Stephen's near St Austell. With a certain amount of financial assistance from Thomas Pitt (afterwards 1st Baron Camelford) he established the Plymouth China Factory at least as early as 1768. The factory was moved to Bristol about 1770, and the business was afterwards sold to Richard Champion and others and became the Bristol Porcelain Manufactory. Although the Plymouth porcelain was not of high quality, Cookworthy is remembered for his discovery of those abundant supplies of English clay and rocks which later formed the foundation of English porcelain and earthenware. Marriage In 1735, he married Sarah Berry, a Quaker from Wellington in Somerset. They had five daughters: Lydia – 1736 Sarah – 1738 Mary – 1740 Elizabeth & Susannah (twins) – 1743 Lighthouse engineering He was also an associate of John Smeaton, who lodged at his house when he was engaged in building the third Eddystone Lighthouse (1756–59). Cookworthy helped Smeaton with the development of hydraulic lime, which was essential to the successful building of the lighthouse. Swedenborg In 1767 Cookworthy, in conjunction with Rev Thomas Hartley, translated Emanuel Swedenborg's theological works, The Doctrine of Life, Treatise on Influx, and Heaven and Hell, from Latin into English. His initial reaction to Swedenborg's works was one of disgust, but with persistence, he was convinced of their merits and was a persuasive advocate. Hartley and Cookworthy later visited Swedenborg at his lodgings in Clerkenwell shortly before Swedenborg's death. Friends It is also known that prior to his departure, Captain James Cook, Captain John Jervis, and the naturalists Dr Solander and Sir Joseph Banks, were guests of Cookworthy. He also visited Daniel Gumb, the "Mountain Philosopher" who lived amongst the rocks at Cheesewring. References Bibliography Early New Church Worthies by the Rev Dr Jonathon Bayley Cookworthy's Plymouth and Bristol Porcelain by F.Severne Mackenna(1947) published by F.Lewis William Cookworthy 1705–1780: a study of the pioneer of true porcelain manufacture in England by John Penderill-Church, Truro, Bradford Barton (1972). English chemists People from Kingsbridge English Quakers 1705 births 1780 deaths Ceramics manufacturers of England English Swedenborgians English pharmacists Devonian pottery