Langdon Elwyn Mitchell (1862-1935) was an American playwright, son of S. Weir Mitchell and grandson of John Kearsley Mitchell. Born in Philadelphia, he studied in Dresden and Paris, attended the Harvard and Columbia law schools, and was admitted to the New York bar in 1886. He wrote under the pen name of John Philip Varley, and his plays include: His books include: Mitchell became a member of the National Institute of Arts and Letters.