As I passed the tall man who sat by the brazier I felt a sudden pluck at my skirt, and a low voice whispered, "Walk past me, and then look back at me." The words fell quite distinctly upon my ear.

I glanced down.

They could only have come from the old man at my side, and yet he sat now as absorbed as ever, very thin, very wrinkled, bent with age, an opium pipe dangling down from between his knees, as though it had dropped in sheer lassitude from his fingers.

I took two steps forward and looked back.

It took all my self-control to prevent me from breaking out into a cry of astonishment.