Disc four concludes with seven tracks from Robert Petway, including his influential version of "Catfish Blues." The final disc opens with six more Petway recordings, followed by a dozen Honeyboy Edwards field recordings made for Alan Lomax in 1942, and then concludes with the eight sides Willie "Poor Boy" Lofton recorded for Decca Records in 1934 and 1935 (including his "Dark Road Blues," a version of Tommy Johnson's "Big Road Blues"). What holds all of this together? Countless songs that are essentially variations of "Baby Please Don't Go" and "49 Highway Blues," showing the real and pervasive influence of Williams' rough and ragged approach to Mississippi blues.