Recalling the tidal wave of racial conflict that followed in the wake of the surging Mississippi as it inundated the delta town of Greenville, Miss., in April 1927. Greenville's leading planter, LeRoy Percy, was a racial moderate, but he joined other planters in refusing to allow their black workers to be evacuated for fear of losing their labor supply. Those workers were placed "at the end of the line" for Red Cross supplies, as one remembers, and tension grew.