Shilluk should be most careful not to let the king die what we should call a natural death of sickness or old age. It is characteristic of their attitude towards the death of the kings that they refrain from speaking of it as death: they do not say that a king has died but simply that he has “gone away” like his divine ancestors Nyakang and Dag, the two first kings of the dynasty, both of whom are reported not to have died but to have disappeared. The similar legends of the mysterious disappearance of early kings in other lands, for example at Rome and in Uganda,(59) may well point to a similar custom of putting them to death for the purpose of preserving their life. (M17) On the whole the theory and practice of the divine kings of the Shilluk correspond very nearly to the theory and practice of the priests of Nemi, the Kings of the Wood, if my view of the latter is correct.(60) In both we see a series of divine kings on whose life the fertility of men, of cattle, and of vegetation is believed to depend, and who are put to death, whether in single combat or otherwise, in order that their divine spirit may be transmitted to their successors in full vigour, uncontaminated by the weakness and decay of sickness or old age, because any such degeneration on the part of the king would, in the opinion of his worshippers, entail a corresponding degeneration on mankind, on cattle, and on the crops. Some points in this explanation of the custom of putting divine kings to death, particularly the method of transmitting their divine souls to their successors, will be dealt with more fully in the sequel. Meantime we pass to other examples of the general practice.