Mercy Dee Walton has been played on NTS in shows including Diddy Wah, featured first on 25 January 2016. Songs played include Come Back Maybellene.

Mercy Dee (Walton), 1915-1962, was a Texas blues and barrellhouse pianists. you can read more about hime here: http://www.tshaonline.org/handbook/online/articles/WW/fwabv.html