Descendant of Robert E. Lee

In the "trivia" section for the film "Gods and Generals" it says that Robert
Duvall is descended from Robert E. Lee (whom he portrayed in the film). I do
see a resemblance between the two of them. As a person who is related to (but
not directly descended from) Robert E. Lee, I was wondering if anyone has a
"tree" showing just how the talented Mr. Duvall is descended from General Lee.

In addition to collecting Movies and Television DVDs and memorabilia, one of my
other hobbies is genealogy. As both Mr. Duvall and I are related to Robert E.
Lee in different ways, I would be honored to know just how I am related to
Mr. Duvall.

If anyone knows, please post. If you have another website for us to click onto
add this also.

Thanks!