The 2011 issue of the Oxford American Music Magazine featured artists from Mississippi. It comes with a CD and has an article about each artist.

"Tallahatchie River Blues" by Mattie Delaney was a standout.

You can listen/download it here

http://funfunfunmedia.com/2010/12/mattie-delaney-tallahatchie-river-blues/

and "Down The Big Road Blues" here

http://funfunfunmedia.com/2010/03/mattie-delaney-down-the-big-road-blues-mp3/

There is an article about Mattie Delaney here (not the article in the magazine)

http://www.oxfordamerican.org/articles/2011/nov/21/which-would-you-pick/

and Wikipedia has a page for her.