That Fu-Manchu possessed a preparation for producing artificial catalepsy, of a sort indistinguishable from death, I was well aware. A dose of this unknown drug had doubtless been contained in the cognac (if, indeed, the decanter had held cognac) that the prisoner had drunk at the time of his arrest. The "yellow stuff" spoken of by Morrison I recognized as the antidote (another secret of the brilliant Chinese doctor), a portion of which I had once, some years before, actually had in my possession. The "dead man" had not been carried up the ladder; he had climbed up!

"Now, Morrison," snapped Nayland Smith, "you have acted wisely thus far. Make a clean breast of it. How much were you paid for the job?"

"Twenty pounds, sir" answered the man promptly, "and I'd have done it for less, because I could see no harm in it, the prisoner being dead, and this his last request."

"And who paid you?"

Now we were come to the nub of the matter, as the change in the man's face revealed. He hesitated momentarily, and Colonel Warrington brought his fist down on the table with a bang. Morrison made a sort of gesture of resignation at that, and—

"When I was in the Army, sir, stationed at Cairo," he said slowly, "I regret to confess that I formed a drug habit."

"Opium?" snapped Smith.

"No, sir, hashish."

"Good God! Go on."

"There's a place in Soho, just off Frith Street, where hashish is supplied, and I go there sometimes. Mr. Samarkan used to come, and bring people with him—from the New Louvre Hotel, I believe. That's where I met him."