The Guerra Manuscript, named after its copyist José Miguel de Guerra y Villegas, is a repository of one hundred of the greatest secular songs (tonos humanos) circulating in the Madrid court of seventeenth-century Spain. The songs were composed by the leading figures of the Spanish Baroque and include many by the most prestigious of all, José Marín and Juan Hidalgo. Ideally accompanied by one of the principal Spanish baroque instruments, the arpa de dos órdenes (double harp), they explore ideas of love, praise, and beauty. This volume includes perhaps the best-known song of all, Corazón que en prisión.