There is hardly anyone on earth who is not acquainted with those singular spots, the Glacière, the Cunette, the hideous wall of Grenelle all speckled with balls, Mont-Parnasse, the Fosse-aux-Loups, Aubiers on the bank of the Marne, Mont-Souris, the Tombe-Issoire, the Pierre-Plate de Châtillon, where there is an old, exhausted quarry which no longer serves any purpose except to raise mushrooms, and which is closed, on a level with the ground, by a trapdoor of rotten planks. The campagna of Rome is one idea, the banlieue of Paris is another; to behold nothing but fields, houses, or trees in what a stretch of country offers us, is to remain on the surface; all aspects of things are thoughts of God. The spot where a plain effects its junction with a city is always stamped with a certain piercing melancholy. Nature and humanity both appeal to you at the same time there. Local originalities there make their appearance.