Who is Daddy Jack from The Complete Tales of Uncle Remus and what is their importance?

Daddy Jack, also known as African Jack, came from Africa around the age of twenty and remained an important person on the river plantation throughout his life. He tells stories, and his dialect varies greatly from that of Uncle Remus, which is a sign of his African ties. He eventually courts a young woman on the plantation and wins her favor, though there seems to be an incredible difference in their ages.