John Bunyan (1851). “Christian Behaviour: A Holy Life, the Beauty of Christianity, the Fear of God, and an Exhortation to Unity and Peace to which is Added a Caution Against Sin”, p.75
Marcus Tullius Cicero (1855). “Cicero's Three books of offices, or moral duties: also his Cato Major, an essay on old age; Lælius, an essay on friendship; Paradoxes; Scipio's dream; and Letter to Quintus on the duties of a magistrate”, p.241