A warning hum started somewhere down in the audoviso. Greg stared. Perspiration crawled down his face. This was it. This was the end of the nightmare. This had to be Pat Nichols. After seventy-two hours in which Greg had had to do without anesthesia! Seventy-two hours of reality! Seventy-two hours of consciousness ! Consciousness. Reality. Greg didn't know how he'd managed to remain sane. It seemed incredible that a man who had advanced to Stage Five in the Dream Continuity Scale, and who had be