Bersham Ironworks were large ironworks at Bersham, near Wrexham, Wales. They are most famous for being the original working site of John Wilkinson. They were also the first site in the world to use a new way of boring holes in cannon and steam engine cylinders. History Ironworking began at Bersham around 1640, and evidence shows that the cannon for the Royalists in the English Civil War were made there. In the 18th century, Isaac Wilkinson bought the ironworks and ran it for a considerable number of years. The main product was cannon, although the process to make them in iron was difficult, and cannonballs often became stuck in the barrel, leading to explosions. When Isaac's son John Wilkinson took over, he employed a boring machine to accurately make a smooth bore cannon, which became so popular that cannons produced using this technique were used in the American War of Independence and the Napoleonic wars. As well as cannon, the smooth bore machine could make cylinders for Boulton & Watt steam engines, leading Wilkinson to enter into a partnership with Watt to make the cylinders. However, Watt discovered Wilkinson had been marketing his own black market steam engines on the side, and the partnership was therefore terminated. With Europe and the world returning to peace, the market for cannon was lost. The space to expand at Bersham had run out, and Wilkinson needed to move on. He bought a house and estate at nearby Brymbo and built a blast furnace there, at what would later become Brymbo Steelworks. John Wilkinson had fallen out with his brother William, who raised a small gang to destroy Bersham Ironworks. Upon hearing this, John Wilkinson also raised a gang and helped the destruction: he was only too happy to destroy the mill which was causing him a loss. Only three structures survived: the mill building; the building which housed the smooth bore machine; and a lime kiln. After this, the site was leased to a family who opened a paper mill on the site. This did not last a long time, however, and the site was left derelict. The site on the southern bank of the River Clywedog had been completely destroyed, while the original works were in a state of decay. The site passed into agricultural use, and the "Mill building" became a mill, complete with a water wheel, still intact today. Most