There is a light-heartedness about his letters like that of the old Eton times. Something might have been owing to the impulse of health, which was due to the tropical heat. Most probably this heat was what exhausted his constitution so early, but at first it was a delightful stimulus, and gave him exemption from all those discomforts with which cold had affected him at home. This exhilaration bore him over the many trials of close contact with uncivilised human nature so completely that his friends never even guessed at his natural fastidiousness. That which might have been selfish in this fastidiousness was conquered, though the refinement remained. Even to the last, in his most solitary hours, this personal neatness never relaxed, but the victory over disgust was a real triumph over self, which no doubt was an element of happiness.