Welsh mabinogi `instruction for young poets' a collection of medieval Welsh myths and folk tales put together in the mid-19th century and drawn from two manuscripts: The White Book of Rhydderch 1300-25 and The Red Book of Hergest 1375-1425. The Mabinogion proper consists of four tales, three of which concern a hero named Pryderi. Other stories in the medieval source manuscripts touch on the legendary court of King Arthur.