ERTH (ST.), a parish in the hundred of PENWITH, county of CORNWALL, 4 miles (N. E. by N.) from Marazion, containing 1604 inhabitants. The living is a vicarage, in the archdeaconry of Cornwall, and diocese of Exeter, rated in the king's books at £ 14. 1. 0., and in the patronage of the Dean and Chapter of Exeter. Here is a place of worship for Wesleyan Methodists. There is a small sum for the education of children. Near the church is a bridge over the river Hayter, and a little lower down a causeway and bridge, built by subscription, for the convenience of persons going to Penzance, who formerly had to wait for the tide. A bridge, it is supposed, was built about the middle of the fourteenth century, under which ships of large burden sailed till .the haven was choaked up by the sands. Some stone coffins have been lately dug up in this parish. Near the vicarage-house is a double circular intrenchment, called Carhangives, supposed to have been the site of a baronial castle. Pieces of tin have also been found, with inscriptions partly in Greek and partly in Latin, which may be translated, " Near this well was a Roman fort."