At first the opal spun rapidly, throwing out sparks of coloured fire, then it gradually slowed down as the string unwound itself. Slower and slower it twisted, sparkling a ray of emerald green, a dazzling shaft of blue, or a glory of golden haze. At last the motion was hardly perceptible, and the worshippers held their breaths in reverential awe. It moved slightly, it paused, it began to revolve slowly backward, and then, with a slow oscillation, hung motionless from the roof. From out its white breast shot a fierce glare of violent crimson. The will of the god was war! Amid a dead silence Ixtlilxochitli stalked forth to the verge of the staircase, now wearing only his black garments, and held up his scarlet mantle as a sign that the opal was red. A frantic shout of delight roared upward to the sky, and the multitude below broke into a frenzy of joy. The religious ceremonies were at an end, the festival had commenced. "Por el amor de Dios, let me go back to my room," whispered Jack, in the ear of Cocom. "If I stay here, I will assuredly smash that idol and kick old Ixtlilxochitli down the steps." Unwilling to risk such a scandal, Cocom hurried his charge out of the temple at once. Ixtlilxochitli came forward as Jack departed, evidently expecting to be congratulated on a successful performance, but the young engineer, with a gesture of repugnance, turned his back on the old villain, and sprang down the steps of the teocalli. The high-priest looked grave. This dissatisfaction of the visible deity was a bad omen. "This place is a hell upon earth," cried Jack, throwing himself down on his couch. "How many victims do they sacrifice to that infernal deity, Cocom?" The old man counted on his fingers. "Señor, about one hundred in the year, more or less." "How terrible!" "Yes, Don Juan, more were offered up in the old days. It is said by the priests that at the dedication of the great Teocalli in Mexico seventy thousand victims were offered to Huitzilopochtli." "Butchery! I tell you what, Cocom, if I get safely back, and this war is concluded in favour of the Junta, I will get Don Francisco Gomez to send an army to stop this sort of thing." Cocom smiled scornfully. "Nay, Señor; no army could reach the city of Totatzine. It is hidden, and the secret way is but narrow, as you shall see. Besides, Don Juan, I would not aid an army to come hither. The city is sacred." "But you do not believe in this devil-worship?" "No, Señor. Still, it was the religion of my fathers. I do not wish it destroyed."