Rob and the other boys were not quite so fortunate, but being within easy hearing distance, they believed they would not be apt to miss anything that went on.

They saw Hiram put out his hand and give a tug at the coat of the fine-looking gentleman with the white military mustache. The latter looked down and was apparently annoyed to see that it was only a youth who sought to distract his attention.

“What do you want, boy?” he was heard to ask, impatiently.

Then Hiram spoke up. If his voice quavered a little that was not surprising; indeed, in Rob’s mind the wonder was that the excited scout could find his tongue at all.

“Do you think, Mr. Curley, that the little stabilizer has proved to be all that was claimed for it, sir?” was what Hiram asked.

The gentleman stared hard at him. Others who heard his question did the same, and Rob saw a smile as of amusement appear on the bronzed face of the noted air-pilot who had just come down, after experimenting with the device, bringing a favorable report; it was as though he had begun to smell a rat, and realized what a joke it would be to have a boy invent such an important appendage to a heavier-than-air flying machine.

“Why, what business is that of yours, may I ask, boy?” demanded the business head of the big company, as he continued to stare at the eager, flushed face of the lad who wore the khaki of a Boy Scout.

“Oh! Because I happen to be the Hiram Nelson you’ve been corresponding with, sir, that’s all!” said Hiram. “I used the money you sent me to come out here, but was a leetle bit afraid to face you. But I guess it’s all right now, Mr. Curley, because I heard your pilot say the thing worked fine. That suits me; and I’m ready to talk terms with you right away!”

CHAPTER XXIV.
A BOY SCOUT’S TRIUMPH.

“What’s this you are telling me?” asked Mr. Curley, quickly. “Have you the proof of what you claim with you, young man?”