| 1565 - 1570 | Matthew Bee of Ninebanks worked Grewslacke, Spartywell and Bates Hill | #1 | |
| 1640 | Sir John Fenwick leases the lead mines to William Pearson for 30 years | #1 | |
| 1660 | Lease transferred to William 'Barkett' | #1 | |
| 1667 | Sir Thomas Fenwick leases mines to Sir William Blackett for 23 years. (also sells his estates including Parish of Allendale to Sir William Blackett) | #1 | |
| 1684 | Shield Ridge Level driven along the West Cross Vein to drain Coalcleugh veins above the Great Limestone | #1 | |
| 1709 | Whitfield Mill (Smelter) leased by London Lead Company | ||
| 1711 | Miner's laid off causing distress in parish | #1 | |
| 1745 | London Lead Company buys Nenthead Mill and starts to phase out Whitfield Mill | ||
| 1753 | Coalcleugh general cash book starts (ends 1835) | #6 | |
| 1755 | Bates Hill trial | #6 | |
| 1760 | Early level at Barney Craig | #1 | |
| 1762 | Kilhope in Weardale comes under the control of Coalcleugh | ||
| 1765 | Hydraulic engine installed at Coalcleugh mine | #1 | |
| 1805 | John, Peter and Christopher Swindle partners in bargains at Coalcleugh | #8 | |
| 1806 | Barney Craig Level started | #1 | |
| 1806 | Heartycleugh - New Level being driven | #1 | |
| 1807 | Crushing mill ordered for Coalcleugh | #1 | |
| 1811 | Whitfield Mill closed | ||
| 1812 | John Swindle dies. Missing from future bargains of his partnership | ||
| 1813 | Advance owed by Christopher Swindle (never repaid) who does not appear in future bargains. Recorded as working at Nenthead Smelt Mill 1824, and having died by 1830 | #6,#8 | |
| 1823 - 1828 | Hazelwell - level driven in 1823. Mine worked until price of lead fell | #1 | |
| 1825 | Peter Swindle bargain at Welhope | #7 | |
| 1826 | Thomas Coats agreement to develop mine at Blackcleugh | ||
| 1828 | Thomas Coates agreement to develop mine at Farneycleugh for 3 years | Peter Swindle one of the 16 partners in the Farneycleugh agreement. | #7 |
| 1830 | Advances owed by George Swindle and Christopher Swindle | #6 | |
| 1831 | Advance owed by John Swindle | #6 | |
| 1832 | Advances owed by George Swindle and John and Peter Swindle | #6 | |
| 1833 | Advances owed by Peter, Thomas and George Swindle | #6 | |
| 1834 | Advances owed by Peter, Thomas and Thomas Swindle | #6 | |
| 1843 | Reference to Christopher Swindle 'timbering the vein' at Coalcleugh | #9 | |
| 1899 - 1913 | Coalcleugh worked by Vieille Montagne Zinc Company | #1 |
References
1 "Allendale, Tynedale and Derwent Lead Mines" R.A. Fairburn; Northern Mines Research Society May 2000
2 "The History of Lead Mining in the North East of England" L. Turnbull; Harold Hill and Son 1975
3 "Leadmining Families - The Westgarths and the Forsters" B.P. Wilkinson; (Out of the Pennines pp19-33) Friends of Kilhope 1997 (Also www.westgarth.org.uk)
4 "A History of Lead Mining in the Pennines" A. Raistrick and B. Jennings; Kelsall and Davis 1989
5 "Two Centuries of Industrial Welfare - The London (Quaker) Lead Company 1692 - 1905)" A. Raistrick; Kesall and Davis 1988
6 "Coalcleugh General Cashbook 1753 - 1835" ; Northumberland Record Office NRO 672/e/3D
7 "Kiersleyrow Bargain Book from 1805 to 1830"; Northumberland Record Office NRO 672/e/3H
8 "Coalcleugh Bargain Book 1805 to 1816"; Northumberland Record Office NRO 672/e/3A.1
9 "Coalcleugh - Journal of the Mine" - extract at Hexham Library