QUOTE : Perron had become interested in the effects of tropical environment on temper and character. At home Purvis might well have been, as he had intimated, the most mild-mannered and considerate of men. Of strong constitution himself, Perron- who had not maintained his heath in India without an almost valetudinarian attention to the medicinal needs of his body- had even so not been free of the shortness of temper that was one of the side-effects of an overworked and easily discouraged digestive system. The insight this had given him into the possibly important part played in Anglo-Indian history by an incipient, intermittent or chronic diarrhoea in the bowels of the RAJ was one of the few definite academic advantages he felt he had gained by coming to India.