- ^ a b Arthur Conan Doyle. The Memoirs of Sherlock Holmes. Oxford University Press, 1993, p. 274
- ^ Cawthorne, Nigel (2011). A Brief History of Sherlock Holmes. Running Press. p. 75. ISBN 978-0762444083.
- ^ "The Adventures of Sherlock Holmes. XXIV.—The Adventure of the Final Problem". The Strand Magazine, vol. 6, pp. 559–70. Bound volume 6 viewed at HathiTrust Digital Library. Retrieved 25 July 2019. Unnumbered page 558 is the December 1893 frontispiece, which illustrates this story. Artist Sidney Paget is credited in the volume Index.
- ^ Barnes, Alan (2011). Sherlock Holmes on Screen. Titan Books. pp. 13–14, 64–66, 104–105. ISBN 9780857687760.
- ^ Dickerson, Ian (2020). Sherlock Holmes and His Adventures on American Radio. BearManor Media. p. 49. ISBN 978-1629335087.
- ^ Dickerson, Ian (2020). Sherlock Holmes and His Adventures on American Radio. BearManor Media. pp. 86, 89–90, 96–97, 102, 104, 130. ISBN 978-1629335087.
- ^ Barnes, Alan (2011). Sherlock Holmes on Screen. Titan Books. pp. 21–23, 41, 114–115, 152–153. ISBN 9780857687760.
- ^ Bert Coules. "The Memoirs of Sherlock Holmes". The BBC complete audio Sherlock Holmes. Retrieved 12 December 2016.
- ^ Bert Coules. "His Last Bow". The BBC complete audio Sherlock Holmes. Retrieved 5 December 2020.
- ^ Wright, Stewart (30 April 2019). "The Classic Adventures of Sherlock Holmes: Broadcast Log" (PDF). Old-Time Radio. Retrieved 5 December 2020.
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