8. Harry went on. 'How do they let the cage down? Have you ever been down?'
Coal-miners going down to work.
'I have been down once,' said Jim, stopping in his work and stretching himself. 'This is the way. There is an engine at the top of the shaft'——
'What is the shaft?'
9. 'The pit I told you about. The engine is fixed there and it lets down the cage and pulls it up again. Half-a-dozen men or so can go in it at a time.'
'It must be very strong.'
10. 'Yes, it is, and it has strong chains to hold it. It goes up and down all day long, bringing up the coal.'