J. H. Clay
Returned in the 1930 List of Mines, of The Manor House, as the owner of the Potts Ghyll mine at Caldbeck, then working with nine men underground.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Potts Ghyll Mine | Cumbria | 1930–? |
Record created: 5 September 2026 · Last researched: 5 September 2026