The wet-nurse was held in especial honour. The milk-relationship sometimes completely takes the place of blood-relationship. The Koran forbids the marriage of a nurse and a man whom, as a child, she has suckled; the laws of the Hanafi forbid a man to marry a woman from whose breast he has imbibed even a single drop of milk. Among the southern Slavonians: "If of two children who have fed at the breast of the same woman, one is a boy and the woman's own child, and the other (adopted) a girl, these two must never marry." If they are both girls, they are like real sisters in love and affection; if both boys, like real brothers. In Dardistan and Armenia also, milk-relationship prevents marriage (167. 263). In Mingrelia as soon as a child is given to a woman to nurse, she, her husband, children, and grandchildren are bound to it by ties more dear even than those of blood-relationship; she would yield up her life for the child, and the latter, when grown up, is reciprocally dutiful. It is a curious fact that even grown-up people can contract this sort of relationship. "Thus peasant-women are very anxious to have grown-up princesses become then foster-children--the latter simply bite gently the breasts of their foster-mothers, and forthwith a close relationship subsists between them." It is said also that girls obtain protectors in like manner by having youths bite at their breasts, which (lately) they cover with a veil (167. 263). Adoption by the letting or transfusion of blood is also found in various parts of the world and has far-reaching ramifications; as Trumbull, Robertson Smith, and Daniels have pointed out. The last calls attention to the Biblical declaration (Proverbs, xxviii. 24): "There is a friend which sticketh closer than a brother," underlying which seems to be this mystic tie of blood (214. 16). The mourning for the death of children is discussed in another part of this work. It may be mentioned here, however, that the death of a child often entails other, sometimes more serious, consequences. Among the Dyaks of Borneo, "when a father has lost his child, he kills the first man he meets as he goes out of his house; this is to him an act of duty" (100. 238). _Hereditary Bights._