"I've known him to do lots of mean things," spoke up Elephant, promptly; "and if I had to enter a race with him I tell you right now I'd keep out of his reach, all right."

"The best way is to get the lead in the start, and never let him come within striking distance. Then you could snap your fingers at his games," declared Larry.

"Say, there is something in that, Frank," Andy admitted.

"I believe it," returned the other young aviator. "The only trouble I can see is that Percy usually starts off with a furious rush, and takes the lead. He believes it gives him an advantage, and perhaps it does. Every fellow has his pet theories in a race, and no two of them may be alike."

"I guess the main idea with him is that he can get in some of his dirty work if he sees the other is passing him," Andy sneered.

Frank shook his head at him; but on the whole did not know that he could blame Andy for feeling so bitterly toward the other. Their experiences with Percy in the past had been far from pleasant; and many times had he attempted some unscrupulous game that had stirred Andy's fighting blood to the boiling point.

As for Sandy Hollingshead, Andy's opinion of him as a sneak was known to every boy in Bloomsbury; nor did the party most interested seem to care to knock off the chip aggressive Andy had long carried on his shoulder.

The aeroplane had vanished beyond the high fringe of trees. Possibly Percy had headed for town to show off his new purchase to the gaping Bloomsbury crowds, certain to come rushing from houses and stores as soon as the word was passed around that a flying machine was hovering overhead.

As the afternoon passed, the boys debated pro and con concerning the challenge. Frank had agreed to accept, much to the delight of the others, and his answer was carefully prepared, so as to cover every point in question.

He and Andy realized that after all, their prediction as to a storm had failed, for the clouds seemed to have passed away, leaving the day hotter than ever.