Complex sentence: The conference held at Whitland circa 945, was an assembly in which Welsh law was codified and set down in writing for posterity, much of the work being done by the celebrated clerk, Blegywryd.
Split into simpler sentences: The conference held at Whitland circa 945, was an assembly in which Welsh law was codified and set down in writing for posterity. According to tradition, much of the work was done by the celebrated clerk, Blegywryd.