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1. Doyle gained popularity with his detective collection where he introduced one of the best detectives of literary history 'Sherlock Holmes'..
2. Doyle developed his habit of writing not from school, rather from sending letters to his mother.
3. When Doyle was 27, he wrote 'A Study in Scarlet' in which he introduced Sherlock Holmes, the most famous detective.
4. Sherlock Holmes was based on Doyle's favorite University professor Joseph Bell.