Monk Bridge Iron Co
1851 The Monkbridge Iron Co began business
Built up a large trade in high-grade iron and steel, chiefly for railway work, both at home and abroad; its products included Best Yorkshire iron.
1858 Amalgamated with the Airedale Foundry.
1862 James Kitson, Junior was effectively head of the firm from 1862
One of the earliest to install a Siemens steel furnace.
Frederick withdrew through ill health some years before his death in 1877
1876 James Kitson retired
John Hawthorn Kitson (1843–1899) assisted his brother in running the firm
1876 Members of the Iron and Steel Institute visited their ironworks 
Made steel using the Siemens–Martin open-hearth process.
1886 Became a limited liability company still exclusively under family control; renamed as the Monk Bridge Iron and Steel Co
Sources of Information
- The Engineer of 15th August 1876 p180
- The Engineer 1882/07/21
- Biography of James Kitson, first Baron Airedale, ODNB