Davenport, Charles Benedict Letters to Pearson regarding <i>Mathematical Contributions to the Theory of Evolution VI</i>, and graduated variants; promotion of eugenics and statistical approaches to evolution in America; <i>Biometrika</i> editorial policy, and Davenport's resignation; their relative positions on evolutionary theory, including discussion of the differences between extreme normal variation and mutation, the direct action of environment, and inheritance of acquired characteristics; regarding the establishment of a laboratory at Cold Spring Harbour for the experimental study of evolution; and regarding Pearson's criticism of papers submitted to <i>Biometrika</i> by Davenport. 1899-1904