At his death in 1865, which assassin was supposedly engaged to Lucy Hale, daughter of a former U.S. senator?

At his death in 1715, which French king had reigned 72 years, longer than any other monarch of a major European state? At his death in 1727, which scientist left behind more than a million words he had written on alchemy and the occult? At his death in 1790, which Founding Father left 200-year trust funds to the cities of Boston and Philadelphia? At his death in 1832, Charles Carroll of Maryland was the last surviving signer of which document? At his death in 1902, who left most of his fortune to fund scholarships for study at Oxford University? At his death in 1915, which educator was buried on the campus of the Tuskegee Institute he led? At his death in 1931, which New Jersey-based inventor held more than a thousand patents? Which renowned concert pianist served as Poland's prime minister in 1919?