| Other Names
|| Leabhar Buidhe Lecain
| Date Written
|| 1391 with minor additions in 1401
| Place Written
|| Ádhamh Ó Cuirnín
||344 columns of text, first 289 were written by 1391; the remainder were written by 1401. Written in Middle Irish
||An important surviving manuscript containing nearly the whole of the Ulster Cycle, including a partial version of the Táin Bó Cúailnge - a compilation of two or more earlier versions. The manuscript also contains the oldest surviving version of Fergus mac Róich's death tale, has a later version of The Voyage of Máel Dúin, a collection of Irish triads, and the same ogham tract as is recorded in the Book of Ballymote. There is also a short story of the life of St. Patrick as told by Fintan.
||Produced for commercial consideration by Ádhamh Ó Cuirnín and his scribes using a standard formula based around the Book of Leinster and additional texts they created. Wholly unreliable as evidence clearly shows genealogies were created purely for the benefit of the client family.