“Man knoweth not whither this dark stream may lead,” replied Bartoletti, solemnly, lighting at the same time a spare wick of his lamp, to embark it on a morsel of wood which he pushed into the current. For several minutes, as it seemed to their watching eyes, the light floated farther and farther, till swallowed up by degrees in the black distance. All were now somewhat impressed with the gloom and mysterious silence of the place. Bartoletti took courage, and informed the Regent he was about to begin. “Not till you have drawn a pentacle!” objected the Duke, apprehensively. “Such a precaution should on no account be neglected.” “It is unnecessary, Highness,” answered the other. “Against the lesser fiends, indeed, it forms an impregnable defence; but he who is approaching now, the very Prince of Darkness himself, cares no more for a pentacle than you do!” The Regent would not be satisfied, however, till, under Malletort’s superintendence, he had drawn with the point of his sword a circle and triangle in magic union on the bare rock. Then he ensconced himself carefully within his lines, and bade the magician “go on.” After a considerable display of mummery, and the repetition of many sentences, which, as they were couched in Latin, Bartoletti felt would be liable to little criticism from his listeners, he produced a small bundle of shavings from under his cloak, and piling these on the water’s edge, poured over the heap certain essences, ere he set the whole on fire. The cavern now became filled with a thick cloud of smoke, fragrant in smell, and though stupefying to the senses, not suffocating the lungs. Reflected in the black water beneath, as the flames waved and leaped and flickered, the unsteady light produced an effect of vast and shadowy distance on the dim recesses of the cavern, and prepared the minds of the spectators for some vague, uncertain, yet awful result. Plunging it once more into his bundle, Bartoletti spread his hand over the embers. A blue lurid glare, that turned all their faces ashen white, now replaced the shifting wavering light of the flames. “It is the death-fire!” whispered the Italian; and touching the Duke’s shoulder, he pointed to the roof of the cavern. A gigantic arm and hand, with forefinger pointed downwards, were shadowed distinctly on its ribbed and slimy surface. The Duke trembled, and sweat stood on his brow; Bartoletti, too, shivered, though with less reason. Captain George nodded approvingly, and Bras-de-Fer pulled the buckle of his sword-belt to the front. “You may ask three questions,” whispered the shaking Italian. “Not another syllable, if you would leave the cave alive!” The Duke cleared his throat to speak, and his voice came dry and husky, while he formed the words with effort, like a man using a foreign tongue. “I adjure you, tell me truly, who is my chief enemy?”