Having given some account of my personal experiences among an African tribe in its original state, i.e., in a state uninfluenced by European ideas and culture, I will make an attempt to give a rough sketch of the African form of thought and the difficulties of studying it, because the study of this thing is my chief motive for going to West Africa. Since 1893 I have been collecting information in its native state regarding Fetish, and I use the usual terms fetish and ju-ju because they have among us a certain fixed value—a conventional value, but a useful one. Neither “fetish” nor “ju-ju” are native words. Fetish comes from the word the old Portuguese explorers used to designate the objects they thought the natives worshipped, and in which they were wise enough to recognise a certain similarity to their own little images and relics of Saints, “Feitiço.” Ju-ju, on the other hand, is French, and comes from the word for a toy or doll, so it is not so applicable as the Portuguese name, for the native image is not a doll or toy, and has far more affinity to the image of a saint, inasmuch as it is not venerated for itself, or treasured because of its prettiness, but only because it is the residence, or the occasional haunt, of a spirit.