During the years before the Civil Rights movement got underway, segregated American cities helped give birth to a touring circuit that provided employment for hundreds of black musicians and eventually brought about the birth of rock 'n' roll. Today, rock historian Ed Ward looks at two books, Preston Lauterbach's The Chitlin' Circuit and the Road to Rock 'n' Roll and Fever, Susan Whitall's biography of Little Willie John, one of the Chitlin' Circuit's last stars.