With the daylight streaming through the high windows the magnificence of the apartment became fully revealed, but the ambulanciers, intent upon the task before them, did not linger. In the adjoining room they stopped for a few moments to admire the flood of lovely color in the stained glass windows and then passed on. A thorough examination of the first floor was quickly made.

"It's as certain as anything can be that the 'mysterious poilu' is not down here," declared Chase, at length. "To tell the truth, boys, I've about given up hope of seeing him to-day."

"You can't find a bird if it has flown," laughed Dunstan.

"Adventure, as a rule, comes only when you are not looking for it," commented Don. "Fellows, I will now give an illustration of how the count's guests didn't act when they entered the château."

And, with a laugh, Don bounded up the grand stairway two steps at a time.

A race speedily developed, and no doubt had the stern and dignified Count de Morancourt been present he would have viewed the spectacle with considerable astonishment and indignation. But there were no haughty personages to cast a damper upon the spirits of the Americans, because it very soon developed, "beyond the peradventure of a doubt," as Dunstan expressed it, that there was no one besides themselves within the château. "Unless," he added, "he should have taken refuge in the tower."

"Nothing easier than to find out!" chuckled Don. "Though"—he spoke rather thoughtfully—"it wouldn't be a very pleasant place in which to meet a revolver face to face."

As usual, he took the lead, and presently, in single file, they were ascending the circular staircase which led to the top of the tower. And as no other sounds but the echoes of their own footfalls and voices were heard within the gloomy walls they quite resigned themselves to the thought that their mission had been a failure.

"Very well! But the meeting is only postponed," declared Chase, with a snap of his jaw.

"We must demonstrate, to 'Peewee's' satisfaction at least, that that part of the story will come to an end," laughed Don.