"You must be nice to him," Wendy impressed on her brothers.
"What could we do if he were to leave us!"

"We could go back," Michael said.

"How could we ever find our way back without him?"

"Well, then, we could go on," said John.

"That is the awful thing, John. We should have to go on, for
we don't know how to stop."

This was true, Peter had forgotten to show them how to stop.

John said that if the worst came to the worst, all they had to
do was to go straight on, for the world was round, and so in time
they must come back to their own window.