But digging up the past is painful, says Mary Harris, who has researched African-American history in Frederick County. She's been following the excavation with interest. Harris says these slaves wanted what everyone wants: a home, family. She says they were survivors who provide a lesson for everyone.

"It's what they overcame. It's strength and perseverance," says Harris. "And we can use those things in our lives today."

National Park Service archeologists resume their work at the L'Hermitage site this summer. Joy Beasley says they hope to eventually set up a permanent exhibit, featuring the artifacts they recover, to tell visitors the story of the plantation's history.