A thesis should speak for itself, and prefatory remarks should hardly be necessary. Three brief ones are, perhaps, called for with the present one. The Bibliography does nit stand at the forefront of the work by chance. Rather, because in it is revealed the pitiful inadequacy of the present writer's reading on the subject-matter, even in his native language (for which he can plead no excuse). Had the sections "Books of Reference", and "Articles", been thrice their actual length, and every work studies in detail from cover to cover (not skimmed through, as has all too often been the case), the results reached might have had some claim to significance. F. M. Cornford (The Unwritten Philosophy, pp. 33, 39) has remarked "Temperament is no con...