When the doctor and nurse had left, Luke lay for a long time with his thoughts. There was a man--Tom Fuller. Unafraid, as an agent of a special governmental committee investigating prison conditions he had volunteered to get the evidence on Vulcan's Workshop. And he had done it, even though it was almost certain that his own life was to be the price. He had dared the misery and hardship, dared X.C. and the horrible death it brought, that this hellhole of Vulcan might be exposed, that it might be wiped out of existence by government agreement. Vulcan's Workshop, where the gold dust of a certain political clique, brought torture and disease and extinction to hapless prisoners who might otherwise be remade into useful members of society by the use of scientific methods--all this was to be no more. Fuller had succeeded where many others had failed. And Fuller was not to die. Only one of his lungs had been affected by X.C. and this not too extensively to respond to treatment. Many months of careful attendance would be required, and many more months of convalescence. But Fuller, they were sure, would live, Luke gloated. From what he had heard, Luke gathered that there was to be no trouble about his own pardon. Oddly enough, this gave him no satisfaction. Something had happened to him--inside. For the first time he realised his debt to society and would have preferred that just sentence be carried out upon him. But not in that place, not in Vulcan's Workshop! Luke shuddered. * * * * * And lying there, he swore a mighty oath that the remainder of his life was to be devoted to entirely different pursuits. It was not too late to face about, not too late to learn. If Fuller would help him, he _would_ learn. He had acquired a healthy respect for the book-learning he formerly ridiculed, and he wanted some of it for himself--as much as he could get. His old creed was forgotten, and his bitterness vanished. "Luke!" At the scientist's husky whisper he turned his head. Fuller was gazing at him with wide, solemn eyes. "Thanks, Luke," the thin lips murmured. "Thanks yourself. Where'd we be right now if it wasn't for your radium?" There was silence as they regarded one another. "I need you, Luke," Fuller whispered then, "in my laboratory back home. I'll be laid up for a long time, you know, and there's much to be done. Your brawn and my brain--we'll both profit. What do you say to that, Fenton, will you do it?" Luke grinned. "Will I? Just watch me!" Then, with a queer lump choking him, Luke looked away. He could think of no words to suit the occasion; he couldn't think at all somehow. Blissfully, he fell asleep.