A weak state of health on the part of the percipient would seem to be conducive to hallucinatory visions. Here is a case in point contributed to the "Society for Psychical Research Proceedings," vol. x., by a Professor G----: "Saw an old woman with red cloak, nursing a child in her arms. She sat on a boulder. Place: a grassy moor or upland, near Shotts, in Lanarkshire. Date: over twenty years ago. Early autumn, in bright sunny weather. Made several attempts to reach her, but she always vanished before I could get up to the stone. Place far from any dwelling, and no spot where anyone could be concealed. "[I was] walking; had been slightly troubled with insomnia which afterwards became worse. Age about thirty. "No one [was with me]. I heard a vague report that a woman with red cloak was sometimes seen on the moor. Can't now remember whether I had heard of that report before I saw the figure--but think I had not. "Saw many years ago (age about twenty-one), a dog sitting beside me in my room: saw this only once: was troubled slightly with insomnia at the time which afterwards became worse." The percipient's own view, the collector tells us, is that the experience on the moor was entirely due to "nerves," as both then and previously when he saw the dog he had been much overworked, and in each case a severe illness followed. Not always does a visual hallucination take the form of a living human form. Occasionally the object seen or the sound heard is non-human in character. In insanity and in diseases such cases are frequently met with, the hallucination being often of a grotesque or horrible sort. Thus we have a case in which a young child beheld a vision of dwarfish gnomes dancing on the wall. Among the phantasms of inanimate objects in the collection of the late E. Gurney were a star, a firework bursting into stars, a firefly, a crown, landscape vignettes, a statue, the end of a draped coffin coming in through the door, and a bright oval surrounding the words "Wednesday, October 15, Death." Geometrical patterns, sometimes taking very complicated forms, comprise another known type of hallucination. As to a theory for hallucinations, the most acceptable one is that they have their origin in the brain, and that the senses are made to share in the deception. There is little doubt that William Blake's hallucinations were voluntary. Gurney refers to a friend, a painter, who was able to project a vision of his sitter out into space and paint from it. We have already seen that a hypnotic agent can cause his subject not merely to see things but to feel them, even to the extent of crying out with pain when an imaginary lighted match is applied to his finger. CHAPTER VI PHANTASMS OF THE DEAD