
Headgear, Ventilating Shaft, Kilsby Tunnel
1837
1837
1836
1837
1837
1836
1837
1836
1836
1837
1837
1837
1838
1837
1837
1837
1837
1837
1837
1837
1837
1837
1837
1837
1836
1837
1837
1837
1838
1967
1967
1967
1838
1837
1836
1837
1837
1839
1837
1837
1839
1837
1837
1838
1837
circa 1837