Even Tubby had to laugh at that highly colored supposition.

“Well, one thing sure!” he exclaimed, “I wouldn’t have to beg pardon for squashing him.”

“But think of the mess,” chuckled Andy.

“Watch that man who has just gone up in a monoplane. He’s the best there is on the Coast, next to Beachey himself, who is a native of California. You’ll see him turn flip-flaps to beat the band presently. Why, I’ve watched him go around twice, and as neat as a circus tumbler would do it off a springboard over the backs of three elephants. There he goes! What d’ye think of that?”

“Whew! he’s a corker, for a fact!” ejaculated Tubby, as he stood with open mouth, gaping at the wonderful exploits which the reckless air-pilot was engineering far up above the earth.

Rob, chancing to turn toward the stout boy, saw to his amusement that there was something of a wistful expression on his rosy face. Tubby could at least feel the charm that this hazardous sort of life might possess for venturesome boys, even though he knew he could never hope to attain any standing in the ranks, owing to what Andy had well called “physical disabilities.”

Athletes alone make good air-pilots, and a fellow who had the shape of a tub would only be useful as an anchor, or something like that.

Poor Tubby! It did seem that Fate was cruel to him, since he was debarred from taking an active part in so many sports such as boys enjoy. But Nature had at least given him a cheerful disposition, so that no matter how keenly disappointed he might be, he never allowed this to sour his temper.

They stood there and watched the trick aviator doing what Hiram called “stunts.” Sometimes the boys fairly gasped with sudden fear lest the man aloft had made a miscalculation, and would come plunging down like a stone to his death; but his agility and quick wit always served him faithfully.

“Some of these fine days something will happen that he doesn’t count on,” Rob said, soberly, “a flaw may develop in some part of his machine, just where it counts the most; and then—well, it will be his finish.”