This brings me to the question of the antiquity of the belief in fairies and to the associated problem of the existence of strata or stages in fairy belief. The antiquity of the belief is revealed by the wide distribution of tales concerning fairies, while it is also indicated by the antipathy of the elves to iron and salt - ancient taboos both. Not only so, but many traits respecting fairies, especially shape-shifting and the belief in their semi-corporeal state, are eloquent of primitive notions. That the process of the fairy belief witnessed more than one stage of development in the course of successive ages appears more than probable. 'The fairies of one race,' remarks Wentz, 'are the people of the preceding race.' If this statement lacks a certain precision, one realizes the implication; that is, that the ghosts or gods of a preceding race may come to be regarded by their successors as fairies.
