PIN POINT, Ga. — Clarence Thomas was here promoting his memoir a few years ago when he bumped into Algernon Varn, whose grandfather once ran a seafood cannery that employed Justice Thomas’s mother as a crab picker.

Mr. Varn lived at the old cannery site, a collection of crumbling buildings on a salt marsh just down the road from a sign heralding this remote coastal community outside Savannah as Justice Thomas’s birthplace. The justice asked about plans for the property, and Mr. Varn said he hoped it could be preserved.

‘And Clarence said, ‘Well, I’ve got a friend I’m going to put you in touch with,’