GOOD DETECTIVE WORK
Brad Quinlin determined Carr's identity through a lot of research. Using a collection of Civil War letters from the 34th Illinois from the Chicago History Museum archives, he found that Carr hd reported for duty June 27th and that five men from the regiment had been killed, but Carr's name was not among them.
After five years of research, Mark Carr was the only soldier killed on June 27, 1864, whose burial spot could not be found.
In 1914, the state of Illinois erected a 30 foot marble monument of land at Kennesaw Mountain. Carr's grave is right by it.
Great Detective Work and Mystery Solved. --Old B-Runner