Christopher Pittard is Senior Lecturer in English Literature at the University of Portsmouth, specialising in Victorian literature. His books include a new critical edition of The Return of Sherlock Holmes (2023), The Cambridge Companion to Sherlock Holmes (2019), and Purity and Contamination in Late Victorian Detective Fiction (2011). He has published numerous articles on Victorian culture in journals including Studies in the Novel, 19; Interdisciplinary Studies in the Long Nineteenth Century, Victorian Periodicals Review, Clues: A Journal of Detection, and Women: A Cultural Review.