The delicate needle of the instrument did not quiver. "Batteries dead!" said the repair man. "Jim, what the hotel-bill do you mean by getting dead batteries? Go back and bring a new lot, and _test_ 'em." In due time Jim returned. "These test to fifteen," said he. "Go to it!" "Test--nothing!" roared the repair man after a moment. "These are dead, too." Percy Darrow left the ensuing argument to its own warmth. It was growing late. In the corridor a few hastily-brought lamps cast a dim light. Percy collided against Doctor Knox entering the building. "Not fixed yet?" asked the latter in evident disappointment. "What's the matter?" "I don't know," said Darrow slowly; "it puzzles me. It's more than an ordinary break of connections or short-circuiting through apparatus. If one could imagine a big building like this polarized in some way--anyhow, the electricity is dead. Look here." He pulled an electric flash-light from his pocket. "Bought this fresh on my way here. Tested it, of course. Now, there's nothing wonderful about these toys going back on a man; _but_"--he pressed the button and peered down the lens--"this is a funny coincidence." He turned the lens toward his friend. The filament was dark. CHAPTER III THE MOVING FINGER WRITES The condition of affairs in the Atlas Building lasted long enough to carry the matter up to the experts in the employ of the companies; that is to say, until about three o'clock the following morning. Then, without reason, and all at once, the whole building from top to bottom was a blaze of incandescent light. One of the men, stepping to the nearest telephone, unhooked the receiver. To his ear came the low busy hum of a live wire. Somebody touched a bell button, and the head janitor, running joyfully, two steps at a time, from his lair, cried out that his bell had rung. The little group of workmen and experts nodded in a competent and satisfied manner, and began leisurely to pack their tools as though at the successful completion of a long and difficult job. But every man jack of them knew perfectly well that the electrical apparatus of the building was now in exactly the same condition as it had been the evening before. No repair work had followed a futile investigation. As the group moved toward the outer air, the head repair man quietly dropped behind. Surreptitiously he applied the slender cords of his pocket ammeter to the zinc and carbon of the dead batteries concerning whose freshness he and his assistant had argued. The delicate needle leaped forward, quivered like a snake's tongue, and hovered over a number. "Fifteen," read the repair man; and then, after a moment: "Hell!"