Even as he looked at it, the torch went out, shutting him into inky blackness. The only sound at first was the desperation of his own breath; then he heard little scurrying sounds around his feet, and screamed involuntarily as something sleek and four-footed jumped at his chest with snapping jaws.
Shuddering, he fought the thing off, his fingers closing on wiry fur as he caught and squeezed. The thing went limp, and suddenly melted in his hands. He heard it splash as it struck the damp ground at his feet.
What were they doing to his mind?
He screamed out in horror, and followed the echoes of his own scream as he ran down the stone corridor, blindly, slipping on the wet stone floor, falling on his knees into inches of brackish water, scraping back to his feet with an uncontrollable convulsion of fear and loathing, only to run more—
The corridor suddenly broke into two and he stopped short. He didn't know how far, or how long, he had run, but it suddenly occurred to him that he was still alive, still safe. Only his mind was under attack, only his mind was afraid, teetering on the edge of control. And this maze of dungeon tunnels—where could such a thing exist, so perfectly outfitted to horrify him, so neatly fitting into his own pattern of childhood fears and terrors; from where could such a very individual attack on his sanity have sprung? From nowhere except....
Except from his own mind!
For an instant, he saw a flicker of light, thought he grasped the edge of a concept previously obscure to him. He stared around him, at the mist swirling down the damp, dark corridor, and thought of the rat that had melted in his hand. Suddenly, his mind was afire, searching through his experience with the strange not-men he had learned to detect, trying to remember everything he had learned and deduced about them before they began their brutal persecution.
They were men, and they looked like men, but they were different. They had other properties of mind, other capabilities that men did not have.
They were not-men. They could exist, and co-exist, two people in one frame, one person known, realized by all who saw, the other one concealed except from those who learned how to look. They could use their minds; they could rationalize correctly; they could use their curious four-dimensional knowledge to bring them to answers no three-dimensional man could reach.
But they couldn't project into men's minds!