“Why, Hiram,” spoke Dave, “you seem to have quite set your heart upon it.”

“Indeed I have!” vociferated the impetuous Hiram. “Think I’m going to sit around and keep mum, and hear a lot of would-be-airmen brag? Not much! They boast about a heap of records I know they never made. They were talking about this very prize offer last night. I took a good deal of pride in telling them about some of the things you’ve done. They knew about most of them, though. They looked glum when I hinted that you were going in for a try.”

“You shouldn’t have done that,” said Dave, quickly.

“Shouldn’t—why not?”

“Because in this line the wise man keeps his business to himself. Airmen, generally, are a jealous lot. Some of them, as we have reason to know, are untrustworthy.”

“I never thought of that,” replied Hiram, his face growing serious. “You’re right! It wouldn’t be the first time some schemers got after you, and tried to block you. That’s so! All the same, with that new Ariel, biplane, made specially for you, who can beat you? Why, Dave, your little trailer, the Scout, alone has half a dozen speed points ahead of the average machine on the field here. Those new release gears are just dandy, and there isn’t a craft on the list that has such an engine as the Ariel, let alone the fuselage angle rods and the tubular framework.”

“I declare, Hiram,” laughed Dave, “you’ve been posting up on scientific details lately; haven’t you?”

“I’ve tried to get it pat, yes, I’ll admit,” assented Hiram proudly. “Then again, I’ve had a motive in view. You see, I’ve been thinking up a grand scheme—”

Hiram came to a sudden stop, looked embarrassed, and there was a faint flush on his face. It was with a somewhat sheepish expression in his eyes that he glanced at his companion.

“I know what you’re hinting at,” observed Dave shrewdly. “I suspected you were up to something when I saw you working over those little canvas bags. What’s the mystery, Hiram? Going to tell, this time?”