Historical clue formulations

• Fictional character who says "I am a brain …. The rest of me is a mere appendix" — 2025-10-09
• Fictional sleuth on Baker Street — 2024-05-13
• "A Study in Scarlet" detective — 2024-03-05
• "The Five Orange Pips" sleuth — 2010-03-21
• Famous deerstalker wearer — 2009-10-25
• To whom Mortimer declares "They were the footprints of a gigantic hound!" — 2009-09-06
• Noted resident of Baker Street — 2005-03-22