In 1984, a professor at Rutgers University stumbled upon a trove of historic data in a courthouse in Pointe Coupee Parish, Louisiana. Over the next 15 years, Dr. Gwendolyn Midlo Hall, a noted New Orleans writer and historian, painstakingly uncovered the background of 100,000 slaves who were brought to Louisiana in the 18th and 19th centuries making fortunes for their owners.