Book 3
1.60
The seventh tetralogy contains, first, two dialogues entitled Hippias, the former On Beauty, the latter On Falsehood, both refutative; next Ion or On the Iliad, which is tentative, and Menexenus or The Funeral Oration, which is ethical. The eighth tetralogy starts with Clitophon or Introduction, which is ethical, and is followed by the Republic or On Justice, political, Timaeus or On Nature, a physical treatise, and Critias or Story of Atlantis, which is ethical. The ninth tetralogy starts with Minos or On Law, a political dialogue, which is followed by the Laws or On Legislation, also political, Epinomis or Nocturnal Council, or Philosopher, political, and lastly the Epistles, thirteen in number, which are ethical.
1.61
In these epistles his heading was Welfare, as that of Epicurus was A Good Life, and that of Cleon All Joy. They comprise: one to Aristodemus, two to Archytas, four to Dionysius, one to Hermias, Erastus and Coriscus, one each to Leodamas, Dion and Perdiccas, and two to Dion’s friends. This is the division adopted by Thrasylus and some others.
1.61
Some, including Aristophanes the grammarian, arrange the dialogues arbitrarily in trilogies.