Just goes to show what geologists know. The Tor did indeed produce smoke but was never a volcano. It is, in fact, the last remaining remnant of the once mighty commercial empire that was Ebenezer Crudworths Smokeworks. At its height in the 1890's there were 7 such chimneys belching out the finest thick, black, choking smoke in the whole of Victorian England. By not having to worry about any other associated manufacturing process, Crudworth was able to concentrate his efforts on smoke alone and became a major supplier of condensed smoke to the Empire. Wherever the map of the world was shaded red colonial officials could open a tin of Crudworth's finest and be immediately transported back to good old Blighty. Alas, fortunes declined after the 14/18 war and in 1925 Lungrot Crudworth, Ebenezer's only son, was forced to close the works and sell the land to pay off his gambling debts.