There were marks in the dirt, the tracks of sandaled feet. "Thulon, the three who were with him, wore sandals!" Hargraves rasped. "They came back here. They opened these graves." "But what happened after that? Are you suggesting those primitive gray-beards resurrected Hal Sarkoff?" "I'm not suggesting anything because I don't know anything," Hargraves answered. "I am just remembering that Thulon and the three who were with him _looked human too_! I am also remembering that the sphere which attacked us seemingly was without a crew. Our beams blasted it wide open. It was seemingly filled with machinery. Nothing else. If there were any intelligent creatures in it, they were in no form that we recognize. Come on!" Hargraves started running toward the ship. The ship, badly damaged as it was, represented their sole hope of survival. Without it, they would be helpless. Hal Sarkoff was with the ship. Or the thing that was masquerading as Sarkoff. Thulon had looked human too. Possibly Sarkoff and his two dead comrades had been removed from their graves in order to make possible a perfect duplication of their bodies, the probing of cell structure, both body and brain. Perhaps the things that lurked here on this world could read memories from dead minds. That might be the explanation of Sarkoff's memory. The important fact was that Sarkoff's body was not in its grave. Where so much was unknown, this was one indisputable fact. The thing that was on the ship must be placed not only under heavy guard but in a cage from which escape was impossible. Then an examination could begin. There was evil on this world. The trees, the vegetation, the ground under his racing feet, was evil. In his calmer moments Jed Hargraves would have said that evil was another word for danger. He wasn't calm now. The panic he had been rigidly excluding from his mind had burst the dam he had built before it. He could feel danger in the air. It was in the dawn, in the light of the sky. It was everywhere. He and his companions were aliens on this world, and the planet was striking at them, striving to eliminate them, contriving to destroy them. He heard it before he saw it. Something was grunting in the air. Above the tops of the trees something was grunting. He needed seconds to recognize the sound. Then he recognized it. And jerked himself to a halt, his eyes wildly probing upward. He saw it. * * * * * The ship. The grunting roar had come from the Kruchek drivers fighting the gravity of the planet. The ship had taken off without them. Had Nielson gone mad? Had he seen danger approaching and jumped the ship into the sky to escape it? "Wait! Nielson! Pick us up!" The ship flew on. Gaining speed, it passed over their heads. They caught another glimpse of it as it passed over an opening in the branches of the trees. Then it was gone, the throb of the drivers dying quickly away.