The safest eras of Abulfeda (in Vit. c. i. p. 2,) of Alexander, or the Greeks, 882, of Bocht Naser, or Nabonassar, 1316, equally lead us to the year 569. The old Arabian calendar is too dark and uncertain to support the Benedictines (Art. de Verifer les Dates, p. 15), who, from the day of the month and week, deduce a new mode of calculation, and remove the birth of Mahomet to the year of Christ 570, the 10th of November. Yet this date would agree with the year 882 of the Greeks, which is assigned by Elmacin (Hist. Saracen. p. 5) and Abulpharagius(Dynast. p. 101, and Errata, Pocock's version). While we refine our chronology, it is possible that the illiterate prophet was ignorant of his own age.