Situated on the eastern slopes of Caer Bran, this mining area encompasses three distinct lodes, each trending in different directions: northwest, northeast, and southeast. The northwest-trending lode, although present, was not actively mined, serving as a continuation of the lode worked by Caer Bran Mine to the north of the hill’s summit. The northeast-trending lode was explored through six shafts situated in a line west to northeast of Boswarthen hamlet. An additional three shafts further east opened up the southeast-trending lode. Although coordinates mark the location where an engine house ruin was noted on the 1887 Ordnance Survey map, it no longer exists. Operating under the name Penzance Consols, the mine produced 10 tons of black tin between 1853 and 1854.