40 CD box set. Artists include John Lee 'Sonny Boy' Williamson, Leadbelly, Big Bill Broonzy, Bessie Smith, Muddy Waters, Mississippi John Hurt, Memphis Minnie, John Lee Hooker, Big Joe Williams and many more. 725 tracks all digitally remastered to enhance the original recordings without manipulating the character of the music. Recordings made between 1923 and 1948. 20 double slimline jewel cases housed together in a cardboard box.