I. Peregrini on Rhetoric. 1. Aristotle on Style. 2. Acutezza. 3. Ingenuity -- II. Vico's Institutions Oratoriae. 1. Vico on the Nature of Rhetoric. 2. Ingenuity. 3. Vico's Defence against Neo-classicism -- III. Vico's Theory of Knowledge. 1. Faculties of Cognition. 2. The Principle verum et factum convertuntur. 3. Vico's First Inaugural Oration of 1699. 4. Tesauro on Metaphor -- IV. Vico's Discussion of Descartes' Idea of Topics. 1. Descartes' Methodology. 2. Vico's Rejection of the Cartesians. 3. Vico Defines the Art of Topics -- App. A. Peregrini: On Acutezze -- App. B. Tesauro: The Aristotelian Telescope