1. “Harriet Martineau and H. G. Atkinson: No Disciple of Miss Martineau.” 1851. The Leader, 15 March, pp. 256.
2. “Letters on the Laws of Man’s Nature and Development.”: 1 March 1851a. Journal of the Belles Lettres, no. 1780, p. 155.
3. “Letters on the Laws of Man’s Nature and Development.”: May 1851b. The Gentleman’s Magazine, p. 519–23.
4. “Miss Martineau an Avowed Infidel.” 1851. Vermont Chronicle, 1 April, p. 50.
5. Boucher-Rivalain, Odile. 2012, Autumn. Harriet Martineau (1802–1876), from Unitarianism to agnosticism. Believing in Victorian Times, OpenEdition Journals 76:27–43.