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Colliery owners of Abersychan, Monmouthshire, recorded as owning Glyn-nant-ddu in 1878 with members of the Emmanuel family as managers.
| Mine | Region | Years |
|---|---|---|
| Glyn-nant-ddu Colliery | Torfaen | 1878–? |
Record created: 10 October 2026 · Last researched: 10 October 2026
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