Mr. McLennan, who introduced the word ‘exogamy,’ defined it thus: ‘an exogamous marriage is a marriage between persons of different clans of kinship, not entered into fortuitously, but because of law declaring it to be incest for a man to marry a woman of his own clan.’[20] The same community cannot be ‘both exogamous and endogamous,’ as some suppose. Thus Lord Avebury writes, ‘some races which are endogamous as regards the tribe, are yet exogamous as regards the gens.’ But really ‘exogamy is the law prohibiting marriage between persons of the same blood or stock as incest--often under pain of death--and endogamy is the law prohibiting marriage except between persons of the same blood or stock.’[21] In Mr. McLennan’s sense I shall take the word ‘exogamy,’ while dealing with peoples apparently nearest the beginning. Later, when descent in the male line is established, the prohibition on marriage within the totem name comes to apply, sometimes, to marriage within the local district held by the men of the name. The old prohibition, we see, is to many within the recognised limit of the blood kinship, or stock, designated by the totem name. But, as tribes advance to kinship through males, and as, thereby, groups of one totem name come to possess one region of country, it often happens that exogamy prohibits marriage between persons dwelling in that region. Whereas Grouse was forbidden to marry Grouse; later, the Grouse living together, say in Corradale, the exogamous prohibition takes the shape ‘persons dwelling in Corradale must marry out of Corradale.’ The name marking the exogamous limit is now, in such cases, local, but the prohibition is derived from the older tabu on marriage between ‘persons of the same blood or stock’--all those in Corradale being conceived to share the same blood or stock. This origin of ‘local exogamy’ must be kept in mind, otherwise confusion will arise. There are a few cases, even in Australia, where even local exogamy has become obsolete, and marriage, as with ourselves, is prohibited between persons of near kindred simply.