Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/897 | Plans of workings at Ordnance Survey National Grid Reference NT 36/3872 Fleets Colliery, Dolphingstone Colliery, Dolphingstone, Beatties Row, Birsley Cottage, Bankhead, Caponhall Pit, Rogers Pit, Birsley North Pit and Sandee Pit named on these plans. | [20th century] |