It was all very well to imprison the widow, but her participation in the outrage on M. de Saint Pierre was by no means established.
The reputed brother, who had been in the habit of attending on her at the Rue de Boulogne, still eluded the searches of the police. In silence lay the widow's only hope of baffling her enemies. Unfortunately for the widow, confinement told on her nerves. She became anxious, excited. Her very ignorance of what was going on around her, her lover's silence made her apprehensive; she began to fear the worst. At length—the widow always had an itch for writing—she determined to communicate at all costs with Gaudry and invoke his aid. She wrote appealing to him to come forward and admit that he was the man the police were seeking, for sheltering whom she had been thrown into prison. She drew a harrowing picture of her sufferings in jail. She had refused food and been forcibly fed; she would like to dash her head against the walls. If any misfortune overtake Gaudry, she promises to adopt his son and leave him a third of her property. She persuaded a fellow-prisoner; an Italian dancer undergoing six months' imprisonment for theft, who was on the point of being released, to take the letter and promise to deliver it to Gaudry at Saint Denis. On her release the dancer told her lover of her promise. He refused to allow her to mix herself up in such a case, and destroyed the letter. Then the dancer blabbed to others, until her story reached the ears of the police. Mace sent for her. At first she could remember only that the name Nathalis occurred in the letter, but after visiting accidentally the Cathedral at Saint Denis, she recollected that this Nathalis lived there, and worked in an oil factory. It was easy after this for the police to trace Gaudry. He was arrested. At his house, letters from the widow were found, warning him not to come to her apartment, and appointing to meet him in Charonne Cemetery. Gaudry made a full confession. It was his passion for the widow, and a promise on her part to marry him, which, he said, had induced him to perpetrate so abominable a crime. He was sent to the Mazas Prison.
In the meantime the Widow Gras was getting more and more desperate. Her complete ignorance tormented her. At last she gave up all hope, and twice attempted suicide with powdered glass and verdigris. On May 12 the examining magistrate confronted her with Gaudry. The man told his story, the widow feigned surprise that the "friend of her childhood" should malign her so cruelly. But to her desperate appeals Gaudry would only reply, "It is too late!" They were sent for trial.
The trial of the widow and her accomplice opened before the Paris Assize Court on July 23, 1877, and lasted three days. The widow was defended by Lachaud, one of the greatest criminal advocates of France, the defender of Madame Lafarge, La Pommerais, Troppmann, and Marshal Bazaine. M. Demange (famous later for his defence of Dreyfus) appeared for Gaudry. The case had aroused considerable interest. Among those present at the trial were Halevy, the dramatist, and Mounet-Sully and Coquelin, from the Comedie Francaise. Fernand Rodays thus described the widow in the Figaro: "She looks more than her age, of moderate height, well made, neither blatant nor ill at ease, with nothing of the air of a woman of the town. Her hands are small. Her bust is flat, and her back round, her hair quite white. Beneath her brows glitter two jet-black eyes—the eyes of a tigress, that seem to breathe hatred and revenge."
Gaudry was interrogated first. Asked by the President the motive of his crime, he answered, "I was mad for Madame Gras; I would have done anything she told me. I had known her as a child, I had been brought up with her. Then I saw her again. I loved her, I was mad for her, I couldn't resist it. Her wish was law to me."
Asked if Gaudry had spoken the truth, the widow said that he lied. The President asked what could be his motive for accusing her unjustly. The widow was silent. Lachaud begged her to answer. "I cannot," she faltered. The President invited her to sit down. After a pause the widow seemed to recover her nerve.
President: Was Gaudry at your house while you were at the ball?
Widow: No, no! He daren't look me in the face and say so.
President: But he is looking at you now.
Widow: No, he daren't! (She fixes her eyes on Gaudry, who lowers his head.)