Francesco Marmocchi says, in his geography of the island: "Mineral springs are the invariable characteristic of countries which have been upheaved by the interior forces. Corsica, which within a limited space presents the astonishing and varied spectacle of the thousandfold workings of this ancient struggle between the heated interior of the earth and its cooled crust, was not likely to form an exception to this general rule." Corsica has, accordingly, its cold and its warm mineral springs; and although these, so far as they have been counted, are numerous, there can be no doubt that others still remain undiscovered. The natural phenomena of this beautiful island, and particularly its mineralogy, have by no means as yet had sufficient attention directed to them. Up to the present time, fourteen mineral springs, warm and cold, are accurately and fully known. The distribution of these salubrious waters over the surface of the island, more especially in respect to their temperature, is extremely unequal. The region of the primary granite possesses eight, all warm, and containing more or less sulphur, except one; while the primary ophiolitic and calcareous regions possess only six, one alone of which is warm. The springs of Orezza, bursting forth at many spots, lie on the right bank of the Fiumalto. The main spring is the only one that is used; it is cold, acid, and contains iron. It gushes out of a hill below Piedicroce in great abundance, from a stone basin. No measures have been taken for the convenience of strangers visiting the wells; these walk or ride under their broad parasols down the hills into the green forest, where they have planted their tents. After a ride of several hours under the burning sun, and not under a parasol, I found this vehemently effervescing water most delicious. Piedicroce lies high. Its slender church-tower looks airily down from the green hill. The Corsican churches among the mountains frequently occupy enchantingly beautiful and bold sites. Properly speaking, they stand already in the heavens; and when the door opens, the clouds and the angels might walk in along with the congregation.