Questions of authorship are central to the late thirteenth-century motet repertoire represented by the seventh section or fascicle of the Montpellier Codex (Montpellier, Biblioth?que interuniversitaire, Section de m?decine, H. 196, hereafter Mo). Mo does not explicitly attribute any of its compositions, but theoretical sources name Petrus de Cruce as the composer of the two motets that open fascicle 7, and three later motets in this...