Dr. Edward B. Tylor, in his “Primitive Culture” (vol. i. p. 97), asserts that the Zulus have faith in the agency of kindly spirits as well, and says that, when one of these people sneezes, he is wont to exclaim: “I am now blessed; the ancestral spirit is with me. Let me hasten and praise it, for it is that which causes me to sneeze.” Thereupon he praises the spirits of the dead, and asks for various blessings. But among most uncivilized peoples sneezing is placed in the category of paroxysmal diseases, and reckoned to be of demoniac origin. Inasmuch as sneezing is often one symptom of an incipient cold, which is a physical ailment, and as among savage tribes every physical ailment is regarded as a case of demoniacal possession, the use of charms and exorcisms to counteract the efforts of the evil spirits seems a natural expedient.[373] When an American Indian falls sick, he believes his illness to be the work of some spiteful demon. Therefore, when he gets well, he changes his name, so that the demon may not be able to recognize him again.[374] The chief aim of the medicine-man, in treating a patient, is the expulsion of the evil spirit; and this is the prime object of the various superstitious ceremonies and incantations which are a prominent feature in medical practice among savages.[375] The medicine-man strives to drive away the demon by frightful sounds and gesticulations, and by hideous grimaces and contortions. Sometimes he makes a small image typifying the spirit of sickness, and this image is then maliciously broken in pieces.[376] The natives of West Africa believe that the mere mention of unpleasant names suffices to frighten away the demons who cause sickness; and these spirits may moreover be deceived by simply changing the name of a sick child. In the province of Tonquin, a French possession in southeastern Asia, hateful names given to ailing children are likewise thought to terrify the evil spirits; but when the little patients are convalescent, pleasanter names are substituted.[377] The Indians of Nootka Sound, Vancouver Island, attribute physical ailments either to the absence or irregular conduct of the soul, or to the agency of spirits, and medical practice is governed accordingly; therefore the Okanogons of the State of Washington subject patients affected with serious illnesses to the magical treatment of the medicine-man.[378] The islanders of the South Pacific have their own doctrine about the philosophy of sneezing. They believe that, when the spirit goes traveling about, its return naturally occasions some commotion, as is evident from the violent act of sneezing. They therefore deem it proper to welcome back the wandering spirit, the form of greeting varying in the different islands. The phrase employed by the natives of Raratonga, for example, means “Ha! you have come back!”[379]