Nellie Leroy rose from, the chair where she had been sitting, and stood before the little party of her friends, gathered in the little Paris apartment where Bessie Gleason and her mother made their home when they were not actively engaged in Red Cross work. The sister of the captive airman had a quiet but very determined air about her.

“That is what I am going to do,” she said, as no one at first answered what had been a dramatic outbreak. “Perhaps you will tell me best how to go about it,” and she turned to Tom and Jack. “You know something of the German lines, and where I can best go to give myself up.”

“Why—why, you can't go at all!” burst out Tom.

“I can't go?”

“No, of course not. You mean all right, Nellie,” went on the young man, “but it simply can't be done. To give yourself up to the Germans would mean for yourself not only—Oh, it couldn't be done!” as he thought of the cruelty of the Huns, not only to the soldiers of the Allied armies but to helpless women and children. “You couldn't give yourself up to those brutes!' he cried.

“To save my brother I could,” said Nellie simply. “I would do anything for him!”

“I know you would,” murmured Bessie.

“But it would just be throwing yourself away!” exclaimed Jack, coming to the help of his chum, who was gazing helplessly at him in this new crisis. “Tell her, Mrs. Gleason,” he went on, “that it is utterly impossible, even if the army authorities would let her. Even if she should give herself up to the Germans, they wouldn't keep any agreement they made to exchange her brother. They'd simply keep both of them.”

“Yes, I think they would,” said Mrs. Gleason. “It is out of the question, my dear,” and gently she laid her hand on the girl's shoulder. “That is very fine and noble of you, but it would be wrong, for it would not save your brother, and you would certainly be made a prisoner yourself. And of the horrors of the German prison—at least some where the infantrymen have been kept, I dare not tell you. I imagine it must be better where the airmen are captured,” she went on, for she feared that if she painted too black a picture of what Harry might suffer his sister would not be held back by anything, and might sacrifice herself uselessly.

“But what am I do?” asked Nellie, helplessly. “I want Harry so much! We all want him! Oh, isn't there something? Can't you save him?” and she held out her hands appealingly to Torn and Jack.

There was a moment of silence, and then Tom burst out with:

“Well, I may as well speak now as later, and I'll tell you what I've made up my mind to do. Yes, it's a new plan I've worked out,” he went on, as Jack looked at him curiously. “I haven't told even you, old man, as it wasn't quite ready yet. But it's a scheme that may succeed, now that we know definitely where Harry is, from what the German patrol said. He isn't so far away as when we dropped the packages in the prison camp, though we don't yet know that he was there at the time we did our stunt. However, if this new plan succeeds we may have a chance to find out.”

“How?” asked Nellie, eagerly.

“By talking to Harry himself.”

“How are you going to do that?” demanded Bessie.

“What kind of game have you been cooking up behind my back?” asked Jack.

“As desperate as the other, I guess you'll call it,” answered Tom. “But something has to be done.”

“Yes, something has to be done,” agreed Jack. “Now what is it?”

Tom arose and went to the door. He opened it, looked carefully up and down the hall, evidently to make sure no one was listening, and then came back to join the circle of his friends.

“I'm going to speak of something that very few know, as yet,” he said, “and I don't want to take any chances of its getting out. There may be German spies in Paris, though I guess by this time they're few and scattering.

“I'm not going to tell you how I know,” he said, “but I do know that soon there is to take place a big battle—that is, it will be big for the American forces that are to have part in it. There has been a conference among the Allied commanders, and it has been decided that it's time to teach the Germans a lesson. They've been despising the American troops, as they despised General French's 'contemptible little army,' and General Pershing is going to show Fritz that we have a soldier or two that can fight.”

“You mean there's to be a big offensive?” asked Jack.

“No, I wouldn't go so far as to call it a general engagement like that. It's to be kept within the limits, of the sector where the United States troops are at present,” said Tom. “That is where you and I are located, Jack, and that, as you know, is almost opposite the prison where Harry and the others are confined.”

“I begin to see what you are driving at!” cried Nellie, her eyes shining. “But are you sure of this?”

“Yes,” went on Jack, “how did you bear of this when it's supposed to be such a secret?”

“It came to me by accident,” said Torn, “and I wouldn't speak of it to any one but you. Soon, however, it will be more or less public on our side, as it will have to be when we start to get ready. But it's to be kept a secret from Fritz as long as possible. It's to be a surprise attack, and if it doesn't develop into a big battle it won't be the fault of Uncle Sam's boys.”

“Will the air service have any part in it?” asked Jack eagerly, as if fearing he might be left out.

“I don't see how they can get along without us,” said Tom. “Not that we're the whole works, but it is well established now that an army can't fight without the use of aeroplanes, to tell not only what the other side is doing, but also how our own guns are shooting. Oh, we'll be in it all right!”

“When?” asked Jack.

“That I can't say,” replied his chum. “But now to get down to the thing that concerns us, or rather, Harry. I have a scheme—and you can call it wild if you like—that when the battle is going on, you and I, Jack, and some other airmen if we can induce them to do it, and I think we can, may be able to drop bombs near the prison camp. We'll have to judge our distances pretty carefully, or we'll do more harm than good. Then, if all goes well, and we can blow down some of the camp walls or fences, and if the battle favors our side, we can make a descent on enemy territory and rescue Harry and any others that are with him. What do you think of that plan?”

“It's wonderful!” exclaimed Nellie, glaring at Tom with a strange, new light in her eyes.

“It's very daring,” said Bessie, more calmly.

“It's crazy!” burst out Jack

“I thought you'd say that,” commented Tom calmly, “and I'd have been disappointed if you hadn't. And just because it is crazy it may succeed. But it's the only thing I can think of. Daring will get you further in this war then anything else. You've got to take big chances anyhow, and the bigger the better, I say.”

“I'm with you there all right,” agreed Jack. “But to land in hostile territory—it hasn't been done ten times since the war began, and have the aviator live to get away with it!”

“I know it,” said Tom, quietly. “But this may be the eleventh successful time. Now that's my plan for rescuing Harry Leroy. If any of you have a better one let's hear it.”

No one answered, and finally Nellie spoke.

“No,” she said, with a shake of her head, “it's very fine and noble of you boys, but I can't allow it. If you wouldn't let me give myself up—exchange myself for Harry, I can't let you give your lives for him this way. It wouldn't be fair. It would be depriving the Allies of two valuable fighters, to possibly get back one, and the possibility is so slim that—well, it's suicidal!” she exclaimed.

“Not so much so as you think,” said Tom. “I've got it all figured out as far as possible. And as for landing in hostile territory, if all goes well, and the big battle progresses as Pershing and his aides think it will, maybe we won't have to land in hostile territory at all. We may drive the Germans back, and then the prison will be within our lines.”

“That's so!” cried Jack. “I didn't think of feat. Tom, old man, maybe your scheme isn't as crazy as I thought! Anyhow, I'm in it with you. The only thing is—will this big battle take place?”

“'It will unless the Germans decide to surrender between now and the day set,” Tom answered grimly, “and I hardly believe they'll do that. It's a going to be some fight!”

“Glad of it!” cried Jack. “Now we've got something to live for!” As if he and Tom did not risk their lives every day to make life in the civilized world something worth living for.

“Well, we must be getting back!” exclaimed Tom, as he looked at his watch. “All leaves will be stopped in a few days—just before we start preparations for the big battle. If we can we'll see you once more before then.”

“And afterward?” inquired Nellie, softly and pleadingly.

“Yes, and afterward, too!” exclaimed Tom. “And we'll bring Harry back with us. Now good-bye!”

It was a more solemn farewell than the friends had taken in some time, for all felt the impending events, and Tom and Jack talked but little during the return trip from Paris to their headquarters.

What Tom had said about the big battle was strictly true. It had been decided in high quarters that it was time the newly arrived American soldiers showed what they could do. That they could fight fiercely and well was not a question, it was only a matter of getting them familiar with the different conditions to be met with on the European battlefields, against a ruthless foe.

Tom and Jack had a chance for one more hasty, flying visit to Paris, and then all leave was withdrawn, and there began in and about the American camp such a period of tense and intensive work as bore out what Tom had said. The big battle was impending.

Great stores were accumulated of rations and munitions. Great guns were brought up into position and skillfully camouflaged. Machine guns in great numbers were prepared and a number of aeroplanes were brought from other sectors and made ready for the flying fight.

“How are your plans coming on?” asked Jack of Tom, at the close of a day when it seemed that every one's nerves were on edge from the strain of preparing.

“All right,” was the answer. “I've spoken to a number of the boys, and they're with me. You know we're pretty much 'on our own,' when we're flying, and I think that we can drop the bombs and make a descent long enough to pick up Harry and other refugees if we break open the prison.”

“But suppose we land, stall the engines and the Germans surround us?”

“That mustn't happen,” said Tom. “We won't stall the engines for one thing. We'll just have to drop down, and taxi around as well as we can until we pick up Harry, or until he sees us. The machines will carry three as well as two, and even if we have, by some mischance to go up in singles, they'll carry double. But I figured on your being with me. Harry knows enough of the game to be on the lookout when he hears the bombs drop and sees the planes hovering over him, and he'll tip off the others to be ready for a rescue.

“Of course I don't say we can get 'em all, and maybe something will happen that we can't get Harry away. But I think we'll teach Fritz a lesson, and I think we can break up the prison camp so some of the poor fellows can get away. As I said, it's a desperate chance, but one we've got to take.”

“And I'm with you!” exclaimed Jack. “And now when does the big battle take place?”

He was answered a moment later, for an orderly arrived with instructions to the air service boys to report at their hangars at once.

There they were told something of the impending attack—the first public mention of it, though more than one had guessed something unusual was in the air from the tenseness of the last few days.

The attack was to start at dawn the next morning, preceded by an intense artillery fire. It was to be the fiercest rain of shells since the Americans had come to the front lines. Then the infantry, supported by tanks and aeroplanes, would follow, going over in waves which it was hoped would overwhelm the Germans.

That night was a tense one. Suppose the enemy had guessed, or a spy had given word of the impending battle? Then success would be jeopardized. But the night passed with only the usual exchange of shots and the sending up of star shells over No Man's Land.

And so, as the hour of dawn approached, the tense and nervous feeling grew. Tom and Jack, with their comrades in their hangars, were dressed in their fur garments and ready. Their machines had received the last touches from the hands of the mechanics, and each one was well equipped with bombs and machine gun ammunition. Tom and Jack were to be allowed to go up together in a big double bombing plane.

The night passed. The hour approached. Anxious eyes watched the hands of watches slowly revolve.

Then suddenly, as if the very earth had been blasted away from beneath them, the batteries of big guns belched forth fire, smoke and shell.

The great battle was on!