Giuseppe Baini: Memorie storico-critiche della vita e delle opere di G. Perluigi da Palestrina (Rome, 1828).

Dom Aug. Vernarecci: Ottaviano dei Petrucci (second ed. 1882).

LITERATURE FOR CHAPTER XI

In English

Grove's Dictionary of Music and Musicians: Art. Opera, Peri, Caccini, etc.

R. A. Streatfeild: The Opera (London, 1897).

W. F. Apthorp: The Opera Past and Present (New York, 1901).

In German

R. Eitner: Die Oper, etc. (Vol. X of Publikation älterer praktischer und theoretischer Musikwerke, Berlin, 1881).

A. Heuss: Die Instrumentalstücke des 'Orfeo' (1903).