will be. To each of the works Thrasylus affixes a double title, the one taken from the name of the interlocutor, the other from the subject. This tetralogy, then, which is the first, begins with the Euthyphro or On Holiness, a tentative dialogue; the Apology of Socrates, an ethical dialogue, comes second; the third is Crito or On what is to be done, ethical; the fourth Phaedo or On the Soul, also ethical. The second tetralogy begins with Cratylus or On Correctness of Names, a logical dialogue, which is followed by Theaetetus or On Knonledge, tentative, the Sophist or On Being, a logical dialogue, the Statesman or On Monarchy, also logical. The third tetralogy includes, first, Parmenides or On Ideas, which is logical, next Philebus or On Pleasure, an ethical dialogue, the Banquet or On the Good, ethical, Phaedrus or On Love, also ethical. The fourth tetralogy starts with Alcibiades or On the Nature of Man, an obstetric dialogue ; this is followed by the second Alcibiades or On Prayer, also obstetric; then comes Hipparchus or The Lover of Gain, which is ethical, and The Rivals or On Philosophy, also ethical. The fifth tetralogy includes, first, Theages or On Philosophy, an obstetric dialogue, then Charmides or On Temperance, which is tentative, Laches or On Courage, obstetric, and Lysis or On Friendship, also obstetric. The sixth tetralogy starts with Euthydemus or The Eristic, a refutative dialogue, which is followed by Protagoras or Sophists, critical, Gorgias or On Rhetoric, refutative, and Meno or On Virtue, which is tentative. 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,