"Outside was also a globe-scanner which duplicated the activities of the one attached to the projector. We could tell at any moment to which section of Earth the projector's diex field had been directed. That was one of the overlapping precautions. It sounded like a standard check run. There was a little more conversation between Lowry and Weldon than was normal when you were the assistant operator, but that could be expected. There were pauses while the projector was shut down and preparations for the next experiment were made. Normal again. Then, during one of the pauses, we got the signal that someone had just entered Weldon's private nonspace conduit over there from this end. That was _not_ normal, and the conduit was immediately sealed off at both exits. One more overlapping precaution, you see ... and that just happened to be the one that paid off!" Arlene frowned. "But what did...." "Well," Harding said, "there were still a number of questions to be answered, of course. They had to be answered fast and correctly or the game could be lost. Nobody expected the rogue to show up in person at the Cleaver Project. The whole security island could have been destroyed in an instant; we knew he was aware of that. But he'd obviously made a move of some kind--and we had to assume that the diex projector was now suspended in the conduit. * * * * * "But who, or what, was in there with it? The project guards had been withdrawn. There'd been only the three of you on the island. The rogue could have had access to all three at some time or other; and his compulsions--until we found a way to treat them--were good for a lifetime. Any of you might have carried that projector into the conduit to deliver it to him. Or all three might be involved, acting together. If that was the case, the conduit would have to be re-opened because the game had to continue. It was the rogue we wanted, not his tools.... "And there _was_ the other possibility. You and Dr. Ben are among the rather few human beings on Earth we could be sure were not the rogue, not one of his impersonations. If he'd been capable of building a diex projector, he wouldn't have had to steal one. Colonel Weldon had been with Special Activities for a long time. But he could be an impersonation. In other words, the rogue." Arlene felt her face go white. "He was!" she said. "Eh? How do you know?" "I didn't realize it, but ... no, go ahead. I'd rather tell you later." "What didn't you realize?" Harding persisted. Arlene said, "I experienced some of his feelings ... after he was inside the conduit. He knew he'd been trapped!" Her hands were shaking. "I thought they were my own ... that I...." Her voice began to falter. "Let it go," Harding said, watching her. "It can't have been pleasant." She shook her head. "I assure you it wasn't!"