Section of the Strata at Gregory's Mine,Ashover Dated 26 June 1801, with detailed notes on the uses of various forms of stone under land owned by Sir Joseph Banks and Mr John Gregory, from c1706 to 1803. This is the left-hand side of a two-part map, of which D6413/1/749 comprises the right-hand side. Scale 1 inch: 44 yards (?copy) c1803