The law manuscripts of medieval Wales not only explain the historically unique Welsh legal system, but they also stand as works of surprising literary merit. The Legal Triads of Medieval Wales is the first full-length study devoted to the exploration of the legal triads—educational and mnemonic sentences for almost every aspect of medieval Welsh law that collect things in groups of three.  A must for any reader interested in the workings of medieval law, this volume offers a fully edited and translated text of the triads, as well as their literary and legal context.