In 1888 a client comes with two puzzles for Holmes. The first is the disappearance of her father Captain Arthur Morstan in December 1878 and the second is that she has received 6 pearls in the mail from an anonymous benefactor once a year since 1882, since she answered an anonymous newspaper query inquiring for her. With the last pearl she has received a letter remarking that she has been a wronged woman and asks for meeting. Holmes takes the case and soon discovers that Major Sholto (Morstan's only friend who had denied seeing Morstan) had died in 1882 and that within a short span of time Mary Morstan began to receive the pearls, implying a connection. The only clue Mary can give Holmes is a map of a fortress with the names of Jonathan Small and three Sikhs,who are strangely named as Dost Akbar, Abdullah Khan, Mahomet Singh… (Excerpt from Wikipedia)
Sir Arthur Ignatius Conan Doyle KStJ DL (22 May 1859 – 7 July 1930) was a British writer best known for his detective fiction featuring the character Sherlock Holmes. Originally a physician, in 1887 he published A Study in Scarlet, the first of four novels and more than fifty short stories about Holmes and Dr. Watson. The Sherlock Holmes stories are generally considered milestones in the field of crime fiction. Doyle was a prolific writer; his non-Sherlockian works include fantasy and science fiction stories about Professor Challenger and humorous stories about the Napoleonic soldier Brigadier Gerard, as well as plays, romances, poetry, non-fiction and historical novels. One of Doyle's early short stories, "J. Habakuk Jephson's Statement", helped to popularise the mystery of the Mary Celeste. (Wikipedia)