1–16 Cicero's proem: the fates of the characters in the dialogue.
17–18 Cotta's story: gathering to hear Crassus.
19–24 Crassus' discourse: the impossibility of separating style from subject matter.
25–36 Preliminaries to ornatus: the variety of eloquence.
37–51 The ‘necessary’ virtues of style: Latinity (purity) and clarity.
52–5 The other virtues of style: ornatus and appropriateness.
56–9 Oratory and philosophy: unity and ‘schism’.
60–8 The ‘schism’ and the history of philosophy.
69–73 Oratory without philosophy.
74–81 Philosophy and the ‘ideal orator’.
82–90 Philosophy and the actual orator.
91–5 Rhetorical teaching without philosophy: Latin rhetores.
96–103 A theory of ornatus.
104–8ornatus, amplification, and philosophy.
109–19 A method of philosophical inquiry: hypothesis and thesis.
120–5 Philosophy and ornatus.
126–31 Catulus on the Sophists.
132–43 The ‘schism’ and the earlier unity: Crassus' conclusion.
144–7 The reaction to Crassus' discourse.
148–54 The technicalities of ornatus: individual words.
155–65 Metaphor.
166–70 Devices related to metaphor.
171–2 Words in combination: juxtaposition.
173–81 Words in combination: rhythm and period.
182–6 Rhythm and period: theoretical considerations.
187–9 Catulus and Antonius react.
190–8 Prose rhythm: practical considerations.
199–209 Other aspects of ornatus: levels of style, ‘figures’ of speech and thought.