Arthur Conan Doyle

391 cryptograms in the catalog, every one taken from Arthur Conan Doyle’s own writing rather than from a quotation list.

The Sherlock Holmes stories and The Hound of the Baskervilles. Holmes explains himself constantly, and that is the form, so his lines arrive pre-shaped as statements about method, which is a genre of quotation almost nobody else here produces.

Where they come from

  • The Adventures of Sherlock Holmes216
  • The Hound of the Baskervilles173
  • The Case-Book of Sherlock Holmes1

390 of these name the book they came from. The remaining 1 are remarks, letters and speeches, which carry no work.

How hard they are

Graded by the model in our guide to solving cryptograms: 101 easy, 165 medium and 125 hard. Most of Arthur Conan Doyle’s puzzles land in the medium tier.

They average 71.2 letters over 19.2 distinct ones, with 4.2 letters appearing exactly once, which are the letters a frequency count cannot help you with. 9.7% carry an apostrophe, which hands over a letter outright.

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