MineArchiveGraig Coal Company
A Merthyr Tydfil coal company formed by William Thomas, son of Robert and Lucy Thomas, in 1852 to work the Graig property on the Four Foot seam; it was recorded as the owner of Waunwyllt in an 1869 list and ran until Locket and Marychurch took over in 1863.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Waunwyllt Level | Merthyr Tydfil | ?–1870 |
Record created: 28 September 2026 · Last researched: 28 September 2026