Anthony Trollope (2015). “The Palliser Novels: Complete Parliamentary Chronicles (All Six Novels in One Volume): Can You Forgive Her? + Phineas Finn + The Eustace Diamonds + Phineas Redux + The Prime Minister + The Duke’s Children”, p.1776, e-artnow
Edward Heath's remarks to the press after Harold Wilson was hit by eggs thrown by demonstrators on two successive days (June 1, 1970), as quoted in Edward Heath "The Course of My Life" (p. 305), 1998.
William Stanley Jevons's reflections on his earlier life, written when he was 27 (December 1862); later published in "Letters and Journal of W. Stanley Jevons" edited by Harriet A. Jevons, his wife (p. 12), 1886.