Ronny stared at him blankly. “But commercial representatives, cultural exchange—” The priest said flatly, “No. None at all. All commerce was handled through UP. We encouraged no cultural exchanges. We wished to keep our people uncorrupted. United Planets alone had the right to land on our one spaceport.” The Section G agent came to his feet. This was much simpler than he could ever have hoped for. He thanked the other, but avoided the necessity of shaking hands, and left. ------------------------------------- He found a helio-cab and dialed it to the UP building, finding strange the necessity of slipping coins into the vehicle’s slots until the correct amount for his destination had been deposited. Coinage was no longer in use on Earth. At the UP building he retraced his steps of the day before to the single office of Section G. To his surprise, not only Mouley Hassan was there, but Tog as well. Hassan had evidently had at least a few hours of sleep. He was in better shape. They exchanged the usual amenities and took their chairs again. Hassan said, “We were just gossiping. It’s been years since I’ve been in Greater Washington. Lee Chang tells me that Sid Jakes is now a Supervisor. I worked with him for a while, when I first joined Section G. How about a glass of wine?” Ronny said, “Look. If Tommy Paine was connected with this, and it’s almost positive he was, we’ve got him.” The others looked at him. “You’ve evidently been busy,” Tog said mildly. He turned to her. “He’s trapped, Tog! He can’t get off the planet.” Mouley Hassan rubbed a hand through his hair. “It’d be hard, all right. They’ve got the people under rein here such as you’ve never seen before. Or they did until this blew up.” Ronny sketched the situation to Tog, winding up with, “The only thing that makes sense is that it’s a Tommy Paine job. The local citizens would never have been able to get their hands on such a bomb, or been able to have made the arrangements for its delivery. They’re under too much surveillance.” Tog said thoughtfully, “but how did he escape all this surveillance?” “Don’t you understand? He’s working here, in this building, as an employee of UP. There is no other alternative.” They stared at him. “I think perhaps you’re right,” Tog said finally. Ronny turned to Mouley Hassan. “Can you get a list of all UP employees?” “Of course.” He flicked his order box, barked a command into it. Ronny said, “It’s going to be a matter of eliminating the impossible. For instance, what is the earliest known case of Tommy Paine’s activity?” Tog thought back. “So far as we know definitely, about twenty-two years ago.” “Fine,” Ronny said, increasingly excited. “That will eliminate all persons less than, say, forty years of age. We can assume he was at least twenty when he began.” Hassan said, “Can we eliminate all women employees?”