| 11. | Grissom appears on the Grissom U . S . Geological Survey Map.
|
| 12. | The mill was marked on the first 6 " Ordnance Survey map.
|
| 13. | It appears on the Noxen U . S . Geological Survey Map.
|
| 14. | Dancyville appears on the Dancyville U . S . Geological Survey Map.
|
| 15. | Leavenworth appears on the Leavenworth U . S . Geological Survey Map.
|
| 16. | Chesapeake appears on the Cheriton U . S . Geological Survey Map.
|
| 17. | Gertrude appeared on West Virginia Geological Survey maps as late as 1929.
|
| 18. | Wheelockville appears on the Blackstone U . S . Geological Survey Map.
|
| 19. | Ordnance Survey maps remain in copyright for fifty years after their publication.
|
| 20. | However, an early Ordnance Survey map names it as a castle site.
|
