There are then also works and areas of enquiry which stand outside this curriculum, and which Galen lists under separate headings. Such, in particular, are the works of ethics; Galen lists more than 25, of which only two (Aff. Pecc. Dig. and Ind.) survive in full, although PHP also contains much relevant material. (Some of the titles are tantalizing, in terms of what we have lost from Galen’s ethics: What Follows from Each Chosen Aim in Life; The Epicureans; Against Favorinus’ Attack on Socrates.)