Among the Monumbos in German New Guinea a man who has killed an enemy in combat becomes ‘unclean’, the same word being employed which is applied to women during menstruation or confinement. For a considerable period he is not allowed to leave the men’s club-house, while the inhabitants of his village gather about him and celebrate his victory with songs and dances. He must not touch any one, not even his wife and children; if he did so they would be afflicted with boils. He finally becomes clean through washing and other ceremonies. Among the Natchez in North America young warriors who had procured their first scalp were bound for six months to the observance of certain renunciations. They were not allowed to sleep with their wives or to eat meat, and received only fish and maize pudding as nourishment. When a Choctaw had killed and scalped an enemy he began a period of mourning for one month, during which he was not allowed to comb his hair. When his head itched he was not allowed to scratch it with his hand but used a small stick for this purpose. After a Pima Indian had killed an Apache he had to submit himself to severe ceremonies of purification and expiation. During a fasting period of sixteen days he was not allowed to touch meat or salt, to look at a fire or to speak to any one. He lived alone in the woods, where he was waited upon by an old woman who brought him a small allowance of food; he often bathed in the nearest river, and carried a lump of clay on his head as a sign of mourning. On the seventeenth day there took place a public ceremony through which he and his weapons were solemnly purified. As the Pima Indians took the manslayer taboo much more seriously than their enemies and, unlike them, did not postpone expiation and purification until the end of the expedition, their prowess in war suffered very much through their moral severity or what might be called their piety. In spite of their extraordinary bravery they proved to be unsatisfactory allies to the Americans in their wars against the Apaches. The detail and variations of these expiatory and purifying ceremonies after the killing of an enemy would be most interesting for purposes of a more searching study, but I need not enumerate any more of them here because they cannot furnish us with any new points of view. I might mention that the temporary or permanent isolation of the professional executioner, which was maintained up to our time, is a case in point. The position of the ‘free-holder’ in mediæval society really conveys a good idea of the ‘taboo’ of savages[52].