“I perceived,” said M. Gaston Max, “that owing to the progress of the work of demolition, and owing to the carelessness of the people in charge—nom d'un nom! they were careless, those!—I was able, from a certain point, to look into a small room fitted up in a way very curious. There was a sort of bunk somewhat similar to that in a steamer berth, and the walls were covered with paper of a Chinese pattern most bizarre. No one was in the room when I first perceived it, but I had not been looking in for many moments before a Chinaman entered and closed the shutters. He was hasty, this one.  
“Eh bien! I had seen enough. I perceived that my visit to the house of Cagliostro had been dictated by a good little angel. It happened that for many months I had been in quest of the headquarters of a certain group which I knew, beyond any tiny doubt, to have its claws deep in Parisian society. I refer to an opium syndicate”...
 
Dr. Cumberly started and seemed about to speak; but he restrained himself, bending forward and awaiting the detective's next words with even keener interest than hitherto.
 
“I had been trying—all vainly—to trace the source from which the opium was obtained, and the place where it was used. I have devoted much attention to the subject, and have spent some twelve months in the opium provinces of China, you understand. I know how insidious a thing it is, this opium, and how dreadful a curse it may become when it gets a hold upon a community. I was formerly engaged upon a most sensational case in San Francisco; and the horrors of the discoveries which we made there—the American police and myself—have remained with me ever since. Pardieu! I cannot forget them! Therefore when I learnt that an organized attempt was being made to establish elaborate opium dens upon a most up-to-date plan, in Paris, I exerted myself to the utmost to break up this scheme in its infancy”...
 
Dr. Cumberly was hanging upon every word.
 
“Apart from the physical and moral ruin attendant upon the vice,” continued Max, “the methods of this particular organization have brought financial ruin to many.” He shook his finger at Dr. Cumberly as if to emphasize his certainty upon this point. “I will not go into particulars now, but there is a system of wholesale robbery—sapristi! of most ingenious brigandage—being practised by this group. Therefore I congratulated myself upon the inspiration which had led me to mount Cagliostro's staircase. The way in which these people had conducted their sinister trade from so public a spot as this was really wonderful, but I had already learned to respect the ingenuity of the group, or of the man at the head of it. I wasted no time; not I! We raided the house that evening”...
 
“And what did you find?” asked Dr. Cumberly, eagerly.
 
“We found this establishment elaborately fitted, and the whole of the fittings were American. Eh bien! This confirmed me in my belief that the establishment was a branch of the wealthy concern I have mentioned in San Francisco. There was also a branch in New York, apparently. We found six or eight people in the place in various stages of coma; and I cannot tell you their names because—among them, were some well-known in the best society”...
 
“Good Heavens, M. Max, you surprise and shock me!”
 
“What I tell you is but the truth. We apprehended two low fellows who acted as servants sometimes in the place. We had records of both of them at the Bureau. And there was also a woman belonging to the same class. None of these seemed to me very important, but we were fortunate enough to capture, in addition, a Chinaman—Sen—and a certain Madame Jean—the latter the principal of the establishment!”
 
“What! a woman?”
 
“Morbleu! a woman—exactly! You are surprised? Yes; and I was surprised, but full inquiry convinced me that Madame Jean was the chief of staff. We had conducted the raid at night, of course, and because of the big names, we hushed it up. We can do these things in Paris so much more easily than is possible here in London.” He illustrated, delivering a kick upon the person of an imaginary malefactor. “Cochon! Va!” he shrugged. “It is finished!
 
“The place was arranged with Oriental magnificence. The reception-room—if I can so term that apartment—was like the scene of Rimsky Korsakov's Sheherezade; I could see that very heavy charges were made at this establishment. I will not bore you with further particulars, but I will tell you of my disappointment.”
 
“Your disappointment?”
 
“Yes, I was disappointed. True, I had brought about the closing of that house, but of the huge sums of money fraudulently obtained from victims, I could find no trace in the accounts of Madame Jean. She defied me with silence, simply declining to give any account of herself beyond admitting that she conducted an hotel at which opium might be smoked if desired. Blagueur! Sen, the Chinaman, who professed to speak nothing but Chinese—ah! cochon!—was equally a difficult case, Nom d'un nom! I was in despair, for apart from frauds connected with the concern, I had more than small suspicions that at least one death—that of a wealthy banker—could be laid at the doors of the establishment in Rue St. Claude.”...
 
Dr. Cumberly bent yet lower, watching the speaker's face.
 
“A murder!” he whispered.
 
“I do not say so,” replied Max, “but it certainly might have been. The case then must, indeed, have ended miserably, as far as I was concerned, if I had not chanced upon a letter which the otherwise prudent Madame Jean had forgotten to destroy. Triomphe! It was a letter of instruction, and definitely it proved that she was no more than a kind of glorified concierge, and that the chief of the opium group was in London.”
 
“Undoubtedly in London. There was no address on the letter, and no date, and it was curiously signed: Mr. King.”
 
“Mr. King!”
 
Dr. Cumberly rose slowly from his chair, and took a step toward M. Max.
 
“You are interested?” said the detective, and shrugged his shoulders, whilst his mobile mouth shaped itself in a grim smile. “Pardieu! I knew you would be! Acting upon another clue which the letter—priceless letter—contained, I visited the Credit Lyonnais. I discovered that an account had been opened there by Mr. Henry Leroux of London on behalf of his wife, Mira Leroux, to the amount of a thousand pounds.”
 
“A thousand pounds—really!” cried Dr. Cumberly, drawing his heavy brows together—“as much as that?”
 
“Certainly. It was for a thousand pounds,” repeated Max, “and the whole of that amount had been drawn out.”
 
“The whole thousand?”
 
“The whole thousand; nom d'un p'tit bonhomme! The whole thousand! Acting, as I have said, upon the information in this always priceless letter, I confronted Madame Jean and the manager of the bank with each other. Morbleu! 'This,' he said, 'is Mira Leroux of London!'”...
 
“What!” cried Cumberly, seemingly quite stupefied by this last revelation.
 
Max spread wide his palms, and the flexible lips expressed sympathy with the doctor's stupefaction.
 
“It is as I tell you,” he continued. “This Madame Jean had been posing as Mrs. Leroux, and in some way, which I was unable to understand, her signature had been accepted by the Credit Lyonnais. I examined the specimen signature which had been forwarded to them by the London County and Suburban Bank, and I perceived, at once, that it was not a case of common forgery. The signatures were identical”...
 
“Therefore,” said Cumberly, and he was thinking of Henry Leroux, whom Fate delighted in buffeting—“therefore, the Credit Lyonnais is not responsible?”
 
“Most decidedly not responsible,” agreed Max. “So you see I now have two reasons for coming to London: one, to visit the London County and Suburban Bank, and the other to find... Mr. King. The first part of my mission I have performed successfully; but the second”... again he shrugged, and the lines of his mouth were humorous.
 
Dr. Cumberly began to walk up and down the carpet.
 
“Poor Leroux!” he muttered—“poor Leroux.”
 
“Ah! poor Leroux, indeed,” said Max. “He is so typical a victim of this most infernal group!”
 
“What!” Dr. Cumberly turned in his promenade and stared at the detective—“he's not the only one?”
 
“My dear sir,” said Max, gently, “the victims of Mr. King are truly as the sands of Arabia.”
 
“Good heavens!” muttered Dr. Cumberly; “good heavens!”
 
“I came immediately to London,” continued Max, “and presented myself at New Scotland Yard. There I discovered that my inquiry was complicated by a ghastly crime which had been committed in the flat of Mr. Leroux; but I learned, also, that Mr. King was concerned in this crime—his name had been found upon a scrap of paper clenched in the murdered woman's hand!”
 
“I was present when it was found,” said Dr. Cumberly.
 
“I know you were,” replied Max. &ld............