Translations for decoy in French

Here are paragraphs from public domain books translated:

“We now come to that portion of his life which has proved to be of such intense interest to us. The fellow had evidently made inquiry, and found that only two lives intervened between him and a valuable estate. When he went to Devonshire his plans were, I believe, exceedingly hazy, but that he meant mischief from the first is evident from the way in which he took his wife with him in the character of his sister. The idea of using her as a decoy was clearly already in his mind, though he may not have been certain how the details of his plot were to be arranged. He meant in the end to have the estate, and he was ready to use any tool or run any risk for that end. His first act was to establish himself as near to his ancestral home as he could, and his second was to cultivate a friendship with Sir Charles Baskerville and with the neighbours.

« Arrivons maintenant à la seule partie de sa vie qui nous offre vraiment de l’intérêt. Stapleton avait pris ses informations et savait que deux existences seulement le séparaient de la possession du riche domaine de Baskerville. « Je crois qu’à son arrivée dans le Devonshire, son plan était encore mal défini. Mais, dans le fait de présenter sa femme comme sa sœur, je trouve la preuve que, dès le début, il nourrissait déjà de mauvais desseins. Il avait l’intention manifeste de se servir d’elle comme d’un appât, quoiqu’il ne sût pas encore exactement de quelle façon il tendrait sa toile. « Il convoitait le domaine et, pour en venir à ses fins, il était prêt à employer tous les moyens, à courir tous les risques. D’abord il s’installa dans le plus immédiat voisinage de la demeure de ses ancêtres ; puis il tâcha de conquérir l’amitié de sir Charles Baskerville et de ses autres voisins.

The Hound of the Baskervilles, by Arthur Conan Doyle

Le Chien des Baskerville, de Arthur Conan Doyle