I would appreciate clues regarding where I might find list of the burial place(s) of Confederate soldiers killed in the battle of Shiloh.

Specifically, I am seek the burial site of:

Pvt. R. W. Harris, Co. A, 7th Texas Infantry; KIA 07 Apr 62, Shiloh, Tennessee. He was serving with 8th Texas Cavalry; the unit with whom Harris had escaped Fort Donelson, Tenn. Most of the 7th Texas Infantry was captured.

The only reference I have found is the Confederate Burial Trench at the Shiloh National Military Park.
http://www.tennesseehistory.com/RESOURCE/RSHILOH.htm reports that the 'Confederate Burial Trench' "is the largest of five trenches in which Confederate dead were buried. More than 700 soldiers lie here".