Gaskell EC. The Life of Charlotte Brontë: author of 'Jane Eyre,' 'Shirley,' 'Villette,' 'The Professor,' etc., Elder Smith, 1896, p. 287 read online or download
Brontë, Charlotte (6 April 2000), Smith, Margaret (ed.), "1848–1851", The Letters of Charlotte Brontë: With a Selection of Letters by Family and Friends, Vol. 2: 1848–1851, Oxford University Press, p. 67, doi:10.1093/oseo/instance.00186258, ISBN978-0-19-818598-7, retrieved 21 May 2021
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Brontë, Charlotte (6 April 2000), Smith, Margaret (ed.), "1848–1851", The Letters of Charlotte Brontë: With a Selection of Letters by Family and Friends, Vol. 2: 1848–1851, Oxford University Press, p. 67, doi:10.1093/oseo/instance.00186258, ISBN978-0-19-818598-7, retrieved 21 May 2021