“Well, what did he tell you?” demanded Miles impatiently.

“About all I wanted to know. I posed as being interested in young Nevins, but not wanting him to know that I was around till the success or failure of the Electric Hydroaeroplane was assured.”

“Now comes it oudt,” muttered Heiny, pricking up his ears.

“Yes, and then—upon my word you are slow. Hank,” came Miles’s voice.

“Humph! that’s all the thanks I get after all the work I’ve done,” came in an aggrieved voice from Hank.

“That’s all right, Hank. Of course I know you’ve done well. But get down to cases.”

“Well, then,” continued Hank in a sulky tone, “I learned that the Electric Monarch is completed. The trial trip will probably take place to-morrow morning, or it may be delayed till night. If we mean to strike, we must do so quickly.”

“Yes, if we can’t get hold of the plans we must do all we can to cripple the ship, for if once it is a proved success, our game is up.”

“That’s right. Confound that young cousin of mine. He’s checkmated me.”

“Not quite yet, Hank,” was the confident reply. “Even if we don’t get a chance to injure the ship or steal the plans, I’ve yet another scheme up my sleeve—a legal one.”