Annales Cambriae

The Annales Cambriae (Latin for Annals of Wales) is the title given to a complex of Latin chronicles compiled or derived from diverse sources at St David's in Dyfed, Wales. The earliest is a 12th-century presumed copy of a mid-10th-century original; later editions were compiled in the 13th century. Despite the name, the Annales Cambriae record not only events in Wales, but also events in Ireland, Cornwall, England, Scotland and sometimes further afield, though the focus of the events recorded especially in the later two-thirds of the text is Wales.

Source for the Arthurian legend
There are two entries in the Annales on King Arthur, one on Medraut (Mordred), and one on Merlin. These entries have been presented in the past as proof of the existence of Arthur and Merlin, although that view is no longer widely held because the Arthurian entries could have been added arbitrarily as late as 970, long after the development of the early Arthurian myth.

The entries on Arthur and Mordred in the A Text:


 * Year 72 (c. AD 516) The Battle of Badon, in which Arthur carried the cross of our Lord Jesus Christ on his shoulders for three days and three nights and the Britons were victors.
 * Year 93 (c. 537) The Strife of Camlann in which Arthur and Medraut (Mordred) fell and there was death in Britain and in Ireland.

Concerning Arthur's cross at the Battle of Badon, it is mirrored by a passage in Nennius where Arthur was said to have borne the image of the Virgin Mary "on his shoulders" during a battle at a castle called Guinnion. The words for "shoulder" and "shield" were, however, easily confused in Old Welsh – *scuit "shield" versus *scuid "shoulder" – and Geoffrey of Monmouth played upon this dual tradition, describing Arthur bearing "on his shoulders a shield" emblazoned with the Virgin.

Merlin (Old Welsh Myrddin) is not mentioned in the A Text, though there is mention of the battle of Arfderydd, associated with him in medieval Welsh literature:


 * Year 129 (c. 573) The Battle of Armterid

Texts B and C omit the second half of the year 93 entry. B calls Arfderydd "Erderit"; C, "Arderit". In the B Text, the year 129 entry continues: "between the sons of Elifer and Guendoleu son of Keidau in which battle Guendoleu fell and Merlin went mad". Both the B and C texts display the influence of Geoffrey of Monmouth's Historia Regum Britanniae, and this is reflected in the Arfderydd entry by the choice of the Latinized form Merlinus, first found in Geoffrey's Historia, as opposed to the expected Old Welsh form Merdin.