When once his fate was decided, Arnauld du Thill lost all his audacity.  Sent back to Artigues, he was interrogated in prison by the judge of Rieux, and confessed his imposture at great length.  He said the idea first occurred to him when, having returned from the camp in Picardy, he was addressed as Martin Guerre by several intimate friends of the latter.  He then inquired as to the sort of life, the habits and relations of, this man, and having contrived to be near him, had watched him closely during the battle.  He saw him fall, carried him away, and then, as the reader has already seen, excited his delirium to the utmost in order to obtain possession of his secrets.  Having thus explained his successful imposture by natural causes, which excluded any idea of magic or sorcery, he protested his penitence, implored the mercy of God, and prepared himself for execution as became a Christian.

The next day, while the populace, collecting from the whole neighbourhood, had assembled before the parish church of Artigues in order to behold the penance of the criminal, who, barefoot, attired in a shirt, and holding a lighted torch in his hand, knelt at the entrance of the church, another scene, no less painful, took place in the house of Martin Guerre.  Exhausted by her suffering, which had caused a premature confinement, Bertrande lay on her couch of pain, and besought pardon from him whom she had innocently wronged, entreating him also to pray for her soul.  Martin Guerre, sitting at her bedside, extended his hand and blessed her.  She took his hand and held it to her lips; she could no longer speak.  All at once a loud noise was heard outside:  the guilty man had just been executed in front of the house.  When finally attached to the gallows, he uttered a terrible cry, which was answered by another from inside the house.  The same evening, while the body of the malefactor was being consumed by fire, the remains of a mother and child were laid to rest in consecrated ground.