Developments are underway to renovate a 19th century cotton mill into a craft brewery and loft apartments in Greensboro, Georgia. But 11 years ago, developer Nathan McGarity made a surprising discovery in the mill’s rafters. He discovered a trove of old letters and pictures that revealed a little known piece of US history. 

We speak with Nathan and Steven Brown, archivist emeritus at the University of Georgia's Hargrett Rare Book & Manuscript Library, about what they found