Geroge Allen (1808-1876) was the grandnephew of Ethan Allen. George wrote The Life of Philidor, Musician and Chess-Player, in 1858 and had it published in Philadelphia in 1863. He was the first to reveal how the Turk operated, in a book on the first American Chess Congress. He was a lawyer, rector of an Episcopal Church, and professor of Greek and ancient languages at Delaware College and the University of Pennsylvania. In 1832, he was married by Reverend Ralph Waldo Emerson to Mary Hancock, niece of the famous John Hancock. George Allen had one of the largest chess libraries in the 19th century, which was purchased by the Library Company of Philadelphia in 1878.