United States film actor noted for playing gangster roles (1893-1973) United States poet; author of narrative verse (1869-1935) United States baseball player; first Black to play in the major leagues (1919-1972) United States historian who stressed the importance of intellectual and social events for the course of history (1863-1936) Irish playwright and theater manager in Dublin (1886-1958) United States prizefighter who won the world middleweight championship five times and the world welterweight championship once (1921-1989) English chemist noted for his studies of molecular structures in plants (1886-1975)