David's mixed reaction when he returns to the Peggottys' house likely reflects the changes he has experienced since he was last there. He arrives with memories of his prior trip in mind, and while the place physically resembles these recollections, this only underscores the fact that David himself is now different, and that he therefore can't expect to relive his past experiences. What's more, Emily has changed as well, and her relationship with David takes on a flirtatious edge that wasn't present when they were younger.