Because Izzy Young is the one who says Dylan's homage to bluesmen Mance Kipscomb and Blind Arvella Gray may be fabricated and not Dylan himself, I do not necessarily take it as gospel. I believe Dylan heard these guys and may well have extrapolated elements of their influence.

I notice that a reissue of Blind Arvella Gray's music came out just this summer and I've been meaning to buy it at Amazon.