THE CABINET OF JOHN WILLIAMS, ESQ. is at Scorrier House, about two miles east of Redruth, and may therefore be visited by the mineralogist in the present excursion. This collection stands unrivalled in the magnificence of its specimens of _Red Oxide of Copper_, in octohedrons, cubes, and capillary crystals; it also contains the finest specimens of _Arseniate of Copper_ in very perfect obtuse octahedrons;--a mass of _Uranite_, which in size and beauty is superior to any specimens ever discovered;--_Blende_, in octohedrons and cubes;--_Native, and Ruby Silver_; and a specimen of the _Muriate_ of that metal (_Horn_ Silver) so well known for its value, that it may be said to constitute one of the most interesting objects in the collection. The _Arseniate of Lead_, in six-sided prisms, a most beautiful mineral, which was first analysed by Mr. Gregor, and has been found only in _Huel Unity_, may be seen in this cabinet in its most perfect forms. The collection of Mr. Carne has been already noticed in our account of Penzance, at _page_ 31. In order to collect the various minerals of the county the stranger must apply to the different dealers,[118] (_rapax et sordidum pecus_) and make the best bargain he is able; he may also occasionally purchase some good specimens of the miners at the various mines he may happen to visit. In his rambles we recommend him to visit Saint Agnes, where are the _Trevaunance_, and _Seal Hole_ mines, from which have been raised the most beautiful specimens of crystallized Tin in the world, accompanied occasionally with _Topazes_, and twenty-four-sided _Fluor_. Here too may be seen a geological phenomenon of considerable interest,--the slate of the coast intersected with _Porphyry Dykes_, Saint Agnes' Beacon is also well worthy of observation; it is an insulated eminence of a pyramidal form, entirely covered with _debris_, and is composed of _Slate_, although it rises 664 feet above the level of the sea. Saint Agnes is the birth place of the celebrated artist OPIE,[119] and the tourist may be gratified by inspecting many of the earlier productions of his pencil. But we now take our leave of the Mineralogist, and shall attend the Antiquary in order to inspect _Carn-breh hill_, which rises a little to the south-west of Redruth, to an elevation of 697 feet; its principal interest is derived from the lucubrations of Dr. Borlase, who regarded it as having been the grand centre of Druidical worship, and he asserts that, in his time, the remains of the monuments which were peculiar to that priesthood were to be easily recognized, such as _Rock Basins_; _Circles_; _Cromlechs_; _Rock Idols_; _Karns_; _Caves_; _religious enclosures_; _Logan Stones_; a _Gorseddau_, or place of elevation, whence the Druids pronounced their decrees; and the traces of a _Grove of Oaks_!--this is all very ingenious and imposing, but is there any rational testimony in support of such an hypothesis? are there any just grounds for considering