Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/556 | Plans of workings at Ordnance Survey National Grid Reference NS 26/9078 Policy Mine, Redding No.23 Pits, Gutterhole Shaft, Woodend, Blair Lodge and Overton noted on these plans. | 1952-1956 |