Lead mine, in operation from c.1705 (first recorded deaths), achieved great productivity from the 1730's, therafter declined; depicted as disused on OS County series (Montgomery. IV.12 1887); some mining features removed/obscured by roadstone quarrying, from c.1913.
Source: Williams 1985 'The Old Mines of the Llangynog District'.
J.Wiles 08.09.04