IN this brief study of Stevenson I propose to follow a somewhat unusual course; or to sketch what may be considered a rather eccentric outline. It can only be justified in practice; and I have a healthy fear that my practice will not justify it. Nevertheless, I have not adopted it without considerable thought, and even doubt, about the best way of dealing with a real and practical problem. So before it collapses completely in practice, I will give myself the triumph and the joy of justifying it in principle.