• P203061
    • Corwen Slate Mine, about 2 m. E. of...
    • P203062
    • Corwen Slate Mine, about 2 m. E. of...
    • P203063
    • Corwen Slate Mine, about 2 m. E. of...
    • P203067
    • Corwen Slate Mine, about 2 m. E. of...
    • P602747
    • A5 road cutting at Glyn Bends, near...
    • P751310
    • Roofing slate. Medium quality. Corwen,...
    • P751311
    • Roofing slate. Medium quality. Corwen,...
    • P751312
    • Roofing slate. Medium quality. Corwen,...
    • P751313
    • Roofing slate. Medium quality. Corwen,...
    • P751314
    • Roofing slate. Medium quality. Corwen,...
    • P751315
    • Roofing slate. Medium quality. Corwen,...
    • P751316
    • Roofing slate. Medium quality. Corwen,...
    • P751317
    • Roofing slate. Medium quality. Corwen,...
    • P751318
    • Roofing slate. Medium quality. Corwen,...
    • P751319
    • Roofing slate. Medium quality. Corwen,...
    • P751320
    • Roofing slate. Medium quality. Corwen,...