The approved way of marrying [among the Crow] was for the lover to present horses to the young woman’s brother. . . . If a man had bought the oldest of a number of sisters in this way he had the right of marrying the younger girls without making an additional payment. Sometimes a wife and husband would part on account of some disagreement, and in such a case a man generally married the next oldest sister. If the difficulty was smoothed over both women remained as his wives.2

2Lowie, R.H.n/an/an/an/a, "Social Life of the Crow Indians," Amer. Mus. Nat. Hist., Anth. Pap., 9: 222–223.