 He seems to have made use of the list of Arthur's twelve battles against the Saxons found in the 9th-century "Historia Brittonum", along with the battle of Camlann from the "Annales Cambriae" and the idea that Arthur was still alive.Arthur's status as the king of all Britain seems to be borrowed from pre-Galfridian tradition, being found in "Culhwch and Olwen", the Welsh Triads, and the saints' lives.Finally, Geoffrey borrowed many of the names for Arthur's possessions, close family, and companions from the pre-Galfridian Welsh tradition, including Kaius (Cei), Beduerus (Bedwyr), Guenhuuara (Gwenhwyfar), Uther (Uthyr) and perhaps also Caliburnus (Caledfwlch), the latter becoming Excalibur in subsequent Arthurian tales.