A commission? Was it possible that Chaffin had in very truth not hesitated to commit the most shocking of private crimes, the betrayal of a dead wife to her husband, of an illegitimate son to the head of a family, after all the benefactions he had received, and all for fear of losing his percentage, as Métivier had said, of the four millions? Was it possible? At all events the objection urged at first by M. de Claviers was removed: the fact that the anonymous letter was sent before Chaffin's dismissal did not prove that he was not guilty. And yet how many things still made it improbable that he was! And in the first place, that he had had Madame de Claviers' letters in his possession! Improbability? Yes. Impossibility? No. Here the son's complicity once more appeared as the essential and sufficient condition. All these ideas were whirling about in Landri's mind as he returned from Place de la Madeleine toward Rue du Faubourg-Saint-Honoré. They suddenly crystallized in a resolution which caused him to turn his back on his home and walk toward Place de la Concorde, then through the Tuileries toward the Seine, Notre-Dame, and Ile Saint-Louis. How many times he had followed that route, a mere child, on his way from the paternal abode to Quai de Béthune, where Chaffin's family then lived. Having agreed, it will be remembered, to live with his pupil, he often took him on Sunday to pass a few hours with Madame Chaffin, their daughter Louise, and their son Pierre, in the fourth floor apartment, from the balcony of which one commanded such a beautiful view of the Seine, with the chevet of Notre-Dame at the right, the dome of the Panthéon and of the Val-de-Grâce in front, and at the left the thickets of the Jardin des Plantes and the Salpêtrière. In course of time the Chaffins had gone down to the third floor, then to the first, without leaving the house, which was convenient to the young medical student because of the proximity of the Hôtel-Dieu and the Latin Quarter. Louise had never married, and Madame Chaffin was still living. These recollections of an existence apparently so upright protested in the former pupil's heart against the insulting step he was preparing to take. He was going to question Pierre Chaffin. But great heaven! That virtuous occupant of an old house on a patriarchal quay had actually put his fingers in his master's fortune. Were there but one chance in a thousand, in ten thousand, that he had likewise stolen Madame de Claviers' letters, with the connivance of his son Pierre, that one chance was enough to cause Landri to try, at whatever cost, to find out.