然而,大多数专家认为这个故事是被来自孟莫斯郡的牛津大学威尔士籍学者杰弗里所著的《12世纪英国帝王史》推广开来的。
However , most experts agree that the story was popularised by the12th Century History of the Kings of Britain , written by the Oxford-based Welsh scholar Geoffrey of Monmouth .