_Morbleu!_ quick as I was the car was there before me! But I had not overlooked this possibility and I had dismounted at a good distance from the house and had left the "Indian" in someone's front garden. As I had turned out of the main road I had seen Dr. Stuart and Inspector Dunbar approaching a rank upon which two or three cabs usually stood. I watched _la Bell_ Zara enter the house, a beautiful woman most elegantly attired, and then, even before Chunda Lal had backed the car into the lane I was off ... to the spot at which I had abandoned my motor bicycle. In little more than half an hour I had traversed London, and was standing in the shadow of that high, blank wall to which I have referred as facing a row of wooden houses in a certain street adjoining Limehouse Causeway. You perceive my plan? I was practically sure of the street; all I had to learn was which house sheltered "The Scorpion"! I had already suspected that this night was to be for me an unlucky night. _Nom d'un p'tit bon-homme!_ it was so. Until an hour before dawn I crouched under that wall and saw no living thing except a very old Chinaman who came out of one of the houses and walked slowly away. The other houses appeared to be empty. No vehicle of any kind passed that way all night. Turning over in my mind the details of this most perplexing case, it became evident to me that the advantages of working alone were now outweighed by the disadvantages. The affair had reached a stage at which ordinary police methods should be put into operation. I had collected some of the threads; the next thing was for Scotland Yard to weave these together whilst I sought for more. I determined to remain dead. It would afford me greater freedom of action. The disappearance of "Le Balafre" which must by this time have been noted by his associates, might possibly lead to a suspicion that the dead man was _not_ Gaston Max; but providing no member of "The Scorpion" group obtained access to the body I failed to see how this suspicion could be confirmed. I reviewed my position. The sealed letter had achieved its purpose in part. Although I had failed to locate the house from which these people operated, I could draw a circle on the map within which I knew it to be; and I had learned that Zara el-Khala and the Hindu were in London. What it all meant--to what end "The Scorpion" was working I did not know. But having learned so much, be sure I did not despair of learning more. It was now imperative that I should find out exactly what had occurred at Dr. Stuart's house. Accordingly I determined to call upon the Inspector at Scotland Yard. I presented myself towards evening of the day following my vigil in Limehouse, sending up the card of a Bureau confrere, for I did not intend to let it be generally known that I was alive.