When he entered, Gavroche followed him mechanically with his eyes, admiring his gun; then, all at once, when the man was seated, the street urchin sprang to his feet. Anyone who had spied upon that man up to that moment, would have seen that he was observing everything in the barricade and in the band of insurgents, with singular attention; but, from the moment when he had entered this room, he had fallen into a sort of brown study, and no longer seemed to see anything that was going on. The gamin approached this pensive personage, and began to step around him on tiptoe, as one walks in the vicinity of a person whom one is afraid of waking. At the same time, over his childish countenance which was, at once so impudent and so serious, so giddy and so profound, so gay and so heartbreaking, passed all those grimaces of an old man which signify: Ah bah! impossible! My sight is bad! I am dreaming! can this be? no, it is not! but yes! why, no! etc.