I make these suggestions tentatively, and for the purpose of directing the attention of those interested to a line of investigation which should not be ignored by students of the new psychology. It is cognate with the phenomenon of haunted houses, and may yet be found to be governed by the same laws. If it is true that a visible ghost is but an embodied thought of a dying man, may it not be true that any great emotion can leave its impress upon the locality in which it is experienced? It may not be visible to the objective senses, but it may have the power to impress the subjective minds of those who are brought within its environment, and to create in them the same emotions as those experienced by the former occupants of the premises. It seems to be another form of telepathy, cognate with the phantom of the dead, differing only in the strength and character of its manifestation. It may not be visible, for the reason that the thought cannot be pictured by a vision. It may be an abstract thought, idea, or emotion, which can be transmitted to others by impression only; or the emotion which created it may not have been strong enough to project a visible phantom. Telepathy, therefore, appears to be divisible into three generic classes, differing principally in the methods or means of percipience,--the processes of projection being the same in all. The first is a thought sent from one living person to another for the purpose of communicating information to that one individual. It is perceived by that person only,--usually by means of visions,--and it instantly fades away when its mission is accomplished. The second is a thought sent from a dying person to the world at large to communicate some fact of portentous import. It is sometimes made visible to the objective senses, and is always confined to one locality, which it haunts till its object is accomplished. The third partakes of the characteristics of the first and second. It is created by a living person, and is confined to one locality. It is not sent to any particular individual, but impresses whoever inhabits the house or room it haunts. It will be understood by the intelligent reader that these three classes are not separated by any distinct lines of demarcation, but that each possesses characteristics common to the others. In concluding this branch of the subject we have but one further remark to make concerning those hypothetical spirits which are popularly believed to be able to make themselves visible to mortal eyes. If it is true that the power exists in mankind to create phantoms, to project visions which may become visible to others, objectively or subjectively, we have the logical right to infer that all so-called spirits, such as elementals, elementaries, _et id genus omne_, are creations of the subjective minds of those who believe in their existence.