Districts abounding in crystalline rocks are usually uneven, and in this parish the main road, leading from Helston and all the west to Penryn and Falmouth, had to descend Mabe-hill; but in this year (1835) the line has been turned from the south of Tremogh to a vale on the northern side, which reduces the upper level, and converts a precipitous descent into one sufficiently sloped for carriages of every description. The old road has, however, still an attraction for botanists, as the antirrhinum monspessulanum, a plant very rarely found in other situations, grows there abundantly on the banks and hedges. Mr. Tonkin is mistaken in tracing the family of Tremayne, long settled at Heligan, in St. Ewe, from the barton in this parish. That family is unquestionably derived from Tremayne in St. Martin’s, on the Helford river. Mabe measures 2029 statute acres. Annual value of the Real Property, as £. _s._ _d._ returned to Parliament in 1815 2383 0 0 Poor Rate in 1831 317 8 0 Population, { in 1801, | in 1811, | in 1821, | in 1831, { 387 | 396 | 457 | 512 giving an increase of 32 per cent. in 30 years. GEOLOGY, BY DR. BOASE. One corner of this parish, immediately north of Penryn, extends on the slate in the form of a very narrow and short stripe; but all the remainder rests entirely on granite, which is for the most part coarse-grained and crystalline, abounding in porphyritic crystals and felspar. It, however, also contains numerous beds of a finer quality, which being well adapted for building is extensively quarried. ST. MABEN, OR ST. MABIN. HALS. Is situate in the hundred of Trigg, and hath upon the north St. Kewe, east St. Udye, south Helland, west Egleshayle. For the modern name of this church, it signifies, in the holy or sacred son, or a church dedicated and consecrated in honour of God the Son, in opposition to Arianism, as aforesaid under Mabe. In the Domesday Book 1087, 20 Will. I. this district was taxed under the jurisdiction of Treu-es-coit, i. e. the wood-town, or town of wood; still the voke lands of a manor, the lords whereof first endowed this church, whose names were ――――, together with the Duke or Earl of Cornwall. In the Inquisition of the Bishops of Lincoln and Winchester, 1294, into the value of Cornish benefices, Ecclesia de Maben in decanatu de Trig Minorshire, is rated at £8. In Wolsey’s Inquisition, 1521, it is rated at £36. The patronage formerly in the lords of the manor aforesaid, and the Duke of Cornwall, that endowed it; afterwards in the Duke and Louis alternately, the which Louis sold it to Boscawen, now in possession thereof; the incumbent Hill; and the parish rated to the 4_s._ per pound land-tax 1696, at £158. 19_s._ by the name of St. Mabyn or Mabin aforesaid.