"Yes, your waves come in at a frequency of approximately 1,832,956,000. That's as close as I can tune it so far, but that's plenty close enough. There are other characteristics, such as power and damping and height of crest and so on, that make it selective enough to pick out any one person in the United States if it could reach that far." "And then you can see everything I do?" "No, I can see only what you see with your own eyes." Then I must have been staring at the blonde. I held my breath when I asked, "Can you tell what I'm thinking?" "No." I breathed again. "I can translate what you say into language, though. Something happens when I throw two hundred and twenty volts into this bank of tubes. As near as I can figure, it creates a 'time-warp'--which doesn't mean much of anything objectively. I don't know how it works; I couldn't even duplicate it. I suppose some high-powered electronics engineer could figure it out, but I don't want anybody but you and me even to know about it. What I'm interested in is what we can do with it." "What I'm interested in," I said, "is how much money we can make with it." Slim looked at me with his great burning eyes while the steam rose from under the iron on my pants. "You're about to find out." The ground-glass screen slowly lighted. A new bank of tubes began to sparkle and then settled down into a greenish glow. Slim turned dials, and there was the figure of a woman on the screen. "That," said Slim, "is Mrs. Tom Ellingbery." Well, of course I couldn't see her face. She was playing bridge, apparently. Her hands looked nice. The woman at her left said, "I hear you've filed suit against your husband." Mrs. Ellingbery reached for a king, but her fingers were nervous. She played a six instead and lost the trick. "Yes," she said quietly, "I have." Her voice was sad. I waited a minute. Then, "How did you know how to tune in on her?" I asked Slim. "I got her wave-characteristics when she came up the other day to get us to serve the papers," he said. "I got Tom's today while we were talking. The machine was all set and the recording needles made a permanent record." I swallowed. "Can you get the landlord's characteristics too?" Slim held up a sheet of ruled paper. "Got his already. I was just practicing; I got him when he was trying to hammer the door down yesterday." Suddenly I felt a deep peace. I had the landlord in my power, now, and I didn't have to hurry; I could take my time. But Slim notched me down. "Get this hundred changed," he said. "Give the landlord fifty and then have the telephone connected again." I took the hundred. "Get some more sandwiches, too. We'll be here late tonight."