Wheal Henry is said to be a less productive tin mine, which was worked from 1839 to 1842. A few scattered tips are located north of Crahan Farm, about 1/2 mile SE of Wendron. Ref.: B. Atkinson: Mining Sites in Cornwall, Vol. 2, Dyllansow Truran (1994)
Kellys Directory "Is in the parish of Kenwyn, 5 miles from Truro, which is the nearest railway station. The nearest shipping place is at Devoran, 3 miles distant. The mine is held under a lease granted by Lord Falmouth. The mine is worked by means of steam power, erected on St Day United Mines. The mine is drained to 130-fathom level. The minerals found in this sett include copper. This mine was first opened in 1842, by the present adventurers, under the name of Wheal Henry. Purser Francis PRYOR Redruth. Captain William KITTO "
Amongst several prominent engine houses extant in the Gwennap area today, Wheal Henry may well be the oldest engine house still standing in Cornwall.
Gwennap Area Mines.