Gripping the Browning with nervous fingers I waited, listening intently; but the silence remained unbroken. My gaze set upon the spot where the head of this midnight visitant might be expected to appear, I almost held my breath during the ensuing moments of frightful suspense.
The door was opening; slowly—slowly—by almost imperceptible degrees. I held the pistol pointed rigidly before me and my gaze remained fixed intently on the dimly seen opening. I suppose I acted as ninety-nine men out of a hundred would have done in like case. Nothing appeared.
Then a voice—a voice that seemed to come from somewhere under the floor snapped:—
"Good God! it's Petrie!"
I dropped my gaze instantly … and there, looking up at me from the floor at my feet, I vaguely discerned the outline of a human head!
"Smith!" I whispered.
Nayland Smith—for indeed it was none other—stood up and entered the room.
"Thank God you are safe, old man," he said. "But in waiting for one who is stealthily entering a room, don't, as you love me, take it for granted that he will enter upright. I could have shot you from the floor with ease! But, mercifully, even in the darkness, I recognized your Arab slippers!"
"Smith," I said, my heart beating wildly, "I thought you were drugged— murdered. The port contained an opiate."
"I guessed as much!" snapped Smith. "But despite the excellent tuition of Dr. Fu-Manchu, I am still childishly trustful; and the fact that I did not partake of the crusted '45 was not due to any suspicions which I entertained at that time."