Captain Anderson socially humiliates Colley by denying him the right to walk on the quarterdeck where other 'ladies and gentlemen' are free to go. He's not allowed to preach, except when Edmund twists the Captain's arm, and it doesn't go well. This is not altruistic. Edmund is playing shipboard politics and wants to get one over on the Captain because he knows he hates Colley. Edmund despises Colley, a gentleman by profession, but so far beneath him with his rustic ways. 4/n