(M187) It would doubtless be a mistake to treat these marriages as a relic of savagery, as a survival of a tribal communism which knew no bar to the intercourse of the sexes. For such a theory would not explain why union with a sister was not only allowed, but preferred to all others. The true motive of that preference was most probably the wish of brothers to obtain for their own use the family property, which belonged of right to their sisters, and which otherwise they would have seen in the enjoyment of strangers, the husbands of their sisters. This is the system which in Ceylon is known as _beena_ marriage. Under it the daughter, not the son, is the heir. She stays at home, and her husband comes and lives with her in the house; but her brother goes away and dwells in his wife’s home, inheriting nothing from his parents.(539) Such a system could not fail in time to prove irksome. Men would be loth to quit the old home, resign the ancestral property to a stranger, and go out to seek their fortune empty-handed in the world. The remedy was obvious. A man had nothing to do but to marry his sister himself instead of handing her over to another. Having done so he stayed at home and enjoyed the family estate in virtue of his marriage with the heiress. This simple and perfectly effective expedient for keeping the property in the family most probably explains the custom of brother and sister marriage in Egypt.(540) (M188) Thus the union of Osiris with his sister Isis was not a freak of the story-teller’s fancy: it reflected a social custom which was itself based on practical considerations of the most solid kind. When we reflect that this practice of mother-kin as opposed to father-kin survived down to the latest times of antiquity, not in an obscure and barbarous tribe, but in a nation whose immemorial civilization was its glory and the wonder of the world, we may without being extravagant suppose that a similar practice formerly prevailed in Syria and Phrygia, and that it accounts for the superiority of the goddess over the god in the divine partnerships of Adonis and Astarte, of Attis and Cybele. But the ancient system both of society and of religion had undergone far more change in these countries than in Egypt, where to the last the main outlines of the old structure could be traced in the national institutions to which the Egyptians clung with a passionate, a fanatical devotion. Mother-kin, the divinity of kings and queens, a sense of the original connexion of the gods with nature—these things outlived the Persian, the Macedonian, the Roman conquest, and only perished under the more powerful solvent of Christianity. But the old order did not vanish at once with the official establishment of the new religion. In the age of Constantine the Greeks of Egypt still attributed the rise of the Nile to Serapis, the later form of Osiris, alleging that the inundation could not take place if the standard