Howlin' Wolf, aka Chester A. Burnett (1910-1976), legendary Blues musician. His gravestone contains pictures of a guitar and a harmonica. 20 years after his death, fans still bring gifts of guitar picks and coins from around the world.
Links:
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Bull Cow Moanin' at Midnight: A Tribute to Howlin' Wolf
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The (unofficial) Howlin' Wolf Web Site
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The Howling Wolf Photos