The aviator turned to him gratefully.

“Thank you,” he said; “I’ll put my machine in your hands. What experience have you had with biplanes of this type?”

“None at all,” was the answer; “but I am sure you will not find an experienced airship man in this city. I’ve studied the devices, though, ever since Montgomery made his first flights, and as we have all the requisite tools and machinery here I am sure, with your assistance and direction, I can readily put your machine into perfect condition.”

He did, performing the work excellently. Before long another biplane needed repairs, and Stephen was recommended by Mr. Willard. Later a Curtiss machine came under Steve’s hands, and then an Antoinette monoplane. The manager raised the young fellow’s salary, proud that he had a man competent to repair these new-fangled inventions which were creating such a stir throughout the country.

Stephen Kane might have continued to follow the calling of an expert aëroplane doctor with marked success, had he been an ordinary young mechanic. But the air castles he had built at college were not all dissipated, as yet, and aside from possessing decided talent as a workman Steve had an inventive genius that promised great things for his future. By the time he had taken a half dozen different aëroplanes apart and repaired them he had a thorough knowledge of their construction and requirements, and the best of them seemed to him wholly inadequate for the purpose for which they were planned.

“The fact is, Ris,” he said to Orissa one evening, after he had been poring over a book on air currents, “the airships of to-day are all experimental, and chock full of mistakes. No two are anywhere near alike, and each man thinks he has the only correct mechanism.”

“But they fly,” answered the girl, who was keenly interested in the subject of aviation and had twice been down to the shop to examine the aëroplanes Steve was repairing.

“So they do; they fly, after a fashion,” admitted the young man, “which fully proves the thing can be accomplished. But present machines are all too complicated, and the planes seem to have been shaped by guesswork, rather than common sense. They fuss with motors and propellers and ignore the sustaining mechanism, which is the most vital principle of all. Some day we shall see the sky full of successful aviators, and flying will be as common as automobiling now is; but when that time comes we shall laugh at the crude devices they brag of to-day.”

“That may be true,” returned the girl, thoughtfully; “but isn’t it true of every great invention, that the first models are imperfect?”

“Quite true,” said he. “I can make a better biplane than any I have seen, but I admit that had I not had the advantage of seeing any I might have blundered as all the rest seem to have done.”