“You’re wrong. Come with me to the tunnel, and we’ll find him.”

“Can’t. Got a date to search an island; date with that college girl, Grace Palmer.”

“An island?” Johnny pondered. “Oh, yes, I remember.”

Johnny did remember many things about that island. Thrilling adventures had come to him there when the island was younger, as you will recall if you have read the book called The Fire Bug.

“Might be something to it,” he said thoughtfully. “Well, you look that place over and I’ll take a look at the tunnel. Somehow, we must find that man.

“Old Greasy Thumb and his pals were at the bottom of this Air Mail robbery, or I’m a green one. Thing to do is to get evidence, then get them. Next time they’ll stay in jail.

“One thing troubles me most of all.” His brow wrinkled. “That’s the way the Chief acts about the whole affair. Then, too, there’s that reporter. He’s certainly a queer one. You don’t expect to find anything wrong with a reporter from a paper like the World. They’re always on the side of decency, and honest reform. Oh, well, we may be all wrong about everything. Time’ll tell.

“You’d better hurry over and keep your date. I hope we’re going to be seeing a lot of each other.”

“Hope so.” Curlie hastened away.

They were indeed, and the result was to be adventure such as seldom comes to any one.