"Nay,
He opened his hand and exhibited a bit of silk, evidently torn from his sash. On it lay a crushed object that Harrison did not recognize. But Joan recoiled with a low cry.
"God! A black scorpion of Assam!"
"Aye—whose sting is death. I saw it running up and down before the door, seeking entrance. Another man might have stepped upon it without seeing it, but I was on my guard, for I smelled the Flower of Death as I came up the stairs. I saw the thing at the door and crushed it before it could sting me."
"What do you mean by the Flower of Death?" demanded Harrison.
"It grows in the jungles where these vermin abide. Its scent attracts them as wine draws a drunkard. A trail of the juice had somehow been laid to this door. Had the door been opened before I slew it, it would have darted in and struck whoever happened to be in its way."
Harrison swore under his breath, remembering the faint scratching noise Joan had heard outside the door.
"I get it now! They put a bottle of that juice on the stairs where it was sure to be stepped on. I did step on it, and broke it, and got the liquid on my shoe. Then I tracked down the stairs, leaving the scent wherever I stepped. Came back upstairs, stepped in the stuff again and tracked it on through the door. Then somebody downstairs turned that scorpion loose—the devil!! That means they've been in this house since I was downstairs!—may be hiding somewhere here now! But somebody had to come into the office to put the scorpion on the trail—I'll ask the clerk—"
"He sleeps like the dead," said Khoda Khan. "He did not waken when I entered and mounted the stairs. What matters if the house is full of Mongols? These doors are strong, and I am alert!" From beneath his coat he drew the terrible Khyber knife—a yard long, with an edge like a razor. "I have slain
"Well," grunted Harrison. "I've got an appointment that's overdue now. I feel queer walking out and leaving you two to fight these devils alone. But there'll be no safety for us until I've smashed this gang at its root, and that's what I'm out to do."
"They'll kill you as you leave the building," said Joan with conviction.
"Well, I've got to risk it. If you're attacked call the police anyway, and call me, at Shan Yang's joint. I'll come back here some time before dawn. But I'm hoping the tip I expect to get will enable me to hit straight at whoever's after us."
He went down the hallway with an eerie feeling of being watched and scanned the stairs as if he expected to see it swarming with black scorpions, and he shied wide of the broken glass on the step. He had an uncomfortable sensation of duty ignored, in spite of himself, though he knew that his two companions did not want the police, and that in dealing with the East it is better to heed the advice of the East.
The clerk still sagged behind his desk. Harrison shook him without avail. The man was not asleep; he was drugged. But his heartbeat was regular, and the detective believed he was in no danger. Anyway, Harrison had no more time to waste. If he kept Johnny Kleck waiting too long, the fellow might become panicky and bolt, to hide in some rat-run for weeks.
He went into the street, where the lamps gleamed luridly through the drifting river mist, half expecting a knife to be thrown at him, or to find a cobra coiled on the seat of his automobile. But he found nothing his suspicion anticipated, even though he lifted the hood and the rumble-seat to see if a bomb had been planted. Satisfying himself at last, he climbed in and the girl watching him through the slits of a third-story shutter sighed relievedly to see him roar away unmolested.
Khoda Khan had gone through the rooms, giving approval in his beard of the locks, and having extinguished the lights in the other chambers he returned to the drawing room, where he turned out all lights there except one small desk lamp. It shed a pool of light in the center of the room, leaving the rest in shadowy vagueness.
"Darkness baffles rogues as well as honest men," he said sagely, "and I see like a cat in the dark."
He sat cross-legged near the door that let into the bedroom, which he left partly open. He merged with the shadows so that all of him Joan could make out with any distinctness was his turban and the glimmer of his eyes as he turned his head.
"We will remain in this room,
