If the corridors of our abode possess this wealth and splendour, what shall we say of the dwelling-places, or of the cities? They are filled with heaps of artistic marvels, of frescoes, enamels, gold and silver plate, bronzes and pictures, the acme and quintessence of musical emotions, of philosophic conceptions, of poetic dreams, enough to baffle all description, and weary all admiration. We have difficulty in believing that the labyrinth of galleries, subterranean palaces and marble catacombs, all named and numbered, whose manifold nomenclature recalls all the geography and history of the past, have been excavated in so few centuries. That is what perseverance can do! However accustomed we may be to this extraordinary sight, it still at times happens when wandering alone, during the hours of the siesta, in this sort of infinite cathedral, with its irregular and endless architecture, through this forest of lofty columns, massive or in close formation, displaying in turn the most diversified and grandiose styles, Egyptian, Greek, Byzantine, Arab, Gothic, and reminiscent of all the vanished and venerated floras and faunas, when it is not above all profoundly original ... it happens, I repeat, that panting, and beside ourselves with ecstasy, we come to a standstill, like the traveller of yore when he entered the twilight of a virgin forest, or of the pillared hall of Karnak.