:Bersham Ironworks

The dates for the first furnace at Pentre Debenni in Bersham township, are unknown. The location has all the elements required nearby, charcoal, iron ore, limestone (for flux), water power to drive bellows, and natural cliffs as the furnace had to be charged from above and tapped at the bottom. The only shortcoming being the need to use land transport for products, there being no navigable river nearby. There is evidence that there was a furnace here in the 17th century. A 1934 newspaper article quotes an Esclusham parish report of the death of the wife of a charcoal burner in a cabin by the "ffurnesse" in 1699.{{cite news |author= |date=4 August 1934 |title=Gwaith Haearn Bersham (in Welsh) |pages=4–5 |work=Rhos Herald }} This same article suggests the right to smelt iron dates back to 1611–1612, but does not cite a source. According to local historian Alfred Neobard Palmer, it was originally known as the Pentre Works, but as its importance grew it took the name of the township rather than the village.{{cite news |author= |date=4 February 1893 |title=John Wilkinson and the Bersham Ironworks |page=6 |work=Wrexham Advertiser }}{{cite book |last=Palmer |first=Alfred Neobard |date=1899 |title=John Wilkinson and the Old Bersham Iron Works |url=https://viewer.library.wales/5742780#?xywh=-1649%2C0%2C5806%2C3677&cv=4 |access-date=11 May 2025}}

The furnace was rebuilt in 1717 by Charles Lloyd of Dolobran forge, and in 1721 it changed over from using charcoal to coke as fuel,{{cite book |last=Davis |first=Ron |date=1987 |title=John Wilkinson – Ironmaster Extraordinary |url=https://www.oldcopper.org/broseley/wilkinson/john_wilkinson_ironmaster_extraordinary.html |publisher=Dulston Press |isbn=0 9504999 5 1 }} an idea that Abraham Darby had made work in 1709 at Coalbrookdale and used for casting cooking pots. Use of coke in the production of iron for forging had been less successful as the sulphur from the coal tended to cause problems when hot working the iron (see hot-shortness). Abraham Darby died in 1717, and his son, Abraham, was only six at the time so this conversion to coke in 1721 wasn't directly due to Darby; however, Lloyd and Darby were both Quakers and reputed to be friends. Lloyd's business at Bersham went bankrupt in 1729, and the ironworks was then taken over by John Hawkins, who had married Darby's daughter Ann. In 1733 there was an investment of funds into Bersham from Coalbrookdale, evidence of the ties between the businesses. According to one source the lease of the Bersham Furnace was taken up in 1733 by Richard Ford and Thomas Goldney, who also had the lease of the Old Willey furnace at Broseley and converted it to coke fuelling at the same time. Goldney had a 50% share in Coalbrookdale and was key in ensuring the business continued following Darby's death in 1717.

In 1753, Isaac Wilkinson, John Wilkinson, and Edward Blakeway, as partners took over the lease of the ironworks. Isaac was keen to experiment and had just got a patent for making metallic rollers for processing grain and sugar cane.{{cite patent | country = UK | number= 675 | inventor = Isaac Wilkinson | title = Metallic Rollers for Grinding Grain and Sugar Canes | pubdate = 1753-01-24}} While at Bersham he patented several inventions, including a method for blowing a furnace using iron bellows powered by waterwheel or fire engine (now known as Newcomen engine),{{cite patent | country = UK | number= 713 | inventor = Isaac Wilkinson | title =Blowing Machine for Forges, Furnaces Etc | pubdate = 1757-03-12}} and an improved method for casting cannons, rollers. etc.{{cite patent | country = UK | number= 723 | inventor = Isaac Wilkinson | title = A new method or invention for casting of Guns or Cannon, Fire Engines Cylinders, Pipes, and Sugar Rolls, and other such like Instruments in dry sand in Iron Boxes made for that purpose; whereby the said Guns or Cannon, Fire Engines Cylinders etc., will be made and cast in a much more neat, complete, exact and useful, as well as cheap and expeditious manner than any method hitherto known and made use of | pubdate = 1758-04-21}} With the outbreak of the Seven Years' War in 1756 there was increasing demand for cannons. Although he had his own patented casting technique, like all other manufacturers of cannons the bore was formed using a casting core, and then after removal of the core, the bore had to be finish machined to be straight and correct size. Errors could lead to cannonballs becoming stuck in the barrel, leading to explosions. In spite of his inventions Isaac Wilkinson ran into financial problems in 1761, which according to John Aiken (writing in 1795) was in part due to "an expensive scheme to convey a blast by bellows from a considerable distance, to the works, by the means of tubes underground".{{cite news |author= |date=9 September 1882 |title=Extract from "Aiken's Mancher" published 4th June 1795 |page=6 |work=Wrexham Advertiser }}

Isaac's son John Wilkinson took over Bersham Ironworks in 1762, together with his brother, William. John had lost his first wife, Ann, following the birth of their first child, and in 1763 he married Mary Lee, the wealthy sister of Edward Blakeway's wife. This allowed him to enter a partnership to lease the old blast furnace at Willey, near Broseley in Shropshire. The furnace had been out of use for 3 years, but was restarted and a new furnace built – so John had plenty more than Bersham to occupy him. However it was at Bersham that in 1774 John devised a method to accurately make a smooth bore cannon, involving casting without a core and then drilling successively larger sizes until a boring tool could be used – the cannon being rotated rather than the tool. He patented this in 1774,{{cite patent | country = UK | number= 1063 | inventor = John Wilkinson | title = A New Method of Casting and Boring Iron Guns or Cannon | pubdate = 1774-01-27}} and in 1778 was actively threatening to prosecute anyone boring guns or cannon from solid.{{cite news |author= |date=3 August 1778 |title=Iron Guns or Cannon |page=3 |work=Aris's Birmingham Gazette }} In tests by the Board of Ordnance, his cannons were so superior that in 1779 they revoked his patent on the basis of the national need. Cannons produced using the Wilkinson technique were used in the American War of Independence and the Napoleonic wars. John Wilkinson also devised a method for boring large cylinders for steam engines (early steam engine cylinders were up to 100 inches in diameter). When James Watt built his first steam engine with separate condenser in 1770 he found that he needed a much more precise cylinder to piston fit than the Newcomen engines. For four years he was unable to find anyone capable of producing cylinders to the required dimensional tolerances, but in 1774 John Wilkinson demonstrated a method using a stationary cylinder casting and a rotating boring bar supported at both ends. This achieved the desired precision and as a result the way was now clear for the Watt engine to go into production. Boulton & Watt was formed in 1775, and John Wilkinson was given the exclusive contract to provide the cylinders. This arrangement continued for many years, though was later soured when it was discovered that Wilkinson had been marketing his own black market steam engines on the side.

The production of cannon and steam engine cylinders provided John Wilksinon with a handsome return which he invested in other iron works, as well as lead, copper and other interests. However Bersham remained a key iron works, and was described by John Aiken in 1795:

"Besides the smelting furnaces, there are now several air furnaces for re-melting the pig iron, and casting it into various articles; such as cylinders for fire engines, water-pipes, boilers, pots and pans of all sizes, box and flat irons, and cannon and ball of all dimensions. The cannon are now cast solid, and bored like a wooden pipe, according to a very capital modern improvement. The small stream here turns machinery for the boring of cannon, the grinding flat and box irons, &c. There are also forges for malleable iron, and wire works; and likewise a newly erected brass foundry."..."At a short distance lead ore is got in considerable quantities and is smelted upon the spot; and Messr Wilkinsons have a work for the casting of lead pipes of various sizes and drawing them out to any lengths."

"A number of waggons are constantly employed in carrying goods between Bersham Furnace and Chester, which being fourteen miles land carriage is attended with great expense. But this inconvenience will be attended by the Ellesmere Canal, which is to pass by these works, and a cut from it, called the Brymbo branch, will go to a new and large iron foundry now erecting by Mr John Wilkinson".

The extension of the Ellesmere Canal northwards from Trevor never took place.

John Wilkinson's partner, his younger brother William, had spent several years in France where, among other things, he set up an ironworks at Le Creusot Montcenis. When he returned in 1789, his relationship with his brother deteriorated and got even worse when John bought the Brymbo Hall Estate in 1792 with plans for a new ironworks next to the mines providing raw materials. This area had previously been unsuitable due to insufficient water power, but the advent of steam engines to drive the machinery and blowers meant the location had significant advantages over Bersham. William was not invited to participate in the creation of what later became Brymbo Steelworks. The split became a feud, with William advising Boulton & Watt that his brother had been selling steam cylinders without their knowledge, and encouraging John Wilkinson's customers to use the new Boulton & Watt Soho Foundry in Birmingham, which opened in 1795. As a result, the Bersham Ironworks was put up for auction in 1795:

"That old established Iron work called BERSHAM FURNACE. Comprising the Machinery and Utensils thereto belonging, together with the Revertion of the sundry leases of the Lands and Buildings; the whole being well calculated for carrying on the Foundry Business on an extensive scale".{{cite news |author= |date=26 November 1795 |title=Iron Works To be sold by Auction |page=4 |work=Gore's Liverpool General Advertiser }}

Bersham iron works continued in use well into the 19th century, but its best days were behind it. In 1801 it advertised steam engines made on the patent principle, and lead pipes manufactured under royal licence, these being advertised by Thomas Glover and Son of Leeds. In 1802 it made the news by casting a copper table weighing 20 tons (to be used for making plate glass), the copper being melted in five furnaces, each holding 4 tons. In 1805 the making of a 22-ton copper table was also reported, the surface being levelled by a large cast iron plane driven by a water wheel.

The works again came up for auction in June 1813, and listed foundries, furnaces, boring mills, rolling mills, forges, machinery for casting and drawing patent lead pipes, cannon foundry and machinery for boring and turning cannon, smith's shops, carpenters shops, pattern-makers shops, dwelling houses for workmen and agents..."in excellent repair". Two powerful falls of water, 70 acres of land in cultivation, excluding nearly 20 acres forming the sites of the works. The works was described as formerly in the occupation of Mr Wilkinson, and since then in the occupation of Mr Thomas Jones (the only son of William Jones of Llanerchrugog Hall). Notice of the sale began early in 1812.{{cite news |author= |date=27 January 1812 |title=To ironmasters, iron-founders, enginners, millwrights, &c |page=4 |work=Aris's Birmingham Gazette }} Thomas Jones also ran the Ponkey ironworks and colliery, which he put up for sale in 1812.{{cite news |author= |date=31 January 1812 |title=To Be Peremptorily Sold by Auction |page=1 |work=Shrewsbury Chronicle }} His new Llwyneinion ironworks were starting up about this time so he may have decided to focus his work and finances on the new business.

Conspicuous in these accounts is the absence of any mention of a steam engine or boiler house at Bersham, suggesting the works remained powered by the river even though it had been the place where the breakthrough had taken place which allowed Boulton & Watt steam engine production that revolutionised industry.

After the sale in 1813, the site was leased to a family who opened a paper mill on the site. This did not last long, 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 of the mill building has new red brick roof built on the old sandstone walls.

File:Bershamoctagonal.JPG

Between 1987 and 1991, extensive excavations were carried out on the site, and revealed all the foundations of the original buildings and the rear wall of the engine house. They also revealed a lime kiln, with lime on the walls. Another excavation showed it was a blast furnace, as pig iron was found around it. This opened debate to what it actually was, and the debate is taught in local schools.{{why|date=October 2015}}

Another find during the excavations was part of a wooden railway.{{cite journal |last1=Grenter |first1=S |date=1993 |title=A Wooden Waggonway Complex at Bersham Ironworks, Wrexham. |url=https://doi.org/10.1179/iar.1993.15.2.195 |journal=Industrial Archaeology Review |volume=15 |issue=2 |pages=195–207 |access-date=10 May 2025}} These wooden waggonways are known from other industrial sites (notably New Willey furnace and Coalbrookdale at about the same dates), but the earliest in Britain dates back to around 1600 (e.g. Wollaton Wagonway). 40 metres of track were recovered from the site including a set of points. The piece of track, carbonised, still rests at the museum inside the mill building. The railway extended beyond the works, as there is a record in the National Library of Wales (F4495) of Isaac Wilkinson and partners leasing land in 1758 "called the Garden, Cadwgan fechan, Cae'r Saison, Cae Mawr, Park, Werglodd y Llong and Llwyn onn for the purpose of constructing a railroad to carry coal to Bersham furnace", and (F1397) in 1759 another lease of land called "Cae Ravon, Erw Harry and Erw Vawr in the parish of Rhuabon for constructing a railroad." Isaac had taken a 40-year lease for all the coal and iron ore under Cae Glas in 1757, and in 1758 he took a 99-year lease on the coal and iron ore at Bryn'r Owen,North East Wales archive, ref D/E/2481, 10 January 1758 the 'railroads' may link to either, or both. However, it is also possible that the business ran into financial difficulties, and that the railroads were not completed.

Another issue on which reports seem to differ, is that when relationships between John and William broke down, it was reported that William sent a gang of men to destroy the ironworks, and that John responded by sending his own gang of men to continue the destruction. Why William would attack the works in which he had a partnership, rather than another of John's holding is unclear. The extent of the damage must have been limited as the Bersham works continued in use for many years. Perhaps there was a specific project within Bersham that John had planned to transfer to Brymbo, and that was targeted. Alternatively, maybe this was a way to expedite the break up of the partnership without legal expenses.

After the historical importance of Bersham was recognised, Wrexham Council put the site forward for preservation as the Bersham Heritage Centre. The nearby Bersham School was reopened as an extensive museum dedicated to local history and Bersham Ironworks, and holds the remaining smooth bore cutting piece from the machine. The Mill building was restored and opened as a secondary museum, and contains artefacts such as the wooden waggonway and several pieces from the excavations, with a guided tour of them all. Most recently, the building that made the cannon's smooth bores was given a new roof and internal scaffolding to reinforce the structure. Now the site is earmarked for more funding by the Welsh Government.{{when|date=October 2015}}

• [http://www.wrexham.gov.uk/english/heritage/bersham_ironworks.htm Wrexham Council Minisite]
• [http://www.wrexham.gov.uk/english/heritage/bersham_heritage.htm Wrexham Council - Bersham Heritage Centre]

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Category:Ironworks and steelworks in Wales

Category:Former buildings and structures in Wrexham County Borough

Category:Museums in Wrexham County Borough

Category:Industry museums in Wales