"About quarter of a mile farther."
The professor saw that he must proceed to his final joke.
"Let me out! Don't keep me locked up here!" said the child's voice, from behind, in a pleading tone.
"What's that?" asked the startled old lady.
"What's what?" asked the professor, innocently.
"That child that wants to get out."
"You must have dreamed it, my good lady."
"No, there 'tis agin'," said the old lady, excited.
"It's in the trunk behind you," said the assumed voice, appearing to proceed from our hero.
"So 'tis," said the old lady, turning halfway round.