son not to be relied upon," remarked the balloonist grimly. "Now this is the way I size it up: Of course, all I know officially is that Andy Foger has sent in an entry for the big race for the ten-thousand-dollar prize which is offered by the Eagle Park Aviation Association. I'm a member of the arrangements committee, and so I know. I also know that you and several others are going to try for the prize. That's all I am absolutely sure of.
"Now, when you tell me about the missing plans, and you conclude that Andy is doing some underhanded work, I agree with you. But I go a step farther. I don't believe he's out of town at all."
"Why not?" exclaimed Tom.
"Because when he has an airship shed right in his own backyard, where, you tell me, he once made a craft in which he tried to beat you out in the trip to Alaska, when you think of that, doesn't it seem reasonable that he'd use that same building in which to make his new craft?"
"Yes, it does," admitted Tom slowly, "but then everybody says he's out of town."
"Well, what everybody says is generally not so. I think you'll find that Andy is keeping himself in seclusion, and that he's working secretly
