Tom, just as soon as they had entered the great hall, had fixed his eyes on several old-time figures that stood in niches, each representing some period of the history of early France and showing the type of armor worn by the fighting knights of those days.

"Hide behind that knight there! Quick, Jack!" he now hissed into the ear of his comrade.

Jack understood.

As quick as a flash both of the air service boys shot toward their separate goals. Shuffling footsteps sounded that told of some one coming; but thanks to the swiftness of their movements the boys managed to conceal themselves in time.

Peeping out from behind the coats of chained mail that screened them Jack and Tom fastened their eyes on the advancing figure. Just as they expected, it proved to be a soldier who had the task of serving while the general was celebrating with his friends and fellow officers.

He was carrying a tray on which were several empty bottles, and it could be easily guessed that the soldier had been sent for a further supply of wine from the cellar below.

They could hear him mumbling to himself, as though not very happy, despite his opportunities to tilt the bottles up and drain the last drop left in each. This he was doing now as the boys watched, but continuing to mutter.

Then they saw him draw his sleeve across his face, and when he took it down to the astonishment of the watchers there were streaks of blood marking both cheeks and nose. Evidently General von Berthold was considerable of a bully and tyrant when in his cups, even as he may have been a severe martinet when on duty.

Jack ground his teeth at seeing this exhibition of pettiness on the part of the general. He had heard more than once that German officers, from sub-lieutenants upward, were terribly severe with their men, treating them brutally, and acting as though they were themselves of a superior class; but this was the first time he had actually come in contact with anything of the kind.

"What fools!" Jack muttered to himself. "Why can't they take a lesson from Russia, where the people have risen and put ever so many of their former officers to death. And Russian commanders were gentle beside these domineering brutes. But they'll get their dose some day before long, that's as sure as fate. And poor little Helene!" Jack's heart was heavy as he thought of his little protÉgÉ's sister.

The man picked up his tray again and went stumbling along the hall, still muttering, then chuckling half hysterically, as though some pleasant thought had flashed across his mind. Jack imagined he must be anticipating a day of reckoning that was coming—a day when old scores would be wiped out and the slate be made clean for a new deal.

More than ever Jack was determined that little Helene should not be left in the charge of such an ill-tempered man. If General von Berthold could show such spleen because his man servant displeased him slightly he was apt to treat a child cruelly.

But the coast being clear, Tom issued forth and beckoned to his companion to come along. They hastened up the broad stairs of the chateau, reaching the second floor without mishap.

Here they found a maze of passages that would have puzzled any one lacking the ability Tom possessed for solving riddles.

"Which way next?" Jack whispered in dismay, as he turned from one to another of the various passageways branching off from the main hall.

"Always keep to the right," answered his companion. "Remember that wing is the only one saved from the wreck."

He himself was looking at the floor, for there was sufficient light to enable him to see. Jack's eyes followed those of his chum, and he could not keep from uttering a low exclamation of admiration as he comprehended the system Tom was following.

When the vandals had attempted several times to wreck the chateau in a general spirit of destructiveness, the dust had settled heavily over everything. They had noticed it down below, and on the stairs as well, as they came along. It was up here, too, on the floor of the main hall, as well as those in various passages leading into unknown depths of the great building.

Tom was selecting that passage which he could see from the multitude of footprints had been most generally used. It was indeed a clever idea of the air service boy's, and one that promised to be crowned with success.

"We'll go this way, and try it out," he told Jack, commencing to move along as he spoke.

Jack, for a wonder, was silent. Truth to tell, he found himself lost in admiration of the cleverness shown by his chum, and of the plan which he felt certain would never have occurred to him.

When the light became dim Tom was provided with a supply of matches, which fact further surprised and humiliated Jack, because on investigating his own pockets he could produce only two matches.

They went down several steps, only to mount again to the same level a few minutes later. Jack could easily believe they must have reached the extremity of that extensive right wing. He caught the sound of heavy voices in discussion, coming from exactly below; which told him the dining-hall must be in that quarter.

So far they had fortunately met no one. Jack wondered what would happen if they should come upon a sentry standing guard, perhaps over the apartment where the general slept when he could tear himself away from his pleasures and his work. But his confidence in Tom had mounted to such heights by now that he expected his pilot would be equal to even that occasion.

Then Tom stopped short.

He seemed to be examining something at his feet, for he had struck one more of his matches. Jack, seeing him look at a closed door, fancied that their search was in a fair way of coming to a successful end.

No sooner had the match expired than Tom gently tried the door. He did not seem very much surprised to find it locked. Bending down he next proceeded to examine the lock, for it seemed to be provided with one, though many of the other doors were not, such things not being in general use in the centuries back, when this ancient pile of stone was built.

He turned to his companion and whispered encouragingly.

"She must be in that room, for many feet have passed in and out. Among the footprints close by here are several small, childish ones. We are surely on the right track, Jack."

"H'm! but the door seems to be fast. And I suppose the key is in von Berthold's pocket right now. How in the wide world are we going to get in there to save Helene?"

"We'll settle that," snapped Tom. "There's always a way to do a thing. On either side there's a door. Let's see if one of those happens to be unfastened."

The very first trial brought success, and Jack began to feel a glow of coming good fortune. If they were not interrupted in their work he believed that nothing could long withstand such a determined spirit as Tom always injected into anything he undertook. It accounted for his successes in school sports, and he carried the same characteristic with him into army service.

They passed into the dark recesses of the room that seemed to adjoin the one of the locked door. Jack could see a window ahead, for a certain amount of light filtered through the small dusty diamond-shaped panes of glass. He even noted a tree without, its branches moving in the breeze that crossed this ridge elevation, though they had not felt it down in the valley.

Tom closed the door after them. Then again he struck a match, eager to survey their surroundings before attacking the problem that now presented itself.

Some old-time furniture could be seen, but in a dilapidated condition, as though vandal hands had used an ax on the rare wood, regardless of its value. Dust lay everywhere, dust that may have come from the frequent explosion of grenades used in the process of demolition.

The match went out, leaving Jack still staring about him. It seemed like a strange dream to him, anything but a reality. But there was Tom shuffling across to the window. Jack began to get a grip on the probable scheme that had appealed to his chum, and also a grip on himself, for he suddenly realized that he had not been doing his part.

Why, of course, the only possible way of reaching that other room would be through means of a connecting link; and this could be furnished through the windows.

Tom was already leaning out, and investigating affairs. It was a precarious moment and the decision to be arrived at was important. But having come this far, and taken such desperate chances, they must keep going until success had crowned their efforts, or it was proved that absolutely nothing could be accomplished.

Tom turned and beckoned to his comrade.

"It can be done, don't you think, Jack? But we must be very careful," came in softest tones. "There's a narrow projecting ledge that will serve us for a footing; but we must make sure of every step, because a tumble would break our necks."

Jack peered out and looked carefully about.

"Yes," he finally announced, "this is our only chance. But as Jeanne and Helene are my especial care I'm going first, Tom. I've already imposed on you and not done my full share since entering the chateau."

With these words Jack crawled out of the window.