"A mask, Eddie. A trick for kids, you'd say." His uncle laughed. "I spent the day making it up, to help me get around more easily. That's nothing. The important fact is that it is made of vitaplasm. Remember the bar of it that I once had? Crude stuff then. Better now. Alive in a way of its own. A synthetic and far tougher cousin to natural protoplasm. Far less susceptible to damage by heat and cold. Self-healing, like flesh. Sustained by food and oxygen. But capable of drawing its energy from sunlight or radioactivity, too. And in some of its forms less dependent on a fluid base such as water. No, it's not consistently the same substance, or combination. Like the flesh we know, vitaplasm is in constant change. Here and now it's just an amorphous mass, crudely molded. An unshaped building material. But, like star ships, it belongs to the future. Here it's undeveloped principle, another phase of our advancing science everywhere. You could call it the clay of the superman, Eddie. I want you to remember all this. Because I may be back from where I'm going to try to go. Or I might get in touch sometime. We might need each other's help." Young Ed Dukas listened with intense interest. Perhaps his deepest drive was toward the shadowy splendor of times yet to come. They seemed a part of his growing self. They must become real! And he must take part in their fulfillment. Grief or hardship could not stop him. Therein he and Mitchell Prell traveled the same road. "You didn't invent vitaplasm, Uncle Mitch," he stated. "No one could have--alone." His sullenly serious gaze lingered on the mask. It was warm to his touch. It even recoiled a little. Mitchell Prell shook his head and chortled. "No, Nipper. You know that research is now far too complex for that. I helped a little. Lots of men did. Maybe I've added something to what is known. I've got to give my data to specialists here before I leave." Eddie thought of a man he'd sometimes seen on television. No bigger than Uncle Mitch. And plain looking. But great. Dr. Schaeffer in his underground laboratory in the City. "You aren't going to try to reach a star, are you?" young Ed asked. Uncle Mitch shook his head. "No. I won't wander so far off." He laughed. "But in a way I'll be going farther, I suppose. Though don't imagine that I mean time or hyper-dimensional travel. It's something simpler. But it's to a place where no one can journey exactly as a human being. I can't tell you much more. Because I don't want other people to try to dig too much out of you. But I want to look at things from a new angle. And from very close up, you might say. Maybe I'm trying to hide from danger, Eddie. Some. But the bigger reason is that I want to go on learning and exploring. Maybe my being a small man means something, too."