Wolden arose to speak. "My friends, a troubled question has entered my mind. As you know, I am a man of peace. My entire life has been spent in developing theories upon what I call this subject before me. I had thought it to be something that could be developed within three generations--if we were left at peace. But we were not left at peace. And I accepted your decision that we go forth into space and find Grim Hagen. But now I have learned new things. This discovery of the Moon Metal has advanced my work by fifty years. Gor here has advanced it farther. We are upon the brink of perfecting my life's work. Now, I ask that I be relieved of command. Look, you have my son Ato. A much better commander than I could ever be. Let me stay here with my work, I beg of you." So the votes were taken, following a century-old ritual. Wolden was relieved of command and Ato was given his place. Hours later Gunnar and Odin sat with Ato in his quarters, making some last-minute decisions. There was a knock at the door. Wolden entered, carrying a strange-looking slug-horn that glimmered like mother-of-pearl. "I want you to take this with you," he begged his son. "It is made of the Moon-Metal. I think I know its secret now. A vibration that defies a vacuum. I hope to perfect my work, but I may not. Here," he offered the tiny horn to his son. "Blow it if you need me. It is soundless, but it defies time and space just as my work does. I carry a ring to match it. I may not succeed. But blow it when you need me, son, and if I can I'll be there--" Tears were in the eyes of both when Ato took the slug-horn from his father. CHAPTER 8 At their request, eight couples and their children were brought from The Nebula to the cavern. For the crew of the first ship had been old men--and the cavern had never known a child's laughter. Then Ato led his group back to the moon's surface. As a little conveyor belt hoisted him through the tube into the central core of the ship, Jack Odin found himself worrying a bit about Nea. She had decided to go on with them. Due to her experimental interests, Jack had supposed that she would stay with Wolden. But there she was, still carrying that perplexing case of hers. Quiet and sad-eyed, a little smaller than Maya, her face a little sharper, she still looked so much like Maya that Odin couldn't get his thoughts away from her. * * * * * There was one last period of final check-outs. Then Ato gave the signal, standing lean and tall in the control room, with a tight belt about his narrow waist, and Wolden's slug-horn fastened securely to it. The Nebula leaped toward the star-studded skies.