Under Marching Orders: A Story of Mary Porter Gamewell is a biographical novel written by Ethel Daniels Hubbard. The book tells the story of Mary Porter Gamewell, a woman who devoted her life to missionary work in China during the late 19th and early 20th centuries. The novel follows Mary's journey from her upbringing in a small town in Pennsylvania to her eventual arrival in China as a young missionary. The book explores the challenges and triumphs...