Where Henry Bolckow provided the investment and business expertise, Vaughan contributed technical knowledge, in a long-lasting and successful partnership that transformed Middlesbrough from a small town to the centre of ironmaking in Britain.

Vaughan is best known for his discovery of ironstone in the Cleveland Hills, on an exploratory walk with his mining engineer, John Marley in June 1850.

[1] In 1846 they built blast furnaces at Witton Park, County Durham for smelting iron ore; the Stockton and Darlington Railway, seeking to exploit the coal and iron trade, was conveniently extended past Witton to several of the Durham collieries; limestone could arrive from Stanhope, and coke from Crook, so the site appeared ideal.

[1] But in 1847 there was "a commercial panic" (an economic crisis), and the Witton Park Ironworks suffered both from difficult trading conditions, and from a continual shortage of iron nodules.

Bolckow and Vaughan moved rapidly: within 12 weeks, they had signed agreements with the landowners, started the first mine, built a tramway to carry the ironstone, and delivered the first load of seven tones to Witton Park.