He stepped to the switch-board, and, after going through a series of genuflections, accompanied by an undertone of carelessly gabbled ritual, he depressed a lever. Instantly the room was in darkness and the spluttering wire ceased its crackling. The priest passed into the great hall, motioning Constans to follow him. Another brief and incomprehensible ritual and he approached the vibratory motor. Constans watched intently as he proceeded to manipulate a series of polished rods and levers. Suddenly the loud, humming note separated into two distinct tones, at first in musical accord and then becoming more and more dissonant. The revolving disk slowed down and stopped, and with it the dynamo came finally to rest. The hour of worship had come to an end; the Shining One had departed from his sanctuary. At the suggestion of his ecclesiastical superior Constans brought within doors the offerings of food that had been left by the earlier worshippers. There were some dry cakes, baked of rye flour, a pot of honey, cheese, milk, and two bottles of wine. These provisions he was ordered to carry to a room on the story above the street, where a fire of sea-coal burned cheerfully in a brazier. Here they sat down and feasted amicably together, for the frosty air had put a keen edge to appetite and the noon hour was long overpast. And then as they sat at ease after the meal and the old man was well started on his second pipe, Constans came directly to the point. "If I am to serve the Shining One acceptably," he said, "there are many things that I should know. May I speak, my father?" The priest looked at him searchingly. "As you will," he replied. All through the afternoon and deep into the night they talked earnestly together. And so, from time to time, in the days that were to follow, for it was a question of many things, and of some that were hard of understanding. XIV ARCADIA HOUSE Little by little, Constans succeeded in piecing together the puzzle, for puzzle indeed it was. Here in this city of the dead he had found in actual operation one of the great power-producing plants of the ancient world. How to account for the miracle of its preservation during the generations that had passed since the sun of knowledge had disappeared beneath the sea of mental darkness. What sufficient explanation could there be for this amazing fact? From Prosper, the priest, Constans drew the main outlines of the story, and his studies enabled him to fill in the details. In brief, it may be set down as follows: