poignant. Assured of her girl's skill and coolness, the mother had come to accept these occasions philosophically, as far as the danger was concerned, and she was naturally interested in Steve's inventions and overjoyed at the financial success which Mr. Cumberford's business ability had already insured the firm.
This Sunday evening Orissa wrote a long letter to her mother, telling how perfectly her brother's new machine worked, and assuring Mrs. Kane of her confidence in winning new laurels for Stephen on the morrow. "The latest engine, made for the Hy, is more powerful than were the others," she added, "but its operation is practically the same and while the combination of boat and aircraft necessitated a more complicated arrangement of the control, I have easily mastered all the details and could take the whole thing apart and put it together again, if obliged to do so."
The girl slept peacefully that night and neither she nor Sybil were in the least nervous when they went to the aviation field, overlooking the sea, after an early luncheon on Monday.
They found the Kane Hydro-Aircraft reposing majestically in its hangar, in perfect order and constantly surrounded by a group of admiring and interested spectators. The little band of professional aviators present at the Meet welcomed Orissa very cordially, for every one of them knew and admired the brave girl who had so often proved her ability to manage her brother's machines.
The grand stand was packed with spectators, and long rows of automobiles lined the edge of the enclosure reserved for the exhibitors.
The "Kane Event," as it was called, was early on the program of the day, for it was understood that the flight over the ocean and the voyage back would consume much of the afternoon. Many had brought binoculars and other powerful glasses to watch the Flying Girl and her chum during their progress.
Sealskin Island lay a little to the south of the aviation field and was one of a group of barren rocks jutting out of the sea and plainly visible from the mainland. The Coronado Islands, which have little or no value, belong to Mexico, as the Mexican boundary is only twelve miles south of San Diego, and this group, although not appearing to be so far south, is below the line claimed by the United States. Therefore Orissa's flight would be in a southwesterly direction and most of her journey made in plain view of every spectator.
As the "Hy" was run out to the center of the field Steve said to Orissa:
"I've anchored an aluminum chest just back of your seats, at the suggestion of Mr. Cumberford. In it are all the tools you could possibly need in case of emergency, a couple of warm blankets to use if your return trip proves chilly, and enough 'lunch' – which I think Sybil pleaded for – to last you both a week. The chest enables you to carry all this safely and comfortably, and it won't be at all in your way. Personally, I think such a precaution wholly unnecessary, but Mr. Cumberford is a good deal of an old woman where Sybil is concerned and it is easier to give up to him than to try to argue him out of an idea. Take the trip easy, Ris; we don't need to make time. What we want to demonstrate is the practicability of the machine, and we ourselves already know that it is thoroughly practical, and we therefore ought to be able to convince the world of the fact."
Orissa nodded.
"How about gasoline?" she asked.
"Both tanks are filled. There's enough to run you a hundred miles in air and fifty miles in water, which is far more than you will require. Be gentle with the steering gear; it is such a long connection that it doesn't respond as readily as the old one, and I guess I've made the rods a trifle too light. I mean to rig up a more substantial device as soon as I get time, but this will do you all right if you don't jerk it. Put a little more strength to the wheel and turn it gradually, that's all."
"I understand," she replied. "Are you ready, Sybil?"
"Waiting on you, Ris."
"And I think the crowd is waiting on us."
The band was at this moment playing its loudest and most stirring tune and as the two venturesome girls, dressed in appropriate aërial costume, appeared on the field, wildly enthusiastic shouts rose from ten thousand spectators. Chesty Todd had decorated the braces of the machine with bunches of fresh violets and the aluminum and nickeled parts shone gloriously in the sun.
"Be good, Sybil," said Mr. Cumberford. "Take care of her, Orissa."
The girls laughed, for this was the old gentleman's customary parting warning.
"All right, Ris," said Steve.
She applied the power and one of the mechanicians gave the propeller a preliminary whirl. Then Orissa threw in the automatic clutch that started the machine and it ran forward a few feet and promptly rose into the air. A moment later it was speeding straight out to sea, at an altitude of a hundred feet, and the wonderful voyage of Stephen Kane's new Hydro-Aircraft was begun – a voyage destined to vary considerably from the program mapped out for it.
CHAPTER IV
THE ALUMINUM CHEST
Orissa realized quite perfectly that Sealskin Island was much farther away from the mainland than it appeared, so on leaving the shore she pursued a direction straight west for several miles, intending to make a turn and proceed south to the island which was the terminus of her flight. That prolonged the trip somewhat, but she figured it would prove more interesting to the spectators, since for a part of the journey she would be flying parallel with the coast. On the return she planned to run straight back from the island.
When she decided they had reached a point about as far out as was the island, she attempted to make the turn – a mere segment of a circle – but in spite of Steve's warning Orissa was surprised at the stiffness of the steering gear. The engines were working beautifully and developing excellent speed, but the girl found she must apply all her strength to the wheel to make the turn.
She succeeded, and brought the head to bear directly upon the island, but the gear grated and stuck so persistently that Orissa's effort sent the entire craft careening at a steep angle. Sybil gave a gasp and clung to the supporting rods and both girls heard a loud "chug" that indicated something was wrong; but the Kane balancing device was so perfect that almost immediately the machine righted itself and regained its equilibrium, darting swiftly and in a straight line in the direction of the island.
"What was it?" asked Sybil, putting her head close to Orissa's to be heard above the whir of the motors behind them.
"The steering gear binds; that's all," was the quiet response. "I think it will work better when we are in the water."
"But what made that noise? Didn't something give way?" persisted Sybil.
"Glance behind us, dear, and see."
Sybil carefully turned so as to examine the parts of the aëroplane.
"Oh!" she exclaimed.
"Well?" said Orissa.
"That chest that Steve loaded us with. It has broken away from its fastenings and is jammed edge downward against your gear."
Orissa thought about it.
"That's unfortunate," said she. "I suppose the bolts broke when we tipped so badly. But it hasn't interfered with our engines any."
"No," answered Sybil, still examining the conditions; "but it has interfered seriously with your control, I fear. Both your levers are thrown out of position and even the front elevator bars are badly bent."
For the first time a worried expression appeared on Orissa's face.
"If
