High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Yellow Book of Lecan (Leabhar Buidhe Lecain), or TCD MS 1318 (olim H 2.16), is an medieval Irish manuscript written no later than the dawn of the 15th century. It is currently housed at Trinity College, Dublin and should not be confused with the Great Book of Lecan. The manuscript is written on vellum and contains 344 columns of text. The first 289 were written by 1391; the remainder were written by 1401. It is written in Middle Irish. The book contains nearly the whole of the Ulster Cycle, including a partial version of the Táin Bó Cúailnge which is a compilation of two or more earlier versions, indicated by the number of duplicated episodes and references to other versions in the text. This incomplete Táin Bó Cúailnge overlaps with the partial version given in the Book of the Dun Cow; the complete text known today was derived from the combination of these recensions. The version of Fergus mac Róich's death tale in the Yellow Book of Lecan is the oldest one that survives.