“All right, all right!” came a shaky voice from within. “I'm coming.” Harley released the knocker, and, turning to me: “Ma Lorenzo,” he whispered. “Don't make any mistakes.” Indeed, even as he warned me, heralded by a creaking of bolts and the rattling of a chain, the door was opened by a fat, shapeless, half-caste woman of indefinite age; in whose dark eyes, now sunken in bloated cheeks, in whose full though drooping lips, and even in the whole overlaid contour of whose face and figure it was possible to recognize the traces of former beauty. This was Ma Lorenzo, who for many years had lived at that address with old Kwen Lung, of whom strange stories were told in Chinatown. As Bill Jones, A.B., my friend, Paul Harley, was well known to Ma Lorenzo as he was well known to many others in that strange colony which clusters round the London docks. I sometimes enjoyed the privilege of accompanying my friend on a tour of investigation through the weird resorts which abound in that neighbourhood, and, indeed, we had been returning from one of these Baghdad nights when our present adventure had been thrust upon us. Assuming a wild and boisterous manner which he had at command: “'Urry up, Ma!” said Harley, entering without ceremony; “I want to introduce my pal Jim 'ere to old Kwen Lung, and make it all right for him before I sail.” Ma Lorenzo, who was half Portuguese, replied in her peculiar accent: “This no time to come waking me up out of bed!” But Harley, brushing past her, was already inside the stuffy little room, and I hastened to follow. “Kwen Lung!” shouted my friend loudly. “Where are you? Brought a friend to see you.” “Kwen Lung no hab,” came the complaining tones of Ma Lorenzo from behind us. It was curious to note how long association with the Chinese had resulted in her catching the infection of that pidgin-English which is a sort of esperanto in all Asiatic quarters. “Eh!” cried my friend, pushing open a door on the right of the passage and stumbling down three worn steps into a very evil-smelling room. “Where is he?” “Go play fan-tan. Not come back.” Ma Lorenzo, having relocked the street door, had rejoined us, and as I followed my friend down into the dim and uninviting apartment she stood at the top of the steps, hands on hips, regarding us. The place, which was quite palpably an opium den, must have disappointed anyone familiar with the more ornate houses of Chinese vice in San Francisco and elsewhere. The bare floor was not particularly clean, and the few decorations which the room boasted were garishly European for the most part. A deep divan, evidently used sometimes as a bed, occupied one side of the room, and just to the left of the steps reposed the only typically Oriental object in the place.