Hodding Carter III, associate editor of the racially liberal Delta Democrat Times of Greenville, Miss., and a Nieman Fellow, will speak at 5 p.m. today in Cabot Hall. His topic will be "The South: What Now?" At 3:30 p.m. in the Leverett House Old Library, Charles Morgan Jr. an official of the American Civil Liberties Union, will speak on "Operation Southern Justice."