There is apparently, however, no very stringent law to prevent the spirits of all kinds of animals--benevolent and otherwise--from occasionally returning and materialising to us.
I have already stated that it is quite possible to separate the superphysical from the physical body, and for the former to manifest itself either visually or auditorially, or both, at any distance from the latter. The accomplishment of this act--which is called projection--is entirely a question of concentration, but of a concentration so intense that it cannot be reached--at least, such is my experience--without absolute physical quiet and total absence of mental disturbance.
The separation of the two bodies may be done consciously or unconsciously, more often the latter, and not infrequently, too, during sleep. Indeed, many cases of nocturnal hauntings have been found to be due to the phantasms of living people, who have dreamed they were visiting certain localities, and whose superphysical bodies frequently have, in very truth, visited the places in question, and thereby occasioned the hauntings.
The following is one of the many stories I have heard that would serve as an example of this kind of haunting. A Mrs. Elmore, on the occasion of her first visit to Scotland, told me that the people with whom she was staying took her to see a picturesque house near Montrose. The caretaker, on opening the door to them, turned deadly pale, and screamed out, "God help us! If it isn't the ghost come to visit me in broad daylight!" When the woman had recovered a little from her fright, she explained to them that, for some months past, the house had been haunted by an apparition the exact image of Mrs. Elmore; it had exactly the same face and figure, but was wearing different clothes, which clothes, however, when the caretaker described them, Mrs. Elmore immediately identified with certain garments she had at home.
As they proceeded to explore the house, it began to dawn on Mrs. Elmore that the face of the old woman was strangely familiar, and, on ascending the main staircase, she at once recognised the landing and passages as those she had been continually dreaming about during the past year. Pointing to one of the closed doors, she exclaimed, "That is my favourite room with the pretty blue wall paper, the blue carpet and the quaint inlaid cabinet standing opposite the foot of the old oak bedstead."