HOW I OBTAINED IT Leaving the dock gates behind me I tramped through the steady drizzle, going parallel with the river and making for the Chinese quarter. The hour was about half-past eleven on one of those September nights when, in such a locality as this, a stifling quality seems to enter the atmosphere, rendering it all but unbreathable. A mist floated over the river, and it was difficult to say if the rain was still falling, indeed, or if the ample moisture upon my garments was traceable only to the fog. Sounds were muffled, lights dimmed, and the frequent hooting of sirens from the river added another touch of weirdness to the scene. Even when the peculiar duties of my friend, Paul Harley, called him away from England, the lure of this miniature Orient which I had first explored under his guidance, often called me from my chambers. In the house with the two doors in Wade Street, Limehouse, I would discard the armour of respectability, and, dressed in a manner unlikely to provoke comment in dockland, would haunt those dreary ways sometimes from midnight until close upon dawn. Yet, well as I knew the district and the strange and often dangerous creatures lurking in its many burrows, I experienced a chill partly physical and partly of apprehension to-night; indeed, strange though it may sound, I hastened my footsteps in order the sooner to reach the low den for which I was bound--Malay Jack's--a spot marked plainly on the crimes-map and which few respectable travellers would have regarded as a haven of refuge. But the chill of the adjacent river, and some quality of utter desolation which seemed to emanate from the deserted wharves and ramshackle buildings about me, were driving me thither now; for I knew that human companionship, of a sort, and a glass of good liquor--from a store which the Customs would have been happy to locate--awaited me there. I might chance, too, upon Durham or Wessex, of New Scotland Yard, both good friends of mine, or even upon the Terror of Chinatown, Chief Inspector Kerry, a man for whom I had an esteem which none of his ungracious manners could diminish. I was just about to turn to the right into a narrow and nameless alley, lying at right angles to the Thames, when I pulled up sharply, clenching my fists and listening.