By saying ‘tell me, Muse’, the Master Narrator is saying that the song that he will perform is something that he hears from a goddess who is invoked here as a singular Mousa ‘Muse’. See also I.01.001, where the Master Narrator likewise calls on a singular Muse. Although ennepein ‘narrate, tell’ here at O.01.001 does not explicitly refer to singing as does aeidein ‘sing’ at I.01.001, the narrative that the Master Narrator narrates is notionally a song in both the Iliad and the Odyssey. See in general the comment on O.01.001–010.