British writer, and creator of Sherlock Holmes, the best-known detective in literature and the embodiment of ratiocination, or deductive reasoning. Doyle himself believed in fairies and was very interested in occultism. Sherlock Holmes stories have been translated into more than 50 languages. ALS signed “A. Conan Doyle,” one page, 4.75 x 6.5, May 1897. Letter to a friend. In part, “I am so sorry that I can’t play on the 19th. By an extraordinary coincidence, it is the day when Barnes’ literary team (which I usually captain) has its one annual match & I am under a permanent promise to play for them…Couldn’t you come to a modest unceremonious no-dress dinner tomorrow?” In fine condition, with some light mirroring of ink from premature folding along a bisecting horizontal mailing fold. COA John Reznikoff/PSA/DNA and R&R COA.