^Manuscript A of the Anglo-Saxon Chronicle gives the year as 655. Bede also gives the year as 655 and specifies a date, 15 November. R. L. Poole (Studies in Chronology and History, 1934) put forward the theory that Bede began his year in September, and consequently November 655 would actually fall in 654; Frank Stenton also dated events accordingly in his Anglo-Saxon England (1943).[2] Others have accepted Bede's given dates as meaning what they appear to mean, considering Bede's year to have begun on 25 December or 1 January.[3] The historian D. P. Kirby suggested the year 656 as a possibility, alongside 655, in case the dates given by Bede are off by one year.[4] The Annales Cambriae gives the year as 657.[5]