Nicephori Constantinopolitani Breviar. p. 26. The patriarch of Constantinople, with Theophanes (Chronograph. P.309 [vol. i. p. 566, sq., ed. Bonn ), have slightly mentioned this last attempt for the relief of Africa. Pagi (Critica, tom. iii. p. 129, 141) has nicely ascertained the chronology by a strict comparison of the Arabic and Byzantine historians, who often disagree both in time and fact. See likewise a note of Otter (p. 121).