Possible Clues:

• Shafted entrance
• Passage from 'Clemenza di Tito'
• Horizontal passage leading into a mine
• Approach of mine having commercial appeal
• Almost horizontal shaft into a mine, for access or drainage
• Entranceway for a miner
• Passage from pithead, I think?
• Almost horizontal shaft into a mine used for access or drainage
• Passage of time following Ms Lupino's retirement
• A way into a mine