Who is Lieutenant Augustine Chadwick from Lord Hornblower and what is their importance?

Lieutenant Augustine Chadwick was the captain of the Flame both before and after the mutiny. Years earlier, Hornblower served with Chadwick as a midshipman, and he conceded that Chadwick is fairly incompetent and possessed of a vicious streak. When Hornblower learns of the mutiny, he is not surprised, but rather, sympathizes with the mutineers. Nevertheless, after capturing Flame, Hornblower puts Chadwick back in temporary command—the only possible action due to naval etiquette. Chadwick represents the worst of the Royal naval tradition.