[69] This is described in detail by Lami, Borghini, and Hartwig.
[70] Villani, iii. 3.
[71] Ibid., iv. 1.
[72] Lami, "Lezioni," at preface to pts. cvi.-viii; Hartwig, i. 85, 86.
[73] Villani, iv. 6.
[74] Villani, iv. 7.
[75] It is related by St. Pier Damiano in the letter quoted farther on.
[76] Petri Damiani, "Epistolarum libri viii." Parisiis ex-officina nivelliana, 1610, vide p. 727. The epistle (p. 721 and fol.) is addressed: "Dilectis in Christo civibus florentinis, Petrus peccator, monachus, fraternae charitatis obsequium."
[77] Tocco, "L'Eresia nel Medio Evo," bk. i. chap. iii. pp. 207–228.
[78] Passerini, "Arch. Storico Italiano," New Series, vol. iii. pp. 43, 44; Perrens, i. 85 and fol.; Hartwig, i. 88, 89; Capecelatro, "Vita di S. Pier Damiano," bk. vii. two vols. Florence: Barbera, 1862.