He stopped as abruptly as he had started. Suddenly the ticking of the clock-work had ceased, and it was succeeded by a pause infinitesimally brief and withal infinitely extended. Grenelli half rose from his chair, his hands beating backward at the air. Then came a curious premonitory whir of the hidden mechanism. The metallic rattle of the gong was magnified in my ears to the dimensions of a roll of thunder; then I saw that Indiman had torn the wrappings from the box and had opened it. There was no mistaking the object that lay within--a common American alarm-clock. Grenelli looked at it, wide-eyed, then he rolled off his chair in some sort of a fit, and Indiman and I were left to stare each other out of countenance. "Plain enough, I think," said Indiman. "There WAS another box containing the infernal machine, but Grenelli made up the dummy so successfully as to deceive even himself. He got the two mixed up, and this, the original and harmless package, was the one that should have reached the Russia if Ben Day hadn't stopped to buy a red apple. Of course, it was the ticking of the clock escapement that misled him--and me. "The alarm mechanism must have been wound up and set just before the clock left Redfield & Company's yesterday morning. Possibly a practical joke on some clerk's part, but that doesn't matter. You see, there is a twenty-four hour dial for the alarm, and it was set at a little before XIX, corresponding to about a quarter of seven." "But your watch says a quarter of eight," I objected. "I set it an hour ahead," answered Indiman. "I'm not altogether a fool, and although I was certain that Grenelli would weaken, I wanted some leeway for myself and you. Undoubtedly, the infernal machine was timed for eight o'clock, and Grenelli knew it. He tried to hold on long enough to insure our destruction, and yet get away himself, but he couldn't be sure of those last few minutes. By-the-way, the box containing the bomb must be at his house. It ought to be put out of business at once. Can you get the fellow on his feet?" But it took some time to bring the man around, and it was more than half an hour later before we got away, the three of us together in a hansom. I should say that the lodging occupied by Grenelli and Day was the loft of a disused private stable, situated in a side street, three or four blocks off, and the driver was instructed to get there as quickly as possible. As we passed a jeweler's place Grenelli glanced at the electric-clock dial in the window and saw that it was twenty-five minutes of eight. He had been deceived, then; he knew it instantly. "But it worked both ways," he sneered. "I have my secret still." "Quite so," answered Indiman, and smiled. At the corner we were halted by a hail from the sidewalk. It was Brownson, of the detective bureau.