I began a whispered question, but Smith tugged at my arm to silence me. His excitement was intense. Had his keener powers enabled him to recognize the unknown?
A faint but most peculiar perfume stole to my nostrils, a perfume which seemed to contain the very soul of Eastern mystery. Only one woman known to me used that perfume-Karamaneh.
Then it was she!
At last my friend's vigilance had been rewarded. Eagerly I bent forward. Smith literally quivered in anticipation of a discovery. Again the strange perfume was wafted to our hiding-place; and, glancing neither to right nor left, I saw Karamaneh-for that it was she I no longer doubted-recross the room and disappear.
"The man she spoke to," hissed Smith. "We must see him! We must have him!"
He pulled the mat aside and stepped out into the anteroom. It was empty. Down the passage he led, and we were almost come to the door of the big room when it was thrown open and a man came rapidly out, opened the street door before Smith could reach him, and was gone, slamming it fast.
I can swear that we were not four seconds behind him, but when we gained the street it was empty. Our quarry had disappeared as if by magic. A big car was just turning the corner towards Leicester Square.
"That is the girl," rapped Smith; "but where in Heaven's name is the man to whom she brought the message? I would give a hundred pounds to know what business is afoot. To think that we have had such an opportunity and have thrown it away!"
Angry and nonplused he stood at the corner, looking in the direction of the crowded thoroughfare into which the car had been driven, tugging at the lobe of his ear, as was his habit in such moments of perplexity, and sharply clicking his teeth together. I, too, was very thoughtful. Clews were few enough in those days of our war with that giant antagonist. The mere thought that our trifling error of judgment tonight in tarrying a moment too long might mean the victory of Fu-Manchu, might mean the turning of the balance which a wise providence had adjusted between the white and yellow races, was appalling.
To Smith and me, who knew something of the secret influences at work to overthrow the Indian Empire, to place, it might be, the whole of Europe and America beneath an Eastern rule, it seemed that a great yellow hand was stretched out over London. Doctor Fu-Manchu was a menace to the civilized world. Yet his very existence remained unsuspected by the millions whose fate he sought to command.
"Into what dark scheme have we had a glimpse?" said Smith. "What State secret is to be filched? What faithful servant of the British Raj to be spirited away? Upon whom now has Fu-Manchu set his death seal?"
"Karamaneh on this occasion may not have been acting as an emissary of the Doctor's."
"I feel assured that she was, Petrie. Of the many whom this yellow cloud may at any moment envelop, to which one did her message refer? The man's instructions were urgent. Witness his hasty departure. Curse it!" He dashed his right clenched fist into the palm of his left hand. "I never had a glimpse of his face, first to last. To think of the hours I have spent in that place, in anticipation of just such a meeting-only to bungle the opportunity when it arose!" Scarce heeding what course we followed, we had come now to Piccadilly Circus, and had walked out into the heart of the night's traffic. I just dragged Smith aside in time to save him from the off-front wheel of a big Mercedes. Then the traffic was blocked, and we found ourselves dangerously penned in amidst the press of vehicles.
Somehow we extricated ourselves, jeered at by taxi-drivers, who naturally took us for two simple Oriental visitors, and just before that impassable barrier the arm of a London policeman was lowered and the stream moved on a faint breath of perfume became perceptible to me.
The cabs and cars about us were actually beginning to move again, and there was nothing for it but a hasty retreat to the curb. I could not pause to glance behind, but instinctively I knew that someone-someone who used that rare, fragrant essence-was leaning from the window of the car.
"ANDAMAN-SECOND!" floated a soft whisper.
We gained the pavement as the pent-up traffic roared upon its way.
Smith had not noticed the perfume worn by the unseen occupant of the car, had not detected the whispered words. But I had no reason to doubt my senses, and I knew beyond question that Fu-Manchu's lovely slave, Karamaneh, had been within a yard of us, had recognized us, and had uttered those words for our guidance.
On regaining my rooms, we devoted a whole hour to considering what "ANDAMAN-SECOND" could possibly mean.
"Hang it all!" cried Smith, "it might mean anything-the result of a race, for instance."
He burst into one of his rare laughs, and began to stuff broadcut mixture into his briar. I could see that he had no intention of turning in.
"I can think of no one-no one of note-in London at present upon whom it is likely that Fu-Manchu would make an attempt," he said, "except ourselves."
We began methodically to go through the long list of names which we had compiled and to review our elaborate notes. When, at last, I turned in, the night had given place to a new day. But sleep evaded me, and "ANDAMAN-SECOND" danced like a mocking phantom through my brain.
Then I heard the telephone bell. I heard Smith speaking.
A minute afterwards he was in my room, his face very grim.
"I knew as well as if I'd seen it with my own eyes that some black business was afoot last night," he said. "And it was. Within pistol-shot of us! Someone has got at Frank Norris West. Inspector Weymouth has just been on the 'phone."
"Norris West!" I cried, "the American aviator-and inventor-" "Of the West aero-torpedo-yes. He's been offering it to the English War Office, and they have delayed too long."
I got out of bed.
"What do you mean?"
"I mean that the potentialities have attracted the attention of Dr. Fu-Manchu!"
Those words operated electrically. I do not know how long I was in dressing, how long a time elapsed ere the cab for which Smith had 'phoned arrived, how many precious minutes were lost upon the journey; but, in a nervous whirl, these things slipped into the past, like the telegraph poles seen from the window of an express, and, still in that tense state, we came upon the scene of this newest outrage.
Mr. Norris West, whose lean, stoic face had latterly figured so often in the daily press, lay upon the floor in the little entrance hall of his chambers, flat upon his back, with the telephone receiver in his hand.
The outer door had been forced by the police. They had had to remove a piece of the paneling to get at the bolt. A medical man was leaning over the recumbent figure in the striped pajama suit, and Detective-Inspector Weymouth stood watching him as Smith and I entered.
"He has been heavily drugged," said the Doctor, sniffing at West's lips, "but I cannot say what drug has been used. It isn't chloroform or anything of that nature. He can safely be left to sleep it off, I think."
I agreed, after a brief examination.
"It's most extraordinary," said Weymouth. "He rang up the Yard about an hour ago and said his chambers had been invaded by Chinamen. Then the man at the 'phone plainly heard him fall. When we got here his front door was bolted, as you've seen, and the windows are three floors up. Nothing is disturbed."
"The plans of the aero-torpedo?" rapped Smith.
"I take it they are in the safe in his bedroom," replied the detective, "and that is locked all right. I think he must have taken an overdose of something and had illusions. But in case there was anything in what he mumbled (you could hardly understand him) I thought it as well to send for you."
"Quite right," said Smith rapidly. His eyes shone like steel. "Lay him on the bed, Inspector."