Donovan left him, keeping the secret of his identity. When he returned to his home he looked in the mirror, and the face of a rose-cheeked 20-year-old youngster stared back at him. Fifty years of happy living in the 20th century! It would soon be necessary to return to the 25th century so that Blascomb could reverse the antibiotic catalytic process that had set him growing younger. It was impossible to stay in his present youthful state much longer. In a few years he would be a child.
With a sigh he walked to his desk, took out paper and pen, and began to draw the diagrams for the apparatus which would send him forward into the 25th century.
For three hours he worked confidently, and then the sweat began to drip from his forehead and his heart began to pound fearfully. “It is not possibl
