"We'll have to be careful. They may come back and catch us," answered his brother.
"We'll watch out for that."
With caution the boys began to look around them.
"Look!" cried Frank in a low tone.
He bent down and from the rocky floor picked up a big bunch of keys.
"Auto keys," came from Joe.
"Yes, and all different. I suppose they have all the keys necessary to unlock any car."
"More than likely."
Near the keys they found a dark coat and a cap.
"I guess the keys dropped out of that coat," remarked Frank.