its transparent walls the earth beneath their feet. Stairs beside stairs wound up together, and beautiful beings of all ages climbed along with them. They knew that they were going up to the country whence the shadows fall. And by this time I think they must have got there. End of the Project Gutenberg EBook of The Light Princess and Other Fairy Stories, by George MacDonald