The family finds Fanny's rejection of Henry's marriage proposal unfathomable and lacking gratitude, but Fanny knows she feels for another and that the proposal should not be trusted (as Henry is of refined manners but questionable in character and fickle). Indeed, Henry's involvement in getting William a naval commission was done mainly to ply on Fanny's gratitude. Sir Thomas, thinking Fanny needs time to get in touch with her heart, sends her with William to their parents' house to face her humble, crowded beginnings and think better of Henry's proposal.
Did You Know?
To think, you are to see the Thrush sail out of Spithead.