m Innocent III, Epistolarum liber I et ref.
[n] J. L. von Mosheim, Institutes of Ecclesiastical History (translated from the Latin by James Murdock).
[o] Anselmo di Lucca, Defensio pro Gregorio VII.
Chapter IV. From Exile to Supremacy
[b] H. H. Milman, op. cit.
[c] J. L. von Mosheim, op. cit.
[d] J. C. L. Gieseler, op. cit.
[e] Muratori, Annali d’Italia (including Vespasiano’s “Life of Nicholas V”).
[f] L. von Ranke, op. cit.
[g] Richard Garnett, on “Rome and the Temporal Power,” in Cambridge Modern History.