He was soon obliged to admit that he was mistaken in this opinion.

The investigation revealed facts which seemed incomprehensible to him.

It was evident that the Baron d’Escorval and Corporal Bavois had been compelled to accomplish two successive descents.

To do this the prisoners had realized (since they had succeeded) the necessity of having two ropes. Martial had provided them; the prisoners must have used them. And yet only one rope could be found—the one which the peasant woman had perceived hanging from the rocky platform, where it was made fast to an iron crowbar.

From the window to the platform, there was no rope.

“This is most extraordinary!” murmured Martial, thoughtfully.

“Very strange!” approved M. de Courtornieu.

“How the devil could they have reached the base of the tower?”

“That is what I cannot understand.”

But Martial found another cause for surprise.