Librivox: Missing: Page Thirteen by Green, Anna Katharine

Summary: Violet Strange, a clever petite detective, is called upon to solve the mystery of a page gone missing from an important document. The futures of several people, including an eccentric misanthrope, a chemical scientist, a bride and groom, depend on the quick resolution of this problem. In solving one mystery, she uncovers another which dates back many years. (Summary by Bev J. Stevens)