Draft publication : 'Poisoning of farm animals by the Marsh Ragwort (Senecio aquaticus Huds.) - isolation of a toxic alkaloid', with ETR Evans. Nature 164 (1949), 30-31. Papers for Ragwort Advisory Committee meeting, 4 March 1949. Includes copy of 'Regwort Control in Pembrokeshire', a report compiled for the National Agricultural Advisory Service following trials carried out in 1948. 1948-1949