Rhif Archif
6429416
Disgrifiad
No9 adit tunnel, 5/9 incline trwnc, looking E along gallery 9, Rhosydd Slate Quarries complex.
Enw Casgliad
Investigators' Photographs
Cyfrwng
Photo.
Cychwynnwr
Stephen R. Hughes
Dyddiad
1996-09-01