If you've been seeing the Boomtown Rats for these last years, you will have noticed that, during 'Mary Of The Fourth Form', the band turn to the blues in the breakdown with that boom, boom, boom thing, the core of rock music, a sound and ideal that comes from so many folk traditions. Here, a lone Rat offers his respect to one of the greatest men of the blues; a man who sold his soul to the devil for mastery of the guitar at the crossroads on the intersection of U.S. Routes 61 and 49, Clarksdale,