All right, Stanton thought, he's looking for something. I'll let him have both barrels and see if I hit the target.
"I've thought about it," he admitted. He got up, went over to the coffee urn, and refilled his cup. "I've got a pet theory of my own. It's just a notion, really. I wouldn't dare reduce it to syllogistic form, because it might not hold much water, logically speaking. But the evidence seems conclusive enough to me."
He walked back to his seat. Colonel Mannheim was watching him, a look of interest on his face, but he said nothing.
"To me," Stanton said, "it seems incredible that the combined intelligence and organizational ability of the UN Government is incapable of finding anything out about one single alien, no matter how competent he may be. Somehow, somewhere, someone must have gotten a line on the Nipe. He must have a base for his operations, and someone should have found it by this time.
"I may be faster and stronger and more sensitive than any other living human being, but that doesn't mean I have superhuman powers, or that I'm a magician. And I'm quite certain that you, Colonel, don't credit me with such abilities. You don't believe that I can do in a short time what the combined forces of the Government couldn't do in ten. Certainly you wouldn't rely too heavily on it.
"And yet, apparently, you are.
"To me, that can only mean that you have another ace up your sleeve. You know we're going to get the Nipe fairly quickly. You either have a sure way of tracing him, or you already know where he is.
"Which is it?"
Colonel Mannheim sighed. "We know where he is," he said. "We have known for six years."