Neville gave a little start. That was the item that had slowed him the most. Had Lunko improved his technique to the extent that he could even fool a wife? Was the Carstairs he was trailing really Carstairs, or an understudy? He had deceived both his old friend and his own wife for a time, but even they had admitted noting a subtle change. Who was this phoney Carstairs? Where was the real Carstairs? Or, Neville wondered, was his original theory of drugs or hypnotism correct? "Thank you, General," he said. "You have been a big help. I have to go over to Operations now and get the past and future itineraries of the showboat. In another hour, I may begin to know something about this case." "It's nothing," said O'Hara, promptly closing his eyes and folding his knotty fingers on his breast. "It's all in the day's work. Luck to you." Neville heard the click as the secret door lock was released and he knew the interview was terminated. He backed away, stepped through the door and out into the corridor. * * * * * Neville went straight to the great library where the I.P. records are kept. An attendant brought him the bulky folder on the old Lunko gang. Neville found it engrossing reading, and the day waned and night came before he had committed all its contents to memory. Billy Neville obtained a televise connection with Tellurian headquarters. "How are your shadows doing?" He had already learned the real identity of the man he had trailed from Pallas; he was an actor belonging to the original ring and went by the name of Hallam. "Our shadows are doing fine," replied the officer at the other end, "but your friend Hallam seems unhappy. He made two calls on a high officer of the Radiation Corporation and after the second one he came very angry and ruffled looking. He has also called on several other persons, known to us as extortioners, and at least two of those are on his trail with blood in their eye." "I know," chuckled Neville. "He sold 'em a bill of goods--rolls of blank paper. They think they've been double-crossed. And they have, only I'm the guy that did it. But say, we can't have him killed--not yet. Better round up all his contacts and put 'em away, incommunicado. I'm hopping a rocket right now and will be with you in a jiffy." It did not take the police long to make the little jump from Luna to Tellus, and a couple of hours later Neville was confronting Hallam in a special cell. In his hands he held a first-class ticket to Titan in the Saturn group, which had come out of Hallam's pocket, as well as a handbill of the showboat announcing an appearance there in the near future.