More from Arthur Conan Doyle
- The Stark Munro Letters (1894)
- The Boer War (1902)
- The Hound of the Baskervilles (1902), Chapter 2In context
People/Arthur Conan Doyle/Quote

In solving a problem of this sort, the grand thing is to be able to reason backwards.
A Study in Scarlet (1887), Part II: The Country of the Saints, Chapter VII
Quote and source from Wikiquote, CC BY-SA 4.0