the "Hy" and Orissa sat beside him.
The motor boat attachment, which took the place of the ordinary running gear, was of sheet aluminum, as light and yet as strongly built as was possible for a thing intended to be practical. Adjustable wheels, which could be folded back when the boat was in the water, were placed on either side, to give the craft a land start. The huge engine was beautiful in appearance, while the planes – a crossed arrangement peculiar to the Kane Aircraft – were immaculately white in their graceful spread.
"This upper plane," said Steve, proud to explain the marvels of his latest mechanical pet, "is so arranged that its position may be altered by means of a lever. If you're on the water and want to save gasoline you adjust the plane as a sail and let the wind drive you."
"Clever! Very clever, indeed," observed Mr. Tupper. "I had no idea these flying machines had been improved so much since I last saw an aviation meet, some six months ago."
"The art of flying is still in its infancy, sir," replied Mr. Cumberford. "It is progressing with wonderful strides, however, and young Kane is one of those remarkable geniuses who keep a pace ahead of the procession."
Even as he spoke Steve started the engine, and as the first low rumble of the propeller increased to a roar the machine darted forward, passed the edge of the bluff and, rising slightly, sped over the placid waters of the Pacific, straight out from shore.
He did not rise very high, but half a mile or so out the aviator described a half-circle and then, as gracefully as a swan, sank to the surface of the ocean. Instantly a white wake of foam appeared at the rear of the boat, showing that the propeller was now churning the water. And now, with speed that to the observers appeared almost incredible, the Hydro-Aircraft approached the shore. A few yards from the bluff it abruptly rose from the water, sailed above the heads of the spectators, and after a circle of the field, came to a halt at almost the exact spot from which it had started.
This remarkable performance had taken place in so brief a space of time that those on the bluff had scarcely moved during the entire period. They now hastened forward to congratulate the inventor. Mr. Cumberford's grim features were for once wreathed in smiles; Chesty Todd capered like a schoolboy and flung his hat into the air as he yelled "Hooray!" while Sybil impulsively grasped Steve's hand in both of her own. As for Madeline Dentry, she eyed the young man wonderingly, asking herself if the marvel she seemed to have witnessed had actually occurred.
"Do you know," said Mr. Tupper, his voice trembling with excitement, "I wouldn't much mind a ride like that myself!"
Orissa was much pleased with this successful test of the new machine's powers. As the men wheeled the Hydro-Aircraft back to its hangar she turned to Chesty and said:
"I forgive you, sir. Really, you were too modest in your promises. Sybil and I will carry out your program to the entire satisfaction of the management and the public, I am positive."
"I can hardly wait for Monday, Ris," exclaimed Sybil. "If father wasn't so afraid, I would learn to navigate the Hy myself."
"Ah, you interest me, my dear," returned her father, blandly; "you do, really. But as your talents will never enable you to rival Orissa it will be well for you to curb your ambitions. I've conceded a lot, to allow you to go with her on that long jaunt Monday."
"You have, indeed," laughed Orissa. "But Sybil and I will have a real joy ride, and be perfectly safe in the bargain. How long a time will the trip take us, Steve?"
"Oh, a couple of hours, or so; it will depend on whether the current is favorable to your paddling back. In the air you can do forty miles an hour, easily."
"We will take some lunch with us," said Sybil. "Don't forget to order it, Daddy."
Mr. Cumberford nodded. Unimpressionable as this strange man seemed, his daughter was verily the "apple of his eye" and he was not likely to forget anything that might add to her comfort. Sybil's desire to aviate had been a constant source of disturbance to her father. He had worried a good deal over Orissa, during her first attempts to fly, but was now convinced of the girl's capability and, although he exhibited nervousness every time she gave one of her exhibitions, he had by degrees acquired supreme confidence in her skill. Still, being thoroughly experienced in all aviation matters, through his connection with the Kane Aircraft, Mr. Cumberford realized that flying is always accompanied by danger, and whenever an aviator met with an accident on the field he was wont to inform Sybil that on no account could she ever accompany Orissa again in a flight. He would even urge Orissa to abandon the dangerous work; but she answered him gravely: "This accident, as well as all others I ever heard of, was the result of carelessness and inexperience. The more flights I make the less liable am I to encounter accident. Perhaps I realize better than you do, Mr. Cumberford, the elements of danger, and that is the reason I am so careful to avoid every hazard."
Flying was an intoxication to Sybil. She never had enough of it and always complained to Orissa that their flights were of too short duration. Each time she was obliged to plead and argue with her father for days, before obtaining his consent to let her go, and even now, when he had given his reluctant permission to Chesty Todd to advertise Sybil as the companion of the Flying Girl, he was frequently impelled to forbid the adventure. His only consolation was that the new invention seemed very safe and practical, and with Orissa's guiding hands at the levers his beloved daughter would be as well guarded as possible under such conditions.
As a matter of fact, protests from Mr. Cumberford had little value, as Sybil possessed a knack of getting her own way under any and all circumstances. She had really no great desire to operate an aëroplane herself, being quite content to remain a passenger and enjoy the freedom of riding, untrammeled by the necessity of being alert every instant to control the machine.
Orissa, excusing herself, retired to the hangar to change her costume, and the young inventor was left to listen to the enthusiastic comments of his friends.
"When will your Hydro-Aircraft be on the market, Mr. Kane?" asked Madeline.
"In the course of the next three months we expect to complete two other machines," he replied.
"I want one of them," she said quickly. "Will you teach me how to operate it?"
"Of course," he answered. "That is part of the bargain. But you have not asked the price, and for all business transactions I must refer you to Mr. Cumberford."
"Madeline, my dear! My dear Madeline!" protested Mr. Tupper; "what in the world are you thinking of?"
"That I would give Mr. Cumberford a check at once," she calmly answered.
"But I – we – that is, I can't permit it; I – I really can't allow it, my dear!" asserted the gentleman, evidently alarmed by her positive attitude.
Madeline's slight form stiffened and her eyes flashed defiantly.
"Mr. Tupper," said she to her uncle, "do I employ you to advise me, or to manage my business affairs?"
That he was greatly humiliated by this attack was evident. His face grew red and he half turned away, hesitating to make reply. Then Mr. Cumberford came to Mr. Tupper's assistance.
"Your – eh – friend – is quite right, Miss Dentry; quite right to oppose your – eh – reckless impulse, if I may put it that way. Your enthusiasm interests me; it – eh – interests me greatly; but for your own welfare and the comfort of mind of your friends, I should advise you to – eh – curb your adventurous spirit, for the present. You have what is known as the 'Flying Fever,' which attacks the most conservative people when on the aviation field. Let it alone and it will dissipate, in time; but if you nurse it you – eh – buy a flying machine and become a slave. We have machines to sell, you know; we are anxious to dispose of all we can; but kindly keep your check for three months, and if at the end of that time you are still disposed to purchase, I will deliver the machine to you promptly."
"How can you do that? The demand will be greater than your ability to build the Hydro-Aircraft, after the exhibition of next Monday," she affirmed.
Mr. Cumberford regarded her thoughtfully.
"I believe you are right," said he. "Anyhow, I hope you are right. But I'll promise to reserve a machine, pending your decision. Young ladies