He stopped short.  A vague idea had entered his mind, which he felt might possibly be his salvation.

It came to him in touching the rope which he had used in his descent from the prison to the ledge, and which, firmly attached to the bars, hung down the side of the tower.

“If you had that rope which hangs there useless, Corporal, you could add it to these fragments, and then it would be long enough to carry you to the foot of the rock.  But how shall I obtain it?  It is certainly impossible to go back after it! and how can I pull it down when it is so securely fastened to the bars?”

He sought a way, found it, and pursued it, talking to himself all the while as if there were two corporals; one prompt to conceive, the other, a trifle stupid, to whom it was necessary to explain everything in detail.

“Attention, Corporal,” said he.  “You are going to knot these five pieces of rope together and attach them to your waist; then you are going to climb up to that window, hand over hand.  Not an easy matter!  A carpeted staircase is preferable to that rope dangling there.  But no matter, you are not finical, Corporal!  So you climb it, and here you are in the cell again.  What are you going to do?  A mere nothing.  You are unfastening the cord attached to the bars; you will tie it to this, and that will give you eighty feet of good strong rope.  Then you will pass the rope about one of the bars that remain intact; the rope will thus be doubled; then you let yourself down again, and when you are here, you have only to untie one of the knots and the rope is at your service.  Do you understand, Corporal?”

The corporal did understand so well that in less than twenty minutes he was back again upon the narrow shelf of rock, the difficult and dangerous operation which he had planned accomplished.

Not without a terrible effort; not without torn and bleeding hands and knees.

But he had succeeded in obtaining the rope, and now he was certain that he could make his escape from his dangerous position.  He laughed gleefully, or rather with that chuckle which was habitual to him.

Anxiety, then joy, had made him forget M. d’Escorval.  At the thought of him, he was smitten with remorse.

“Poor man!” he murmured.  “I shall succeed in saving my miserable life, for which no one cares, but I was unable to save him.  Undoubtedly, by this time his friends have carried him away.”

As he uttered these words he was leaning over the abyss.  He doubted the evidence of his own senses when he saw a faint light moving here and there in the depths below.

What had happened?  For something very extraordinary must have happened to induce intelligent men like the baron’s friends to display this light, which, if observed from the citadel, would betray their presence and ruin them.

But Corporal Bavois’s moments were too precious to be wasted in idle conjectures.