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Keywords from Image Description:
cymru wales llyfrgell genedlaethol cymru llyfrgellgenedlaetholcymru national library of wales nationallibraryofwales charles geoff charlesgeoff negydd ffilm negyddffilm film negatives filmnegatives slate quarrying slatequarrying industry men bethesda penrhyn quarry penrhynquarry group portraits groupportraits blackandwhite monochrome