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Shots of people exploring a cave and potholing. We then see a man who lives in a sandstone cave. He provides a commentary about his life within the cave and we see him lighting a fire, cleaning up and tending to his garden outside. We then see a hut in the street for workmen. Inside telephone engineers are at work on the underground network. The final section shows people in underground water works and water gushing out of a pipe.
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