The Edwin Messer Civil War Letters is a collection of letters written by Edwin Messer during his service with the 37th Illinois Infantry of the Union Army. Written to his Mother, Sister, and Girlfriend, the letters describe his accounts of the Siege of Vicksburg the battles of Prairie Grove and Pea Ridge.

This collection contains the photocopies of letters sent by Edwin Messer of the 37th Illinois Infantry Regiment of the Union Army during the Civil War. Messer writes to his Sister, Mother, and Girlfriend as his Regiment moves across Illinois through Missouri and into Arkansas and finally Mississippi. Messer describes the Battles of Pea Ridge, Prairie Grove, the Siege of Vicksburg, and many minor skirmishes.