“Watch the light,” said the doctor under his breath, and then I knew too that it was no fancy of my own that had turned the air darker, and the way he turned to examine the face of our host sent an electric thrill of wonder and expectancy shivering along every nerve in my body.

Yet it was no kind of terror that I experienced, but rather a sort of mental dizziness, and a sensation as of being suspended in some remote and dreadful altitude where things might happen, indeed were about to happen, that had never before happened within the ken of man. Horror may have formed an ingredient, but it was not chiefly horror, and in no sense ghostly horror.