As a matter of fact, Seton Pasha, acting upon a suggestion of Margaret’s had been to Brixton Prison to interview Juan Mareno who lay there under arrest. Contents bills announcing this arrest as the latest public development in the Bond Street murder case were to be seen upon every newstand; yet the problem of that which had brought Seton to the south of London was one with which Kerry grappled in vain. He had parted from the Home office agent in the early hours of the morning, and their parting had been one of mutual despair which neither had sought to disguise. It was a coincidence which a student of human nature might have regarded as significant, that whereas Kerry had taken his troubles home to his wife, Seton Pasha had sought inspiration from Margaret Halley; and whereas the guidance of Mary Kerry had led the Chief Inspector to hurry in quest of Rita Irvin’s spaniel, the result of Seton’s interview with Margaret had been an equally hurried journey to the big jail. Unhappily Seton had failed to elicit the slightest information from the saturnine Mareno. Unmoved alike by promises or threats, he had coolly adhered to his original evidence. So, while the authorities worked feverishly and all England reading of the arrest of Mareno inquired indignantly, “But who is Kazmah, and where is Mrs. Monte Irvin?” Sin Sin Wa placidly pursued his arrangements for immediate departure to the paddyfields of Ho-Nan, and sometimes in the weird crooning voice with which he addressed the raven he would sing a monotonous chant dealing with the valley of the Yellow River where the opium-poppy grows. Hidden in the cunning vault, the search had passed above him; and watchful on a quay on the Surrey shore whereto his dinghy was fastened, George Martin awaited the signal which should tell him that Kazmah and Company were ready to leave. Any time after dark he expected to see the waving lantern and to collect his last payment from the traffic. At the very hour that Kerry was hastening to Prince’s Gate, Sin Sin Wa sat before the stove in the drug cache, the green-eyed joss upon his knee. With a fragment of chamois leather he lovingly polished the leering idol, crooning softly to himself and smiling his mirthless smile. Perched upon his shoulder the raven studied this operation with apparent interest, his solitary eye glittering bead-like. Upon the opposite side of the stove sat the ancient Sam Tûk and at intervals of five minutes or more he would slowly nod his hairless head. The sliding door which concealed the inner room was partly open, and from the opening there shone forth a dim red light, cast by the paper-shaded lamp which illuminated the place. The coarse voice of the Cuban-Jewess rose and fell in a ceaseless half-muttered soliloquy, indescribably unpleasant but to which Sin Sin Wa was evidently indifferent.