When precautions like these are taken on behalf of the people in general against the malignant influence supposed to be exercised by strangers, we shall not be surprised to find that special measures are adopted to protect the king from the same insidious danger. In the middle ages the envoys who visited a Tartar Khan were obliged to pass between two fires before they were admitted to his presence, and the gifts they brought were also carried between the fires. The reason assigned for the custom was that the fire purged away any magic influence which the strangers might mean to exercise over the Khan.(524) When subject chiefs come with their retinues to visit Kalamba (the most powerful chief of the Bashilange in the Congo Basin) for the first time or after being rebellious, they have to bathe, men and women together, in two brooks on two successive days, passing the nights in the open air in the market-place. After the second bath they proceed, entirely naked, to the house of Kalamba, who makes a long white mark on the breast and forehead of each of them. Then they return to the market-place and dress, after which they undergo the pepper ordeal. Pepper is dropped into the eyes of each of them, and while this is being done the sufferer has to make a confession of all his sins, to answer all questions that may be put to him, and to take certain vows. This ends the ceremony, and the strangers are now free to take up their quarters in the town for as long as they choose to remain.(525) At Kilema, in Eastern Africa, when a stranger arrives, a medicine is made out of a certain plant or a tree fetched from a distance, mixed with the blood of a sheep or goat. With this mixture the stranger is besmeared or besprinkled before he is admitted to the presence of the king.(526) The King of Monomotapa (South-East Africa) might not wear any foreign stuffs for fear of their being poisoned.(527) The King of Kakongo (West Africa) might not possess or even touch European goods, except metals, arms, and articles made of wood and ivory. Persons wearing foreign stuffs were very careful to keep at a distance from his person, lest they should touch him.(528) The King of Loango might not look upon the house of a white man.(529)