A prominent series of levels and stopes up the hillside following a NNE-SSW lode near a promontory on the west side of Llyn Geirionydd.

Probably worked late 18C, but there are no records until 1838 which then show the sett being worked in an intermittent manner for 20 years by William Williams.

30 tons raised between 1854 and 1857 when R.M. Griffiths had up to 12 men at work.

After laying idle for 30 years, blende was recovered from the tips between 1891 and 1892 by Evan Thomas.