A tiny derelict building and scattered stones next to a small, overgrown rocky gorge are all that remains of a former water mill, identified as disused on the 1st and 2nd Editions of the 25-inch OS maps (1889 and 1900). The main mill building had been demolished by the 3rd Edition, 1924. The un-named stream draining Llyn Llygieran appears to have been augmented by a diversion from a stream further west, to feed this and other water power users further downstream.
W J Crompton, RCAHMW, 31 July 2008.