Letter to her daughter Mary, Countess of Bute, 30 May 1756, in Robert Halsband (ed.) 'The Complete Letters of Lady Mary Wortley Montagu' vol. 3 (1967) p. 107
Massachusetts. Board of Education, Horace Mann (1849). “The Massachusetts System of Common Schools: Being an Enlarged and Rev. Ed of the Tenth Annual Report of the First Secretary of the Massachusetts Board of Education”, p.80