Andy was watching keenly when the Carberry boy walked back to his machine, and climbed into the steering seat. Frank, happening to look that way, saw his cousin's face lighted up as if in glee: and he even heard him chuckle. Perhaps Percy may have caught the same sound, for he turned his head after dropping down into his seat, and scowled darkly at Andy. There is nothing like a guilty conscience to bring about a self-betrayal; and somehow Percy seemed to know what the Bird boy was thinking about just then.
At any rate, he was an adept at the pilot wheel of a car, though inclined to be a reckless driver; just as he was also a daring air voyager, taking desperate chances that promised to bring him to grief one of these days.
Backing the car swiftly around, he sped away. Sandy Hollingshead, who had not once moved from his seat, or uttered a single word all the time, turned his head to look back; and Andy thought he too scowled darkly, as though stirred by unpleasant thoughts; but in another minute they had vanished around the bend far along the pike, and the Chief alone was seen, whipping up his nag, in the endeavor to get back as speedily as possible to Headquarters.
"Well, of all things, don't this just take the cake?" remarked Andy, when he and his cousin once more found themselves alone beside the motionless aeroplane, that nestled like a great bird on the grass close to the road.
"It certainly looks as though we might be in for a little more excitement," replied Frank; "but what seemed to make you chuckle so much, Andy? You must have noticed something that escaped my attention, because I was busy thinking of other things. Suppose you open up, and tell me?"
"I was tickled half to death to see how Percy tried to walk, as if nothing was the matter with him, when all the time he couldn't keep from limping; because, don't you see, one or several of those bird-shot Felix scattered around last night, must have stung him about the legs. That's why he scowled so at me, Frank!"
CHAPTER VII
THE AIR SCOUTS