Ironworks

But, like more than one similar North Wales beauty-spot, there had to be (at least at the time of which I write), a quarry, or ironworks, or some kind of industrial plant, which lay perpetually under a cloud of yellowish smoke—literally a blot on the landscape.

Many of its cottages were built for quarrymen when local workings provided limestone for the great 19th-century ironworks at Nantyglo.