Later South Pheonix. This small tin mine began operations around 1830. By 1836, it had joined forces with other nearby small mines to form the Cornwall Great United Mines. After the dissolution of this conglomerate a few years later, the mine remained inactive until 1847, when it merged with Greenhill Mine to create South Phoenix Mine.

Between 1888 and 1892, the Wheal Prosper section of the mine accounted for a significant portion of South Phoenix Mine’s tin production, raising 309 tons of black tin during that period. The Wheal Prosper section encompassed three closely situated ESE-trending lodes, situated along fault fissures at the contact between granite in the south and killas overlying a depression in the granite surface to the north.

The most northerly of these lodes, Wheal Prosper No. 1 Lode, was accessed from Wheal Prosper Shaft to a depth of 60 fathoms below the surface, as well as from a crosscut adit driven from the valley to the south beneath Minions village. This adit intersected the lode 30 fathoms east of Wheal Prosper Shaft, 10 fathoms below the surface. New Shaft, located 120 yards west of Wheal Prosper Shaft, extended only a short distance below the adit. The lode was developed over a length of 100 fathoms on all levels, with only a third of the identified ground being extracted. Stopes were primarily present on the upper levels, with rich ore bunches encountered in isolated areas during prospecting in 1907-1908, though the overall grade of the lode was found to be poor.

Wheal Prosper No. 2 Lode was worked on a small scale, with crosscuts driven from the workings on No. 1 Lode, while No. 3 Lode remained untouched. The grid reference marks the location of Wheal Prosper Shaft.