Historians think August 25th, 1619, was the day the first enslaved Africans set foot in the English colonies. This Sunday marks 400 years since that day. In recognition, The World’s Rupa Shenoy will bring us stories from Ghana all this week. Today Rupa focuses on one person’s connections to the past — a Massachusetts professor doing an archeological dig at a slave castle in Accra, who discovered her own ancestor was one of the castle’s governors.