This is a completely new volume to a long well out of print previous edition with new information, format, new colour and black/ white pictures and drawings.
Author Alan Holmes with Sara Eade (2013) A4, 138pp full colour photos, drawings and plans cost £20.00 plus P&P. . Its inevitably linked very much with the Talallyn Railway and tells the complete history of this important surface and underground quarry includes a chapter dedicated to the social history
Available at
http://www.moorebooks.co.uk/Bryneglwys-Slate-Quarry-Abergynolwyn-Merionethshire.html and also from other good booksellers
Mike