You already have everything about this soldier that appears in his military service file. Since Harris was present for duty most of the time between his enlistment and the Battle of the Wilderness, review Dunbar Rowland's history of the 19th Mississippi Regiment. This will help you understand his military experiences up until what must have been a near-fatal gunshot wound to the chest. You'll find the Mississippi State Archives to be quite interesting, but I wouldn't wish you to be disappointed because more particulars on Jeptha Harris of Water Valley could not be found.