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Wales to Brittany. As a student I had come across Pezron as a chronologist, one of the first to doubt the calculations based on the Old Testament, which seemed to show that the world was created in 4004 BC.

   Then in 1703 Pezron wrote a book on the importance of the ancient Celts, with vocabularies to show how similar Welsh and Breton were. This was translated into English in 1707, and marked a turning point in Welsh studies, giving us a fresh enthusiasm for our language and ancient history. In our recent visit to Hennebont in June 2017 Jacques Guilchet and I agreed that we should try to get Pezron a commemorative plaque, perhaps at the church of Notre-Dame-de-Paradis in Hennebont, where he was baptised.

Photographs of basilica of Notre-Dame-de-Paradis, Hennebont: Wikicaro (left), Édouard Hue (right)

A few years ago we were invited to a buffet supper at a manor house near Hennebont. I found myself sitting next to the retired archivist of the town, Jacques Guilchet. He asked me, as a historian, whether I had heard of the seventeenth-century scholar Yves Pezron, born in Hennebont, about whom he had written some articles. I replied that in 1966 I had written my first academic article on Yves Pezron. It had been for the transactions of the Honourable Society of Cymmrodorion, the Welsh society of which I now was President.

   We became instantly great friends. Jacques Guilchet had been working on Yves Pezron’s books on religious and scientific subjects, while I had stuck to his important work connecting

Wales–Brittany link revealed by historic Hennebont scholar

Article by Professor Prys Morgan, Honorary President of the Twinning Association of Mumbles, July 2017

Prys Morgan in conversation with Jacques Guilchet at the Hennebont town hall during the official visit from Mumbles, June 2017