Williamson & Eyton
Williamson and Eyton, a Flintshire smelting company, took on the Esgair Hir and Esgair Fraith lead mines in Ceredigion in 1839-40, building four and a half miles of new road and a large pumping waterwheel to work the renowned 'Welsh Potosi' ground.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Esgair Hir and Esgair Fraith Mines | Powys | 1839–1848 |