Then, very carefully indeed, I lifted the heavy mirror down from its console and leaned it face-inward against the wall; prying off two of the thin, narrow boards nailed to the back. With equal caution I smartly tapped the cut-around space with the heavy wooden handle of the glass-cutter.
At the very first tap the whorl-containing section of glass dropped out on the Bokhara rug beneath. I did not know what might happen, but was keyed up for anything, and took a deep involuntary breath. I was on my knees for convenience at the moment, with my face quite near the newly made aperture; and as I breathed there poured into my nostrils a powerful dusty odor—a smell not comparable to any other I have ever encountered. Then everything within my range of vision suddenly turned to a dull gray before my failing eye-sight as I felt myself overpowered by an invisible force which robbed my muscles of their power to function.
I remember grasping weakly and futilely at the edge of the nearest window drapery and feeling it rip loose from its fastening. Then I sank slowly to the floor as the darkness of oblivion passed over me.
When I regained consciousness I was lying on the Bokhara rug with my legs held unaccountably up in the air. The room was full of that hideous and inexplicable dusty smell—and as my eyes began to take in definite images I saw that Robert Grandison stood in front of me. It was he—fully in the flesh and with his coloring normal—who was holding my legs aloft to bring the blood back to my head as the school's first-aid course had taught him to do with persons who had fainted. For a moment I was struck mute by the stifling odor and by a bewilderment which quickly merged into a sense of triumph. Then I found myself able to move and speak collectedly.
I raised a tentative hand and waved feebly at Robert.
"All right, old man," I murmured, "you can let my legs down now. Many thanks. I'm all right again, I think. It was the smell—I imagine—that got me. Open that farthest window, please—wide—from the bottom. That's it—thanks. No—leave the shade down the way it was."
I struggled to my feet, my disturbed circulation adjusting itself in waves, and stood upright hanging to the back of a big chair. I was still "groggy," but a blast of fresh, bitterly cold air from the window revived me rapidly. I sat down in the big chair and looked at Robert, now walking toward me.
"First," I said hurriedly, "tell me, Robert—those others—Holm? What happened to them, when I—opened the exit?"
Robert paused half-way across the room and looked at me very gravely.