Rhif Archif
6429418
Disgrifiad
No9 adit tunnel, looking N along No9 adit from 'Piccadilly Circus', Rhosydd Slate Quarries complex.
Enw Casgliad
Investigators' Photographs
Cyfrwng
Photo.
Cychwynnwr
Stephen R. Hughes
Dyddiad
1996-09-01