Mary Collyer (1749). “Felicia To Charlotte: Being Letters From A Young Lady in the Country, To Her Friend in Town : Containing A Series of the Most Interesting Events, Interspersed with Moral Reflections ...”, p.203
"L'anisotropie de l'espace. La nécessaire révision de certains postulats des théories contemporaines. Les données de l'expérience" by Maurice Allais, Clément Juglar, Paris, (p. 506), 1997.
Eliza Leslie (1839). “Miss Leslie's Behaviour Book: A Guide and Manual for Ladies as Regards Their Conversation; Manners; Dress; with Full Instructions and Advice in Letter Writing [!]; Receiving Presents; Incorrect Words”, p.259