Penrun doubted if there was any place that would be safe from the monstrous insects. At any rate old Halkon had hidden his treasure there, and that part of the map that Penrun had thought was a lake was apparently the main cavern, and the canals, side passages. Old Halkon believed that he had hidden his treasure well, but he could not foresee just how well. Two thirds of the map, showing the location of the entrance to the Caves, had been taken by the murderer of the Martian, Lozzo. The remaining third, which showed the location of the treasure inside the Caves, was in Penrun's possession. The murderer could find the Caves, but not the treasure inside; and Penrun could find the treasure inside, but not the Caves. Penrun folded up the crumpled bit of paper and placed it carefully in his shoe. Unless his guess was wrong, another attempt to get it would be made shortly. Undoubtedly the girl had by now reported her failure to the rest of the gang. * * * * * The inquest was brief. The white-sheeted body of the Martian lay on the table where he had been slain. The captain of the liner called Penrun as the chief witness. He told a straightforward story of a chance acquaintance with Lozzo who, he said, seemed to be afraid of something. He had declared, so Penrun testified, that he was being hounded for a map of some kind and he wanted Penrun to see it. Then the murder had been committed, the map was stolen, and the murderer had fled. That was all, Penrun concluded, he knew about the matter. Other passengers corroborated his story and he was dismissed. Throughout the inquest Penrun studied the crowd of passengers that jammed the buffet, hoping he might catch a glimpse of the slender, dark-eyed girl who had tried to rob him. She was nowhere to be seen. He thought of telling the captain about her, but decided not to. She might make another attempt to get the map, and thereby give him the opportunity of rounding up the whole gang, or at least of learning who they were. He told himself grimly that if he could lay hold of her again, she would not escape so easily. If Penrun didn't realize before that he was a marked man, it was impressed on him more forcefully three hours later on the lower deck when two men attacked him in the darkened passage near the stern. There was no time for pistols. A series of hurried fist-blows. He slugged his way free and fled to the safety of his stateroom. Once there he locked the door and sat down to consider his position. It was obvious now that he would be followed to the outposts of space, if necessary, in an attempt to get the map from him. * * * * * After half an hour's hard thinking he tossed away his fourth cigarette, loosened the pistol in his armpit holster, and slipped out of the room. He went to the captain.