Martin smiled. "People don't grow old so quickly nowadays," he said. "You are 57 years old, Roger. Ann is 53." He leaned back in his chair, his gaunt smile fading. "The Dictator has not been without opposition. You, his parents, opposed him at the very start, and he cast you off. People wiser than the crowds were able to rebuff his powerful personal appeal, to see through the robe of glory he had wrapped around himself. He has opposition, but he has built himself an impregnable fortress, and dealt swift death to any persons suspected of treason. A few have escaped--scientists, technologists, sociologists, physicists. The work of one group of men gave us a weapon which we hoped to use to destroy the Dictator. We found a way to move back in Time. We could leave the normal time-stream and move to any area of past time. So four of us went back, searching for the core of the economic and social upheaval on Earth, and trying to destroy the Dictator before he was born. Given Time travel, it should have been possible. So we went back--myself, John Morrel, Ann Strang, and you." Roger shook his head, a horrible thought forming in his mind. "You were trying to kill David--my son--" he stopped short. "David _couldn't_ have been my son!" He whirled on Martin Drengo. "_Who was that boy?_" Martin looked away then, his face white. "The boy was your father," he said. * * * * * The drone of the jet bombers came again, whining into the still room. Roger Strang stood very still, staring at the gaunt man. Slowly the puzzle was beginning to fit together, and horror filtered into his mind. "My father--" he said. "Only twelve years old, but he was to be my father." He stared helplessly at the group in the room. "You were trying--to kill him!" Martin Drengo stood up, his lean face grave. "We were faced with a terrific problem. Once we returned to a time-area, we had no way of knowing to what extent we could effect people and events that had already happened. We had to go back, to fit in, somehow, in an area where we never had been, to _make_ things happen that had never happened before. We knew that if there was any way of doing it, we had to destroy Farrel Strang. But the patterns of history which had allowed him to rise had to be altered, too; destroying the man would not have been enough. So we tried to destroy him in the time-area where the leading time-patterns of _our_ time had been formed. We had to kill his grandfather." Roger shivered. "But if you had killed David--what would have happened _to me_?" "Presumably the same thing that would have happened to the Dictator. In theory, _if we had succeeded_ in killing your father, David, both you and the Dictator would have ceased to exist." Drengo took a deep breath. "The idea was yours, Roger. You knew the terrible damage your son was doing as Dictator. It was a last resort, and Ann and John and I pleaded with you to reconsider. But it was the obvious step."