"Planning a trip, were you?" the taunting voice went on. "I found quite a store of food here. The only trip you'll be making now is into the bottom dungeon of the Holes. By the gods, Lolan, you're a fool!" "Am I? It might as well be now as four days from now. You know I couldn't kill them." "I knew this: That if you couldn't, you weren't fit to be a Martian officer. Now I'll have to do the job myself. Because you're going to die tomorrow!" Silence piled up between them. Too soon the gaping slash on the planet's surface known as the Sulphur Holes was pivoting beneath them as they circled to a landing. Here, where subterranean forces had carved a series of natural dungeons and rock-bound gases still seeped through the holes in a stifling mist, the least fortunate of Arzt's prisoners were imprisoned. Burly guards came running up to take charge of Lolan. Arzt stood back with fists on hips. "Take him to the bottom level," his guttural command came. "Watch him closely. The devil's been conspiring with Venusians for a revolution!" He watched coldly while they jostled his former chief officer into the little rock house that housed the elevator. He stood there stolidly until a deep-pitched sigh emanated from the structure, denoting that one more soul had been carried down ... to hell. A fierce grin twisted his lax features. He was so engrossed in his own thoughts that he did not hear the closing of the storage-hatch on the pursuit ship they had come in, nor did he see the spidery form that slid from it to the shelter of some rocks. Deeply and sadistically satisfied, Commander Arzt turned and departed. For the first ten minutes after his captors had left him, Lolan sat on the edge of a hard, filthy cot with his head buried in his hands. The cell was low-ceilinged, with eroded sandstone walls studded with sharp metal crystals. Through the barred door drifted stringy tendrils of gas--sulphur smoke, belching up from the planet's bowels. From nearby cells came horrible moans, a ragged scream, the rattling of a door as some hapless prisoner shook it and shouted for food. The soft plod-plod of someone pacing the floor like a caged beast reached the Martian's ears. Lolan's lungs seemed filled with acid. He coughed until tears streamed from his eyes. Finally he fell back in despair on the cot. But even in his desperate physical pain he was far more conscious of acute despair over the failure of his plans to save Mora and Atarkus. He felt that no torture could be worse than imagining what devilish end Arzt would find for them. The grating of a key in the lock brought Lolan to a sitting posture. Then he had sprung to the door as Captain Irak, spindly, grinning little imp that he was, flung the door open and dodged in. "Irak--what the devil are you doing here?" Lolan coughed. The other pressed something hard and cold into his hand--a gun. "No questions now!" he rapped. "Follow me and use this if you need it--which you will!"