It was not towards the Seine that he was proceeding. The ridge which the soil of Paris forms on its right bank empties one of its watersheds into the Seine and the other into the Grand Sewer. The crest of this ridge which determines the division of the waters describes a very capricious line. The culminating point, which is the point of separation of the currents, is in the Sainte-Avoye sewer, beyond the Rue Michel-le-Comte, in the sewer of the Louvre, near the boulevards, and in the Montmartre sewer, near the Halles. It was this culminating point that Jean Valjean had reached. He was directing his course towards the belt sewer; he was on the right path. But he did not know it.
Every time that he encountered a branch, he felt of its angles, and if he found that the opening which presented itself was smaller than the passage in which he was, he did not enter but continued his route, rightly judging that every narrower way must needs terminate in a blind alley, and could only lead him further from his goal, that is to say,