What sources did the author use? - secondary or primary sources?

The author used a large number of sources in his compilation of the book. Afew examples are as follows:

•Ancel, Rene. "La disgrace et le proces des Carafa, d'apres des documents inedits (1559-1567)," Revue Benedictine 24 (1907): 224-53, 479-509; 25 (1908): 194-224; 26 (1909): 52-80, 189-220,'301-24.