"I have been a busy worker with the brain all my life, and have enjoyed very unusual health. I am now fifty-three, and have not been confined to the house by illness since I was seventeen, except for a short time during the war, when suffering from the results of a wound. This favourable result I attribute to (1) a good constitution—and an elastic temperament; (2) simple tastes, disinclining me to stimulants and narcotics, such as tea, coffee, wine, spirits, and tobacco; (3) a love of athletic exercises; (4) a life-long habit of writing by daylight only; (5) the use of homoeopathic medicines in the early stages of slight ailments. I have never been a special devotee of health, I think, but have followed out my natural tastes; and have certainly enjoyed physical life very much. It may be well to add that, though, as I said, my constitution was good and my frame always large, I had yet an unusual number of children's diseases, and have often been told that my life was several times preserved, in infancy, against all expectation, by the unwearied care and devotion of my mother. This may encourage some anxious parents."

Nov. 11, 1877. Hygiene of the Brain, N.Y., 1878.