These remarks have perhaps been made before in one form or other, but as much popular interest is always awakened by the supernatural, or what is supposed to be supernatural, we may go a little farther, and inquire how it was that the ghost seen by Dr. Jessopp disappeared when he raised his arm. Would any ghost be afraid of the Doctor extending his hand? The fact no doubt occurred as related. The explanation is that the narrator had been much impressed by a certain picture, which a correspondent soon identified as a portrait of “Parsons, the Jesuit Father.” The description given is that of the priest who was described by the Doctor in one of his books. The association of ideas in the library of a Norfolk house connected with the Walpoles, with whom Parsons had been a leader, gave rise, during a period of “forty winks” at midnight, to the spectre. In the interesting letters written upon “Natural Magic” by Sir David Brewster, the subject of Spectral Illusions is treated at some length, and with undoubted authority. Sir David thought the subject worth discussing with reference to the illusions or spectres mentioned by Dr. Hibbert. Sir David Brewster gives his own experiences which occurred while he was staying at the house of a lady in the country. The illusions appear to have affected her ear as well as the eye. We shall see in the next chapter how intimately sound and light are connected, and how the eyes and ears are equally impressed, though in a different way, by the vibration of particles. The lady referred to was about to go upstairs to dress for dinner one afternoon, when she heard her husband’s voice calling to her by name. She opened the door, and nobody was outside; and when she returned for a moment to the fire she heard the voice again calling, “Come to me; come, come away,” in a somewhat impatient tone. She immediately went in search of her husband, but he did not come in till half an hour afterwards, and of course said he had not called, and told her where he had been at the time—some distance away. This happened on the 26th December, 1830, but a more alarming occurrence took place four days after.