• P751173
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751174
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751186
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751187
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751188
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751189
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751300
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751301
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751302
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751303
    • Slate. Twell Coed Quarry, Nantlle,...
    • P751304
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751305
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751306
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751307
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751308
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751309
    • Slate. Twll Coed Quarry, near Nantlle,...
    • P751321
    • Strong Medium quality new vein....
    • P751322
    • Strong Medium quality new vein....
    • P751323
    • Roofing slate, first qulity, strong....
    • P751324
    • Roofing slate, first qulity, strong....
    • P751325
    • Second Quality roffing slate. Portmadoc...
    • P751326
    • Second Quality roffing slate. Portmadoc...
    • P751327
    • Slate slab, sawn and planed....
    • P751328
    • Slate slab, sawn and planed....
    • P751341
    • Slate sample. Oakley Slate Quarries,...
    • P751342
    • Slate with ribbon pyrites. Ordovician....
    • P751344
    • Slate sample. Oakley Slate Quarries,...
    • P751367
    • Roofing slates:. Dinorwic or Velinheli...
    • P751368
    • Roofing slates:. Dinorwic or Velinheli...
    • P751369
    • Roofing slates:. Dinorwic or Velinheli...
    • P751370
    • Slate (best green roofing). Dinorwic...
    • P751374
    • Slate (best mottled roofing). Dinorwic...
    • P751375
    • Roofing slates:. Dinorwic or Velinheli...
    • P751376
    • Roofing slates:. Dinorwic or Velinheli...
    • P751377
    • Roofing slates:. Dinorwic or Velinheli...
    • P751378
    • Roofing slates:. Dinorwic or Velinheli...
    • P751379
    • Roofing slates:. Dinorwic or Velinheli...
    • P751387
    • Roofing slate (medium bangor). Dorothea...
    • P751388
    • Roofing slate (seconds bangor)....
    • P751389
    • Roofing slate. Pen-yr-Orsedd Quarries,...
    • P751390
    • Roofing slate. Pen-yr-Orsedd Quarries,...
    • P751391
    • Best medium quality roofing slate....
    • P751392
    • Second Dark blue Carnarvon slate....
    • P751393
    • Second Dark Blue slate. Ordovician....
    • P751394
    • Second quality enew vein roofing slate....
    • P751395
    • Strong Medium quality new vein....
    • P751396
    • Medium quality New Vein roofing slate....
    • P751397
    • Roofing slate (gader lake rustic)....
    • P751398
    • Roofing slate (gader lake rustic)....
    • P751399
    • Roofing slate (gader lake rustic)....
    • P751400
    • Roofing slate (gader lake rustic)....
    • P751401
    • Roofing slate (eivion snake rustic)....
    • P751402
    • Roofing slate (eivion snake rustic)....
    • P751403
    • Roofing slate. Eivion Random Green....
    • P751404
    • Roofing slate. Eivion Random Green....
    • P751405
    • Gader Lake Olive Green roofing slate....
    • P751406
    • Slate (Best Blue Dorothea). Caernarvon,...
    • P751407
    • Slate (best purple Dorothea). Unknown...
    • P751408
    • Roofing slate (eivion rustic)....
    • P751409
    • Roofing slate (eivion rustic)....