What may be called "spontaneous mediumship" is experienced by many persons not claiming mediumistic powers, and not understanding the nature of the phenomena manifesting to and through themselves. Such persons at times are conscious of the presence of spirit friends, and may even catch glimpses of them either in the form of a mental image impressed upon their minds by the spirit friends, or else by a more or less clear partial materialization. Sometimes raps manifest themselves in their vicinity, and tables and light articles of furniture may manifest movement at their touch or approach. Such persons, not understanding the laws of spirit manifestation, are frequently greatly distressed, or even frightened, by such manifestations; and in not a few cases they experience considerable annoyance and grief by reason of the attitude of their friends who are apt to consider them "queer," or "spooky," and therefore to be avoided. Moreover, in the case of the physical manifestations such as the movements of tables, furniture, etc., and the production of raps, these persons are frequently accused of deliberate fraud in the production of such phenomena, whereas as a matter of fact they, themselves, are quite in the dark as to the cause and nature of the phenomena in question. It is obvious that the placing of the right information in the hands of such persons, and their instruction in the laws and principles of mediumship would be a blessing to them. Mediumistic Flashes. A writer has the following to say concerning this class of mediumistic persons: "Those persons who are naturally sensitive sometimes experience strange and sudden impulses. Thoughts come to them 'in a flash,' so to speak. They say things spontaneously which they had not intended to say--the words seem to burst from them and 'say themselves.' Others have equally sudden and fugitive clairvoyant experiences; they see spirits where they least expect, and when they are absorbed in something else; but when they strongly desire to 'see' or to receive guidance, they get nothing. This state of affairs, in all probability, is due to the fact that their susceptibility is not sufficiently developed; their psychical impressibility can only be reached and acted upon under specially favorable conditions, which are disturbed and dissipated when the ordinary intellectual self is aroused. Systematic Development.