|Content Description||The 1921 6 inch Ordnance Survey map (Notts XIX N.W.) shows Edwinstowe and surrounding area including Clipstone, Carburton, Perlethorpe, Ollerton, Boughton and Rufford Park. The plan has been annotated to record coal workings - mainly the Thoresby Colliery workings of the Bolsover Colliery Company and also the Welbeck Estate and Rufford Estate Leases - and shows the many seams mined in the area, with dates etc.|
The colours on the map show the coal seams: High Hazel (highest) in green; Barnsley Hard (middle) in pink; Park Gate (deepest) in blue.
Earl Manvers leased mineral rights under the Thoresby estate to the Bolsover Colliery Company in 1922 [see Ma 8 D/8]. The first shafts were dug in 1925 and the first coal extracted two years later. By the terms of the lease the Company had to maintain a map showing past/current/future mining. This particular map does not show the early mining around the mine shaft which suggests that there was another earlier map before this one. The Thoresby estate used the map at one time on a weekly basis to try to predict mining subsidence.