Philip Dormer Stanhope (4th earl of Chesterfield.), Charles Caleb Colton (1861). “Lord Chesterfield's advice to his son on men and manners. To which are added, selections from Colton's 'Lacon'.”, p.154
Benjamin Franklin (1815). “The works of the late Dr. Benjamin Franklin: consisting of his Life, written by himself. Together with humorous, moral and literary essays, chiefly in the manner of the Spectator. Among which are several not in any American edition”, p.74
Joseph Lancaster (1803). “Improvements in Education, as it Respects the Industrious Classes of the Community: Containing, a Short Account of Its Present State, Hints Towards Its Improvement, and a Detail of Some Practical Experiments Conducive to that End”, p.50