“Forasmuch as it is ordained of God that all flesh hath spirit and thereby taketh on spiritual powers, so, also, the spirit hath powers of the flesh, even when it is gone out of the flesh and liveth as a thing apart, as many a violence performed by wraith and lemure sheweth. And there be who say that man is not single in this, but the beasts have the like evil inducement, and – ”

—MEDITATIONS (DENNEKER)

1

The screams, that fourteenth night, continued until dawn. They were totally unlike any sounds in my experience. Impossible to believe they could be uttered and sustained by a human, yet they did not seem to be animal. I listened, there in the gloom, my hands balled into fists, and knew, suddenly, that one of two things must be true. Either someone or something was making these ghastly sounds, and Brother Christophorus was lying, or–I was going mad. Hearing-voices mad, climbing-walls and frothing mad. I’d have to find the answer: that I knew. And by myself.
–Charles Beaumont (THE HOWLING MAN)

1

“And then she died. How? I do not know. I no longer know; but one evening she came home wet, for it was raining heavily, and the next day she coughed, and she coughed for about a week, and took to her bed. What happened I do not remember now, but doctors came, wrote and went away. Medicines were brought, and some women made her drink them. Her hands were hot, her forehead was burning, and her eyes bright and sad. When I spoke to her, she answered me, but I do not remember what we said. I have forgotten everything, everything, everything! She died, and I very well remember her slight, feeble sigh. The nurse said: ‘Ah! and I understood, I understood!’
–Henri René Albert Guy de Maupassant (Was It A Dream)

HIS voice came to us again. He said, at first, that he saw nothing in the abyss below him. Then he gasped, swayed, and almost lost his balance. We could see the sweat standing out on his brow and neck, soaking his blue shirt. There were things in the abyss, he said in hoarse tones, great shapes that were like blobs of utter blackness, yet which he knew to be alive. From the central masses of their beings he could see them shoot forth incredibly long, filamentine tentacles. They moved themselves forward and backward — horizontally, but could not move vertically, it seemed. They were, he thought, nothing but living shadows.
Robert A.W. Lowndes (THE ABYSS)