Almost impossible to find autographed 3.25 x 5.5-inch sepia-tone postcard portrait-- although signatures and letters abound-- neatly signed along the bottom border in black fountain pen around 1908-1910, further desirable in that he wrote his full name, and not just A.C. Doyle or Arthur C. Doyle. Around the year this card was signed, he was penning classic Sherlock Holmes stories like "The Adventure of the Bruce-Partington Plans," "The Adventure of the Dying Detective," "The Disappearance of Lady Frances Carfax," "The Adventure of the Devil's Foot," and "His Last Bow." In fine condition for its age, with gentle silvering, confined to the edges. Another example of the same image sold at auction in 2012 for $1,986.00. Beloved Scottish physician and author Sir Arthur Conan Doyle is remembered as the creator of Sherlock Holmes, arguably the greatest gumshoe in the history of crime fiction, as well as for his Professor Challenger sci-fi series and the fantasy novel The Lost World.