Ashton Mine appears on the Ordnance Survey County Series (Caernarvonshire XLV14) 1889 where it is marked as disused. The mine is among a cluster of lead mines on the coast near Abersoch that were worked since the seventeenth century.

Source: David Gwyn & Merfyn Williams (1996) `A Guide to the Industrial Archaeology of North West Wales?. Association for Industrial Archaeology

RCAHMW, 17 November 2011.