It was well that he did so, for it is an error to suppose that the belt-sewer has two outlets, the one in the direction of Bercy, the other towards Passy, and that it is, as its name indicates, the subterranean girdle of the Paris on the right bank. The Grand Sewer, which is, it must be remembered, nothing else than the old brook of Ménilmontant, terminates, if one ascends it, in a blind sack, that is to say, at its ancient point of departure which was its source, at the foot of the knoll of Ménilmontant. There is no direct communication with the branch which collects the waters of Paris beginning with the Quartier Popincourt, and which falls into the Seine through the Amelot sewer above the ancient Isle Louviers. This branch, which completes the collecting sewer, is separated from it, under the Rue Ménilmontant itself, by a pile which marks the dividing point of the waters, between upstream and downstream. If Jean Valjean had ascended the gallery he would have arrived, after a thousand efforts, and broken down with fatigue, and in an expiring condition, in the gloom, at a wall. He would have been lost.