Does anyone know of a chart of the flows of influence over time of delta blues-guitarists?

Thanks for any links,

I don't know of any flow charts on the web, but it's easy enough to find a timeline. Just do a Google search for delta blues history timeline.

It basically all starts with Charlie Patton and Henry Sloan on the Dockery Plantation in the late 1800s.

A great book on the subject is Deep Blues by Robert Palmer.