MineArchiveSam Thomas and Company
Samuel Thomas's own coal-owning concern, running Ysguborwen Colliery from at least 1867 until his death in 1879, when it passed to his sons John Howard Thomas and David Alfred Thomas, later Viscount Rhondda.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Ysguborwen Colliery | Rhondda Cynon Taf | 1867–1895 |
Record created: 14 September 2026 · Last researched: 14 September 2026