No. 1 Area. Mountain Colliery. No. 2 Underground Borehole down from the Swansea Six Feet Seam. Four Seams at 49ft.10ins to 968ft8ins. Thin Coals Between 470ft and 630ft. Sep 1954
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- ReferenceGB 216 D/D PRO/NCB/6/108
- Dates of CreationSep 1954
- Language of MaterialEnglish
- Physical Description1 file