Reference | Title | Date |
RHP146000 | National Coal Board Inspectorate plans of workings | 1957- |
RHP146000/874 | Plans of workings at Ordnance Survey National Grid Reference NT 36/3668 Dalkeith Colliery, Chalkieside, Airybank House, Northfield, Cousland, Westfield, Crossgatehall, Smeaton Shaw and Nunnery Quarry named on these plans. | 1964-1969 |