In 2005 Margaret Jones Bolsterli learned that her great-great-grandfather was a free mulatto named Jordan Chavis, who owned an antebellum plantation near Vicksburg, Mississippi. The news was a shock; Bolsterli had heard about the plantation in family stories told during her Arkansas Delta childhood, but Chavis's name and race had never been mentioned. With further exploration Bolsterli found that when Chavis's children crossed the Mississippi River...