As an author, you're allowed to repeat yourself. Sherlock Holmes's clues.
“Data, data, data! I can’t make bricks without clay!” the iconic literary sleuth Sherlock Holmes once declared. Over a hundred years after his debut, Adam Frost and Jim Kynvin went back through Conan-Doyle’s stories to in search of data to explain Sherlock’s enduring appeal. Above are some of the fun tidbits they uncovered. --The Guardian