His organ recordings are scarce, but are well worth the trouble of searching for. The title track from his Cryin' Time (Vanguard) is one of the most inspiring organ pieces I know. In fact, in terms of organ playing, it doesn't get any better than this track. There are a few more organ tracks on that album, plus a couple more on his recently reissued Chicago Blues (Testament/Hightone).
Jazz ~ Blues ~ Funk ~ Jazz-Funk ~ Acid-Jazz ~ Rock ~ Reggae