For those interested, there's an article on the magazine section of Grace Centered about Marshall Keeble
Marshall Keeble (1878-1968)
Marshall Keeble was born on December 7, 1878 on a farm near Murfreesboro, Tennessee. He was the son of Robert and Mittie Keeble, who were former slaves. When he was just four years old, his family moved to the city of Nashville. He attended the Bellview and Noles schools until the seventh grade, and then left school to help support the family.