The case is not, however, without example; for, although this tract is distant from the granite both of Redruth and of St. Dennis, yet a small mass of that rock does not exist at Cligga Point, on the confines of the parish. This granite has, indeed, been called by some an elvan, and by others a secondary formation of granite, as has been also that of St. Michael’s Mount; but, although the rock is not in this place of any great extent, it has all the mineralogical and geological characters of the larger masses. Large courses of granite elvan are common in the northern part of the parish, containing short irregular veins and bunches of tin ore. These courses are extensively exposed in the cliffs, and present a singular appearance, somewhat resembling a bank of earth perforated by rabbits’ burrows, in consequence of the miners having taken the ore wherever it has been exposed to view. The Beacon, a high hill near the church town of St. Agnes, merits particular attention. The lower part is formed of a schistose rock, composed of granular felspar intermixed with particles of quartz and minute scales of mica. Ascending towards the summit, the quartz gradually increases in quantity, till at last it becomes the prevailing ingredient of the rock, and preserves it against the natural causes of decay; whilst lower down, where the felspar abounds, the rock is extensively disintegrated. On the side of the hill, about three or four hundred feet above the level of the sea, is a deep deposit of diluvium, consisting of alternate layers of clay and sand. To point out the origin of these layers, and to explain the reason of their occurrence in such an elevated situation, would require long details. For this, and for other interesting particulars respecting the phenomena of this parish, the fourth Volume of Transactions, published by the Geological Society of Cornwall, may be consulted. St. Agnes’ Beacon was chosen as one of the principal western stations in the great Trigonometrical Survey of England. The position of the summit was then determined with extreme accuracy: Latitude 50° 18′ 27″, Longitude 5° 11′ 55″.7. In time 20 m. 47″.7. Height above low water 621 feet. See the Philosophical Transactions for 1800, pp. 636 and 714. [5] It appears, however, by Mr. Tonkin’s notes, that St. Agnes was deemed a distinct parish, and had a parochial chapel in it, so early as the year 1396. A licence to build a new chapel was dated Oct. 1, 1482. _Lysons._ [6] This gentleman was the lessee of the great mine before described. Borlase says, “It is judged that the late Mr. Donnithorne, who had the whole adventure, and worked it at his own expense, in a few years last past got at least 40,000_l._ clear by this mine, and much more he might have raised yearly if he pleased.” [7] For the latter name Hitchins substitutes Thomas Warren, Esq. and Mr. John Tregellas, of St. Agnes. ST. ALLEN. HALS.