Here's an interesting thread discussing some of the references in the song "If You Ever Go To Houston" on Dylan's new album.
The original article is lame, typical internet snark-masquerading-as-opinion-masquerading-as-
something-interesting-to-say, but then a commenter who actually knows what he's talking about shows up, and provides some actual, you know, information. It's entertaining watching the original poster lose control. It's the opposite of a lot of internet postings, where something substantive get hijacked by snarky comments: here the snarky post gets hijacked by substantive comments, and the poster panics. Heh.
Anyway, the comments explain an obscure reference in the song (Bagby and Lamar).