Both David Lewis and Phillip Evans, another local Catholic priest, regularly held mass in the chapel at Gunter Mansion. Following the King’s proclamation outlawing Catholic practice in 1678, both were arrested, tried and condemned to death.
David Lewis became the last Catholic martyr in Wales when he suffered the gruesome death of being hanged, drawn and quartered on 27 August 1679. A plaque in Usk marks the place of his execution.