think I made a serious mistake," Borden said quietly, "when I didn't kill Sattell!" To find a spot four light years across in a galaxy a hundred thousand light years wide would be difficult enough with good maps. With no maps, they could spend the rest of their lives wandering hopelessly among the stars, of which not one in ten thousand had yet been named by men, landing on planets not one in a hundred thousand of which had known human footsteps. And they might search for months or years upon a planet where there was a human colony, and never discover its location. Borden clenched and unclenched his hands. Sattell had been foisted upon him as a crew-member while the Danaë was being fitted out for space. Borden was filled with a deadly cold fury in which regret for his own past forbearance was his principal emotion. "Since he's taken the log and charts," he told Ellen icily, "he means either to bargain with us or to destroy us. And if I know Sattell, it's six of one and half a dozen of the other!" It would be. Sattell now had the power of life and death over Borden and Ellen and Jerry. He would not trade that power for anything less. In fact, he would not dare yield it at all, because he was so sure he would be killed himself if he did. The only bargain he could conceivably make would be one in which they surrendered themselves to him absolutely, armed him and disarmed themselves, and threw themselves on Sattell's mercy. And Sattell had little mercy. "You might try calling Jerry again," said Borden. "Once we've warned him, we can try to track Sattell by his footprints. His shoes have heels, and the ground is soft." Ellen picked up the walkie-talkie microphone again. "Jerry, Sattell's disappeared. Come in, please.... Jerry, Sattell's disappeared. Come in, please...." Her voice went on and on. Borden went grimly over the ship, looking for signs of what else Sattell might have busied himself with in the past twenty-four hours. He had believed that Sattell, being in the same boat with the rest of them—in the same space-ship, anyhow—would automatically have thought of the group. No sane man did think of anything but cooperation with his companions in disaster. But there exists a kind of human being, he knew, which may be a mutant, which makes a career of the gratification of all emotions, impulses, momentary desires. Which knows no