Listening to Now: Chicago blues

One of the music blogs I follow posted this picture.  It was too special not to pass on.

So here's Muddy Waters performing a song entitled "Country Blues"

Which, curiously, is a variation on a much earlier song by Son House entitled variously "Death Letter" or "Walking Blues":

And to round things out, here's Howlin Wolf performing a classic Chicago song: "The Killing Floor".  (The killing floor was the slaughter house in the Chicago stockyards).