Possible building shown on OS 1st edition and digital mapping possibly associated with lead mining activities (CPAT).

A square stone building, measuring 8m x 8m, surviving to a height of c. 0.5m. The location and shape of this building, and the presence of machinery (although it may not be in situ) suggests that it is associated with the Pen-Y-Gwaith mine.

Helen Whitear and Duncan Schlee, Dyfed Archaeological Trust, 2008.