But he had been thinking long and hard and he had a plan.

Finally he announced to Paul that they would build a raft.
"I believe this is the same river that runs by Wareville," he said.

"I never heard Ross or Shif'less Sol or any of the men speak of another river, near enough for us to have reached it, since we've been wandering around.

So it must be the same.

Now either we are above Wareville or we are below it.