Book excerpt: Nature and nurture; In the wilderness; Mathematical statistics; Rothamsted Experimental Station; Tests of significance; The design of experiments; The genetical theory of natural selection; The evolution of dominance; The role of a statistician; Galton Professor of Eugenics; Evolutionary ideas; In the United States and India; Blood groups in man; Losses of war; Arthur Balfour Professor of genetics; The biometrical movement; Scientific inference; Retirement.