GWITHIAN, a parish in the hundred of PENWITH, county of CORNWALL, 7 miles (W.) from Redruth, containing 412 inhabitants. The living is a rectory united to the rectory of Phillack, in the archdeaconry of Cornwall, and diocese of Exeter. The church, dedicated to St. Gothian, has been long since demolished, and the ruins, with a considerable portion of the parish, are overwhelmed with sand, blown hither from the sea-shore by violent gales of wind. The sea-rush, the roots of which prevent the further dispersion of the sand, has been planted in sufficient quantity to protect the village from a similar fate. The river Gwithian runs through the parish, in which it is crossed by a bridge, and falls into St. Ives bay. Several mines have been wrought at shallow levels, the lodes being very large, but relinquished from want of capital. A singular kind of sand-stone, considered by geologists a great curiosity, is obtained here, and used in building chimnies instead of brick. A remarkable spring formerly rose amongst the sands, called, from its perpetual bubbling, the Boiling well, which had never been frozen, but an adit lately driven near it has caused its disappearance. There are two moats remaining of extensive earth-works, called Trevarnon Rounds, within which cannon balls have been discovered.