Malone took off his hat. He reached across the desk to shake hands with the telepathy expert, and Dr. O'Connor gave him a limp fragile paw. "Thanks for giving me a little time," Malone said. "I really appreciate it." He smiled across the desk. His feet were already beginning to hurt. "Not at all," Dr. O'Connor said, returning the smile with one of his own special quick-frozen brand. "I realize how important FBI work is to all of us, Mr. Malone. What can I do to help you?" Malone shifted his feet. "I'm afraid I wasn't very specific on the phone last night," he said. "It wasn't anything I wanted to discuss over a line that might have been tapped. You see, I'm on the telepathy case." Dr. O'Connor's eyes widened the merest trifle. "I see," he said. "Well, I'll certainly do everything I can to help you." "Fine," Malone said. "Let's get right down to business, then. The first thing I want to ask you about is this detector of yours. I understand it's too big to carry around--but how about making a smaller model?" "Smaller?" Dr. O'Connor permitted himself a ghostly chuckle. "I'm afraid that isn't possible, Mr. Malone. I would be happy to let you have a small model of the machine if we had one available--more than happy. I would like to see such a machine myself, as a matter of fact. Unfortunately, Mr. Malone--" "There just isn't one, right?" Malone said. "Correct," Dr. O'Connor said. "And there are a few other factors. In the first place, the person being analyzed has to be in a specially shielded room, such as is used in encephalographic analysis. Otherwise, the mental activity of the other persons around him would interfere with the analysis." He frowned a little. "I could wish that we knew a bit more about psionic machines. The trouble with the present device, frankly, is that it is partly psionic and partly electronic, and we can't be entirely sure where one part leaves off and the other begins. Very trying. Very trying indeed." "I'll bet it is," Malone said sympathetically, wishing he understood what Dr. O'Connor was talking about. The telepathy expert sighed. "However," he said, "we keep working at it." Then he looked at Malone expectantly. Malone shrugged. "Well, if I can't carry the thing around, I guess that's that," he said. "But here's the next question: do you happen to know the maximum range of a telepath? I mean: how far away can he get from another person and still read his mind?" Dr. O'Connor frowned again. "We don't have definite information on that, I'm afraid," he said. "Poor little Charlie was rather difficult to work with. He was mentally incapable of cooperating in any way, you see." "Little Charlie?" "Charles O'Neill was the name of the telepath we worked with," Dr. O'Connor explained.