Translations for refresh in French

Here are paragraphs from public domain books translated:

"Dear Professor Challenger," it said, "As a humble student of Nature, I have always taken the most profound interest in your speculations as to the differences between Darwin and Weissmann. I have recently had occasion to refresh my memory by re-reading———"	« Cher professeur Challenger, « Je ne suis qu’un modeste curieux des lois naturelles. J’ai toujours pris l’intérêt le plus vif à vos spéculations sur Darwin et Weissmann. Récemment encore, j’ai eu l’occasion de me rafraîchir la mémoire en relisant…
The Lost World, by Arthur Conan Doyle	Le Monde perdu, de Arthur Conan Doyle