Without a word they both followed him.

The moonlight was bright and everything was quite still except for the noise of the river chattering over the stones. Then Susan suddenly caught Lucy’s arm and said, “Look!” On the far side of the camping ground, just where the trees began, they saw the Lion slowly walking away from them into the wood. Without a word they both followed him.

He led them up the steep slope out of the river valley and then slightly to the left—apparently by the same route which they had used that afternoon in coming from the Hill of the Stone Table. On and on he led them into dark shadows and out into the pale moonlight, getting their feet wet with the heavy dew. He looked somehow different from the Aslan they knew. His tail and his head hung low and he walked slowly as if he were very, very tired. Then, when they were crossing a wide open place where there were no shadows for them to hide in, he stopped and looked round. It was no good trying to run away so they came towards him. When they were closer he said,

“Oh, children, children, why are you following me?”

“We couldn’t sleep,” said Lucy—and then felt sure that she need say no more and that Aslan knew all they had been thinking.

“Please, may we come with you—wherever you’re going?” said Susan.

“Well—“said Aslan and seemed to be thinking. Then he said, “I should be glad of company to-night. Yes, you may come, if you will promise to stop when I tell you, and after that leave me to go on alone.”

"Oh, thank you, thank you. And we will," said the two girls.
...

“Aslan! Dear Aslan!” said Lucy, “what is wrong? Can’t you tell us?”

“Are you ill, dear Aslan?” asked Susan.

“No,” said Aslan, “I am sad and lonely. Lay your hands on my mane so that I can feel you are there and let us walk like that.”

And so the girls did what they would never have dared to do without his permission but what they had longed to do ever since they first saw him—buried their cold hands in the beautiful sea of fur and stroked it and, so doing, walked with him. And presently they saw that they were going up the slope of the hill on which the Stone Table stood. They went up at the side where the trees came furthest up, and when they got to the last tree (it was one that had some bushes about it) Aslan stopped and said,

"Oh, children, children. Here you must stop. And whatever happens, do not let yourselves be seen. Farewell."
~L,W & W, C.S. Lewis