Translations for prolong in French

Here are paragraphs from public domain books translated:

Such are the true facts of the death of Dr. Grimesby Roylott, of Stoke Moran. It is not necessary that I should prolong a narrative which has already run to too great a length, by telling how we broke the sad news to the terrified girl, how we conveyed her by the morning train to the care of her good aunt at Harrow, of how the slow process of official inquiry came to the conclusion that the doctor met his fate while indiscreetly playing with a dangerous pet. The little which I had yet to learn of the case was told me by Sherlock Holmes as we travelled back next day.

C’est ainsi que mourut le docteur Grimesby Roylott, de Stoke Moran. Il n’est pas nécessaire de prolonger un récit déjà trop long, en racontant comment après avoir appris la vérité à la jeune fille, nous l’amenâmes par le train du matin à sa chère tante de Harrow. L’enquête officielle prouva que le docteur avait trouvé la mort en jouant imprudemment avec un dangereux reptile. Holmes acheva de m’éclairer sur cette sinistre affaire en rentrant à Londres, le lendemain.

The Adventures of Sherlock Holmes, by Arthur Conan Doyle

Les Aventures de Sherlock Holmes, de Arthur Conan Doyle