Guillaume's gloom was generally attributed to the feelings of anger and revolt into which the condemnation of Salvat had thrown him. He had flown into a passion on his return from the Palace of Justice, declaring that the execution of the unhappy man would simply be social murder, deliberate provocation of class warfare. And the others had bowed on hearing that pain-fraught violent cry, without attempting to discuss the point. Guillaume's sons respectfully left him to the thoughts which kept him silent for hours, with his face pale and a dreamy expression in his eyes. His chemical furnace remained unlighted, and his only occupation from morn till night was to examine the plans and documents connected with his invention, that new explosive and that terrible engine of war, which he had so long dreamt of presenting to France in order that she might impose the reign of truth and justice upon all the nations. However, during the long hours which he spent before the papers scattered over his table, often without seeing them, for his eyes wandered far away, a multitude of vague thoughts came to him--doubts respecting the wisdom of his project, and fears lest his desire to pacify the nations should simply throw them into an endless war of extermination. Although he really believed that great city of Paris to be the world's brain, entrusted with the task of preparing the future, he could not disguise from himself that with all its folly and shame and injustice it still presented a shocking spectacle. Was it really ripe enough for the work of human salvation which he thought of entrusting to it? Then, on trying to re-peruse his notes and verify his formulas, he only recovered his former energetic determination on thinking of his marriage, whereupon the idea came to him that it was now too late for him to upset his life by changing such long-settled plans.