"What are we supposed to have done?" Dick queried.
"You're the youngsters who threw a volley of stones and broke the railroad signal lights."
"Guess again!" suggested Dave.
"Aren't the lights broken, and didn't I catch you moving away from the scene?" glared Mr. Green.
"Yes; but didn't you hear some other boys getting away at the same time?" demanded Prescott.
"Um! I—er—suppose I did."
"Doesn't it strike you that the boys who broke your signal lights were the ones who ran away so fast?"
"Then you boys didn't do it!"
"We certainly didn't."
"Who were the boys, then!"