The bulk of this collection consists of Civil War letters from Benjamin B. Brock of the 26th Michigan Infantry to his family. Brock fought in the eastern theater and was wounded at Spottsylvania, but later returned to his regiment. His letters describe his experiences but are generally concerned with home matters. He frequently expressed his dissatisfaction with the army and especially with a war to free slaves.

The letters relating to his service in the Civil War have been transcribed, scannedm and placed online at http://civilwar.archives.msu.edu/collection/7-1C-51/brock/.