Abstract
The death of Socrates gave birth to an industry of biographical literature which often took the form of a defence or prosecution, sometimes purporting to be the actual defence or prosecution conducted at his trial. Plato and Xenophon wrote works in his defence. Among his critics, one Polycrates had a certain notoriety. Lysias, Theodectes and Demetrius of Phalerum, orators and rhetoricians like Polycrates, were credited with further works of apology. There were doubtless many others. The aim of this paper is to show that Xenophon wrote his Defence in the light of the rhetorical theory that required that a speaker utter words and thoughts appropriate πρεποντα to his character.