v. 1. The earlier Presocratics and Pythagoreans -- v. 2. The Presocratic Tradition from Parmenides to Democritus -- v. 3. The fifth-Century Enlightenment -- v. 4. Plato, the Man and his Dialogues -- v. 5. The later Plato and the Academy -- v. 6. Aristotle, an Encounter.