 How does Pop feel about Sattell?
His name was Sattell and he had reason not to talk. The shack and the job he filled were located in the medieval notion of the physical appearance of hell. The Crack, of course, was that gaping rocky fault which stretches nine hundred miles, jaggedly, over the side of the Moon that Earth never sees. There is nothing like it on Earth, of course. When it was first found, scientists descended into it to examine the exposed rock-strata and learn the history of the Moon before its craters were made. Pop lived in it all alone, and in his spare time he worked industriously at recovering some missing portions of his life that Sattell had managed to take away from him. There were air-tight bulkheads for safety, and a hydroponic garden to keep the air fresh, and all sorts of things to make life possible for men under if not on the Moon. With such an aid, a man can get into a tiny, coffinlike cubbyhole, and feel solidity above and below and around him, and happily tell himself that it feels delicious. But Sattell couldn't comfort himself so easily. Sattell got the shakes when he thought of Pop, and Pop rather probably knew it. Pop had come back to consciousness in a hospital with a great wound in his head and no memory of anything that had happened before that moment. And Sattell turned gray and frantically denied that he'd ever seen Pop before. All of which happened back on Earth and a long time ago. It seemed to Pop that the sight of Sattell had brought back some vague and cloudy memories. And Sattell went into panic when he returned. The pilot killed all forward motion just above the field and came steadily and smoothly down to land between the silvery triangles that marked the landing place. At such times Pop hardly thought of Sattell. He'd started to follow Sattell knowing what had happened to his wife and children, but it was hearsay only. When Sattell fled to another continent, Pop followed because he had some distinct memories of his wife—and the way he'd felt about her—and some fugitive mental images of his children. When Sattell frenziedly tried to deny knowledge of the murder in Tangier, Pop had come to remember both his children and some of the happiness of his married life. Even when Sattell—whimpering—signed up for Lunar City, Pop tracked him. If so, Sattell had profited by less than two days' pay for wiping out everything that Pop possessed. In any case, he didn't really want Sattell to die.
 Pop thinks Sattell murdered his family, but he wants Sattell to live. Being near Sattell sparks lost memories.
 Pop thinks Sattell murdered his family, but he wants Sattell to live. Being near Sattell sparks lost memories.  Pop thinks Sattell murdered his family. Pop wants to torture Sattell.  Pop thinks Sattell murdered his family Now Sattell is going to destroy Lunar City, and steal the diamonds.  Sattell murdered Pop's family, Pop wants Sattell dead.