Aslan

"Are you coming with us, Aslan?" said Jill.

"They shall see only my back," said Aslan.

He led them rapidly through the wood, and before they had gone many paces, the wall of Experiment House appeared before them.

Chapter 16, the Healing of Harms, The silver Chair

"Please," he said, "may we go home now?" He had forgotten to say "Thank you", but he meant it, and Aslan understood.

Chapter 14, the Magician’s Nephew pg 101

"You need no rings when I am with you," said the voice of Aslan. The children blinked and looked about them. They were once more in the Wood between the Worlds; Uncle Andrew lay on the grass, still asleep; Aslan stood beside them.

Chapter 15, the Magician’s Nephew pg 102

> > (For context, the rings are the magical devices that the children originally used to travel between worlds.)
"Come," said Aslan; "it is time that you went back. But there are two things to see to first; a warning, and a command. Look here, children."

They looked and saw a little hollow in the grass, with a grassy bottom, warm and dry.

"When you were last here," said Aslan, "that hollow was a pool, and when you jumped into it you came to the world where a dying sun shone over the ruins of Charn. There is no pool now. That world is ended, as if it had never been. Let the race of Adam and Eve take warning."
> > [...]
Both the children were looking up into the Lion's face as he spoke these words. And all at once (they never knew exactly how it happened) the face seemed to be a sea of tossing gold in which they were floating, and such a sweetness and power rolled about them and over them and entered them that they felt they had never really been happy or wise or good, or even alive and awake, before. And the memory of that moment stayed with them always, so that as long as they both lived, if ever they were sad or afraid or angry, the thought of all that golden goodness, and the feeling that it was still there, quite close, just round some corner or just behind some door, would come back and make them sure, deep down inside, that all was well. Next minute all three of them (Uncle Andrew now awake) came tumbling into the noise, heat, and hot smells of London.

Chapter 15, the end of this story and the beginning of all others.pg 102 The magician’s nephew.

"I am," said Aslan. "But there I have another name. You must learn to know me by that name. This was the very reason why you were brought to Narnia, that by knowing me here for a little, you may know me better there."

"And is Eustace never to come back here either?" said Lucy.

"Child," said Aslan, "do you really need to know that? Come, I am opening the door in the sky." Then all in one moment there was a rending of the blue wall (like a curtain being torn) and a terrible white light from beyond the sky, and the feel of Aslan's mane and a Lion's kiss on their foreheads and then—the back bedroom in Aunt Alberta's home at Cambridge.

Chapter 16, the very end of the world, Voyage of the Dawn Treader