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- Alvarez, Marino. "A Professor Reflects on Sherlock Holmes." Google Books. 4/11/17. <https://books.google.com/books?id=g9y6BAAAQBAJ&pg=PT81&dq=sherlock+holmes+valley+of+fear+doyle&hl=en&sa=X&ved=0ahUKEwjZptfB4J3TAhUS92MKHfZXByg4HhDoAQhOMAg#v=onepage&q=sherlock%20holmes%20valley%20of%20fear%20doyle&f=false>.
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- Wynne, Catherine. "Mollies, Fenians, and Arthur Conan Doyle." 4/13/17. <https://english.chass.ncsu.edu/jouvert/v4i1/wynne.htm>.
- "Sherlock Holmes' Dr Watson was 'based on Dundee doctor'." BBC. 4/21/17. <http://www.bbc.com/news/uk-scotland-tayside-central-26070900>.
- Hilton, Craig. "John Watson - The Good Doctor?." 4/21/17. <http://members.iinet.net.au/~exlibris/watson.html>.
The Valley of Fear
by Sir Arthur Conan Doyle
The Valley of Fear Sources and ClassicNote Author
