Robert Louis Stevenson was a persistently sickly and convalescent individual who famously died young at age 44, but in his reading his letters one is struck by the fact that he simply could not stay in one place for long. He was constantly on the move at a time when travel was far more arduous than it is today. Some of that travel was to generate material for books, but a lot of it was intended for recuperation (spa towns, places with better weather, and so on).
It is hardly a deep insight to suggest that his chances of improving health would have been far better if he had just stayed somewhere, anywhere, instead of frenziedly pursuing well-being like a chimera. Yet this elementary point seems to have been ignored / resisted by both RLS and the people around him. Stevenson was obviously intelligent, a great writer, and heroic in his summoning of what little energy he had; but the need for novelty functioned in him self-destructively, like a substance abuse problem. One waits in the letters for a glimmer of realization: “Maybe I should just calm down.” It doesn’t come.