Stone workings in the Duston area (annotated by Richardson 1904). Names in bold are stone slate quarries.

1. Duston Limestone;
2. Limekiln Quarry;
3. Hopping Hill Brickworks; not annotated;
4. Not annotated
5. Field Pit;
6. Top Pit New Duston Old Duston Pit (Sharp);
7. Tennant’s Quarry = Sharp’s Old Slate Quarry Close, Northampton Sand formation;
8. Richardson’s Slate Pit Plantation, Northampton Sand formation;
9. Cotter Quarry, Harlestone;
10. Larger Quarry;
11. Not annotated;
12. Not annotated;
13. Not annotated;
14. and 15. Harpole Sandpit.