Elizabeth was the daughter of John Benger or Benjey and his wife Mary, née Long. Her father was a tradesman in Wells, but he became a Royal Navy purser in 1782 and the family lived mainly in Chatham, Kent until 1797. According to her fellow writer Lucy Aikin, Elizabeth early showed "an ardour for knowledge, a passion for literature." She was allowed at the age of twelve to attend a local boys' school to learn Latin, and in the following year had a poem published called The Female Geniad. This featured "female theologians, scholars, and preachers such as Cassandra del Fides, Isabella of Barcelona, and Issona of Verona, alongside Cornelia, as historic women to inspire 'the British fair' of her day." It was preceded by a customarily apologetic preface that "deploys innocence with great sophistication", as recent commentators put it. "The voice [of the poem]... is the voice of cultural authority." 
Impoverished after the death of her father in 1796, the family moved to Devizes, Wiltshire and then to London in 1802, where Benger made the acquaintance of several literary figures. These included the novelists Jane and Anna Maria Porter, and the poet Caroline Champion de Crespigny, a former mistress of Lord Byron. She later became known to John Aikin and his daughter Lucy, the poet and children's writer Anna Laetitia Barbauld, Sarah Wesley, the writer daughter of the prominent Methodist Charles Wesley, and the novelist and actress Elizabeth Inchbald. She made a poorer impression on Charles and Mary Lamb, and on the diarist Henry Crabb Robinson, who described her as "ludicrously fidgety" at a party where Wordsworth was present.
Elizabeth wanted to become a playwright, but she had no success and soon turned to poetry with a social message. "The Abolition of the Slave Trade" appeared in 1809, with verse by James Montgomery and James Grahame on the same subject. Then came two novels, the second of which was also translated into French.
She later turned to non-fiction, translating from German and introducing a volume of letters by Friedrich Gottlieb Klopstock, and to writing and compiling competent biographical materials on Elizabeth Hamilton, John Tobin, Elizabeth of Bohemia, Anne Boleyn and Mary, Queen of Scots between 1818 and 1825. After that, her health began to fail. She was collecting materials for a life of Henry IV of France when she died on 9 January 1827.
- ODNB entry: Retrieved 10 March 2011. Subscription required.
- L. Aikin: "Memoir of Miss Benger" In:Memoirs, Miscellanies, and Letters... (London: Longman, 1864). Quoted in ODNB entry.
- Reprinted as The Female Geniad, a poem written at the age of thirteen (London: T. Hookham etc., 1791).
- Emma Major: Madam Britannia. Women, Church, & Nation 1712–1812. (Oxford: OUP, 2012), p. 313. Retrieved 18 January 2013.
- Opening the Nursery Door. Reading, Writing and Childhood 1600–1900. ed. Mary Hilton etc. (Abingdon, UK: Routledge, 1997) Retrieved 18 January 2013.
- Letters of Charles and Mary Lamb, ed. E. W. Marrs, Vol 1 (Ithaca, NY/London: Cornell UP, 1975), p. 198.
- ODNB entry.
- Poems on the Abolition of the Slave Trade (London: T. Bensley, 1809). Frontispiece: Retrieved 10 March 2011.
- Marian (1812) and The Heart and the Fancy, or Valsinore (London: Longman & Co., 1813).
- Klopstock and his friends. A series of familiar letters, written between the years 1750 and 1803 (London, 1814).
- Memoirs of the late Mrs. Elizabeth Hamilton. With a selection from her correspondence, and other unpublished writings (London: Longman, 1818); Memoirs of John Tobin ... With a selection from his unpublished writings (London: Longman, 1820); Memoirs of the Life of Anne Boleyn, Queen of Henry VIII (London: Longman, 1821); Memoirs of the Life of Mary Queen of Scots (London: Longman, 1823); Memoirs of Elizabeth Stuart, Queen of Bohemia, daughter of King James the First. Including sketches of the state of society in Holland and Germany, in the 17th century (London: Longman, 1825); ODNB entry and British Library catalogue.
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