Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/383 | Plans of workings at Ordnance Survey National Grid Reference NS 26/8083 Herbertshire Colliery, Herbertshire House, Drimallier Pit, Planting Mill, Denovan Mains and Anchor Pit noted on this plan. | 1955 |