A Geological Survey Report published in 1893 refers to:
a thin and not very pure, but remarkably persistent, bed of coal . . . [which] may be traced for three miles or more in the neighbourhood of Reagill. It is rarely more than 8 or 10 inches in thickness; but at one time, judging by the number and extent of workings, . . . must have been regarded locally as of considerable importance.
The thin seams of coal have not been worked for more than 150 years.
Tyson, B. (2004). Coal mining at Reagill, Sleagill and Newby, 1683-c.1837.. Transactions of the Cumberland & Westmorland Antiquarian & Archaeological Society 4 (series 3). Vol 4, pp. 175-200.
https://doi.org/10.5284/1064638
























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