He seated himself in a cane armchair and, whilst the facts were fresh in his memory, made elaborate notes upon the recent conversation with the Greek. He had achieved almost more than he could have hoped for; but, knowing something of the elaborate organization of the opium group, he recognized that he owed some part of his information to the sense of security which this admirably conducted machine inspired in its mechanics. The introduction from Sir Brian Malpas had worked wonders, without doubt; and his own intimate knowledge of the establishment adjoining the Boulevard Beaumarchais, far from arousing the suspicions of Gianapolis, had evidently strengthened the latter's conviction that he had to deal with a confirmed opium slave. The French detective congratulated himself upon the completeness of his Paris operation. It was evident that the French police had succeeded in suppressing all communication between the detained members of the Rue St. Claude den and the head office--which he shrewdly suspected to be situated in London. So confident were the group in the self-contained properties of each of their branches that the raid of any one establishment meant for them nothing more than a temporary financial loss. Failing the clue supplied by the draft on Paris, the case, so far as he was concerned, indeed, must have terminated with the raiding of the opium house. He reflected that he owed that precious discovery primarily to the promptness with which he had conducted the raid--to the finding of the letter (the ONE incriminating letter) from Mr. King. Evidently the group remained in ignorance of the fact that the little arrangement at the Credit Lyonnais had been discovered. He surveyed--and his eyes twinkled humorously--a small photograph which was contained in his writing-case. It represented a very typical Parisian gentleman, with a carefully trimmed square beard and well brushed mustache, wearing pince-nez and a white silk knot at his neck. The photograph was cut from a French magazine, and beneath it appeared the legend: “M. Gaston Max, Service de Surete.” There was marked genius in the conspicuous dressing of M. Gaston Max, who, as M. Gaston, was now patronizing the Hotel Astoria. For whilst there was nothing furtive, nothing secret, about this gentleman, the closest scrutiny (and because he invited it, he was never subjected to it) must have failed to detect any resemblance between M. Gaston of the Hotel Astoria and M. Gaston Max of the Service de Surete. And which was the original M. Gaston Max? Was the M. Max of the magazine photograph a disguised M. Max? or was that the veritable M. Max, and was the patron of the Astoria a disguised M. Max? It is quite possible that M. Gaston Max, himself, could not have answered that question, so true an artist was he; and it is quite certain that had the occasion arisen he would have refused to do so.