is not much time. The burst of air carries you forward. Perhaps you scream, but you are now beyond sound, beyond sight, beyond everything. You do not even feel that it is cold. CHAPTER I There is a time for sleep, and a time for waking. But Hyrst had slept heavily, and the waking was hard. He had slept long, and the waking was slow. Fifty years, said the dim voice of remembrance. But another part of his mind said, No, it is only tomorrow morning. Another part of his mind. That was strange. There seemed to be more parts to his mind than he remembered having had before, but they were all confused and hidden behind a veil of mist. Perhaps they were not really there at all. Perhaps— Fifty years. I have been dead, he thought, and now I live again. Half a century. Strange. Hyrst lay on a narrow bed, in a place of subdued light and antiseptic-smelling air. There was no one else in the room. There was no sound. Fifty years, he thought. What is it like now, the house where I lived once, the country, the planet? Where are my children, where are my friends, my enemies, the people I loved, the people I hated? Where is Elena? Where is my wife? A whisper out of nowhere, sad, remote. Your wife is dead and your children are old. Forget them. Forget the friends and the enemies. But I can't forget! cried Hyrst silently in the spaces of his own mind. It was only yesterday— Fifty years, said the whisper. And you must forget. MacDonald, said Hyrst suddenly. I didn't kill him. I was innocent. I can't forget that. Careful, said the whisper. Watch out. I didn't kill MacDonald. Somebody did. Somebody let me pay for it. Who? Was it Landers? Was it Saul? We four were together out there on Titan, when he died. Careful, Hyrst. They're coming. Listen to me. You think this is your own mind speaking, question-and-answer. But it isn't. Hyrst sprang upright on the narrow bed, his heart pounding, the sweat running cold on his skin. Who