TS "Note on the Effect of Altering Mutation Rate upon the Incidence of Affective Psychosis" Typescript report "Note on the Effect of Altering Mutation Rate upon the Incidence of Affective Psychosis (manic depressive insanity including involutional depression, reactive depression, etc.)" by Penrose. Circulated to the Panel on Genetic Effects, paper references MRC. 55/988, and CNR. 55/89. 1955