Torry grew tense and nervous. He began to sense patterns of shivering, eery movement about him. Walls and ceilings closed in suddenly, and he could make out vague, monstrous forms set into niches within walls carved of bedrock. Old-Martian gods in sculptureāleering stone spectres, goblin-like, and subtly obscene. Tharol Sen paused. Her hand sought Torry's and drew him close, but not in friendliness. She whispered harshly, warning him to silence and extreme caution. "I was wrong. The police have broken through. Some are already in the vaults." She followed a maze of barely visible threadlike guidelines of luminosity set into the metallic tiling. A few steps more brought them to a wide platform, from which many tunnel mouths opened. Along one wall ranged banks of elevators. Beyond were ranks of empty pneumatic tube cars on tracks which angled in sharp descent into wells a level below the platform. Spidery Martian hieroglyphs labeled various shafts and the tube terminals. Tharol Sen studied the markings closely before making her choice. "I have been here only once before," she complained. "It is not easy to find the way. But I think the police will have more trouble." She selected a pneumatic tube car. Torry boosted her to the door flap. She settled herself in the tiny seat cradle, then from inside, extended him a helping hand. For the first time she noticed his blistered palms and raw fingers. He grunted painfully as she drew him up beside her. "I should have bandaged your hands," she mused. Torry snorted. "Can you drive this shuttle? It has more gadgets than a space ship." "One way to find out," murmured Tharol Sen icily, poking a slim finger at a keyboard of colored studs. Distant machinery whirred and whined. Flaps banged shut and the shuttle car shot forward and down at sickening speed. Tharol Sen laughed, and the sound was of ice chips trickling on metal foil. Air whipped angrily about the shell of thin metal. There was no gut wrenching nausea of acceleration, only sharp awareness of speed. Movement became a blur streaming past the transparent plastic cartop. It was like being part of a hollow missile fired from an air gun. As the car's original impetus diminished, speed dwindled. The car dipped and slowed, then ran into a stop valve, like a piston in a closed cylinder, and stopped on a dense cushion of compressed air.