Cambrian
| Alternative name | Cwm Mawr No. 1 ? |
|---|---|
| Location | SH634322 |
| Parish | Llanfair |
| Owners | 1869 S J Hennis |
| Production and Employment | |
| Transport | |
| Remains |
In May 1869 it was reported that a seam of manganese over 2000 ft in width had been discovered [MJ 1869 p. 336].