This early 19th-century English oil painting depicts John Sanderson (1777-1852), a steel merchant from Sheffield.By the end of the 19th century, Sheffield was one of the world’s leading industrial cities and its reputation was built on steel. During the 1840s, it produced around 90% of British steel and around half of such in Europe. Its hills were abundant with coal and other raw materials, while its confluence of rivers provided ample power.Sanderson Brothers & Co, led by Thomas, John, James and Edward, were integral to this success. And here, in this portrait from around 1838, we see John Sanderson. The brothers were based at Darnall Steelworks and Don Valley Glassworks. Both sites are now scheduled monuments.John was born in 1777 to Charles and Sarah and spent much of his life at New Hall Brightside Bierlow, Sheffield. Little is known about this busy entrepreneur aside from occasional newspaper reports. In 1836, he was mentioned in a local paper following his connection...