"I guess I was to blame, sir," he said. "I fell into a trap like a new-joined cabbage-boy. This man, Ivan Abramovitch, must have known that he was followed by a couple of us, so he threw off Taylor, who was with me, very simply, by going into a big outfitter's place in the City. I dodged round to a second entrance and, sure enough, he came out there. I couldn't get word to Taylor, so I picked him up, and a pretty dance he led me through a maze of alleys up the side of Petticoat Lane and round about by the Whitechapel Road. You will know the sort of neighbourhood it is there. Well, I suppose I must have got a bit careless, for in taking a narrow twist in one of those alleys some one dropped on me from behind. I hit out and yelled, but I didn't get a second chance, for my head was bumped hard down on the pavement and I went to sleep for good and plenty. There were a couple of men in it, for I could hear 'em talking before I became properly unconscious. They dragged me along, linking their arms in mine, and we got into a cab. I guess the driver thought I was drunk, and that they were my pals helping me home. "When I came round my head was bandaged up, and I was in quite a decent little room, lying on a couch, with Mr. Ivan Abramovitch sitting opposite to me. I couldn't give a guess where it was, for the window only looked out on a blank wall. I sat up, and he grinned at me. "'I am a police officer,' I said. 'How did I get here?' "'I brought you,' he says with a grin. 'You were taking too great an interest in my doings for my liking. Now I am going to take an interest in yours.' "At that I jumped for him and got a knife through my arm for my pains. After he'd sworn at me like a trooper in English, French, and Russian for about ten minutes he bandaged up the cut with his handkerchief, and told me if I made any more fuss I was in for trouble. Some one knocked at the door, but he ordered them off. "'You won't get away from here alive without permission if I can help it,' he said; 'but if you do, you won't be able to identify any one but myself. If you take it coolly there'll be no harm come to you.' "I tried to bluff a bit, but he just laughed. And then I stayed with him in the same room up to within an hour or two ago, when some one came into the house and he was summoned outside the door. They had an excited pow-wow, and I could hear a woman talking. Finally, the man came back and told me they'd determined to let me go. He put a handkerchief over my eyes, and after a while I was taken down into what I thought was a taxicab. I was turned out a quarter of an hour ago at the Blackfriars end of the Embankment." Foyle was by now striding up and down the office, his hands thrust deep in his trousers pockets. He paused long enough to blow down a speaking-tube and put a quick question. "What was the number of the cab?" "It had no police number. Its index mark was A.A. 4796."