Barry's hand groped against the wall beside the door. There was a click, and a yellow radiance sprang from the ceiling. "Even the batteries are still good," he muttered. "What is this?" Deisanocta cried with a shudder. * * * * * The room was a maze of instruments, levers, panels about the sides. But it wasn't this that had shocked the Princess, it was the bodies. Two sprawled on the floor, one on its back still held a weapon in one hand. That weapon pointed to the third body. Slumped in a chair before an instrument panel, the third body had grown rigid, a look of amazement on the undecomposed face. In the right hand, the weapon that had undoubtedly killed the other two, was still poised. "You can almost see the smoke curling from the muzzle of that ancient automatic," said Barry grimly. "They fought it out--must have been after the one in the chair landed the ship--and everybody lost!" "It's--it's horrible," the girl murmured. "Why--" A sudden commotion, reaching their ears faintly from outside, cut off her question. There were shouts--cries of pain and rage. Running feet pounded up the ship's ramp, came down the passage toward them. Barry brought up the heat ray in his hand--lowered it as a Martian staggered into the room. He was burned across the face and body. His pale lips moved. Faint words came forth. Others were choked off as he slumped to the floor. His body sprawled beside the other two already there. "He says a god comes," Deisanocta explained wildly. "One they cannot harm. The rest of my followers in the room outside have fallen." Other footsteps sounded at the door. Barry's heat ray came up again. This time its beam sprang across the room, bathed the figure that came through the door with blazing heat. "No good, Williams," came a sneering voice, metallic through a space suit communicator. "Don't you know impervium when you see it?" "Yes, I know it," said Barry. His eyes had noted the thin, fragile-looking garment over the space suit that Craig Grey wore. Impervium, fabulous, incredibly expensive, proof against any heat ray. "There's about a dozen suits in the System, and you have to have one!" Craig Grey's little black eyes snapped with triumph. "A man who fights savages needs one, Williams," he mocked. His glance flickered to Deisanocta, lingered a a long minute. "I see now why you went over to the Martians." Barry took a step toward him, fingers itching. "You--" Grey brought up his heat ray. "Careful, Williams. You have little enough time to live as it is." Barry stopped, bafflement stamped on his face. A rash move would leave Deisanocta at the mercy of this man. Craig Grey laughed. "I figured you could solve the mystery about this place, that's why I told my guards to let you past. I knew you'd come here instead of trying to run to Earth--after I told them of your activities on Mars."