A very singular and interesting illustration of such combinations as Dr. Hibbert has recorded of the spectral illusion with an actual disorder, and that of a dangerous kind, was frequently related in society by the late learned and accomplished Dr. Gregory of Edinburgh, and sometimes, I believe, quoted by him in his lectures. The narrative, to the author's best recollection, was as follows:--A patient of Dr. Gregory, a person, it is understood, of some rank, having requested the doctor's advice, made the following extraordinary statement of his complaint. "I am in the habit," he said, "of dining at five, and exactly as the hour of six arrives I am subjected to the following painful visitation. The door of the room, even when I have been weak enough to bolt it, which I have sometimes done, flies wide open; an old hag, like one of those who haunted the heath of Forres, enters with a frowning and incensed countenance, comes straight up to me with every demonstration of spite and indignation which could characterize her who haunted the merchant Abudah in the Oriental tale; she rushes upon me, says something, but so hastily that I cannot discover the purport, and then strikes me a severe blow with her staff. I fall from my chair in a swoon, which is of longer or shorter endurance. To the recurrence of this apparition I am daily subjected. And such is my new and singular complaint." The doctor immediately asked whether his patient had invited any one to sit with him when he expected such a visitation. He was answered in the negative. The nature of the complaint, he said, was so singular, it was so likely to be imputed to fancy, or even to mental derangement, that he had shrunk from communicating the circumstance to any one. "Then," said the doctor, "with your permission, I will dine with you to-day, _téte-à-téte_, and we will see if your malignant old woman will venture to join our company." The patient accepted the proposal with hope and gratitude, for he had expected ridicule rather than sympathy. They met at dinner, and Dr. Gregory, who suspected some nervous disorder, exerted his powers of conversation, well known to be of the most varied and brilliant character, to keep the attention of his host engaged, and prevent him from thinking on the approach of the fated hour, to which he was accustomed to look forward with so much terror. He succeeded in his purpose better than he had hoped. The hour of six came almost unnoticed, and it was hoped might pass away without any evil consequence; but it was scarce a moment struck when the owner of the house exclaimed, in an alarmed voice, "The hag comes again!" and dropped back in his chair in a swoon, in the way he had himself described. The physician caused him to be let blood, and satisfied himself that the periodical shocks of which his patient complained arose from a tendency to apoplexy.