Let me elaborate a bit. One historian has correlated, on a small scale I
believe, surges in local VA court sessions to adjudicate the ages of slaves
with the arrivals of slave ships. So if one could trace one's ancestry back
to a person in a court session, one might be able to line that up with a
specific ship, but I'm not sure. Perhaps the records of that ship would lead
to further discoveries in archives abroad. This is not something I've done
and I'm speaking off the top of my head (perhaps "through my hat," as my
father used to say). 

HW