This collection contains photocopies of typed transcripts of the letters of Thomas Watson, a private in Company D, 93rd Illinois Infantry during the American Civil War. The letters commence with Watson's training at Camp Douglas, Illinois, then follow his regiment's movements throughout the war. Writing to his parents and brother from camps in Mississippi, Tennessee, Alabama, and Georgia, Watson provides descriptions of prisoners at Camp Douglas, his regiment's movements and battles, his environs, Southerners, and camp life. The letters are accompanied by a brief chronology of Watson's military activities and movements.