The different nightmare sensations, acute and vivid as they are, can be analyzed to find parallelisms between them and the ghostly plots. For example, take the sensation, common in nightmares, of feeling yourself falling from immeasurable height. The same thrill of suspense is communicated by the climax in Lewis's and Mrs. Dacre's Gothic novels, where the devil takes guilty mortals to the mountain top and hurls them down, down. The horrible potentialities of shadows suggested frequently in dreams is illustrated by Mary Wilkins Freeman's story where the accusing spirit comes back as a haunting shadow on the wall, rather than as an ordinary ghost, tormenting the living brother till _his_ shadow also appears, a portent of his death.[70] The awful grip of causeless horror, of nameless fear which assails one so often in nightmares is represented in _The Red Room_,[71] where black Fear, the Power of Darkness, haunts the room rather than any personal spirit. It is disembodied horror itself. Wilkie Collins illustrates the presaging vision of approaching disaster in _The Dream Woman_. The nightmare horror of supernaturalism is nowhere better shown than in Maupassant's _La Horla_ where the sleeper wakes with a sense of leaden weight upon his breast, and knows that night after night some dreadful presence is shut in with him, invisible yet crushing the life out of him and driving him mad. [70] _The Shadows on the Wall._ [71] By H. G. Wells. The nightmare motifs are present to a remarkable degree in Bulwer-Lytton's _The Haunted and the Haunters, or the House and the Brain_. There we have the gigantism of the menacing Thing, the supernatural power given to inanimate objects, the ghostly chill, the darkness, and the intolerable oppression of a nameless evil thing beside one. Vampirism might easily be an outcome of dreams, since based on a physical sensation of pricking at the throat, combined with debility caused by weakness, which could be attributed to loss of blood from the ravages of vampires. F. Marion Crawford's story, _For the Blood Is the Life_, is more closely related to dreams than most of the type, though probably Bram Stoker's _Dracula_ is the most horrible.