Full account of the mine's history in J.Bennett & R.W.Vernon "Mine sof the Gwydyr Forest part 7", Warrington, 1997, pp.45-50.
Comprised five adits and two shallow shafts, all of which seem to have been scarcely more than trials, having produced only a couple of tons of lead and zinc ore in the mid nineteenth century when worked under the name Bryn y Pyll. Reopened late 1870s as North D'Eresby Mountain, an essentially fraudulent promotion. Reopened as Conway Lead & Silver Mine just before the Great War; in 1915 the lowest adit was stated to be 133 yards long; the venture was abandoned in 1920.