[From the marriage rules of the Kariera in Western Australia it is obvious that] a man may marry the daughter of his own mother’s brother, or of his own father’s sister. . . . Indeed we may say that the proper person for a man to marry, if it be possible, is his own first cousin. In the genealogies collected by me I found that in nearly every case where such a marriage was possible it had taken place.²

²Radeliffe-Brownn/an/an/an/an/an/a, "Three Tribes of Western Australia," 155–156.