“All right. Lead the way.”

As quickly as they could, Bob and Joe went back in the house through a rear entrance. Then quietly they found the room in which Mr. Holton and Mr. Lewis were hiding.

The boys found their fathers waiting anxiously. The frown on their faces gave way to a smile as they caught sight of their sons.

“What did you find?” inquired Joe’s father.

Bob told of their desire to drive to the thief’s residence before the man could himself do so.

“I’m willing,” said Mr. Lewis, who was more than anxious to recover the stolen specimens. “While on our way we’ll stop at a police station and pick up an officer. I’d sort of hate to carry out your plan without doing that.”

Before leaving the house, Mr. Holton instructed the butler to inform Mr. Jordan of where they had gone. Then, with his son and friends, he hurried out to his car.

Mr. Lewis knew exactly where to find the residence of the thief, or at least the address that was on the driver’s license.

“It is several miles from here, but we’ll probably have a good start ahead of the thief,” Joe’s father said, as the automobile was driven out into a main traffic artery.