Small underground working.*
Publications (3)
- Cozens, Lewis., (1972). The Mawddwy, Van and Kerry Railways [reprint]. The Oakwood Press
- Richards, Alun J. (2013); Slate Quarrying in Wales; Gwasg Carreg Gwalch; ISBN 1-84527-026-6
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
