Example image of eyePlorer eyePlorer map for 'Hartley Colliery Disaster': 1862 Disaster England Mining accident Northumberland Coal dust Firedamp Methane Steam engine January 16 Brattice Ventilation (architecture) Asphyxia Coal mining Victorian era Cast iron Fatigue (material) Earsdon 1862 in the United Kingdom W. & D. Downey New Hartley Kate Humble List of disasters of the United Kingdom and preceding states Seaton Sluice History of coal mining