"God knows what is afoot this time, Petrie!" he replied. "You and I have lived no commonplace lives; Dr. Fu-Manchu has seen to that; but if I am to believe what the Chief has told me to-day, even stranger things are ahead of us!"

I stared at him wonder-stricken.

"That is almost incredible," I said; "terror can have no darker meaning than that which Dr. Fu-Manchu gave to it. Fu-Manchu is dead, so what have we to fear?"

"We have to fear," replied Smith, throwing himself into a corner of the settee, "the Si-Fan!"

I continued to stare, uncomprehendingly.

"The Si-Fan——"

"I always knew and you always knew," interrupted Smith in his short, decisive manner, "that Fu-Manchu, genius that he was, remained nevertheless the servant of another or others. He was not the head of that organization which dealt in wholesale murder, which aimed at upsetting the balance of the world. I even knew the name of one, a certain mandarin, and member of the Sublime Order of the White Peacock, who was his immediate superior. I had never dared to guess at the identity of what I may term the Head Center."

He ceased speaking, and sat gripping his pipe grimly between his teeth, whilst I stood staring at him almost fatuously. Then—

"Evidently you have much to tell me," I said, with forced calm.

I drew up a chair beside the settee and was about to sit down.