The Sinister Mark

Donald Morris, wealthy `man about town', has fallen madly in love with mysterious stage actress Mary Blake. As the story begins, Donald has professed his love and asked Mary to be his wife. Despite her obvious feelings for him, Mary cannot accept and soon disappears from her apartment, where she lives with her twin sister, Anne, who has also vanished. Mary has sent Donald a cryptic note that leaves Donald frantic. He hires the highly recommended detective, Peter Clancy, to help him find Mar...