How do text and melody relate in western liturgical chant? Is the music simply an abstract vehicle for the text, or does it articulate textual structure and meaning? These questions are addressed here through a case study of the second-mode tracts, lengthy and complex solo chants for Lent, which were created in the papal choir of Rome before the mid-eighth century. These partially formulaic chants function as exegesis, with non-syntactical text...