MineArchiveThomas and Clayton
Owners of Trefrane in the Lists of Mines to 1870, after which David Clayton held it alone until it dropped out of the lists in 1874; the colliery was opened by Thomas and Canton in the 1850s.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Trefrane Cliff Colliery | Pembrokeshire | 1854–1874 |
Record created: 20 September 2026 · Last researched: 20 September 2026