In this country [England] it is good to kill an admiral from time to time, to encourage the others. The reference is to Admiral John Byng, who was executed in 1757 for failing to prevent the French from taking Minorca.
You see, Mademoiselle, I have experience, I know the world. To pass the time, why don't you ask every passenger to tell you his life's story? And if there is a single one among them who has never cursed his life, who has not often told himself that he was the unhappiest of men, then you may throw me overboard, headfirst!