 Theophrastus seems to have been well known in antiquity as a writer on music (frs. 715–721B FHS&amp;G), and there are Arabic sources that refer to a tradition of musical theory that was believed to be traceable to him (frs. 722–725 FHS&amp;G). But although his work on the subject was apparently respected, we know rather little of its content. Theophrastus’ writings on music—namely, On Music, On the Musicians and Harmonics—are lost, and it is only thanks to Porphyry that a single verbatim quotation from his treatise On Music is preserved (fr. 716 FHS&amp;G), in which we find some of Theophrastus’ views (see Barker 1985; Sicking 1998).