“Think of your breakfast-table,” he said; “is your mental picture of it as clearly illuminated and as complete as your actual view of the scene?” Mr. Galton began by questioning friends in the scientific world, F.R.S.’s and other savants. “The earliest results of my inquiry amazed me. . . . The great majority of the men of science to whom I first applied, protested that mental imagery was unknown to them, and they looked on me as fanciful and fantastic in supposing that the words ‘mental imagery’ really expressed what I believed everybody supposed them to mean.” One gentleman wrote: “It is only by a figure of speech that I can describe my recollection of a scene as a ‘mental image’ which I can ‘see’ with ‘my mind’s eye’. I do not see it,” so he seems to have supposed that nobody else did.
When he made inquiries in general society, Mr. Galton found plenty of people who “saw” mental imagery with every degree of brilliance or dimness, from “quite comparable to the real object” to “I recollect the table, but do not see it”—my own position.
Mr. Galton was next “greatly struck by the frequency of the replies in which my correspondents” (sane and healthy) “described themselves as subject to ‘visions’”. These varied in degree, “some were so vivid as actually to deceive the judgment”. Finally, “a notable proportion of sane persons have had not only visions, but actual hallucinations of sight at one or more periods of their life. I have a considerable packet of instances contributed by my personal friends.” Thus one “distinguished authoress” saw “the principal character of one of her novels glide through the door straight up to her. It was about the size of a large doll.” Another heard unreal music, and opened the door to hear it better. Another was plagued by voices, which said “Pray,” and so forth.
Thus, on scientific evidence, sane and healthy people may, and “in a notable proportion do, experience hallucinations”. That is to say, they see persons, or hear them, or believe they are touched by them, or all their senses are equally affected at once, when no such persons are really present. This kind of thing is always going on, but “when popular opinion is of a matter-of-fact kind, the seers of visions keep quiet; they do not like to be thought fanciful or mad, and they hide their experiences, which only come to light through inquiries such as those that I have been making”.
We may now proceed to the waking hallucinations of sane and healthy people, which Mr. Galton declares to be so far from uncommon. Into the causes of these hallucinations which may actually deceive the judgment, Mr. Galton does not enter.
STORY OF THE DIPLOMATIST [{56a}]
For example, there is a living diplomatist who knows men and cities, and has, moreover, a fine sense of humour. “My Lord,” said a famous Russian statesman to him, “you have all the qualities of a diplomatist, but you cannot control your smile.” This gentleman, walking alone in a certain cloister at Cambridge, met a casual acquaintance, a well-known London clergyman, and was just about shaking hands with him, when the clergyman vanished. Nothing in particular happened to either of them; the clergyman was not in the seer’s mind at the moment.
This is a good example of a solitary hallucination in the experience of a very cool-headed observer. The causes of such experiences are still a mystery to science. Even people who believe in “mental telegraphy,” say when a distant person, at death or in any other crisis, impresses himself as present on the senses of a friend, cannot account for an experience like that of the diplomatist, an experience not very uncommon, and little noticed except when it happens to coincide with some remarkable event. [{56b}] Nor are such hallucinations of an origin easily detected, like those of delirium, insanity, intoxication, grief, anxiety, or remorse. We can only suppose that a past impression of the aspect of a friend is recalled by some association of ideas so vividly that (though we are not consciously thinking of him) we conceive the friend to be actually present in the body when he is absent.
These hallucinations are casual and unsought. But between these and the dreams of sleep there is a kind of waking hallucinations which some people can purposely evoke. Such are the visions of crystal gazing.
Among the superstitions of almost all ages and countries is the belief that “spirits” will show themselves, usually after magical ceremonies, to certain persons, commonly children, who stare into a crystal ball, a cup, a mirror, a blob of ink (in Egypt and India), a drop of blood (among the Maoris of New Zealand), a bowl of water (Red Indian), a pond (Roman and African), water in a glass bowl (in Fez), or almost any polished surface. The magical ceremonies, which have probably nothing to do with the matter, have succeeded in making this old and nearly universal belief seem a mere fantastic superstition. But occasionally a person not superstitious has recorded this experience. Thus George Sand in her Histoire de ma Vie mentions that, as a little girl, she used to see wonderful moving landscapes in the polished back of a screen. These were so vivid that she thought they must be visible to others.