Note 14 — INTRODUCTION

See Professor Davidson’s The Stoic Creed, p. 42, where it is pointed out that each of these may be subdivided so as to bring the number up to six—Physics and Theology, Ethics and Politics, Logic and Rhetoric. See also Seneca, Epist. lxxxix., where the division is discussed. For further information on the subject, the article on the Stoics in the Encyclopaedia Britannica and any of the histories of philosophy, e.g. Erdmann or Zeller, may be consulted.