"Of course," Murdock agreed ironically. "What importance are we, compared to saving your young brother's life?"
Kenniston spoke slowly, to Murdock and Gloria and the others. "It wasn't merely Ricky's life at stake that made me sacrifice you all. It was more than that. I tried to tell you before, but you wouldn't listen."
enniston went across the hut and brought back the square black medicine-case of his young physician-brother. He opened it, and out of the vials and instruments inside he took a square bottle of milky fluid.
"This is what I sacrificed everything to save," Kenniston said simply.
They all stared. "What is it?" Gloria asked, puzzled.
"It's Ricky's discovery," Kenniston said. "It's a preventative and cure for gravitation-paralysis."
Captain Walls, himself an old-time space-man, was first of the group to appreciate the significance of the statement. The captain gasped.
"A preventative for gravitation-paralysis? Kenniston, are you sure?"