In 1947, 1948 and 1959, renowned folklorist Alan Lomax (1915-2002) went behind the barbed wire into the Mississippi State Penitentiary at Parchman. Armed with a reel-to-reel tape deck--and, in 1959, a camera--Lomax documented as best an outsider could the stark and savage conditions of the prison farm, where the black inmates labored "from can't to can't," chopping timber, clearing ground and picking cotton for the state.
They sang as they worked,...