The belief of the spectators that such scenes of disturbance arise from invisible beings will appear less surprising if we consider the common feats of jugglers, or professors of legerdemain, and recollect that it is only the frequent exhibition of such powers which reconciles us to them as matters of course, although they are wonders at which in our fathers' time men would have cried out either sorcery or miracles. The spectator also, who has been himself duped, makes no very respectable appearance when convicted of his error; and thence, if too candid to add to the evidence of supernatural agency, is yet unwilling to stand convicted by cross-examination, of having been imposed on, and unconsciously becomes disposed rather to colour more highly than the truth, than acquiesce in an explanation resting on his having been too hasty a believer. Very often, too, the detection depends upon the combination of certain circumstances, which, apprehended, necessarily explain the whole story.
For example, I once heard a sensible and intelligent friend in company express himself convinced of the truth of a wonderful story, told him by an intelligent and bold man, about an apparition. The scene lay in an ancient castle on the coast of Morven or the Isle of Mull, where the ghost-seer chanced to be resident. He was given to understand by the family, when betaking himself to rest, that the chamber in which he slept was occasionally disquieted by supernatural appearances. Being at that time no believer in such stories, he attended little to this hint, until the witching hour of night, when he was awakened from a dead sleep by the pressure of a human hand on his body. He looked up at the figure of a tall Highlander, in the antique and picturesque dress of his country, only that his brows were bound with a bloody bandage. Struck with sudden and extreme fear, he was willing to have sprung from bed, but the spectre stood before him in the bright moonlight, its one arm extended so as to master him if he attempted to rise; the other hand held up in a warning and grave posture, as menacing the Lowlander if he should attempt to quit his recumbent position. Thus he lay in mortal agony for more than an hour, after which it pleased the spectre of ancient days to leave him to more sound repose. So singular a story had on its side the usual number of votes from the company, till, upon cross-examination, it was explained that the principal person concerned was an exciseman. After which _eclaircissement_ the same explanation struck all present, viz., the Highlanders of the mansion had chosen to detain the exciseman by the apparition of an ancient heroic ghost, in order to disguise from his vigilance the removal of certain modern enough spirits, which his duty might have called upon him to seize. Here a single circumstance explained the whole ghost story.