He was anxious to avoid the notice of his cousins, from a conviction that if they saw him depart, they could not fail to conjecture his design, and he was not willing to have the attempt known till its success could be known likewise; for though feeling almost secure, and with reason, for Charlotte had been tolerably encouraging, he was comparatively diffident since the adventure of Wednesday.

...
A promise of secrecy was of course very dutifully given, but it could not be kept without difficulty; for the curiosity excited by his long absence burst forth in such very direct questions on his return as required some ingenuity to evade, and he was at the same time exercising great self-denial, for he was longing to publish his prosperous love. (chpt 22).