Possible Clues:

• By the sound of it, put this shaft onto mine, and into it (4).
• Partly traditional passage of mine
• Shaft's end
• Horizontal mine drainage shaft
• Horizontal mine passage
• Ore seeker's entrance
• The way to put on extra, by the sound of it, into mine
• On his way to mine, Father comes up with it
• Sounds as if one might tot it up, by the way, into the underground
• Da, it is a mine entrance