The study of Jane Austen’s novels, many of them about 200 years old, is never complete. And neither is the excavation of the beloved author’s personal life. Austen’s personal values — namely, whether she supported slavery — have been debated by literary enthusiasts and experts who read her work like a cipher. A new discovery adds a new wrinkle to the “Pride and Prejudice” author’s personal lore: Her dear brother Henry was sent as a delegate to the World Anti-Slavery Convention in 1840.