He was hanging on the grating. Hanging there, with white, twisted hands clutching the rigid bars of iron, straining to force them apart. His whole distorted body was forced against the barrier, like the form of a madman struggling to escape from his cage. His face--the image of it still haunts me whenever I see iron bars in the darkness of a passage--was the face of a man who has died from utter, stark horror. It was frozen in a silent shriek of agony, staring out at me with fiendish maliciousness. Lips twisted apart. White teeth gleaming in the light. Bloody eyes, with a horrible glare of colorless pigment. And--_dead_. I believe M. S. saw him at the very instant I recoiled. I felt a sudden grip on my arm; and then, as an exclamation came harshly from my companion's lips, I was pulled forward roughly. I found myself staring straight into the dead eyes of that fearful thing before me, found myself standing rigid, motionless, before the corpse that hung within reach of my arm. And then, through that overwhelming sense of the horrible, came the quiet voice of my comrade--the voice of a man who looks upon death as nothing more than an opportunity for research. "The fellow has been frightened to death, Dale. Frightened most horribly. Note the expression of his mouth, the evident struggle to force these bars apart and escape. Something has driven fear to his soul, killed him." * * * * * I remember the words vaguely. When M. S. had finished speaking, I did not reply. Not until he had stepped forward and bent over the distorted face of the thing before me, did I attempt to speak. When I did, my thoughts were a jargon. "What, in God's name," I cried, "could have brought such horror to a strong man? What--" "Loneliness, perhaps," suggested M. S. with a smile. "The fellow is evidently the watchman. He is alone, in a huge, deserted pit of darkness, for hours at a time. His light is merely a ghostly ray of illumination, hardly enough to do more than increase the darkness. I have heard of such cases before." He shrugged his shoulders. Even as he spoke, I sensed the evasion in his words. When I replied, he hardly heard my answer, for he had suddenly stepped forward, where he could look directly into those fear twisted eyes. "Dale," he said at length, turning slowly to face me, "you ask for an explanation of this horror? There _is_ an explanation. It is written with an almost fearful clearness on this fellow's mind. Yet if I tell you, you will return to your old skepticism--your damnable habit of disbelief!" I looked at him quietly. I had heard M. S. claim, at other times, that he could read the thoughts of a dead man by the mental image that lay on that man's brain. I had laughed at him. Evidently, in the present moment, he recalled those laughs. Nevertheless, he faced me seriously.