Thanks for the information. He might be the man I'm looking for (or he might not be), but at least this tells me that members of his battery are buried at the cemetery. Personally, I think he's buried either in the cemetery or on the battlefield at Chickamauga (near Glass' Mill) in an unmarked grave. No proof, just a gut feeling.
He's not a relative, just a boy from my hometown (Fitchburg, MA), who died a long way from the banks of the Nashua River.