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| Archive Reference / Library Class No. | D307/B/19/1 |
| Title | General account book/ledger of Robert Thornhill, including lead mines (Hard Nill and Water Hole, Hassop), household, farming, rents, wages and taxation. |
| Date | c1768-1829 |
| Description | Conservation work was carried out on this volume in 2015 as a result of a project funded by National Manuscripts Conservation Trust. During this work, fragments of metallic appearance were found inside the volume; analysis by the British Geological Survey later confirmed that they were lead ore, of a variety commonly found in the area. The samples can be found packaged with the original binding. |
| Extent | 1 volume |
| Level | Item |
| Repository | Derbyshire Record Office |
| Archive Creator | Thornhill family of Great Longstone |
| Related Material | For the original binding see M127/D2 |