Ambrosius Aurelianus
Part I contains a narrative of British history from the Roman conquest to Gildas' time; it includes references to Ambrosius Aurelianus and the Britons' victory against the Saxons at the Battle of Mons Badonicus. Part II is a condemnation of five kings for their various sins, including both obscure figures and relatively well-documented ones such as Maelgwn Gwynedd. Part III is a similar attack upon the British clergy of the age.