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- Quarries and quarrying Essay on (1889), NLW MS 22838B -- Wales -- Moel Tryfan (Caernarfonshire), 1 results
- Quarries and quarrying Essay on (1889), NLW MS 22838B -- Wales -- Dyffryn Nantlle (Caernarfonshire), 1 results
- Slate industry Essay on (1889), NLW MS 22838B -- Wales -- Moel Tryfan (Caernarfonshire), 1 results
- Slate industry Essay on (1889), NLW MS 22838B -- Wales -- Dyffryn Nantlle (Caernarfonshire), 1 results