He dashed open the door of the inner apartment with his foot, and then with a growl of long-suppressed fury the bloodhound sprang upon him; rendered fiercer by the blood which still flowed from the wound in the head of Hautois, it grasped him by the throat, snarling, worrying and tearing, till dog and man fell down together—the dog above, the man below.

Trembling with weakness and the overstrained exertion of my recent struggle, I rose and looked with stern exultation on this new conflict, at this new and unexpected ally, against whom the human brute fought apparently in vain, for with all his strength he failed to wrench or tear the dog's sharp fangs from his already lacerated throat.

At last, by the terror of approaching death endued with twice his natural strength, while uttering convulsive sobs of agony, he rose to his full height, and reeled about the apartment with the great dog hanging at his throat and the chain rattling at its collar; and what a face was his, when for a moment a ray of moonlight fell on it through the broken casement!

Hautois was reeling about close to the trap-door, when an idea seized me. I threw it open, and gave him a push with all my strength; and through the black aperture, with a shriek and a growl the man and dog vanished together.

I stood alone—alone, with no sound in my ears save the rush of the subterranean stream—the torrent of St. Aubin du Cormier; how deep, how far down below, coming from whence and flowing to where, no man knew; but my teeth chattered, and a shudder passed over me.

I let the trap-door drop to shut out the horrid sound, and reeled giddily into the outer apartment.

CHAPTER XVII.
THE CHAUMIÈRE.

It was not until some minutes had elapsed that I became fully conscious the fierce struggle was over, and that Jacqueline was avenged; but there lay on the floor the pistols, the knife, and the blood of him whose body was now whirling along the chasms and amid the eddies of that subterranean stream whose source and outlet are alike unknown.

Tossing a stool upon the fire to feed the sinking flame, and heedless of the danger of being found in what was doubtless the haunt, the abode of an outlaw and robber, perhaps the rendezvous of his partners in crime, I sank upon the floor, to reflect and to rest. It was only then that I felt how weak, how weary I was in body, how sick and ill at heart.