"Yes?" Hawkes looked closely at Johnson.

"You've probably heard of our tourist attraction called Nature's Moebius Strip? As far as we know, no one has ever gone beyond a certain point—and returned. Suppose there's a time flaw at that point—and the bearded man has somehow learned about it. Suppose anyone completing the Moebius circle, and returning, finds—say, twenty years have elapsed, while to him only a few minutes have passed?"

"Go on." Hawkes leaned forward intently.

"He makes his first holdup," Johnson continued, "and goes around the Strip. When he comes out twenty years later they're no longer looking for him. He leaves Marlock, and during the next five years he goes through the money he stole. He returns and repeats the process. This time the money lasts only three years. Now he's back to try it again. Do you see how that would tie everything up in a neat little package?"

Hawkes smiled, as he relaxed and sat back. "A bit too neat," he said. "Also, you don't have an ounce of concrete evidence to back up your theory."

"That's right. I don't," Johnson agreed.

Outside the door a board creaked. Johnson glanced quickly across the room to where Hawkes sat with a pistol on his lap. Hawkes' eyebrows raised, but he made no sound.