His resolution not to accompany Derues had saved his life. The latter could not carry out his culminating crime at Buisson-Souef; it was only in Paris that his victims would disappear without his being called to account. Obliged to leave hold of his prey, he endeavoured to bewilder him in a labyrinth where all trace of truth might be lost. Already, as he had arranged beforehand, he had called calumny to his help, and prepared the audacious lie which was to vindicate himself should an accusation fall upon his head. He had hoped that Monsieur de Lamotte would fall defenceless into his hands; but now a careful examination of his position, showing the impossibility of avoiding an explanation had become inevitable, made him change all his plans, and compelled him to devise an infernal plot, so skilfully laid that it bid fair to defeat all human sagacity. Monsieur de Lamotte arrived in Paris early in March. Chance decided that he should lodge in the rue de la Mortellerie, in a house not far from the one where his wife’s body lay buried. He went to see Derues, hoping to surprise him, and determined to make him speak, but found he was not at home. Madame Derues, whether acting with the discretion of an accomplice or really ignorant of her husband’s proceedings, could not say where he was likely to be found. She said that he told her nothing about his actions, and that Monsieur de Lamotte must have observed during their stay at Buisson (which was true) that she never questioned him, but obeyed his wishes in everything; and that he had now gone away without saying where he was going. She acknowledged that Madame de Lamotte had lodged with them for six weeks, and that she knew that lady had been at Versailles, but since then she had heard nothing. All Monsieur de Lamotte’s questions, his entreaties, prayers, or threats, obtained no other answer. He went to the lawyer in the rue de Paon, to the schoolmaster, and found the same uncertainty, the same ignorance. His wife and his son had gone to Versailles, there the clue ended which ought to guide his investigations. He went to this town; no one could give him any information, the very name of Lamotte was unknown. He returned to Paris, questioned and examined the people of the quarter, the proprietor of the Hotel de France, where his wife had stayed on her former visit; at length, wearied with useless efforts, he implored help from justice. Then his complaints ceased; he was advised to maintain a prudent silence, and to await Derues’ return. The latter thoroughly understood that, having failed to dissipate Monsieur de Lamotte’s fears, there was no longer an instant to lose, and that the pretended private contract of February 12th would not of itself prove the existence of Madame de Lamotte. This is how he employed the time spent by the unhappy husband in fruitless investigation.