Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.246, Penguin
Louis Antoine de Saint-Just's speech to the National Convention (December 27, 1792), as quoted in "Oeuvres Completes de Saint-Just", Volume 1, edited by Charles Vellay (p. 383), 1908.