[Footnote 25: See the regency and reign of John Cantacuzenus, and the whole progress of the civil war, in his own history, (l. iii. c. 1 - 100, p. 348 - 700,) and in that of Nicephorus Gregoras, (l. xii. c. 1 - l. xv. c. 9, p. 353 - 492.)]