. >> host: and we have been talking on booktv with georgetown law professor louis mike l seidman -- michael seidman about his book, "on constitutional disobedience." and you are watching booktv on c-span2. >> you're watching booktv, nonfiction authors and books every weekend on c-span2. >>> during booktv's recent trip to chattanooga, tennessee, we took a tour of the civil war papers of john t. wilder, a native northerner who relocated to the south after he attacked a union officer during the civil war. >> collections of the university of tennessee of chattanooga. the john q. oliver papers that we have here at the university, a collection that we acquired around 1960 from one of general wilder's daughters who was till alive at the time -- the still alive at the time, she donated a collection of military documents and letters that her father wrote to their mother in indiana during the war. wilder, after the war, did what a lot of union officers did, he moved to chattanooga from indiana or from the midwest. and he became a prominent businessman and an industrialist throughout the south. he ope