Someone emailed me this article by the famed genealogist and author
Tony Burroughs about why it's so difficult to trace African
ancestry.
Terrific explanation plus some tips on how to research slaves.
Here's the link to the blog on AC 360:
http://ac360.blogs.cnn.com/2009/07/17/why-re-tracing-our-african-roots-is-so-difficult/
Kberry