RENEE MONTAGNE, HOST:
This morning we continue our summer road trip, Dead Stop.
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MONTAGNE: We're visiting interesting cemeteries and resting places of the famous and not so famous. In one of the oldest cemeteries in California's Sonoma County, about 60 miles north of San Francisco, gravestones that vanished a century ago are reappearing.
NPR Producer Cindy Carpien went there to unravel the mystery.
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CINDY CARPIEN, BYLINE: In 1850, pioneers, who left Missouri by wagon train, settled near what is now Sebastopol, California. And this graveyard on a hill, called the Gilliam Cemetery, was started when Polly Gilliam Sullivan and her husband Isaac, needed to bury their stillborn son.
TONY PIRES: This is the very first stone of the very first burial in 1852.
CARPIEN: Tony Pires is the volunteer caretaker of this cemetery where many of the town's pioneers rested peacefully, until the early morning of April 18th, 1906. That's when the San Andreas Fault ruptured offshore from San Francisco, picking up speed as it traveled north and into places like the Gilliam Cemetery.
JACK BOATWRIGHT: A remarkable amount of damage, particularly in the northeast section of ground, where the...
CARPIEN: USGS Seismologist Jack Boatwright reads notes from his first visit to this graveyard in 2006 for the earthquake's 100th anniversary. His assignment was to create the first digital shake map of the quake. He confirmed that some of the strongest shaking happened in this area of Northern California. And the evidence is still visible in old graveyards. That's where Boatwright found pre-1906, three foot marble headstones broken, like this one for pioneer Elizabeth Crowe.
BOATWRIGHT: It was knocked out and shattered into, it looks like, about five pieces.
CARPIEN: At the time, Boatwright noted that two thirds of the gravestones in this cemetery most likely fractured during the quake. We told this story on NPR in 2006. But back then, Boatwright was unaware that caretaker Tony Pires was finding headstones hidden to Boatwright.
PIRES: Jack, when you were here, this one was buried, that one was buried, these were...
CARPIEN: Seventy-five-year old Tony Pires volunteered at first, to mow the cemetery's lawn. Occasionally, he'd find partially buried pieces of headstones. So he investigated further with a skinny welding rod or a poker, gently pushing it into the ground.
PIRES: And I keep poking and then...
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PIRES: ...sometimes it's a can. Sometimes it's a bottle. Sometimes it's a stone.
PIRES: And that's when I get all excited.
CARPIEN: Now, the earthquake may have caused the head stones to topple, but the ground did not open up and swallow them in 1906. In fact, a graveyard has a way of consuming things all on its own. And it's quite lively. Growing plant roots and birds pecking for seeds loosen the dirt around broken stones. And then, Tony Pires says, there's a bigger culprit and the clues are all around us.
PIRES: Gopher holes and the gopher trails. That gopher loves to dig and the stones fall into the dirt.
PIRES: And they get buried even more.
CARPIEN: Now, Jack, let me ask you. Of course, you could not have factored in gopher effect when you were looking here?
BOATWRIGHT: No, I...
BOATWRIGHT: I was pretty ignorant of gophers when I went through these cemeteries. So any stones that Tony has unearthed would increase the estimate of ground shaking that I had previously.
CARPIEN: So far, Tony Pires has pieced together close to 30 headstones including two we're standing in front of now.
JEAN MCNEAR POWERS: They are my great-great-great-great grandparents.
CARPIEN: Jean McNear Powers smiles at the twin monuments for the pioneer couple who started this cemetery, Isaac Sullivan and his wife, Polly. Powers believes about 40 of her relatives are buried here. But until Tony Pires started poking around, she didn't know where some of them were.
POWERS: It brings me peace and contentment and gratitude, because, as I look at the stones, there were so many children. And I have family members, like my daughter, who because of modern medicine are still alive today and would have been one of those tiny head stones years ago.
CARPIEN: Tony Pires walks by another of Powers ancestors, Benjamin Taylor who died in 1873.
PIRES: He was the one that drove the wagon train. This stone was buried under about a foot of dirt. It's missing one small triangle. And I may never be able find it. I'll keep looking 'cause it's fun.
CARPIEN: And Tony Pires can keep as busy as he likes. According to records and family accounts, there are dozens more old markers and headstones missing, presumably buried in the Gilliam Cemetery.
Cindy Carpien, NPR News.
MONTAGNE: And there's a lovely slideshow of those old headstones at NPR.org. Transcript provided by NPR, Copyright National Public Radio.