Besides the epistles of Gregory himself, which are methodized by Dupin, (Bibliotheque Eccles. tom. v. p. 103 - 126,) we have three lives of the pope; the two first written in the viiith and ixth centuries, (de Triplici Vita St. Greg. Preface to the ivth volume of the Benedictine edition,) by the deacons Paul (p. 1 - 18) and John, (p. 19 - 188,) and containing much original, though doubtful, evidence; the third, a long and labored compilation by the Benedictine editors, (p. 199 - 305.) The annals of Baronius are a copious but partial history. His papal prejudices are tempered by the good sense of Fleury, (Hist. Eccles. tom. viii.,) and his chronology has been rectified by the criticism of Pagi and Muratori.