ABSTRACT
It is difficult to determine the boundary beyond which the historian of literature need not, or may not, pass into the various fields of specialized and technical writing. The choice, which to some extent must be arbitrary, should be based in part upon a writer's greatness of stature but chiefly upon the qualities of style and breadth of popular appeal which entitle him to a place in the history of literature as well as of thought. When marginal cases are discarded, 1 there remain among English philosophers Mill and Spencer.
