Related Clues:
- Potential space colony activity
- Excavation
- Pit activity
- Extracting ores
- Working at night for Dr. Frankenstein?
- Collier's work
- Extracting ore etc. from the earth
- Extracting ores from the earth
- For this you have go down and in, in the Chinese way
- Twice in in the sports car and you'll be working for the underground
- Getting down to it; getting twice in the inside
- By the sound of it, Dublin in a car for the underground
- How a sports car gets about twice in for the underground
- Extracting ores or coal from the earth
- De Beers business