The son picked up his bread and said, "Just you rest, father. I am not tired. I will walk about a little in the woods and look for birds' nests."
"Oh, you fool," said the father, "why do you want to run about? Afterwards you will be tired and no longer able to lift an arm. Stay here, and sit down beside me."
But the son went into the woods, ate his bread, was very cheerful, and looked into the green branches to see if he could find a bird's nest. He walked to and fro until at last he came to an enormous oak that was certainly many hundred years old, and that five men would not have been able to span. He stood there looking at it, and thought, "Many a bird must have built its nest in that tree."
Then suddenly he thought that he heard a voice. Listening, he became aware of someone calling out with a muffled voice, "Let me out. Let me out."