Woods, Heredity in Royalty, pp. 74-75. The Great Elector, a great-grandson of William the Silent, married his 1-1/2 cousin, a granddaughter of William and also a great-granddaughter of Admiral Coligny. Frederick I married his second cousin, daughter of the Duchess Sophia of Brunswick, and a descendant of William. Frederick William I married his first cousin, Dorothea, granddaughter of Sophia, and also a descendant of William the Silent. Unfortunately the Hohenzollern line was continued by a mediocre brother of Frederick II, but through his sister, Queen Ulrica, the line of genius lasted still another generation to Gustavus III of Sweden.

[43]

See Darwin, "Marriages between First Cousins in England and Their Effects," Journal of Statistical Society, June, 1875, p. 178.

[44]

Boudin, "Croisement des familles, de races et des espèces." In Memoires de la Société d' Anthropologie, vol. i, p. 518.

[45]

Op. cit., p. 181.