One sultry afternoon in the summer of 1919 a seventeen-year-old colored boy was swimming in Lake Michigan by a Chicago bathing-beach. Part of the shore had been set aside by mutual understanding for the use of the whites, another part for the Negroes. The boy took hold of a railroad tie floating in the water and drifted across the invisible line. Stones were thrown at him; a white boy started to swim toward him. The colored boy let go of the railroad tie, swam a few strokes, and sank. He was drowned.