Who is Uncle Jake?

Uncle Jake is one of Ben Roger's slaves.

"In Ben Rogers' hayloft. He lets me, and so does his pap's nigger man, Uncle Jake. I tote water for Uncle Jake whenever he wants me to, and any time I ask him he gives me a little something to eat if he can spare it. That's a mighty good nigger, Tom. He likes me, becuz I don't ever act as if I was above him. Sometime I've set right down and eat with him. But you needn't tell that. A body's got to do things when he's awful hungry he wouldn't want to do as a steady thing."