Copy letter from Robert William Frederick Harrison, to Professor Andrew Russell Forsyth, Fellow of the Royal Society Another paper has been received from Professor Karl Pearson, number IX of his 'Mathematical Contributions to the Theory of Evolution'. Encloses the abstract [not enclosed], which Professor [Arthur William] Rucker has authorized him to print. Asks if the paper is to be treated as mathematical or biological, and in the former case to whom it is to be refereed. The paper is not as exclusively mathematical as some of the previous papers. 23 October 1900