The marriage customs and relationships between the young men and the girls are instructive; they vary in the different tribes, but have some points in common. The Pueblos are monogamists, and polygamy is not allowed amongst them. Bancroft records a very curious custom. The morals of the young people are carefully guarded by a kind of secret police, whose duty it is to report all irregularities; and in the event of such taking place the young man and the girl are compelled to marry.[60] Now, whatever opinion may be held of such interference with the love-making of the young people, it affords strong proof of the error which has hitherto connected the maternal system with unregulated sexual relationships. This is a fact I am again and again compelled to point out, risking the fear of wearying the reader. [60] Bancroft, _op. cit._, pp. 546, 547. Among some tribes freedom is permitted to the women before marriage. Heriot states that the natives who allow this justify the custom, and say “that a young woman is mistress of her own person, and a free agent.”[61] The tie of marriage is, however, observed more strictly than among many civilised monogamous races. And this is so, although divorce is always easy and by mutual consent; a couple being able to separate at once if they are dissatisfied with each other. Here are facts that may well cause us to think. As for the courtship, the usual custom is reversed; when a girl is disposed to marry she does not wait for a young man to propose to her, but selects one to her liking, and then consults her family as to his suitability as a husband. The suitor has to serve the bride’s family before he can be accepted, and in some cases the conditions are binding and exceedingly curious. [61] Heriot, _op. cit._, p. 340.