The bigness of his wilderness no longer thrilled him, but oppressed him.
Peter sensed sharply the change in his master without knowing the reason for it.

Just as the world had changed for Jolly Roger, so Jolly Roger had changed for Peter.
They landed on a beach of sand, soft as a velvet carpet.

Peter jumped out.

A long-legged sandpiper and her mate ran down the shore ahead of him.

He perked up his angular ears, and then his nose caught a fresh scent under his feet where a porcupine had left his trail.