Lawful Issue is a novel written by James Blyth and first published in 1906. The story revolves around the life of a young woman named Mary, who is the daughter of a wealthy businessman. Mary is engaged to a man named John, who is also from a wealthy family. However, John's father disapproves of the marriage and tries to break the engagement. In the meantime, Mary's father dies and she discovers that he had a secret will, which leaves all his wealth...