The five releases in the "Roots and Folklore: Episodes In The Development of American Folk Music" (his final recordings) led me to search out his earlier work on Black Saint, Emenem and Moers Music, etc. This is one of those recordings. I love to hear Carter musically interact with Bobby Bradford. They are such a contrast in styles and musical conceptions yet they complimant each other so beautifully.
John Carter was under recorded and consequently never achieved the recognition he deserved. He influenced many improvising musicians (he's been the subject of at least two tribute recordings that I know of - one by Ab Baars (check out my archive) and one by Francois Houle - both of which I recommend wholeheartedly).