You can find virtually everybody black back as far as the 1870 census. Why 1870? That's when the ex-slaves first have surnames. But if you find your great-great-grandfather in 1870 and it says he's 50, that means he was born in 1820 and you're back to 1820 already. For an American that's pretty damned good, you know?
Henry Louis GatesThousand years ago, we all descended from Africans who left the continent. Those ancestors, we will never know their name. We can go back 200 or 300 years and actually populate your family tree with real people who had names and documents. They had customs, characteristics that, unbeknownst to you, you have inherited. Almost through osmosis it has been passed down to you.
Henry Louis Gates