LEVAN (ST.), a parish in the hundred of PENWITH, county of CORNWALL, 9 miles (S. W.) from Penzance, containing 490 inhabitants. The living is a perpetual curacy, in the peculiar jurisdiction and patronage of the Rector of St. Burian. Overhanging the sea, at the western extremity of the parish, are the celebrated rocks, or lofty piles of granite, called Castle Treryn, on the pointed summit of one of which the remarkable block, termed the Logan, or Rocking Stone, supposed to weigh about ninety tons, is so nicely balanced, as to be moved to and fro by a single individual. In 1820, though considered almost the greatest curiosity in Cornwall, some sailors dislodged this immense mass, and precipitated it into the abyss below; but this mischievous act exciting a general feeling of indignation throughout the country, steps were shortly afterwards successfully taken to replace it in its old position. There are a well, called St. Levan's, and an ancient oratory in the parish.