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Landed family of Gogerddan near Aberystwyth, mineral lords over much of north Cardiganshire; leased Ystrad Einion to Adam Mason in the 1870s.
| Mine | Region | Years |
|---|---|---|
| Ystrad Einion Mine | Ceredigion | ?–? |
Record created: 24 September 2026 · Last researched: 24 September 2026
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