 "Perlesvaus" survives in three manuscripts, two fragments, and two 16th-century printings.It was adapted into Middle Welsh as part of "Y Seint Greal", and one episode was rewritten in verse and included in the "Romance of Fouke Fitz Warin".The story's supposedly original author, Josephus, seems to refer to the Jewish-Roman historian Titus Flavius Josephus.