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of Sheepbridge Iron Works, Chesterfield
1854 Company established as Dunston and Barlow Co, Ltd.
1864 The company of the present name was established. 
1864 purchased Sheepbridge Ironworks, comprising blast furnaces, foundries and a forge.
1910 Built an engine in the Sheepbridge Workshops for their 20in mill. 
1914 Coal and iron company. 
1927 See Aberconway Chapter II for information on the company and its history. Owned collieries in Derbyshire and Nottinghamshire as well as large coal investments in South Yorkshire pits and ironstone mines in Northamptonshire and Rutland.
1948 The Sheepbridge Company split its assets, separating the engineering businesses from the businesses likely to be nationalised; the engineering businesses were sold to a new subsidiary Sheepbridge Engineering Ltd; the remaining businesses were ironstone mines, blast furnaces, rolling mills, wagon repair ship and sawmill