From the Dark Ages the several kingdoms (some of them very small ones) which made up Wales each had their systems of law whose origins lay in some obscure tribal past. According to tradition, all those varying laws were brought together by Hywel ap Cadell, 'Hywel Dda' or Hywel the Good, who became king over nearly all Wales in 942. The body of law, known as the Law of Hywel Dda, which derives from those early origins, comes down to us in manuscript sources dating from the early 13th century. It was carefully preserved and perpetually adapted to changing circumstances by a skilled profession of lay jurists, and was in daily use virtually until the Tudor Union of Wales with England in 1536. In a composite text, Emeritus Professor Dafydd Jenkins presents a lucid and accurate translation that pays tribute to the original authorship, to the intrinsic literary quality of lawyers' prose. Concentrating mainly on the classical law of the thirteenth century found in the 'Iorwerth Redaction', the text is supported by an Introduction and Notes that will fascinate and instruct general reader and legal historian alike.