A set of four plans to be viewed together, showing workings from Navigation, Deep Duffryn and Merthyr Vale Pits No.1 and No.2 with other pits also shown. The plans are also annotated with unidentified estate boundaries.
Workings in the Seven Feet Seam, Cynon Valley and Merthyr
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- ReferenceGB 214 DNCB/6/14/1/4/7
- Dates of Creation[c1884-c1936]
- Physical Description4 plans