"The Southern history collections at the Briscoe Center are recognized nationally as one of the major resources for research on the history of the American South, including the eleven states that seceded from the Union in 1860 and 1861. The holdings provide an in-depth understanding of the historical development of the South, with a special emphasis on chattel slavery, the cotton economy, and the Civil War. Also included are comprehensive collections of newspapers from across the South covering the colonial era through Reconstruction and into the Jim Crow era."
https://briscoecenter.org/collections/american-south/