John Selden (1800). “The Table-talk: Of John Selden, Esq. Being His Sense of Various Matters of Weight and High Consequence; Relating Especially to Religion and State”, p.75
Joseph Lancaster (1807). “Improvements in Education, as it Respects the Industrious Classes of the Community: Containing Among Other Important Particulars, an Account of the Institution for the Education of One Thousand Poor Children, Borough Road, Southwark; and of the New System of Education on which it is Conducted”, p.151
Henry David Thoreau, Barry Andrews (2005). “True Harvest: Readings from Henry David Thoreau for Every Day of the Year”, p.83, Unitarian Universalist Association of Congregations