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Worked Morfa Du in its own right from 1881 to 1904, following its 1877 lease of the western end of the Parys Mountain deposit.
| Mine | Region | Years |
|---|---|---|
| Morfa Du Mine | Anglesey | 1881–1904 |
Record created: 1 September 2026 · Last researched: 1 September 2026
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