Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.145, Penguin
Richard Chenevix Trench (1867). “On the Study of Words Lectures Addressed (originally) to the Pupils at the Diocesan Training-school, Winchester by Richard Chenevix Trench”, p.24