Not the least remarkable of the powers of the subjective mind is its apparently absolute memory; not only are those experiences of which we have _objective_ cognizance indelibly recorded, but innumerable occurrences in our environment, which pass unnoticed or of which we are even consciously unaware, seem to be registered by the subjective mind. Although it cannot be included in the term memory, implying conscious memory, we have good reason for believing that in common with all living organisms the subjective mind of men records not only the result of its own experience, but also is impregnated by those experiences of its ancestors which have been transformed into habits and have become innate, and that by this means only progress and evolution are capable of explanation. This unconscious register of ancestral experience, about which we shall have more to say in another chapter, is here adduced as being an additional factor which must have considerable bearing on the nature of _subjective_ impulses. The theories of unconscious and of "organic" memories[51] throw a great deal of light on the transmission of hereditary characters and of instincts. The very fact of the appearance of hereditary characteristics in, for example, young ducks hatched out by a hen, who persist in showing their ancestry by making for the first pond they see in spite of the astonished remonstrances of their foster-mother, points to race memory as the only solution. Telepathy is again another factor in connexion with the subjective mind which must be taken into account. It has been described as the normal means of communication between subjective minds _en rapport_; the possibilities of its influence cannot be ignored. Is it surprising, when we realize the range, scope and complexity of the subconscious intelligence within ourselves, that its emanations are sometimes mistaken for messages from another world?