"I'll do that," Stan lied. He checked his heat gun, then worked the dial on the hoop once more and stepped through the shining oval.... ... onto a street on Chicago's south side, a few doors down from the Hyde Park theatre. He walked into a nearby drug store and made a phone call, then walked back to the corner to wait. A moment later, one of his chief lieutenants, Caldwell, drove up. "We lost Jones and Hagerty, Mr. Martin--just a few hours ago. I was making up a report on them when you called." "You got the indicator?" The man held out a small gadget that looked a little like a light meter. Stan swung it around experimentally. A small light mounted on it flickered briefly. He swung it back again and the light glowed, went out, and then glowed strongly again. "You know, I don't see how you trace a person with that," Caldwell said, curious. "How does it work?" There were a lot of things that Caldwell didn't know, Stan thought. He didn't know that the deal was anything more than a smuggling operation, he didn't realize that this was not a gang war but was one for much higher stakes but if his curiosity kept up, some day he would stumble on the truth. Which would be rather fatal for Mr. Caldwell. "You're paid for what you do, Caldwell, not for being curious." "Okay, okay--I just asked." Stan slid into the back seat. "Let's go." Caldwell threw the car in gear and they drove silently north through the crowded streets. The light on the small indicator waxed and waned and grew steadily brighter as the faint radiation from the fusion material increased. "You don't want to get too close," Caldwell said suddenly. "That's what happened to the other boys. They got too close and then they were ambushed." The indicator light slowly increased in brilliance, then started to die again. They were about three blocks away, Stan thought, passing it at right angles. "Okay, Caldwell, let me out here." "You sure you won't need help, Mr. Martin? I could get some of the boys...." "Wait on the corner. If I'm not back in an hour, then notify Tanner. He'll know what to do." He got out of the car, palming the indicator in his hand. Avis--or at least the package--was somewhere in the area. He glanced at the indicator and started walking, stopping occasionally to look in a store window and steal another look at the indicator. A block and a half down. One door, two doors.... And back one. An office building. The usual miscellany--dentists and doctors and small professional firms. He walked in, his eyes documenting everybody in the lobby. Any two or three of the men idling in the lobby could be her men, he thought. And if any one of them had made a false movement, there would have been a sudden massacre. "Top floor, please." The elevator crept slowly up and let him out on the fifth floor. The reaction on the indicator was strong. He went down to the fourth floor where it was stronger, then down to the third.