Pierre remained silent, so as to let his brother tell the story as he chose. Guillaume had realised that he must confess the truth, but in simple fashion, without detailing the circumstances. "Yes, in an explosion," he answered, "and I really think that I have my wrist broken." At this, Bertheroy, whose glance was fixed upon him, noticed that his moustaches were burnt, and that there was an expression of bewildered stupor, such as follows a catastrophe, in his eyes. Forthwith the _savant_ became grave and circumspect; and, without seeking to compel confidence by any questions, he simply said: "Indeed! an explosion! Will you let me see the injury? You know that before letting chemistry ensnare me I studied medicine, and am still somewhat of a surgeon." On hearing these words Pierre could not restrain a heart-cry: "Yes, yes, master! Look at the injury--I was very anxious, and to find you here is unhoped-for good fortune!" The _savant_ glanced at him, and divined that the hidden circumstances of the accident must be serious. And then, as Guillaume, smiling, though paling with weakness, consented to the suggestion, Bertheroy retorted that before anything else he must be put to bed. The servant just then returned to say the bed was ready, and so they all went into the adjoining room, where the injured man was soon undressed and helped between the sheets. "Light me, Pierre," said Bertheroy, "take the lamp; and let Sophie give me a basin full of water and some cloths." Then, having gently washed the wound, he resumed: "The devil! The wrist isn't broken, but it's a nasty injury. I am afraid there must be a lesion of the bone. Some nails passed through the flesh, did they not?" Receiving no reply, he relapsed into silence. But his surprise was increasing, and he closely examined the hand, which the flame of the explosion had scorched, and even sniffed the shirt cuff as if seeking to understand the affair better. He evidently recognised the effects of one of those new explosives which he himself had studied, almost created. In the present case, however, he must have been puzzled, for there were characteristic signs and traces the significance of which escaped him. "And so," he at last made up his mind to ask, carried away by professional curiosity, "and so it was a laboratory explosion which put you in this nice condition? What devilish powder were you concocting then?" Guillaume, ever since he had seen Bertheroy thus studying his injury, had, in spite of his sufferings, given marked signs of annoyance and agitation. And as if the real secret which he wished to keep lay precisely in the question now put to him, in that powder, the first experiment with which had thus injured him, he replied with an air of restrained ardour, and a straight frank glance: "Pray do not question me, master. I cannot answer you. You have, I know, sufficient nobility of nature to nurse me and care for me without exacting a confession."