'Grandmother,' Marc quietly answered, 'it was agreed that we should not speak of those matters any more. I have not ventured to make the slightest allusion to them; it is you who begin again. But what good can a dispute do? My conviction is absolute.'
'And you know the real culprit, and you intend to denounce him to justice?' asked the old lady, quite beside herself.
'Certainly.'
At this Pélagie, who was beginning to clear away, could not restrain herself. 'In any case it isn't Brother Gorgias, I can answer for that!' she suddenly cried.
Marc, enlightened by these words, turned towards her. 'Why do you say that?' he asked.
'Because on the evening of the crime Brother Gorgias accompanied my nephew Polydor to his father's, on the road to Jonville, and got back to the school before eleven o'clock. Polydor and other witnesses testified to that at the trial.'
Marc was still gazing fixedly at the old woman, but his mind was busy at work. That which he had long suspected was becoming a moral certainty. He could picture the Brother accompanying Polydor, then returning homeward, pausing before Zéphirin's open window, and talking to the boy. At last he climbed over the low window bar, the better perhaps to see the pictures which the lad had set out on his table. Then, however, came the horrid impulse, abominable madness... and, the child strangled, the murderer fled by the window, which he still left wide open. It was from his own pocket that he had taken that copy of Le Petit Beaumontais to use it as a gag, never noticing in his perturbation that the copy-slip was with the newspaper. And on the morrow, when the crime was discovered, it was Father Philibin, who, finding himself unable to destroy the slip, as Mignot had seen it, had been obliged to content himself with tearing away the corner on which the stamp was impressed, thus at all events removing all positive proof of the place whence the slip had come.
Slowly and gravely Marc answered Pélagie: 'Brother Gorgias is the culprit, everything proves it, and I swear it is so!'
Indignant protests arose around the table. Madame Duparque was stifling with indignation. Madame Berthereau, whose mournful eyes went from her daughter to her son-in-law, whose rupture she sorely dreaded, made a gesture of supreme despair. And while little Louise, who paid great attention to her father's words, remained there quietly, never stirring, Geneviève sprang to her feet and quitted the table, saying: