But the black Mississippi Delta field
workers who, during the Forties and Fifties, were heading north to
Chicago in great numbers, passed through Memphis on their way out of the
Delta. And they had all the best tunes. Elvis Presley was in the right
place, at the right time, to understand the power of the blues. After
Elvis left Sun for RCA he recorded in Nashville, the epicentre of
country music. This is important, because Elvis didn't just rework
blues, he also borrowed from country. His first B-side was the bluegrass
standard "Blue Moon of Kentucky".