No. 9 Area. Onllwyn No. 3 Colliery. Eighteen Feet and Cornish Four Feet Seams (1754) Nov. 1955
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dpro/ncb6/d/dpro/ncb/6/137
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- ReferenceGB 216 D/D PRO/NCB/6/137
- Dates of CreationNov. 1955
- Language of MaterialEnglish
- Physical Description1 file