sentences:  By 1851 Derwent Iron had opened a mine in the area and began moving ironstone to Consett.The iron ore from Cleveland is high in phosphorus and needs to be mixed with purer ores, such as those on the west coast in Cumberland and Lancashire.In the early 1850s this ore was travelling the long way round via Newcastle and Carlisle from the Barrow-in-Furness area, and Durham coke was returning.