Preface / Prologue. 'Nine years and more': an overview of the story / Introduction / Chapter 1. Aristotle's animal and the question of the soul / Chapter 2. Aristotle On the causes of the parts of animals / Chapter 3. Aristotle's animal in Padua: the anatomical investigations of Fabricius / Chapter 4. William Harvey: pupil, physician, Professor / Chapter 5. William Harvey, searcher into the vegetative soul / Chapter 6. ‘The wonderful circulation of the blood, first found out by me’ / Chapter 7. Method and experiment / Chapter 8. 'The anatomy of the blood': the blood as a new research object / Chapter 9. Precursing Aristotle: Why and how did we lose this Aristotle? / Chapter 10. Harvey and his historians: Why and how did we lose this Harvey? / Appendix: English or Latin? / Bibliography