Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/679 | Plans of workings at Ordnance Survey National Grid Reference NT 36/0088 Blairhall Colliery, Lord Bruce Shaft, Lady Victoria Shaft, East Grange, Newfarm, Over Inzievar and Rennies Well (in ruins) named on these plans. | 1962-1964 |