Robert Nighthawk (Robert Lee McCollum) was one of the few Chicago based blues guitarists to make the successful stylistic jump from pre-war acoustic blues playing to post-war electric playing. As a slide player, he was probably the primary guitar influence on Muddy Waters. In addition, he had a wonderfully wry and deceptively smooth vocal style that matched his guitar playing to a tee. Nighthawk never became a major blues star, or achieved the popularity of someone like Muddy or the Wolf, but not for lack of talent.