Note: Following description is from Mindat. For the avoidance of doubt, mineral collecting in the Caldbeck Fells is only allowable under license, which are granted for specific zones.

Adjacent to the Roughton Gill mine, exploits the eastward extension of the Roughton Gill (South) vein. It was established in 1845, with three crosscuts driven south to intersect the vein. Despite promising signs of pyromorphite and cerussite early on, the mine proved to be a financial disaster. Crosscuts, a shaft, and levels parallel to the vein were all developed under the assumption that rich primary ores would be uncovered once the vein was accessed. However, the reality was that the lode was almost barren, resulting in significant financial losses, primarily incurred by the Caldbeck Fells Consolidated Lead and Copper Mining Company. Consequently, the mine was abandoned in 1868.

In the mid-1970s, Cornish mineral dealer Richard Barstow opened a vein exposure near the High Level of the Mexico mine and discovered excellent pyromorphite of ‘old time’ quality. Other collectors subsequently worked the site, uncovering further good material. However, the site has since been backfilled.