across the Atlantic and the possessor of a small fortune in prize money, his first task was to hunt up the schemer, Vernon. Dave gave the rascal to understand that if he annoyed Elmer any further, he would find himself in serious trouble.

For all that Dave Dashaway and the powerful friends he had made did, however, Vernon was slow to abandon his hope of fleecing his victim out of more money. He tried to blackmail Mr. Brackett, and even brought a suit against the wealthy manufacturer on some notes he had induced the son to sign under false pretences. To get rid of him, Mr. Brackett had finally given Vernon a sum of money to cease his annoying persecutions. Then Vernon had disappeared, and Dave had supposed that he was “off the map” for good.

Elmer had acted like a new being since coming under the healthy influence of the brisk, high-minded young airman, Dave Dashaway, and his ardent assistant, Hiram Dobbs. For the first time in his life, the zest of adventure and the ambition to make something of himself had acted like a spur on the young fellow.

For over a month our hero, Dave, and his two loyal comrades had led an existence of delight. The young airman had become greatly interested in an exploit in which he had been invited to take part. The National Aero Association had arranged for a wonderful novelty and a test in the aviation field. This was nothing less than an aeroplane race around the world.

The route had been marked out, the prizes announced and the rules of the contest adopted. Nearly half a score of contestants had registered. In the official list there had been published a line or two that the adventurous Hiram read proudly a dozen times a day: “Entrant VI—the biplane Comet, pilot Dave Dashaway.”

An aero meet was now in progress near the city of Washington, which was to be the starting point of the great race. Dave and his young assistants had fairly lived at the plant of the Interstate Aero Company. Every facility of the great factory had been placed at the command of Dave. The result had been the construction of the Comet, probably the most perfect and splendid aircraft ever built.

There was a permanent aero practice field near the factory, and on the afternoon when our story opens the Comet was ready to make its daily trial flight. With the morrow, entirely equipped and its crew aboard, the model biplane was to sail across the country for Washington, to be on hand for the start of the race around the world a few days following.

Other skycraft were in practice or motion about the field. Hiram and Elmer had gotten their machine in order for a non-stop flight of one hundred miles. They were waiting for the arrival of Dave, when Hiram made the discovery that upon the very eve of their grand and stimulating star exploit, an old enemy had suddenly appeared upon the scene.

Hiram Dobbs bent a keen, suspicious glance at the three men whom he had pointed out to his comrade. A worried look came into Elmer’s face as he, too, watched them.

“Yes,” said the latter in an uneasy tone, but convincedly, “one of those men is Vernon.”

“And the others are a lawyer and an officer of the law,” added Hiram. “There’s something afoot, Elmer. I guess what it is and—I’ll fool them.”

“The constable is coming this way!” exclaimed Elmer, apprehensively.

“He won’t get here quick enough,” declared Hiram. “I see through their tricks—Vernon is bent on having you arrested on some flimsy charge. The scoundrel counts on the belief that your father will pay him more money rather than see the Comet delayed for the race. We’ll disappoint him.”

The speaker