M. E. Deschaux relates that his grandfather "was awakened one evening at eleven P.M. by three very distinct raps on the door of his room. Astonished, he rose, lit the lamp, opened the door, but saw no one. Supposing that some trickster had been the cause of his disturbance, he returned to bed grumbling, but again three knocks were heard on the door. He got up quickly, intending that the culprit should pay dearly for his untimely joke, but in spite of careful search, both in the passage and on the staircase, he could not discover where this mysterious culprit had disappeared to. A third time, when he was again in bed, three raps were audible on the door. This time the grandfather had a presentiment that the sound was caused by the spirit of his mother, although nothing in the tidings he had previously received from his family incited him to this supposition. Five or six days after this manifestation a letter arrived from his own country announcing the death of his mother which had occurred precisely at the hour at which he had heard the knocks. At the moment of her death, his mother, who had a particular affection for him, had insisted that a dress which her 'boy in Paris' had some time before sent her as a present should be brought and placed on her bed." Here we seem to have a distinct motive for the visitation; but on the other hand observe how many cases we come across where the phenomena appears to be due solely to the wanton and mischievous impulses of the invisible agents. There is for example the case of a house in which spiritual manifestations, often of a disturbing character, were continually being produced, related by Mr Inkster Gilbertson in _The Occult Review_ on the authority of a West End physician who is called Dr Macdonald. The swish of a silk dress and the slamming of doors were among the least important of the phenomena from a psychical point of view, though the sound of someone coming through a skylight and dropping on to the landing was certainly calculated to terrify the ladies, who "came up from the drawing-room screaming and shouting, expecting to find some dreadful tragedy being enacted." These manifestations consisted entirely of sounds, but at the regular sittings which were held in the house a drawer was taken from its place in the bedroom and left on the hall stand, the loose wooden leaves which converted a billiard-table into a dining-table were slid off the end and deposited on the floor, and a screen was several times seen to fold itself up without being touched.