Had Jean Valjean had any notion of all we have just stated he would have quickly perceived, merely by feeling the wall, that he was not in the subterranean gallery of the Rue St. Denis. Instead of the old freestone, instead of the old architecture, haughty and royal even in the sewer, with its arches and continuous courses of granite, which cost eight hundred livres the fathom, he would feel under his hand modern cheapness, the economic expedient, brick-work supported on a layer of béton, which costs two hundred francs the metre,--that bourgeois masonry known as _à petits matériaux_; but he knew nothing of all this. He advanced anxiously but calmly, seeing nothing, hearing nothing, plunged into chance, that is to say, swallowed up in Providence. By degrees, however, we are bound to state that a certain amount of horror beset him, and the shadow which enveloped him entered his mind. He was walking in an enigma. This aqueduct of the cloaca is formidable, for it intersects itself in a vertiginous manner, and it is a mournful thing to be caught in this Paris of darkness. Jean Valjean was obliged to find, and almost invent, his road without seeing it. In this unknown region each step that he ventured might be his last. How was he to get out of it? Would he find an issue? Would he find it in time? Could he pierce and penetrate this colossal subterranean sponge with its passages of stone? Would he meet there some unexpected knot of darkness? Would he arrive at something inextricable and impassable? Would Marius die of hemorrhage, and himself of hunger? Would they both end by being lost there, and form two skeletons in a corner of this night? He did not know; he asked himself all this and could not find an answer. The intestines of Paris are a precipice, and like the prophet he was in the monster's belly.