Open questions: Pembrokeshire
Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 11 such claims on 8 records. All regions.
Bonville's Court Colliery
- Welsh Coal Mines dates the opening to 1842 under the Myers Mining Co.; the Durham Mining Museum gives 1855. (disputed)
Hook Colliery
- Hook's smokeless anthracite was reputedly favoured by Queen Victoria and used in royal palaces. (uncertain)
Landshipping Colliery
- Coflein records the shaft as 67 feet deep; Welsh Coal Mines gives 67 yards. (disputed)
Loveston Colliery
- Contemporary newspaper reporting described the colliery as owned by a French company, while Welsh Coal Mines records the operator as the Loveston Colliery Co. Ltd. The two have not been reconciled. (disputed)
Preseli Bluestone Quarries
- The quarrying interpretation is disputed: sceptical geologists argue Neolithic people could have collected standing stones from glacial erratics without quarrying bedrock, and that glacial transport rather than human haulage may explain at least some of the bluestones. (disputed)
Rosebush Slate Quarry
- An 1889 Ordnance Survey map annotation records that the quarry had provided slate for the roof of the Palace of Westminster, presumably during the post-fire rebuild begun in 1840, though the same source notes the slate was reportedly not of especially good quality for roofing. (uncertain)
Thomas Chapel Colliery
- The first pits of Thomas Chapel Colliery, the Old Wheel Pit and the Hay Pit, were sunk in 1784, with more shafts in the 1790s and in 1836-40. (disputed)
- Thomas Chapel coal mine had opened by 1843, and was the northern end of the Saundersfoot Railway. (disputed)
- The 1842 Royal Commission report names Thomas Stokes as proprietor of Thomas Chapel Colliery, and it was owned by Thomas Stokes and Company in 1842. (disputed)
- In 1842 Thomas Chapel was owned by Messrs Morgan, Hughes and Co.; a court notice of 1854 names Morgan Hughes 'formerly of Thomas Chapel Colliery'. (disputed)
Wood Level Colliery
- Wood Level is repeatedly described in secondary accounts of the Pembrokeshire Coalfield as the last colliery working anywhere in the county, closing in 1950 -- a mundane, consistently repeated fact, though no primary listing or plan naming Wood Level itself by that name has yet been directly read. (uncertain)