4. 'Where does coal come from, Jim?' he asked.
'Out of the ground, my lad.'
'Does it? Do you dig for it?'
'I don't. But I know somebody who does.'
5. 'If I were to dig for it, should I find any, Jim?'
'Not you! Why, you have to go down ever such a long way before you can even begin to dig.'
6. 'How do you get down?'
'You go down in a thing they call a cage. You can't walk down, you know. It is like going down a deep pit. They call it a mine.'
7. 'Oh, I have heard of coal-mines!'
Dora was taking up one little lump of coal after another, and wondering why it was so shiny if it had really come out of the earth.