"I can only guess at the contents of those papers, for events have been taking place too swiftly for me to call for and obtain them. But they must deal with subjects closely connected with the activities of Kathulos. How he learned of them and of the provisions of the letter accompanying them, I have no idea, but as I said, London is honeycombed with his spies. "In my search for clues, I often frequented Limehouse disguised as you first saw me. I went often to the Temple of Dreams and even once managed to enter the back room, for I suspected some sort of rendezvous in the rear of the building. The absence of any exit baffled me and I had no time to search for secret doors before I was ejected by the giant black man Hassim, who had no suspicion of my true identity. I noticed that very often the leper entered or left Yun Shatu's, and finally it was borne on me that past a shadow of doubt this supposed leper was the Scorpion himself. "That night you discovered me on the couch in the opium room, I had come there with no especial plan in mind. Seeing Kathulos leaving, I determined to rise and follow him, but you spoiled that." He fingered his chin and laughed grimly. "I was an amateur boxing champion in Oxford," said he, "but Tom Cribb himself could not have withstood that blow--or have dealt it." "I regret it as I regret few things." "No need to apologize. You saved my life immediately afterward--I was stunned, but not too much to know that that brown devil Yussef Ali was burning to cut out my heart." "How did you come to be at Sir Haldred Frenton's estate? And how is it that you did not raid Yun Shatu's dive?" "I did not have the place raided because I knew somehow Kathulos would be warned and our efforts would come to naught. I was at Sir Haldred's that night because I have contrived to spend at least part of each night with him since he returned from the Congo. I anticipated an attempt upon his life when I learned from his own lips that he was preparing, from the studies he made on this trip, a treatise on the secret native societies of West Africa. He hinted that the disclosures he intended to make therein might prove sensational, to say the least. Since it is to Kathulos' advantage to destroy such men as might be able to arouse the Western world to its danger, I knew that Sir Haldred was a marked man. Indeed, two distinct attempts were made upon his life on his journey to the coast from the African interior. So I put two trusted men on guard and they are at their post even now. "Roaming about the darkened house, I heard the noise of your entry, and, warning my men, I stole down to intercept you. At the time of our conversation, Sir Haldred was sitting in his unlighted study, a Scotland Yard man with drawn pistol on each side of him. Their vigilance no doubt accounts for Yussef Ali's failure to attempt what you were sent to do.