Original sentence: A further very old claim states that distilling was known in Wales in the 6th century because the famous Welsh bard Taliesin mentions distilled mead in his 'Mead Song'.Finally, distilled alcoholic drinks are also said to feature in "The Mabinogion", a collection of Welsh sagas possibly dating from the 11th century, but containing elements that pre-date Christianity.It started life as far back as the 4th century, with a man known as Reaullt Hir distilling on Bardsey Island off the North Wales coast.Like the other Celtic nations, Wales has a long history of spirit distillation.The ingredients of this early spirit, known universally as “aqua-vitae” or gwirod in the Welsh language, was a mix of barley, yeast and honey distilled to make a basic raw spirit.This claim has been controverted; the name "Reaullt" is a High Mediaeval loanword from Norman-French; and "chwisgi" comes from  Gaelic uisce ("water [of life]"), itself a calque from Mediaeval Latin aqua vitae
Edited sentence: "The Mabinogion" refers to fermentation but not distillation; and the end of the "Mead Song" in a 16th century manuscript of the "Tales of Taliesin" mentions distillation (although mead is a fermented beverage).However the name "Reaullt" is a High Mediaeval loanword from Norman-French; and "chwisgi" comes from  Gaelic uisce ("water [of life]"), itself a calque from Mediaeval Latin aqua vitae.Like the other Celtic nations, Wales has a long history of alcohol creation; but distillation came in the Middle Ages