Duvall regarded his questioner calmly. "I do not know what you are talking about, gentlemen. I have no snuff box, nor do I use tobacco in that form. And now, if you have concluded this outrage upon an American citizen, perhaps you will let me return quietly to my hotel. If you do not, I promise you you shall pay heavily for it."
His words, for the moment, seemed to disconcert the two men. Then Mayer laughed, "Nothing but bluff, young man—American bluff. I know who you are. You followed Seltz here from London, and got the snuff box from him by a trick. Now tell us where it is."
The detective smiled. "I do not know what you are talking about," he said, quietly.
Dr. Hartmann growled out an oath. "Take off his things, Mayer. He may have the box in his clothing somewhere—or the heel of his boot. I'll get a dressing-gown, from above." He left the room, and Duvall heard him clanking up the iron staircase.
"If you insist on removing my clothes," he said to Mayer, "I prefer to do so myself." He rapidly stripped off his evening suit and shoes, and threw them upon the floor.
The man gathered them up, feeling each article carefully, and testing the heels of the boots with a knife which he drew from his pocket. He appeared greatly disappointed at not finding the object of his search. Then he again examined Duvall, feeling his person from head to toe with great care. He had just finished when the doctor returned with a long gray woolen dressing gown, which he tossed to the detective.
"He's hidden it somewhere. He hasn't got it with him," Mayer exclaimed, angrily.
"Take him to the small bedroom in the west wing," said the doctor. "We'll get it out of him, before we're through. You can leave the clothes in the laboratory." He cast his eye about the room to see that nothing had been forgotten. Duvall trembled, thinking of the hat lying unseen behind the packing case in the corner. Hartmann, however, did not observe it. Without saying anything further he threw open the door, and they all passed into the little hall.
From there, Duvall was led up the iron staircase to the floor above, and found himself in a large room which he took to be the doctor's laboratory. It was dimly lit by means of a reading-lamp. He had a confused vision of a number of scientific appliances, bulking huge and forbidding in the shadows, and then was conducted through a glass door and along a corridor similar to the one through which he and the doctor had so recently passed on the floor below. He judged, from the direction they were taking, that it was directly above the lower passageway, and led back to the main part of the house.
In this he soon found that he was correct. A door at the end of the corridor gave entrance to the upper central hall of the main building. He was led off to the right, catching a momentary glimpse of a woman attendant sitting in a chair near the head of the stairs as he passed. In a few moments Hartmann paused before a door, threw it open, and turned on the lights. The detective saw before him a well-furnished bedroom, with two large windows, and another door, which he later found gave entrance to a bathroom. The dark shadows against the night light without showed him at once that the windows were barred.