faithful guard, like a good dog, with a thousand suspicions in his mind.

All at once, while he was scrutinizing the great city with that eye which nature, by a sort of compensation, had made so piercing that it could almost supply the other organs which Quasimodo lacked, it seemed to him that there was something singular about the Quay de la Vieille-Pelleterie, that there was a movement at that point, that the line of the parapet, standing out blackly against the whiteness of the water was not straight and tranquil, like that of the other quays, but that it undulated to the eye, like the waves of a river, or like the heads of a crowd in motion.

This struck him as strange. He redoubled his attention. The movement seemed to be advancing towards the City. There was no light.