of detection devices. I assure you, it is utterly impossible for a spacecraft to land or take off from New Delos without our knowledge.”
Ronny Bronston's eyes lit with excitement. “These security measures of yours. To what extent do you keep under observation all aliens on the planet?”
The priest's chuckle had a nasty quality. “You are quite ignorant of our institutions, evidently. Every person on New Delos, in every way of life, was under constant survey from the cradle to the grave. Aliens were highly discouraged. When they appeared on New Delos at all, they were restricted in their movements to this, our capital city.”
Ronny let air whistle from his lungs. “Then,” he said triumphantly, “if any alien had anything to do with this, he is still on the planet. Can you get me a list of all aliens?”
The other laughed again, still sourly. “But there are none. None except you employees of United Planets. I'm afraid you're on a wild-goose chase.”
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?”
Ronny said, “I'd think so. The few times he's been seen, all reports are of a man. And that case on the planet Mother where he put himself over as a Holy Man. He could hardly have been a woman in disguise in a Stone Age culture such as that.”
Hassan said, “And this Tommy Paine has been flitting around this part of the galaxy for years, so anyone who has been here steadily for a period of even a couple of years or so, can't be suspect.”
Mouley Hassan thrust his hand into a delivery drawer and brought forth a handful of punched cards, possibly fifty in all.
“Surely there's more people than that working in this building,” Ronny protested.
Mouley Hassan said, “No. I've eliminated already everyone who is a citizen of New Delos. Obviously, Tommy Paine is an alien. We have only forty-eight Earthlings and other United Planets citizens working here.”
He carried the cards to a small collator and worked for a moment on its controls, as Tog and Ronny watched him with mounting tension. “Let's see,” he muttered. “We eliminate all women, all those less than forty, all who haven't done a great deal of travel, those who have been here for several years.”
The end of it was that they eliminated everyone employed in the UP building.
The cards were stacked back on Mouley Hassan's desk again, and the three of them sat around and looked glumly at them.
Ronny said, “He's tinkered with the files. He counterfeited fake papers for himself, or something. Possibly he's pulled his own card and it isn't in this stack you have.”
Mouley Hassan said, “We'll double-check all those possibilities, but you're wrong. Possibly a few hundred years ago, but not today. Forgery and counterfeiting are things of the past. And, believe me, the Bureau of Investigation and especially Section G, may look on the slipshod side, but they aren't. We're not going to find anything wrong with those cards. Tommy Paine simply is not working for UP on New Delos.”
“Then,” Ronny said, “there's only one alternative. He's on this UP ship going to, what was the name of its destination?”
“Avalon,” Mouley Hassan said, his face thoughtful.
Tog said, “Do you have any ideas on the men aboard?”
Mouley Hassan said, “There were four crew men, and six of our agents.”
Tog said, “Unless one of them has faked papers, the six agents are eliminated. That leaves the crew members. Do you know anything about them?”
Hassan shook his head.
Ronny said, “Let's communicate with Avalon. Tell our representatives there to be sure that none of the occupants of that ship leaves Avalon until we get there.”
Mouley
