Quiet and extremely unassuming off the bandstand, Hubert Sumlin played a style of guitar incendiary enough to stand tall beside the immortal Howlin' Wolf. The Wolf was Sumlin's imposing mentor for more than two decades, and it proved a mutually beneficial relationship; Sumlin's twisting, darting, unpredictable lead guitar constantly energized the Wolf's 1960s Chess sides, even when the songs themselves (check out "Do the Do" or "Mama's Baby" for conclusive proof) were less than stellar. Sumlin started out twanging the proverbial broom wire nailed to the wall before he got his ...