Rhif Archif
6429415
Disgrifiad
No9 adit tunnel, 5/9 incline trwnc, looking to foot of incline, Rhosydd Slate Quarries complex.
Enw Casgliad
Investigators' Photographs
Cyfrwng
Photo.
Cychwynnwr
Stephen R. Hughes
Dyddiad
1996-09-01