"Among the riverside tribes, ... regular rules of etiquette concerning the disposal of their dead friends exist. If in two villages, say a quarter of a mile away from each other, any member of one community dies, the body is promptly placed in a canoe and taken to the other village, where it is handed over to supply a banquet for the chief and his friends. The compliment, of course, is returned when a member of the other village likewise fulfils the debt of nature."