© Alun John Richards, 1998. Excerpted from: The Slate Quarries of Pembrokeshire Gwasg Carreg Gwalch. ISBN 0-86381-484-0 The Slate Quarries of Pembrokeshire
DANDDERWEN (Whitland Abbey, Tan y Dderwen) SN126269 & 127268
The early history and the date of opening of these two adjoining diggings which included both ‘Green’ and ‘Blue’ veins is unclear, but 127268 or Lower Dandderwen [...]
