This is great information you posted.
I lost my G-gf in Battle of Shiloh---or just after, on May 6th, Corinth. An old letter from Columbia TN talks about a burial near there, and the last page of the letter describes the burial, but I've not been able to actually locate the grave. The letter was in his son's trunk---who lived in MS. Do you have any reference of any soldiers that were sent to Columbia, TN by rail after Shiloh? Family said, 'he died at Shiloh.' Military said, May 6th, Corinth--but no rec of bur.