Obenreizer saw his chance, here, of finding out the repository in which his employer's private papers were kept. "Can't I save you the trouble, sir?" he asked. "Can't I put those documents away under your directions?" Maitre Voigt laughed softly to himself; closed the portfolio in which the papers had been sent to him; handed it to Obenreizer. "Suppose you try," he said. "All my papers of importance are kept yonder." He pointed to a heavy oaken door, thickly studded with nails, at the lower end of the room. Approaching the door, with the portfolio, Obenreizer discovered, to his astonishment, that there were no means whatever of opening it from the outside. There was no handle, no bolt, no key, and (climax of passive obstruction!) no keyhole. "There is a second door to this room?" said Obenreizer, appealing to the notary. "No," said Maitre Voigt. "Guess again." "There is a window?" "Nothing of the sort. The window has been bricked up. The only way in, is the way by that door. Do you give it up?" cried Maitre Voigt, in high triumph. "Listen, my good fellow, and tell me if you hear nothing inside?" Obenreizer listened for a moment, and started back from the door. "I know!" he exclaimed. "I heard of this when I was apprenticed here at the watchmaker's. Perrin Brothers have finished their famous clock-lock at last--and you have got it?" "Bravo!" said Maitre Voigt. "The clock-lock it is! There, my son! There you have one more of what the good people of this town call, 'Daddy Voigt's follies.' With all my heart! Let those laugh who win. No thief can steal _my_ keys. No burglar can pick _my_ lock. No power on earth, short of a battering-ram or a barrel of gunpowder, can move that door, till my little sentinel inside--my worthy friend who goes 'Tick, Tick,' as I tell him--says, 'Open!' The big door obeys the little Tick, Tick, and the little Tick, Tick, obeys _me_. That!" cried Daddy Voigt, snapping his fingers, "for all the thieves in Christendom!" "May I see it in action?" asked Obenreizer. "Pardon my curiosity, dear sir! You know that I was once a tolerable worker in the clock trade." "Certainly you shall see it in action," said Maitre Voigt. "What is the time now? One minute to eight. Watch, and in one minute you will see the door open of itself." In one minute, smoothly and slowly and silently, as if invisible hands had set it free, the heavy door opened inward, and disclosed a dark chamber beyond. On three sides, shelves filled the walls, from floor to ceiling. Arranged on the shelves, were rows upon rows of boxes made in the pretty inlaid woodwork of Switzerland, and bearing inscribed on their fronts (for the most part in fanciful coloured letters) the names of the notary's clients. Maitre Voigt lighted a taper, and led the way into the room.