Ladislaw is an interesting character. He sizes Dorothea up right quick. Casaubon sure doesn’t love him, though Brooke is jolly about him.
Casaubon is one of those who people who do everything “correctly” and “right” but they have no joy in it. A man like Brooke, or Sir James probably fail and idle quite a lot, but they’re not worried about pretenses. Ladislaw is right to want to get away to Italy ASAP.