Gulian, struggling in the grasp of Tarleton, clapped his hands twice, and cried aloud: "Cain! Cain!" The next moment it seemed as though a crushing weight had bounded, or been hurled, against the colonel's back; he was dashed to the floor; he found himself struggling in the fangs of a huge dog, with short, shaggy hair, black as jet, short ears, and formidable jaws. As the dog uttered a low growl, his teeth sank deep into the back of Tarleton's neck, and Tarleton uttered a groan of intolerable agony. Tarleton was dragged along the floor, by the ferocious beast, which raised him by the neck, and then dashed him to the floor again; treating him as the tiger treats the prey which he is about to strangle and kill. Cain was indeed a ferocious beast. He had accompanied the unknown over half the globe; and was obedient to his slightest sign; defending those whom he wished defended, and attacking those whom he wished attacked. Before leaving the mansion, the unknown had placed Cain before the door of Gulian's room, and given Gulian into its charge. "Guard him, Cain! obey him, Cain!" And, as Tarleton opened the door, at a sign and a word from Gulian, the dog proved faithful to his master's bidding. In the grasp of this formidable animal, Tarleton now found himself writhing--his blood spurting over the floor, as he was dragged along. As Gulian beheld this scene, and heard the cries of Tarleton mingling with the low growl of the dog, his heart relented. He forgot all that Tarleton had made him suffer. "Cain! Cain!--here, Cain!--here!" he cried; but in vain. Cain had tasted blood. His teeth twined deep in his victim's neck; and his jaws reddened with Tarleton's blood; he did not hear the voice of Gulian. It was a terrible moment for Tarleton. Uttering frightful imprecations between his howls of pain, he made a last and desperate effort--an effort strengthened by despair and by pain, which seemed as the pang of death,--he turned, even as the teeth of the dog were in his neck; he clenched the infuriated animal by the throat. Then took place a brief but horrible contest, in which the dog and the man rolled over each other, the man clutching, as with a death-grasp, the throat of the dog, and the dog burying his teeth in the man's shoulder. Gulian could bear the sight no longer; he sank, half fainting, against the bureau, and hid his eyes from the light. Presently, the uproar of the combat--the growl of the dog, and the cries of Tarleton--were succeeded by a dead stillness. Gulian raised his eyes. Tarleton stood in the center of the room, his face and white coat bathed in blood--his bowie-knife, also dripping with blood, held aloft in his right hand. He presented a frightful spectacle. His coat was rent over the right shoulder, and his mangled flesh was discernible. And that face, whose death-like pallor was streaked with blood, bore an expression of anguish and of madness, which chilled Gulian's heart but to behold.