Lead mining and smelting in Northumberland
The earliest Swindales (Swindles etc) in the north of England were possibly enticed from Derbyshire in the middle of the 17th century as skilled lead smelters, bringing the latest technology to the North Pennine orefields. This painting 'Lead Processing at Leadhills: Smelting the Ore' by David Allan (Out of Copyright, National Galleries of Scotland) is from a century later at Leadhills in south Lanarkshire.