There is of course a book on it:
The Surviving Engines of Glyn Pits, Pontypool: Early Steam and Water Power in Local Industry
Description
G Tilley, 192 pp, HB
Describes what remains of the nationally important engines at Glyn Pits, and puts the engines into their historical context. This book is of interest to local people in terms of the remaining industrial archaeology connected with mining and metalworking
Details
Weight: 0.75 kg
Price: £ 15.99
I got my copy from Mike Moore
Cutting coal in my spare time.