A Case of Identity is one of the 56 short Sherlock Holmes stories written by Sir Arthur Conan Doyle and is the third story in The Adventures of Sherlock Holmes. The story revolves around the case of Miss Mary Sutherland, a woman with a substantial income from the interest on a fund set up for her. She is engaged to a quiet Londoner who has recently disappeared. Sherlock Holmes' detective powers are barely challenged as this turns out to be quite an elementary case for him, much as it puzzles Watson. The fiancé, Mr. Hosmer Angel, is a peculiar character, rather quiet, and rather secretive about his life. Miss Sutherland only knows that he works in an office in Leadenhall Street, but nothing more specific than that. All his letters to her are typewritten, even the signature, and he insists that she write back to him through the local Post Office.The climax of the sad liaison comes when Mr. Angel abandons Miss Sutherland at the altar on their wedding day. Famous works of the author Arthur Conan Doyle's: A Study in Scarlet, Silver Blaze, The Hound of the Baskervilles, The Yellow Face, A Scandal in Bohemia, The Red-Headed League, A Case of Identity, The Boscombe Valley Mystery, The Five Orange Pips, The Man with the Twisted Lip, The Blue Carbuncle, The Speckled Band, The Engineer's Thumb, The Noble Bachelor, The Beryl Coronet, The Copper Beeches and many more.