2000, Glenys Crocker, Alan Crocker, Surrey Industrial History Group, Damnable inventions: Chilworth gunpowder and the paper mills of the Tillingbourne After the sale the powdermakers met to agree on the price of gunpowder and the powdermakers in the Lake District, where mills had been established near Kendal in 1763, were concerned about being undersold in Scotland.
Source: wiktionary