Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/503 | Plans of workings at Ordnance Survey National Grid Reference NS 26/8853 Bentyhillocks No.3 bore, Hill of Westerhouse No.1 bore, Springfield No.1 bore and Birniehall No.4 bore noted on these plans. | 1955-1956 |