"The Reaction in Germany" by Mikhail Bakunin (October 1842), signed "Jules Elysard"; as quoted in Mikhail Bakunin "Bakunin on Anarchism" edited and translated by Sam Dolgoff, www.marxists.org. 1971.
Isaac Barrow (1734). “The Usefulness of Mathematical Learning Explained and Demonstrated: Being Mathematical Lectures Read in the Publick Schools at the University of Cambridge”, p.32
Jean de La Bruyère, Luc de Clapiers marquis de Vauvenargues (1903). “La Bruyère and Vauvenargues: Selections from the Characters, Reflexions and Maxims”