Three miners with a crane and timbers

Three miners with a crane and timbers, National Colliery, Porth; foreground, in the centre, a pile of broad planks, on the left, a wagon, on the right, logs / pit props in a wagon; middleground, three miners standing by the base of a crane; background, mine buildings, a pipe, telegraph poles, wires and a partly wooded hillside. Small black framing border. Black and white image with a range of tones