“But the name,” argued Bob. “How do you figure that out? The fellow we think is the thief gave his name as Henry Overton, while this driver’s license has the name Harry Walker.”

“Maybe that was only an alias, or false name,” suggested Joe. “He could easily have changed that. But what do we do now, Bob?”

“More than I know. What do you suggest?”

“Suppose we go back in Jordan’s house and see our dads. We’ll have to hurry, though, or this thief will beat us to it.”

“To what?”

“As I was saying,” resumed Joe, “we’ll go back and get our dads, and the four of us can go out to this thief’s house and be there when he gets there.”

“Then what?”

“Easy enough. We’ll arrest him and make him get the stolen specimens.”

“But can we do it?” demanded Bob. “Will we be allowed to?”

“Sure. We’ve got the goods on him, haven’t we? We know that the specimens that Mr. Jordan read off are the stolen ones, don’t we?”