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The Wrexham-area coalmasters who took coal leases on the Ffrwd estate from John Griffiths in the 1790s and sank the early pits at Coed y Brain and Cae Gwydd.
| Mine | Region | Years |
|---|---|---|
| Ffrwd Colliery | Wrexham | 1792–? |
Record created: 9 September 2026 · Last researched: 9 September 2026
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