Note 265 — Front matter (continued 4)

Historia de Vita Papæ Joannis XXIII., which must be cited with reserve, as the author had a bitter quarrel with John and is often inaccurate. See C. Hunger, Zur Geschichte Papst Johanns XXIII. (1876). More reliable are the references in the Commentarii rerum suo tempore in Italia gestarum (in Muratori, Rerum Italicarum scriptores, xix.), of Leonardo of Arezzo, at one time John's secretary. Leonardo's temperate verdict, that John was "a great man in temporal things, but a complete failure and unworthy in spiritual things," is endorsed by all. Exhaustive bibliographies will be found in E.J. Kitto's excellent works, In the Days of the Councils (1908), and Pope John the Twenty-third and Master John Hus of Bohemia (1910).