George Santayana, James Seaton (2014). “Genteel Tradition in American Philosophy and Character and Opinion in the United States: And Character and Opinion in the United States”, p.143, Yale University Press
William Shenstone (1765). “Essays on men and manners. A description of the Leasowes, the seat of the late William Shenstone, esq., by R. Dodsley. Verses to Mr. Shenstone”, p.142