I made a misstep in the pantry, and brought up against a blank wall. It seemed to me I heard the sound of feet running up steps, and when I found a door at last, I threw it open and dashed in. The next moment the solid earth slipped from under my feet, I threw out my hand, and it met a cold wall, smooth as glass. Then I fell--fell an incalculable distance, and the blackness of the night came over me and smothered me. CHAPTER XII MY COMMISSION When I came to, I was lying in darkness, and the stillness was absolute. When I tried to move, I found I was practically a prisoner: I had fallen into an air shaft, or something of the kind. I could not move my arms, where they were pinioned to my sides, and I was half-lying, half-crouching, in a semi-vertical position. I worked one arm loose and managed to make out that my prison was probably the dumb-waiter shaft to the basement kitchen. I had landed on top of the slide, and I seemed to be tied in a knot. The revolver was under me, and if it had exploded during the fall it had done no damage. I can hardly imagine a more unpleasant position. If the man I had been following had so chosen, he could have made away with me in any one of a dozen unpleasant ways--he could have filled me as full of holes as a sieve, or scalded me, or done anything, pretty much, that he chose. But nothing happened. The house was impressively quiet. I had fallen feet first, evidently, and then crumpled up unconscious, for one of my ankles was throbbing. It was some time before I could stand erect, and even by reaching, I could not touch the doorway above me. It must have taken five minutes for my confused senses to remember the wire cable, and to tug at it. I was a heavy load for the slide, accustomed to nothing weightier than political dinners, but with much creaking I got myself at last to the floor above, and stepped out, still into darkness, but free. I still held the revolver, and I lighted the whole lower floor. But I found nothing in the dining-room or the pantry. Everything was locked and in good order. A small alcove off the library came next; it was undisturbed, but a tabouret lay on its side, and a half dozen books had been taken from a low book-case, and lay heaped on a chair. In the library, however, everything was confusion. Desk drawers stood open--one of the linen shades had been pulled partly off its roller, a chair had been drawn up to the long mahogany table in the center of the room, with the electric dome overhead, and everywhere, on chairs, over the floor, heaped in stacks on the table, were papers.