The most striking rocks have been fancifully named after the celebrated structures they resemble. We find the Château Gaillard, the Sphinx, the Gate of Mycenæ, or of the Lions, the Street of Tombs supposed to resemble Pompeii, some of colossal dimensions. Thus the citadel measures a hundred and fifty feet from the ground, at this point Montpellier-le-Vieux attaining an altitude of two thousand five hundred feet above the sea-level. When I add that the Cité du Diable measures nearly two miles in length and a mile in breadth, and that its city and suburbs, so-called, cover a thousand hectares, an area a third less than that of Windsor Forest, the enterprising tourist will have some feeble notion of the waste before him. The place is indeed altogether indescribable--surely one of the most striking testimonies to the force of erosion existing on the earth's surface. The explanation of the phenomenon is found here. At a remote period of geological history the action of mighty torrents let loose sculptured these fantastic and grandiose monoliths, bored these arcades and galleries, hollowed these fairy-like caves. Erosion has been the architect of the Cité du Diable, partly by impetuous floods, partly by slow filtration. Water has gradually, and in the slow process of ages, built up the whole, then vanished altogether. Nothing strikes the imagination more than the absolute aridity of the region now. Not a drop left in the bed of ancient lake or river, not a crystal thread trickling down the rock channelled by ancient cascades, and nevertheless abundance of greenery and luxuriant foliage everywhere! The waterless world of stone is not only a garden, but a green forest! Immediately around us flowers, ferns, and shrubs adorn every bit of silvery gray rock, whilst wherever space admits we see noble trees, pines, oaks, beeches, some of marvellous growth, yet perched on heights so remote and lofty as to appear mere tufts of grass. And then the wonderful deliciousness and invigorating quality of the air! It is like tasting the waters of the Nile, an experience never to be forgotten. Those, indeed, who have once breathed the air of the Lozère will have only one desire: to breathe it again.