The rat-tat-tat of gunfire suddenly ceased. Jack could no longer cover the spot where the two Huns were hiding behind the tree-trunks, and consequently it would be a sheer waste of ammunition to continue firing.

But already Tom had commenced to circle, and soon they would be swooping down upon the scene from another direction. Jack kept on the alert, so as to note quickly any possible movement of the enemy.

Again he poured a hot fire on the place where he knew the Germans were cowering, tearing up the ground with a storm of bullets as though it had been freshly harrowed. But the sturdy trees baffled him once more.

"Nothing doing, Tom!" he called out, vexed. "We've got to drop down and go it on foot if we want to save that pilot!"

"I see a good landing place!" announced the other almost instantly.

"Great luck! get busy then!"

The ground chanced to be unusually smooth, and the plane, after bumping along for a short distance, came to a stand. Meanwhile, both young fliers had succeeded in releasing themselves from their safety belts.

Together they jumped to the ground and started on a run toward the spot where those crouching figures had last been seen. Of course, the Huns must already know of their landing and would be ready to defend themselves, if not to attack; but, nothing daunted by this possibility, the pair pushed ahead through bushes and past trees.

"Better separate, and attack 'em from two different angles, hadn't we, Tom?" panted Jack presently, as a shot was heard and something clipped a twig from a bush within a foot of his hand.

"Take the left, and I'll look after the right!" snapped out Tom.

Both were armed with automatic pistols, for airmen can never tell when their lives may depend upon their ability to defend themselves, and so seldom make a flight without some such weapon in their possession.

"They're on the run!" cried Jack, in a tone of disgust; for he had really hoped to have a further brush with the skulking enemy.

He sent several shots in their direction whenever he caught glimpses of the bounding figures, but without much hope of striking either of them. Still, they had undoubtedly accomplished the business in hand, which was to save the Yankee pilot.

"He's over this way, Jack," observed Tom, moving to the right still further, after being joined by his comrade. "I can see the opening where he must have struck. The Hun flier didn't bother to follow him down and find out if he'd made a count. He may have been here for some time."

"I see him now," continued Jack eagerly. "And it strikes me there's something familiar about his looks. Yes, we've met that pilot before, Tom. It's Lieutenant Colin Beverly, one of the cleverest Yankee aces of the newer squad."

The aviator had already discovered the Air Service Boys' presence. Doubtless all that had occurred had been noted by him as he sat, waiting for anything that might happen; and the swoop of the American plane, as well as Jack's firing, had of course told him help was near.

"He's waving his hand to us," continued Jack, answering in kind.

"Keep your gun ready for business," warned the other, inclined to be more cautious. "There may be other Huns prowling around, because we're not far from their lines, you understand."

A minute afterwards they reached the pilot of the wrecked bomber.

"Hello, fellows!" was his familiar greeting, as he thrust a hand out toward them. "Glad to see you, all right. They were after me, just as I suspected. My observer was wounded in the arm, but went for help. As for me, save for a few scratches, I made the fall in great luck. But I'm still crippled from that other accident. Just got out of hospital a week ago. They tried to keep me from going up, but I'd have died only for the permission."

Colin Beverly they knew to be one of the liveliest fliers then serving in the American ranks. He had gained a name for daring second to none. Early in his service he had won a reputation, and was already a double ace; which meant that he was officially credited with at least twelve victories over enemy fliers.

Tom and Jack had met him a number of times previously, and there had always been a strong attraction between the three. Lieutenant Beverly was one of fortune's favorites in so far as worldly riches went, since he had a million at least to his credit, it was said.

He had enlisted as soon as the United States entered the war, and had chosen aviation as his branch of the service, since it offered his venture-venturesome, almost reckless, spirit a chance for action. He had had numerous escapes so narrow that his friends began to believe some magical charm must protect him.

As he had mentioned when speaking to them on their arrival, his closest call had sent him to the hospital with a fractured bone in his left leg; and even when discharged as cured he really should not have returned to the harness; only, those in authority found it difficult to keep such an energetic soul in check.

"Those chaps will come back with more of their kind, I reckon," Tom remarked. "They've made up their minds to get you, Lieutenant, and when a Hun is bent on a thing he keeps on trying. We can take you along with us."

"I hate to desert the bus," complained the other, giving his wrecked plane a wry look. "But then what's the use of sticking it out? Chances are we'll be through the mess before they ever get it in fighting trim again. Yes, I'll go along, boys, if you'll lend me a shoulder. Gave that game leg another little knock in falling; but then, I might have broken my neck, so I'm thankful."

"The Beverly luck again!" chuckled Jack, at which the intrepid flier nodded with kindling eyes.

"Getting to believe I can carry anything through I care to tackle, for a fact, fellows," he remarked, with the same amazing confidence that had taken him along so many times in a whirlwind of success.

They ranged alongside, and he leaned on Tom's arm as he limped off, giving no further heed to the mass of damaged engine, crumpled wood, bent steel guys, and torn canvas that had once been a powerful bombing plane.

Jack kept in readiness to meet any attack that might spring up, though they had reason to believe the Huns had temporarily withdrawn from the field of action.

"Your friend Harry Leroy dropped in to see me while I was laid up, Raymond," remarked the lieutenant, with a broad grin, as he saw how his words caused the color to flash into the bronzed cheeks of the other.

"Haven't seen Harry for some time," Tom replied, his eyes twinkling with pleasure; "but I heard of you through his sister. Nellie said you were the hardest patient she'd ever tackled, because you kept fretting to get out and be at work again."

"Yes, Miss Leroy was my nurse for a week, and I think I improved more under her care than at any other time. She's a fine girl, Raymond."

"Sure thing, Lieutenant. I ought to know," came the unabashed answer. "I've known Nellie for some time, and that was always my opinion. We're good friends all right."

"H'm! I guess you must be," chuckled the other. "I wish you could have seen her look when I mentioned that I knew you well, and liked you in the bargain. I kept talking Tom Raymond a full streak just to watch the blushes play over her face and the light shine in her eyes. Raymond, you're a lucky dog."

"Here's our plane, and we'll soon be able to get going with such a smooth bit of ground ahead," Tom hastened to remark, though it was easy to see that what the other said had thrilled him.

"All aboard!" sang out Jack, after a last quick look around. "No Huns in sight, as far as I can see."

The ascent was easily made, for, as Tom had said, they were favored with an unusually level stretch of ground beyond, over which the plane rolled decently until the pilot switched his lever and they started to soar. From some place close by an unseen enemy commenced to fire again, but without success.

Once fully on their way, the danger faded out of sight. Again they were spinning through space, with the earth fading below them.

"Back home, Tom?" called out Jack, and the pilot nodded an affirmative.

Swiftly they sped, and presently were dropping back to earth at the spot whence their outgoing flight had started. Here there were evidences of bustle, with planes coming and going all the while. Couriers could be seen on horses or motorcycles speeding away with important news to be sent from the nearest field telephone station in touch with division headquarters.

The landing was made without incident, though curious glances were cast in their direction. Many knew that Tom and his chum had made their ascent without a third passenger, and the presence of Lieutenant Beverly announced that some sort of tragedy of the air had occurred.

A number of other pilots swooped down upon them to learn the particulars.
As usual they were inclined to be jocular, and greeted the limping
Beverly with a volley of questions, as well as remarks concerning that
"luck" of which he had talked.

"They can't get you, no matter how they try, Beverly," one called out.

"Another machine to the scrap-heap!" laughingly observed the most celebrated of Yankee aces, slapping Colin on the shoulder. "Makes an even dozen for you I understand. Planes may come and planes may go but you go on forever. Well, long may you wave, old chap! Here's wishing you luck. So the boys picked you up, did they? Nice work, all right."

"Just in time, too," confessed Beverly, "because there were some Huns on the way to finish me that had to be chased off."

Tom had been noticing something which he thought a bit strange. It was a way Lieutenant Beverly had of looking at him curiously, as if deciding something in his mind which had suddenly gripped him.

"Is there anything else we can do for you, Lieutenant?" he finally asked, when they had left the bevy of pilots and mechanics behind and were heading toward their quarters; for Tom wished to see the other comfortable before he and Jack ascended once more.

"I don't believe there is—at present," the other slowly replied. "But this accidental meeting may develop into something worth while; that is, if you chaps would care to join me in a sensational flight."

At hearing these words Jack began to show a sudden interest.

"If you know anything about us, Lieutenant!" he exclaimed eagerly, "you ought to understand that we've always been willing to tackle any job coming our way."

"This one," continued the other gravely, "promises to be an unusually dangerous enterprise that if successful, will be sure to win the crew of the big bombing plane tremendous honors and perhaps rapid advancement."

"You're only exciting us more and more by saying that," said Tom. "Suppose you explain what it is, and then we could decide whether we'd want to join you or not."

"My sentiments exactly," added Jack.

Lieutenant Beverly looked from one face to the other. He seemed to be mentally weighing the chances of his ever being able to run across two more promising candidates for the honor of sharing his secret than the pair of ambitious lads then in touch with him. As though his decision was taken he suddenly exclaimed:

"It's a go, then! I'll let you into my little secret, which so far hasn't been shared by a single living man. Then later on you can decide if you care to accept the risk for the sake of the glory success would bring, as well as striking a blow for the flag we all love!"