Ah Wu looked disappointed, for Yung How was a rich man as Chinamen went, who paid for his night's entertainment in brand new Hong-Kong dollars.

"Ah Wu," said Yung How, in a low voice, "I desire to speak with you upon a matter which is private. It will be worth your while to help me if you can."

Ah Wu's eyes glistened. He rubbed his hands together. "Come with me," said he.

He drew aside a heavy, richly embroidered curtain and, passing through, they found themselves in the opium den. This was a room of two stories, with a flight of stairs in the middle leading to the upper story, which was a kind of balcony. All around the walls, both upstairs and downstairs, were couches, and by the side of each couch was a small lacquer table. Upon every table was an opium pipe, a small bowl containing a substance that resembled treacle, and a little spirit-lamp. And upon each couch was a man, stretched at full length, wearing no more clothes than a kind of towel tied around his waist, for the heat of the room was like that of a Turkish bath.

Some of these men were engaged in smoking, rolling the opium into little pills, holding these pills over the flame of the spirit-lamp until they frizzled in the heat. Some were lying flat upon their backs, with their arms folded behind their heads, staring with eyes wide open at the ceiling. Others were motionless, insensible, asleep--drugged into oblivion. The room reeked with the pungent smell of the drug.

Yung How, taking no notice of the occupants of the den, followed the proprietor into a small room under the stairs. There a paraffin lamp of European manufacture burned upon a table. Ah Wu offered his guest a chair and seated himself on the opposite side of the table. He produced a matchbox from the sleeve of his coat, struck a match, and lighted a small spirit-lamp. This, together with a bowl of opium and a large ivory pipe, he shoved across the table.

"You will smoke?" he asked.

Yung How could not resist the temptation. He snatched up the little skewer and dived it into the brown glutinous substance.

"Thank you," said he. "I can think better when I smoke. The matter of which I have to tell you, Ah Wu, is of some importance. It may be very profitable to me, and also, in some degree, to you--if you are able to assist me."

Ah Wu's little almond-shaped eyes glistened more than ever. His face became wreathed in smiles. He got to his feet and went to a cupboard, from which he produced his own opium pipe. Then he seated himself again at the table, and with their heads very close together these two sleek, shaven, unmitigated rascals rolled their little pills and filled the room with bitter-smelling smoke.