(M15) Sick people have, indeed, a special reason for sacrificing to the spirits of the dead kings in the hope of recovery, inasmuch as one of the commonest causes of sickness, according to the Shilluk, is the entrance of one of these royal spirits into the body of the sufferer, whose first care, therefore, is to rid himself as quickly as possible of his august but unwelcome guest. Apparently, however, it is only the souls of the early kings who manifest themselves in this disagreeable fashion. Dr. Seligmann met with a woman, for example, who had been ill and who attributed her illness to the spirit of Dag, the second of the Shilluk kings, which had taken possession of her body. But a sacrifice of two sheep had induced the spirit to quit her, and she wore anklets of beads, with pieces of the ears of the sheep strung on them, which she thought would effectually guard her against the danger of being again possessed by the soul of the dead king. Nor is it only in sickness that the souls of dead kings are thought to take possession of the bodies of the living. Certain men and women, who bear the name of _ajuago_, are believed to be permanently possessed by the spirit of one or other of the early kings, and in virtue of this inspiration they profess to heal the sick and do a brisk trade in amulets. The first symptom of possession may take the form of illness or of a dream from which the sleeper awakes trembling and agitated. A long and complicated ceremony follows to abate the extreme force of the spiritual manifestations in the new medium, for were these to continue in their first intensity he would not dare to approach his women. But whichever of the dead kings may manifest himself to the living, whether in dreams or in the form of bodily possession, his spirit is deemed, at least by many of the Shilluk, to be identical with that of Nyakang; they do not clearly distinguish, if indeed they distinguish at all, between the divine spirit of the founder of the dynasty and its later manifestations in all his royal successors.