This article discusses the Menetou manuscript (Berkeley, University of California, Jean Gray Hargrove Music Library, MS 777), a source that transmits some 80 vocal and keyboard arrangements of Lully’s music, and provides a comprehensive listing of concordances. The Menetou manuscript not only underlines the importance of arrangements in seventeenth-century music but also reveals the harpsichord’s multifarious roles: it can play its own music, it can accompany, it can play orchestral music as well as vocal music. In all, the Menetou manuscript provides a clear window into the diversity of musical styles that were enjoyed at the court of Louis XIV.