D1702 | Hardwick Colliery Company, Heath | [20th cent] | Hardwick Colliery Company, Heath | Derbyshire Record Office |
D2716/Box8/1 | Hardwick Colliery Company | 1888-1900 | Shipton Hallewell & Company, solicitors | Derbyshire Record Office |
LS/338.2 | The Hardwick Colliery Company. | 1970 | | Derbyshire Record Office |
LS/625.24 Oversize | Private owner wagons: a ninth collection. | 2010 | | Derbyshire Record Office |
NCB/A/BUT/4/6/7 | Butterley Company file on inspections for the National Association of Colliery Managers... | Apr 1934-Apr 1935 | Butterley Company | Derbyshire Record Office |
NCB/A/HAR | Hardwick Colliery Company Limited | 1902-1960 | Hardwick Colliery Company Limited | Derbyshire Record Office |