not sound, but diseased, and they would not react to the appearance with emotions of horror and by taking to their heels, but treat it as though it were entirely in order, and begin a conversation with it⁠—this being, in fact, the reaction of a person suffering from a hallucination. To suppose that such hallucinations affected the person subject to them with the same horror as would be felt by a sound mind was a defect of the imagination to which normal persons were often prone.