metal, as prepared by the Jews, for commerce, during the early workings of the Cornish mines, among which is a fraudulent one consisting of a mass of stone covered with a thin coating of metal. In the collection of Coppers may be noticed _Yellow_ _Copper ore_ with _Opal_ (from Roskeir); _the triple Sulphuret of Antimony, Copper, and Lead_ in various forms; _Ruby Copper_ in cubes; _Quartz_ containing globules of water; the _Hydrargyllite_ or _Wavellite_, in a plumose form accompanied by _Apatite_ in a matrix of Quartz (from Saint Stephen's), _Topazes_ of considerable lustre (from Saint Agnes), _Green Fluor_ in crystals of twenty-four sides (Saint Agnes). A most beautiful and instructive cube of _Fluor_, the surface of which reflects a delicate green hue, but upon being held to the light the crystal exhibits its octohedral nucleus of a purple colour. The mineralogist should also notice a superb octohedron _of Gold_, and a mass of _Stalactitical Arragonite_ from the grotto of Antiparos. Before quitting Menabilly he ought to visit the grotto, built in a beautiful and secluded part of the grounds, near the shore in the port of Polredmouth. It stands at the extremity of a large grove, and is constructed with the finest species of marble and serpentine, with brilliant crystals, pebbles, and shells; its form is that of an octagon, two of the sides of which are appropriated to the door and window which front each other, while the six remaining sides form receptacles for minerals, four of which contain specimens of ores found in the county, and two are filled with organic fossils, polished agates, and jaspers; the intermediate spaces are occupied by shells, coralloids, and various other substances. The roof is composed of _Stalactites_ of singular beauty, and which produce a very striking effect as they are seen through the roughly formed arch which composes the entrance. In this grotto are preserved two links of the chain which were found in Fowey harbour by some fishermen in the year 1776; they are of a triangular form, incrusted with shells and corals, and are supposed to have formed a part of the chain which extended from tower to tower, for the ancient defence of the harbour. Among the mineralogical specimens in this place there is one of _Calcedony_ which deserves particular notice for its beauty as well as magnitude. In the centre of the grotto is a table inlaid with thirty-two polished specimens of granite, all found in the county of Cornwall.