THE GATHERING OF THE MAN-BIRDS.

The aeroplanes—a dozen in all, that had been selected by various naval "sharps" from all over the widely distributed portions of the country for the weeding out of the best type—were quartered in a broad meadow not far from the town of Hampton. The locality had been chosen as removed from the reach of the ordinary run of curiosity seekers, who had flocked from all parts of the country to be present at the first tests of aeroplanes as actual naval adjuncts.

Sheds had been provided for the accommodation of each type. And above each shed was the name of the aeroplane it housed, printed in small letters. One of the first things that Mortlake and Fanning Harding proceeded to do on their arrival at this "bivouac" was to make a tour of the row of sheds in search of the Prescott machine. But to their joy, apparently, no shed housed it.

There were machines of dozens of other types, monoplanes, bi-planes, machines of the helicopter type, and a few devices based on the parachute principle. But no Prescott. The names the various machines bore were weird: The Sky Pilot, the Cloud Chaser, the Star Bug, the Moon Mounter, the Aerial Auto, the Heavenly Harvester, and some titles even more far-fetched graced the sheds, so that it was small wonder that in this maze of high-sounding names a shed at the far end of the row bearing the obscure title of Nameless missed the scrutiny of Mortlake and his aide.

"We've beaten them to a standstill this time," said Mortlake with intense conviction, "I feel that the Motor Hornet has the contest cinched."

The Motor Hornet was the name that had been bestowed on the machine which Roy had poetically dubbed the Silver Cobweb.

The shed of the mysterious Nameless was the only one of the long row that did not buzz with activity all that day, which was one assigned to preparation for the contests of the morrow. All the other aeroplane hives fairly radiated activity. Freakish-looking men hovered about their weird helicopters and lovingly polished brass and tested engines. The reek of gasolene and burning lubricants hung heavily over the field. Reporters darted here and there followed by panting photographers bearing elephantine cameras and bulging boxes of plates, for the metropolitan press was "playing up" the tests which were expected to produce a definite aerial type of machine for the United States Navy.

But even the most inquisitive of the news-getters failed to get anything from within the mysterious realms occupied presumably by the Nameless. Its roller-fitted double doors remained closed, and no sign of activity appeared about it.

This was conceded on all sides to be extraordinary, but all the speculation which was indulged in failed to elucidate the mystery.

"The Nameless is also the Ungetatable," joked one reporter as he and a companion passed by.

But if anyone had been about late that night, long after the aviators who had quarters at the hotels in town had quitted the field, he would have seen three figures—two girls and a boy, steal across the field from an auto which had driven up almost noiselessly, and unfasten the formidable padlocks on the doors of the Nameless's dwelling place.

This done they vanished within the shed for a short time, and presently thereafter a dark and strangely shaped form slowly emerged from the shed. It was the Golden Butterfly, and the trio of young folks were, as you have already guessed, Peggy, Jess and Jimsy. They crawled noiselessly on board, and a few minutes later, with a soft whirring of the propellers, the Butterfly shut down for precaution's sake to half speed, sped almost noiselessly upward.

The night was a calm one. Hardly a leaf was stirring and the stars shone like steel points in a cloudless sky. The aeroplane, after it had attained a few hundred feet, seemed to merge into the dark background of night sky. Unless one had known of its flight it would have taken a sharp pair of eyes to have discerned it.

"Say, this is glorious. It's like being pirates or—or something," said Jimsy enthusiastically, as soon as they had reached a height where they felt they could talk without difficulty.

"It's great after being penned up all day at that hotel," agreed Peggy, who was at the wheel, "how beautiful the stars are. Poor Roy, I wonder how he is getting along?"

"You know he was doing splendidly when we left, and he has our telegrams by this time," said Jess; "oh, Peggy, I'm so glad that the board of naval aviation said you could fly the Golden Butterfly."

"Oh, weren't they taken aback, though, at the idea?" chuckled Jimsy; "I thought that dignified old officer would fall out of his chair at the idea of a girl daring to run an aeroplane. I'll bet if there'd been anything in the rules about it, Peggy, they'd have barred you."

"I think so, too," laughed Peggy, "but, luckily, there wasn't. As Lieut. Bradbury pointed out, it was a case of an emergency. It isn't as if I'd tried to 'butt in,' as you say, Jimsy."

"Well, I'm sure I don't see why a girl shouldn't run an aeroplane just as well as a boy. You certainly showed that you could, Peggy, when you raced that train back in Nevada."

"In years to come," prophesied Peggy, "I dare say women as aviators will be as common as men. I don't see why not. Ten years ago a woman who ran an automobile would have been laughed at, if not insulted. But now, why lots of women run their own cars and nobody thinks of even turning his head."

"Hear! hear!" cried Jimsy, "I declare I feel like a lone man at a suffragette meeting."

"Then conduct yourself as if you were actually in that dangerous position," laughed Peggy.

The girl's spirits were rising now under the excitement of the night ride. On the advice of Lieut. Bradbury the party from Sandy Beach had kept closely to their rooms at the hotel all that day. It was at the officer's advice, too, that their shed had been labeled the Nameless.

"If Mortlake was, as I begin to think, concerned in these attacks on you," the officer had said, "I think it would be advisable not to appear any more than necessary. Let him think that you are out of the race."

Accordingly, the Butterfly had been transported secretly and placed in her shed at night. The secret had been well guarded and, as we know, neither Mortlake nor Fanning Harding had even an inkling that the Prescott machine was far—very far from being out of the race.

On and on through the night throbbed the Golden Butterfly, making fast time. At last they decided that it was time to return. The object of the trip, to see that all was in running order, had been accomplished. Nothing remained to do now but to wait for the morrow and what it would bring forth. The nature of the tests had been carefully guarded, and not one of the contestants knew anything about what they were to be till the hour came at which they would be announced from the judges' boat.

Suddenly, as they neared the environs of Hampton and the glare of electric lights could be seen on the sky, Jimsy gave a cry and pointed down below. They were flying pretty low, and in a road beneath them they could see an automobile. Its headlights shone brightly but it had stopped. All at once a sharp shout for help winged upward.

"Hullo!" exclaimed Jimsy, "somebody's in trouble down there. Maybe we'd better descend. That is, if you girls aren't scared?"

"Um—well," began Jess, but Peggy interrupted her:

"Jess Bancroft, I'm ashamed of you. It's our duty to help out if we can."

"At least if it gets too hot we can always retreat," muttered Jimsy.

Under the covering of one of the lockers was a revolver. Under Peggy's directions Jimsy found it. The next moment they were descending rapidly. With hardly more noise than an alighting night bird, they dropped into the lane in which the auto was stalled. As they touched ground the sound of harsh voices caught their ears:

"Shell out now, if you don't want to be half-killed!"

"Yes, come on. Hand over your coin, or it'll be the worse for you," chimed in another ruffianly voice.

"Good gracious!" gasped Jess, "it's a hold up!"

But now another voice came through the darkness.

"I suppose you fellows know that you are breaking the law and in danger of imprisonment if you are caught?"

"Now, what is there that's familiar about that voice?" puzzled Peggy, racking her brains.

"Aw, don't preach sermons to us, boss," came one of the gruff voices, "we needs the money and we ain't particular how we gits it, see. Fork over now, or——"

The sentence was never completed. There was a sudden flash and a sharp report. The man in the automobile had defended himself apparently, for there came the sound of a heavy body falling, and then his voice:

"I hope I haven't hurt you badly; but you brought it on yourself, as your companion can witness."

The next instant, and just as Jimsy sprang forward from the clump of brush at the roadside which had hitherto concealed the aero party—there came a heavy rush of feet toward them. A dark form, running pantingly, appeared.

Jimsy, with a dexterous outward thrust of his foot, tripped the fleeing man, who came down heavily in the center of the road and started howling for mercy.

In the meantime, the occupant of the automobile had climbed down, and detaching one of the lamps, examined the wounded man lying in the road beyond Jimsy's capture. As the rays of his light swung to and fro they hovered for an instant on Peggy's white, strained face leaning forward above Jimsy's prisoner, upon whose neck the redoubtable young Bancroft was now sitting.

"Miss Prescott, by all that's wonderful!" came an amazed voice.

There was no mistaking that bold, straightforward voice now. It was James Bell, the mining magnate and their kind friend.

"Oh, Mr. Bell," cried Peggy, half hysterically, "we're so glad you've come!"