• 1814: He attended school at Machen then became an apprentice in Caerphilly.
• 1820: He moved to London to become a medicine student.
• 1821: He qualified as a surgeon. He practised at Nantgarw, Treforest, and Pontypridd, becoming very well known as a surgeon.
• 1837: He became a leading member of the Society of the Rocking Stone, a neo-druidic group, and performed rites at the Pontypridd rocking-stone.
• 1840: He fled to France to avoid punishment for supporting the Chartists but returned to Wales soon after to promote Neo-druidism and Independence for Wales.
• 1840: He claimed to be an arch-druid, wearing a white tunic, scarlet waistcoat and green trousers, and fox skin on his head.
• He held many controversial views, opposing marriage, orthodox religion, vaccination, and the law. He was a vegetarian, which was very unusual at the time.
• 1883: Gwenllian Llewelyn became his partner – she became the mother of three of his children: Iesu Grist, Iesu Grist the Second, and Penelopen.
• 1884: He was taken to court for cremating the body of his child, Iesu Grist Price, instead of burying it, which eventually led to the legalisation of cremation.
• 1893: 23 January – He died in Llantrisant and was cremated.