_William of Malmesbury_
https://www.amazon.com/Gesta-Regum-Anglorum-Arthurian-Classics/dp/1699776989/ref=sr_1_fkmr1_1?crid=X61HD3NS19W0&dib=eyJ2IjoiMSJ9.VgkKobZoK1X0h3D1LROMioqFSjMsQ0ieFHG6FgFp4_U.X2U-2SLvOMGRxGdsKgKHVDO2KUsumGFdilqnlpjhHOM&dib_tag=se&keywords=gesta+regum+anglorun&qid=1740762732&sprefix=gesta+regum+anglorun%2Caps%2C137&sr=8-1-fkmr1

https://www.gutenberg.org/files/50778/50778-h/50778-h.htm
