1. Braddon, Mary Elizabeth. Lady Audley’s Secret. 1861. London: Penguin, 1998.
2. Craig, Patricia and Mary Cadogan. The Lady Investigates: Women Detectives and Spies in Fiction. London: Victor Gollancz, 1981.
3. Carnell, Jennifer. The Literary Lives of Mary Elizabeth Braddon: A Study of Her Life and Work. Hastings: Sensation Press, 2000.
4. Costantini, Mariaconcetta. ‘Crossing Boundaries: Generic Impurities and Experimentation in Catherine Crowe’s Novels.’ Rivista di Studi Vittoriani. 41–42 (2016): 33–50.
5. Crowe, Catherine. Letters. Catherine Crowe Archive. Special Collections & Archives, University of Kent.
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